DE1491847B1 - Device for generating gaseous oxygen for inhalation - Google Patents

Description

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The invention relates to a device for production lines connected valves and to the supply of gaseous oxygen for inhalation, steam pipes connected valves to each other standing from two double-walled, thermally insulated fit, the one being under tension by a spring Reservoirs for liquefied oxygen, held by the valve disc through the stem of the veins each with a line for filling the fluid seat and the valve seat through the housing of the sigen oxygen and is pushed away with a line to the stem.

would take and to evaporate the liquid oxygen. The oxygen device according to the invention, the Sauerfes is provided, and with means for connecting the fabric releases in controllable quantities, has the disadvantages both containers. of the previously known devices. It's smaller and

Doctors prescribe more and more easily to older patients, so that it is also borne by patients Exercise to improve blood circulation.

and to stimulate the uptake of oxygen and blood- in the drawing and the description below

normalize pressure and pulse. In many cases, an exemplary embodiment is explained. It shows however, these regulations are not followed because F i g. 1 is a perspective view of the entire,

the patient becomes short of breath, easily fatigued and, according to the invention, consists of two main parts-pain and other complaints. Through the device,

Inhalation of oxygen-rich air can cause problems. 2 shows a section of the first main part of

Difficulties in such cases largely reduced device according to the invention with some parts in or be remedied entirely, so that the patient can see his side view,

Continue exercises and finally a nor- ao F i g. 3 shows a section of a modified embodiment Life can lead. This is the case with the form of handling of the first main part of the invention lung and heart disorders are becoming increasingly important. moderate device with some parts in side view,

There are devices for dispensing oxygen F i g. 4 shows a section of the second main part of

known for inhalation, which has a single double device with some parts in side view,
walled container with evaporation lines on 35 The device according to the invention supplies oxygen as it is z. B. in the German patents _on inhalation in a controllable amount from a fixed 209 041 and 119 126 are described. The well-known _and easy-to-use source. It comprises a ten medical oxygen therapy devices corresponds _ers t _e source of oxygen for use at the patient Neither mounted stationarily or so heavy that it bed, a second source of oxygen, which are practically not movable with oxygen. As a result, the 30 is _{filled from} the first source and for therapy therapy, if such devices can be used outside the bed at all, and are available, limited to practical and safe connecting means for this purpose for transferring from clinics or hospitals. The supply of oxygen from the first to the second source is necessary according to individual requirements.

is not possible if the patient is connected to such devices 35. The first source comprises a first double wall. In the absence of a source that creates an oxygen-rich hazardous container for receiving and storing atmosphere for inhalation, the oxygen in the liquid state and for delivering home therapy fails. Even when oxygen demand of oxygen as needed in the gaseous state of shackled to the bed of the patient application available _for inhalation in a controllable amount. The second use of the oxygen device because of the size and 40 source includes a second, smaller, slightly more complex obstacle in the way. portable double-walled container for holding

The object of the invention is to provide and store oxygen in a liquid oxygen device to get the oxygen from the first source and to release it releases this device because of or oxygen if required in gaseous state in thanks to its small size and low controllable quantities. The lanyard includes weight practical and easy to use, so that sen two sections; the first is with the first source it can also be worn by patients. connected, and the second with the second, so that

According to the invention, this object is achieved quickly and easily by the second source on the first solves that the means for connecting the two can be arranged. Using this double-walled heat-insulated storage container for sun lanyards allows filling of the second, liquefied oxygen from two valve groups portable source without touching cold fittings and stand with the closure parts of the two containers without the use of cumbersome hoses. The Verter are connected, the one valve group from binding agents also reduce frost formation and consists of two identical valves, the oxygen losses in two housings.

are arranged, each with a fitting screw and a 55. Both the first and the second source have Nut as a carrier for a shaft with valve plate, vapor extraction means that gas with the storage tank connected within the valve with a space by a spring of the first or second container valve seat held under tension are in contact to keep the pressure below the maximum allowable stands, whereby one of the two valves with the liquid level to keep and dangerous overpressure versigkeitsleitung, prevent the other with the vent line 60. Furthermore, both sources have the liquid one connected and the second group of valves two oxygen vaporizing means, which it in one equate Has valve housing that each transform a breathable atmosphere by means of, as well as means that a spring movable valve plate and a solid release this atmosphere and with the gas with arranged valve seat, wherein the one of the liquid evaporation connected to the sources both Valves are connected to the liquid line, the other 65 means. In addition, the first is connected to the steam line so that the source is provided with means that the liquid Apply the second container to reverse oxygen in the first container under a pre-order on the first container, keep the operating pressure that is correct with the liquid. The second source has

