This invention generally relates to a field of oxygenator, and in particular
to a method and an apparatus that is capable of generating and delivering medical
grade oxygen.
BACKGROUND
[0002] The subject matter discussed in the background section should not be
assumed to be prior art merely as a result of its mention in the background section.
Similarly, a problem mentioned in the background section or associated with the
subject matter of the background section should not be assumed to have been
previously recognized in the prior art. The subject matter in the background
section merely represents different approaches, which in and of themselves may
also correspond to implementations of the claimed technology.
[0003] Oxygen is used in the refining and fabrication of steel and other metals, as
well as in chemicals, medicines, petroleum processing, glass and ceramic
manufacturing, and pulp and paper manufacturing. Further, the oxygen is utilized
in municipal and industrial effluent treatment plants and facilities to safeguard the
environment. It can be noted that affordable and long-term access to oxygen has
been a significant concern in low- and middle-income nations since the outbreak
of COVID-19. The COVID-19 has put enormous strain on health systems, with
many hospitals running out of oxygen, leading to avoidable fatalities and families
of hospitalised patients paying a premium for limited oxygen supply.
[0004] Typically, the moderately ill Covid patients require 4 to 6 lpm oxygen
supply and patients with more severe hypoxia need 10 lpm and more. Therefore,
for such types of patients, adequate ventilator support is crucial for patient survival
in severe Covid disease. Such ventilators are operated with pressurized oxygen
and air. It can be noted that adjustable flow rate and pressure of the oxygen supply
is a key in oxygen therapy.
[0005] There are numerous ways to generate and deliver concentrated oxygen for
use in medical applications, chemicals, glass and ceramic manufacture, laser
cutting, electronic industries, fisheries, and in many other applications. An oxygen
generator, liquid oxygen and oxygen cylinders, etc. are oxygen sources. Among these,
oxygen generators are the best suitable due to their onsite oxygen generation
capability. The oxygen generators produce concentrated oxygen from air through
PSA (pressure swing adsorption) technology using molecular sieve adsorbents
such as 5A type, 13X type, Li-X type, etc.
[0006] Therefore, there is a need for an improved oxygen generator that is capable
10 of supplying medical grade oxygen directly to ventilators or patients, and also
eliminate the need for high adsorption pressures and high power compressors as
needed by large PSA (pressure swing adsorption) plants. Numerous prior arts
disclose various methods for generating oxygen.
[0007] WO2019202390A1 discloses a portable oxygen concentrator. The portable
15 oxygen concentrator may comprise an input configured to receive airflow, an input
filter, a compressor configured to compress airflow, a first column comprising a
first adsorbent bed, and a second column adjacent to the first column and
comprising a second adsorbent bed. The portable oxygen concentrator may further
comprise a first output configured to release oxygen to a user, and a second output
configured to release waste gas. The first and second adsorbent beds may
comprise a plurality of zeolites.
[0008] WO2021183903A1 discloses a portable oxygen delivery system including
an oxygen concentrator having a housing, a compressor mounted inside the
housing, a sieve module located within the housing and in fluid connection with
the compressor, the sieve module containing a zeolite for removing Nitrogen from
air through a pressure swing adsorption process for creating concentrated oxygen,
a power source attached to the housing and an oxygen controller device for
electronically controlling the pressure swing adsorption process. The portable
oxygen delivery system also preferably includes a blowing apparatus fluidly
30 connected to the oxygen concentrator having a blower housing, a blower motor
mounted inside the blower housing, a blower fan connected to the blower motor, a
second power source attached to the blower housing and a blower controller
device for electronically controlling the blower.
[0009] However, the prior arts do not disclose a method of generating high
pressure oxygen at adjustable flow rate by assembling low pressure oxygen
concentrators. Therefore, there is the need for high purity oxygen in modern
industrial manufacturing for a variety of purposes such as refining and fabrication
of steel and other metals, as well as in chemicals, medicines, petroleum
processing, glass and ceramic manufacturing, and pulp and paper manufacturing
etc.
OBJECTIVES OF THE INVENTION
[0010] It is an objective of the invention to configure an apparatus that is capable
of generating medical grade oxygen.
[0011] It is another objective of the invention to configure an apparatus that is
directly connected to the medical oxygen supply line in a hospital for operation of
anaesthetic machines, ventilators and direct oxygen supply to the patients.
[0012] It is yet another objective of the invention is to configure an apparatus that
is capable of regulating oxygen supply based on the outlet oxygen consumption to
save the operating energy costs.
[0013] It is yet another objective of the invention is to configure an apparatus that
consumes much lower power compared to the large oxygen PSA (pressure swing
adsorption) plants.
[0014] It is yet another objective of the invention to configure an apparatus that is
simple and easier for repair and service.
[0015] It is yet another objective of the present invention apparatus described in the
present work that is applicable in the fields of medical oxygen supply, commercial
fish farming, glass manufacturing, food/beverage industries, sewage and waste
water treatment, drinking water, mining, paper and pulp industries and metallurgy.
SUMMARY
[0016] According to an aspect, the present embodiments disclose a modular
oxygen apparatus includes a pre-air filter, an oil-free compressor, a first heat
exchanger, a plurality of adsorber beds, an oxygen collection tank, and a first flow
meter. The pre-air filter is used to filter an ambient air having a predefined
atmospheric pressure into a filtered air. The oil-free compressor coupled to the
pre-air filter, and configured to compress the filtered air into a compressed air by
reducing a volume of the filtered air. The first heat exchanger coupled to the oil10 free compressor, and configured to remove heat from the compressed air. The
plurality of adsorber beds configured to receive the compressed air by passing
through a micron filter and a plurality of feed valves. The plurality of adsorber
beds comprises an adsorbent material that is configured to separate molecules
present in the compressed air by selectively adsorbing nitrogen molecules and
releasing oxygen and argon molecules collected at a top of the plurality of
adsorbent beds to obtain a low pressure enriched oxygen at 10 litre per minute
(lpm). The oxygen collection tank configured to collect the low pressure enriched
oxygen received from the plurality of adsorber beds at 10 litre per minute (lpm) by
a plurality of orifices. The first flow meter coupled to the oxygen collection tank
by a pressure regulator, the first flow meter is coupled to a bacteria filter
configured to remove trap bacteria and viruses from low pressure enriched
oxygen. The plurality of adsorbent beds is regenerated by depressurization to
atmospheric pressure by timely controlling a plurality of exhaust valves connected
to a sound absorbing muffler.
[0017] In one embodiment, the bacteria filter is configured to trap bacteria and
viruses to ensure prevention of any cross-contamination in the generated oxygen.
In one embodiment, the first flow meter is configured to measure amount of
oxygen generated and regulated by the pressure regulator. In one embodiment, the
plurality of feed valves and the plurality of exhaust valves are connected to the
plurality of adsorber beds to regulate compressed air into sieve beds. In one
embodiment, the pre-air filter along with the oil-free compressor are arranged to
provide a high quality air. In one embodiment, the plurality of feed valves is
blocked to perform an exhaust function.
[0018] In another embodiment, the modular oxygen apparatus further includes a
low pressure oxygen tank, a booster compressor, an electric pressure release valve,
a pressure switch, and a high pressure oxygen product tank. The low pressure
oxygen tank configured to collect the low pressure enriched oxygen at 10 litre per
minute (lpm) from the oxygen collection tank by passing the oxygen from the
pressure regulator and the first flow meter. The booster compressor coupled to the
low pressure oxygen tank by a second flow meter, the booster compressor
configured to compress the low pressure enriched oxygen to deliver the oxygen at
high pressure by dissipating the heat from a second heat exchanger to the
atmosphere. The electric pressure release valve coupled to the booster compressor
by the second heat exchanger to release the trapped gas inside the booster
compressor in a piston cylinder to prevent heating of the booster compressor and
prevent delay at the booster compressor. The pressure switch coupled to the
second heat exchanger by a non-returning valve, the pressure switch is configured
to cut-in and cut-off a power of the modular oxygen apparatus. The high pressure
oxygen product tank coupled to the pressure switch to store the enriched oxygen at
a pressure of 5 bar to supply the enriched oxygen to a ventilator. The pressure
switch coupled with a pressure gauge to monitor an output pressure of the booster
compressor by the second heat exchanger, the pressure switch cut-in when the
pressure in the high pressure oxygen product tank reaches 4 bar pressure and cutoff when the pressure in the high pressure oxygen product tank reaches 5 bar
pressure to maintain constant pressure inside the high pressure oxygen product
tank.
[0019] In one embodiment, the electric pressure release valve coupled to the
booster compressor by the second heat exchanger to safeguard the booster
compressor at the time of starting of the modular oxygen apparatus. In one
embodiment, the non-returning valve coupled to the second heat exchanger, and
7
configured to separate pressure swing adsorption (PSA) section and manifold
section. In one embodiment, the pressure switch performs cut-in and cut-off
function by a miniature circuit breaker along with a relay switch.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings illustrate various embodiments of systems,
methods, and embodiments of various other aspects of the disclosure. Any person
with ordinary skills in the art will appreciate that the illustrated element
boundaries (e.g. boxes, groups of boxes, or other shapes) in the figures represent
one example of the boundaries. It may be that in some examples one element may
be designed as multiple elements or that multiple elements may be designed as one
element. In some examples, an element shown as an internal component of one
element may be implemented as an external component in another and vice versa.
Furthermore, elements may not be drawn to scale. Non-limiting and nonexhaustive descriptions are described with reference to the following drawings.
The components in the figures are not necessarily to scale, emphasis instead being
placed upon illustrating principles.