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Means for controlling the flow of liquid into the to be avoided. If steam were extracted, it would second container. the concentration of hydrocarbon impurities

In Fig. 1 shows the entire treatment according to the invention, which have a higher boiling point, in the treatment device. It has a first oxygen remaining liquid, which swells, a second source of oxygen B and compound oxygen would be unsuitable for inhalation. In addition, this embodiment has an increase in the hydrocarbon content in the liquid control panel D and a protective carrying container E. Oxygen can also become a fire hazard if the patient carries the portable. If only liquid oxygen is removed, the second source leads B can be carried over the shoulder. This purity of the remaining liquid always depends on the device and its operation will in the following be to a high degree, since the saturated liquid acid is individual on the basis of FIG. 2, 3 and 4 explained. substance and the oxygen vapor in the first source A

be maintained at a substantially equal and constant First Oxygen Source purity level.

As shown in FIG. 2 can be seen, the first oxygen If a patient from the source A directly with sour source A a storage vessel supplied material with outer Man- 15 10, it is pressurized, gesättel 12, the preferential at a distance from an inner vessel 14 liquid via the tube 34 is removed and arranged so that the liquid evaporation means 36 passes between the inner surface. From the jacket 12 and the outer surface of the vessel 14, gaseous oxygen is produced via which an insulating space 16 which can be evacuated by hand is produced. The inner line valve 44 to be actuated to a respiratory pre-vessel 14 is passed on the jacket 12 through a thin 20 direction, for example an oxygen mask (not poorly thermally conductive pipe socket 18, suspended, shown).

the one access channel 20 to the interior of the vessel. The means 36 for liquid evaporation comprise

14 forms. The insulating space 16 is evacuated by the descent of a "pinch tube 22" warmed by the surrounding air and expediently contains a heated coil, the insulation shining through from the cap 30 downwards as protection against the inlet to the bottom of the first source A to extend penetrate from external heat. Other and then upward insulation around the jacket 12 can also be used, but the insulation winds through to the valve 44. The snake must be long enough from those that have been developed up to now to be effective enough to completely absorb the oxygen that has been withdrawn. A molecular sieve adsorbent 24 is expediently provided in an indentation 26 to vaporize and sufficiently overheat, through 30 (heating) so that it is suitable for inhalation. Adsorption of after mechanical evacuation.Its length depends on the maximum amount that each of the insulating space 16 can be removed through the evacuation pipe 22 times, the temperature, the vacuum on remaining traces of gas, the oxygen to be overheated and the temperature maintained. A tear door to the surrounding atmosphere provided in the jacket 12, with which the oxygen located in the plate 28 prevents a dangerous overpressure exchange in the event that the container 35 superheater coil should leak into heat. Over the snake 36 is a hood in the isolation room 16. 46, which protects the former from knocks and contact,

On the other hand, there is enough air around the windings around the upper end of the feed channel 20 Means, for example a cap 30 (Fig. 2) to flow around so that the inside Gas sealing of the interior of the vessel 14 against 40 oxygen can be vaporized and overheated. One Provided above the surrounding atmosphere or drip channel48 collects condensation on the windings Cap 30 with attachment 32 (Fig. 3). With the reserved moisture.

A preferred embodiment of the first source A are a The first source A can with liquid oxygen

Pipe 34 for the transfer of liquid, liquid supply at atmospheric pressure and then put under damping means 36 and the first section of the pressure 45, so that the binding agent C (hereinafter referred to as "connecting liquid oxygen" at the desired operating medium C ₁ * called) connected to the cap 30. pressure is saturated. The first source A is expediently shown in FIG. 3 via the seduction form of the source A takes this feature of binding agent C with pressurized and accounted for. The cap 32 shown here can be filled with saturated liquid oxygen. (For handling purposes and then liquid oxygen into the interior, it is expedient that the pressure of the vessel 14 be poured. If desired, stored liquid oxygen is sufficient to gas the first source A as in FIG. 2 be at a pressure of approximately) men without Abnehförmigen oxygen of the cap 32 via the connecting means C ₁ 3.5 atm. to be supplied by the connecting means C ₁ not overall pressurized liquid oxygen and liquid oxygen passes fills the Überleitungsrohr34 55 . In any case, as shown in FIG. 3, material must be in the lower part of the vessel 14. Means for sensing the liquid level, for example thermistors 40 and 42, which maintain pressure in the inner vessel, are on a control circuit tel 50, which is shown connected to a pressure regulator 52 with pressure tight) and lead the flow switch 54, be provided, fluid level in the container 10 from. This control circuit 60 The saturation of the liquid oxygen can be designed so that the filling of the embodiment of the source A according to FIG. 3 first source A obtained from a liquid, not shown, by means of pressure generating means 50, which a keitsvorrat is automatically controlled. Resistance heater surrounded by a shell 58. It is encompassed 56 when delivering oxygen for inhalation. The pressure switch 54, a pressure essential that only liquid oxygen is withdrawn from the first 65 load valve 60 and a pressure rupture disk 62 from source A via the pipe 34, are connected to the cap 32 so as to prevent an increase in hydrocarbon contaminants. Inside the inner vessel are in communication, which find themselves in the purest oxygen, The pressure switch 54 is usually when the pressure

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of the stored liquid a predetermined height see the inner surface of the outer shell and the has, opens and closes when the liquid outer surface of the inner vessel has an evacuable isopressure falls below this level. Closing the lierraum 96 results. The jacket 92 has been expedient Switch 54 causes a bulge 98 in the wires 64, which gives it greater strength flowing current reaches the heater 56. 5 award. The inner vessel 94 is in the jacket As a backup, the pressure-generating circuit 92 is provided with a double-walled, weakly heat-conducting circuit built-in thermal safety switch 66 that holds the pipe 100 that has an access channel 102 prevents the heater 56 from forming the interior to its interior. The annular space 104 Vessel 14 overheated. If the liquid level is too low between the concentric tubes of the pipe 100 rig and the heating device 56 is energized ίο is connected to the insulating space 96 via gas, sets before the inner vessel is refilled. This is evacuated via the evacuation tube 106 and the safety switch 66 is thus heated and is preferably covered with a translucent insulating layer the pressure generating circle lined before damage tion to protect against ingress of can occur. Outside heat. In a bulge 110 is a

FIG. 3 likewise shows another embodiment containing a molecular sieve adsorbent 108 which maintains the shape of the liquid vacuum shown in FIG. One in attenuator. If the source A according to FIG. 3, the tear plate 112 provided on the jacket 92 is used to supply a patient directly with oxygen, preventing a dangerous rise in pressure in the pressurized liquid isolation space 96 if the container 90 leaks. Oxygen through the transfer pipe 34 into the 20. Attenuating means 36 are passed around the upper part of the access channel 102. From these, gas conveying means such as a cap 114 and a moderate oxygen flow through the manual valve 44, which, if a hood 116 is provided around the inside of the vessel, can have a rotometer 68 and control the oxygen flow 94 gas-tight to the surrounding atmosphere, in a breathing apparatus, for example to complete. In the preferred embodiment, an oxygen mask (not shown) is passed. 25 of the source B is a liquid conduit tube 118, the liquid evaporation means 36 comprises an evaporation means 120, a pressure control device tube 70 with an electric heater 72 therein, the device 122 and the second portion of the connection outer spiral notches to the passage means C (hereinafter "connection means C ₂ "of liquid and vapor. This section 74 is called) connected to the cap 116, can be made of any thermally conductive material such as 30 If the second source B is used, a brass or aluminum. To supply the thermal patient directly with oxygen, switches 76 and 78 control the heater 72, so that the patient opens the valve controlling the oxygen flow of the gaseous 130 leaving the evaporation agent, so that pressurized liquid acidic oxygen is kept at a predetermined temperature - Substance through the tube 118 into the cap 116 and the temperature is maintained. The switch 78 is expediently arranged adjacent to the 35 a "superheater" heater 72 heated by the surrounding air, so that the temperature of the breathing apparatus, for example a (not shown), is effectively controlled and the Steam has not reached overheated oxygen mask. The flow regulating becomes what could happen if only one switch 76 valve 130 had an adjustment dial for the patient to use. 40 regulate the flow of gaseous oxygen

One the evaporation means 36 with the liquid can.

The pipe 80 connecting the line pipe 34 is opened by the container 90. To fill the source B , the container 90 is opened

a screw 82 provided with a bore is turned upside down, as in FIG. 4 shown, and kept in the direction of said parts. The upper part of the bore of the screw 82 shown in FIGS. 2 and 3 forms a "dead" gas source A , the first and second spaces, ie an air gap which prevents the connecting means C ₁ and C 1 C ₂ in hood 32 below iced up. The head of the screw 82 can be connected to one another in the manner described, the tube 70 of the liquid evaporation means 36 Then pressurized liquid acidic compound flows from the inner vessel 14 of the first source A In the two in FIGS. 2 and 3 automatically through the tube 34, the connection embodiments of the first source A , the means C and the tube 118 into the inner vessel 94. damping means 36 are interchangeable, and during the filling of the source B , steam is emitted the circuit which pressurizes the liquid is drained from the inner vessel 94 in order to increase the pressure according to FIG. 3 can also be used for the embodiment therein at a predetermined operating level according to FIG. 2 can be used. The in F i g. 2. This steam flows through an exhaust pipe 124, which is a preferred embodiment which is simpler and connects this to the neck pipe 100 and is more practical to use, but in the neck pipe extension 126 in the channel 102 and in some cases the embodiment according to FIG G. 3 to be preferred there by the cap 116 and the on the connectors. For example, if there are no fittings attached to the medium C in the atmospheric pressure, saturated liquid oxygen to the 60 sphere. A tear plate 128 is provided with the cap 116, so a pressure-generating circuit is connected which prevents damage to the internal object. 3 required. fäßes94 prevented by overpressure. At the beginning T ^. . ^ c ^ ,, "During the filling process, some liquid oxygen can _{flow into the second oxygen source, the} evaporation means 120, but since this is as shown in FIG. 4, if the two source B 65 connected to it, the flow regulating valve, a protective cover 88 and a storage container 90, 130 does not open, this quickly stops due to the pressure of its outer jacket 92 at a distance from an increase in the evaporation means 120. inner vessel 94 is arranged so that between- When filling the liquid oxygen flows to the

End opposite the outlet of the tube 118. During the filling of the source B, steam is drawn through the inner vessel 94. A shut-off valve 158 connected to the valve housing 142, the valve 146, the magnet extension 126 of the tube protects the relief valve 160 and the gas discharge a liquid level diffuser 162 arranged in it. The operation of this part of the first sensing thermistor 134. When the 5 connection means rises, a part of the liquid gets written below be-liquid level.

through holes provided in the shield 132. The second connecting means C ₂ are connected to the (not shown) into this. If it touches the top of the cap 116 of the source B connected thermistor 134, this causes a in the (Fig. 4). They comprise a double valve assembly connecting means C arranged solenoid valve 164, consisting of the valve housings 166 and 168, is de-energized and the steam exhaust from the inner vessel 94, which are attached to the threaded parts 170 and 172 , prevents the pressure in this end in the cap 116 is screwed in. A vessel rises to a sufficient height and no guide frame 174 is connected to the part 170. Further liquid can get into it. the. The valve housing 166 is designed in such a way that when the filling process is completed, the source B 15 is removed from the source A by a spring-loaded valve 176 which is enclosed by it and the container 90 is tensioned when it is displaced from a valve in the circuit shown in FIG. 4 again reversely seat 178 in the valve housing 166 a fluid reverses. The connection with its interior remains in this and in the filling layer. The valve exhaust pipe 124 always in the steam space of the inner housing 168 is designed accordingly. Vessel 94. This prevents liquid from escaping through the 20 The valve housing 168 is part of the gas vent-vent line, which is of the utmost importance to the second source system and is only needed since the second source is intended to be taken from one of the sources A and B to be carried to the patient moving fluid, and connected to each other. While the fill is therefore relatively small (about 725 g available from the second source, steam flows from the internal liquid oxygen). With this small size 25 ren vessel 94 through the discharge pipe 124, the supply would any loss of liquid be very disadvantageous, furthermore _? . approximately channel 102 and the interior of the cap 116 in the would be a risk that, in deviation from liquid 'valve housing 168 and the valve 146 on the oxygen through the discharge line of the patient \' incurs primary source A fixed first Verbindungsmit-frostbite. j # tel C ₁ . The function of this section of the second

- ",,.,. , 30 fasteners are detailed below

The lanyards wrote.

The first connecting means C ₁ are to put the secondary source on the upper

upper part of cap 30 (Fig. 2) or the cap portion of the primary source for the purpose of fluid 32 (Fig. 3) connected to the first source. In order to transfer it, the secondary source will be held upside down by a double valve arrangement 138, which is provided with a line so that it does the in FIG. 4 position shown units 38 and 39 is connected. This valve arrangement, and the second connecting means C ₂ , comprises two valve housings 140 and 142, the latter of which are placed on the first connecting means C ₁ . Each one has a valve and a guide frame 148. the guide pins 180 of the guide frame are held. Since both valves are the same, only valve 148 of the first connecting means (FIGS. 2 and 3) 144 is shown in detail in FIGS. 2 and 3 and described 40 through the openings 182 in the guide frame. (In FIG. 3 the housing 142 lies behind 174 the second connecting means (FIG. 4) prevent housing 140 and is therefore not visible.). 144 consists of a threaded part and means of a bolt 186 two each combiner having two prongs star nut on which a shaft 154 is rotatably mounted head with valve provided lever 184 (only partially visible) with-the valve on the guide frame 148th The valve 144 is mounted in the housing 140-45 (Fig. 2) so that the bolt 188 attached to the valve head supporting stem frame 174 engages 154 (Fig. 2) and a spring-loaded valve member engages 154, when the two sections are properly seated 156 together the interior of the valve housing 140 and the are seated so that they hold tightly together. When line 38 connect to each other and the liquid arrangement of these two sections get control of the keitsstrom between the two. 50 valve housings 166 and 168 into valve housings 140

If the first source A is used to fill the second and 142, and when mooring the corresponding source B is used with liquid oxygen, the valve requires moving valves out of their seats through the pipe 34 around the valve so that they let through liquid, the head-supporting shaft 154 and through the After the two sources have been linked in the befe- at the second source B 55 together so verVentilsitz 156, the liquid from the connecting means stigten C ₂ can. The first source primary source will flow into the secondary source. Because it is used in the manner described to supply a pressure difference between the containers 10 with gaseous oxygen, so and 90 the liquid flows immediately into the container, the upper part of the liquid transfer pipe 90. However, the pressure in this rises almost as well by contact between the valve stem 154 60 rapidly to the point where the required pressure and valve seat 156 difference from atmosphere is canceled. Closed to this pressure increase. As can be seen, the source A can counteract this, the relief valve 160 will deliver gaseous oxygen at the same time and the (Fig. 2) is set so that it is supplied with a low source B with liquid oxygen. Pressure of, for example, 0.7 atü below the operating

The valve housing 142 (Fig. 2) is part of the 65 pressure of the container 10 opens and excess gas evacuation system of the source B and, as such, is used only when the two sources A and B are connected to the means C can escape into the atmosphere. As long as fluid transmissions are interconnected. the liquid level in the container 90 below that

Thermistor 134 is at a standstill, solenoid valve 158 remains open releasing excess steam through relief valve 160. However, when the level reaches thermistor 134, solenoid valve 158 becomes ineffective (closes) so that the pressure in container 90 rises to the top where the fluid transfer stops. When it is over, the two sources can be separated from each other.

During the filling process, the vapors flowing through the relief valve 160 escape into the atmosphere through the gas diffuser 162. This diffusion is useful because it avoids a dangerous increase in the oxygen content of the air around the device and relieves the patient of any worries. Another advantage of filling under pressure is that the vapor discharge line is connected to the primary source A. This also allows the solenoid valve 158, the relief valve 160, and the diffuser 162 to be attached to the stationary primary source A , thereby reducing the weight and size of the portable secondary source.

Claims (3)

Patent claims: 1. Device for generating gaseous oxygen for inhalation, consisting of two double-walled thermally insulated storage containers for liquefied oxygen, each of which is provided with a line for filling in the liquid oxygen, and with means for connecting the two containers, characterized in that these means for connecting the two containers consist of two valve groups (138, 164) which are connected to the closure parts (30, 114, 116) of the two containers, one valve group (138) consisting of two identical valves (144, 146) , which are arranged in two housings (140, 142) , each with a vapor-permeable carrier device as a carrier for a shaft (154) with a valve plate which is in contact within the housing with a valve seat held under tension by a spring, one of the two Valves connected to the liquid line (38, 34), the other to the vent line (39, 158, 160) , and the two te valve group (164) has two identical valve housings (166, 168) each containing a valve disc (176) movable by means of a spring and a fixed valve seat (178) , one of the two valves with the liquid line (118), the others are connected to the steam line (116, 102, 124) in such a way that when the second container (B) is placed in an inverted position on the first container (A), the valves connected to the liquid lines and the valves connected to the steam lines match one another, the valve disc (176) held under tension by a spring being urged away from the valve seat (178 ) by the stem (154) , and the valve seat (156) being urged away from the stem (154) by the housing (166, 168). 2. Apparatus according to claim 1, characterized in that the vent line of the second container (B) contains a cap (116) which is connected to the valve housing (166) and to the upper end of the access line (102) , which is a double-walled tube (100) is formed, which leads concentrically around the liquid line (118) only partially into the container (B) , the upper parts of the inner and outer walls of the tube (100) and the outer and inner walls of the second container ( B) are connected in a gas-tight manner, and the lower parts of the double-walled tube are connected to one another in a gas-tight manner and have a tubular projection (126) which connects a ventilation tube (124) arranged in the vapor space of the second vessel (B ) to the line (102). 3. Apparatus according to claim 1 or 2, characterized in that a valve (158 ) arranged in the vent line of the first container (A ) is actuated by a liquid sensor (134) which is located in the second container (B) within a shield (132 ) is attached to the tubular projection (126) . For this purpose 2 sheets of drawings