[0021] FIG. 1 illustrates a modular oxygen apparatus (i.e. modular oxygen
concentrator apparatus) producing low pressure enriched oxygen, according to an
embodiment;
[0022] FIG. 2 illustrates a modular oxygen apparatus (i.e. modular oxygen
generator apparatus) for controlled release of generated high pressure oxygen,
according to another embodiment;
[0023] FIG. 3 illustrates a wiring diagram of the modular oxygen generator
apparatus with variable flow and pressure control for oxygen supply, according to
an embodiment;
[0024] FIG. 4 illustrates a front view of the modular oxygen concentrator
apparatus (i.e. low pressure oxygen concentrator) , according to an embodiment;
[0025] FIG. 5 illustrates a top view of the FIG. 4, according to an embodiment;
[0026] FIG. 6 illustrates a side view of the FIG. 4, according to an embodiment;
[0027] FIG. 7 illustrates an assembled view of the modular oxygen generator
apparatus with variable flow and pressure control for oxygen supply known as
OxyMan, according to an embodiment;
[0028] FIG. 8 illustrates a front view of the OxyMan, according to an
embodiment;
[0029] FIG. 9 illustrates a side view of the OxyMan, according to an embodiment;
and
[0030] FIG. 10 illustrates a back view of the OxyMan, according to an
embodiment.
DETAILED DESCRIPTION

[0031] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words “comprising,” “having,” “containing,” and “including,” and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items.
[0032] It must also be noted that as used herein and in the appended claims, the singular forms “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise. Although any systems and methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the preferred, systems and methods are now described.
[0033] Embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings in which like numerals represent like elements throughout the several figures, and in which example embodiments are shown. Embodiments of the claims may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The examples set forth herein are non-limiting examples and are merely examples among other possible examples.
[0034] FIG. 1 illustrates a modular oxygen apparatus (100) (i.e. modular oxygen concentrator apparatus) producing low pressure enriched oxygen, according to an embodiment. The modular oxygen apparatus (100) (i.e. the modular oxygen concentrator apparatus) corresponds to a low pressure oxygen generating concentrator. The modular oxygen concentrator apparatus (100) includes, may not be limited to, a pre-air filter (102), an oil-free compressor (104), a first heat exchanger (106), a micron filter (108), a plurality of feed valves (110, 112) , a timely controlled plurality of exhaust valves (114, 116), a sound absorbing muffler (118), a plurality of adsorber beds (120, 122), a plurality of orifices (124, 126), an oxygen collecting tank (128), a pressure regulator (130), a bacteria filter (132), and a first flow meter (134).
[0035] The modular oxygen concentrator apparatus (100) (i.e. low pressure oxygen generating concentrator) includes the pre-air filter (102) used to filter an ambient air. The ambient air may enter through the pre-air filter (102). The ambient air is filtered by passing the atmospheric air through the pre-air filter (102) and results into a filtered air. Further, the pre-air filter (102) catch particulates and pollutants such as dust, mold, pet dander and fungal spores.
[0036] The modulator oxygen concentrator apparatus (100) includes the oil-free air compressor (104) coupled after the pre-air filter (102). The oil-free air compressor (104) is used to compress the filtered air. Further, the filtered air is forced through an opening in a tank configuring body of the oil-free air compressor (104), where pressure builds up. The oil-free compressor (104) may enforce a high pressure on the filtered air by reducing a volume of an inlet of the oil free compression (104). Thereafter, a compressed air is produced. In one embodiment, the oil-free air compressor (104) may eliminate a contamination issue of the compressed air when pressurized. Further, the oil-free compressor (104) may eliminate mixing of a lubricant inside the compressed air. The lubricant is eliminated when a heat is produced during compression of the compressed air and evaporates the lubricant.
[0037] Further, the compressed air from an outlet of the oil-free compressor (104) outlet is passed through the first heat exchanger (106). In one example, the first heat exchanger (106) works on a simple principle of second law of thermodynamics states that heat flows from one body to another body in respect of their temperature difference. The first heat exchanger (106) is utilized to dissipate heat into atmosphere, generated while compressing the filtered air.
[0038] Further, the compressed air may enter into the micron filter (108). The micron filter (108) may conduct a physical filtration on the compressed air. The micron filter (108) may include a special pore-sized cartridge. Further, the compressed air is filtered by passing a contaminated air through the special pore-sized cartridge to separate out suspended particles from the compressed air.
[0039] After the physical filtration, the compressed air is then fed to the plurality of adsorber beds (120, 122) by passing the compressed air from the plurality of feed valves (110, 112). In one embodiment, the plurality of feed valves (110, 112) coupled to the plurality of adsorber beds (120, 122), in such a manner that the adsorber bed (120) is connected to the feed valve (110) and the adsorber bed (122) coupled to the feed valve (112), in order to allow the compressed air into the plurality of adsorber beds (120, 122) respectively. The plurality of feed valves (110, 112) is operated by using a developed circuit board. The plurality of adsorber beds (120, 122) are filled with an adsorbent material of Lithium Zeolite compounds which is used as adsorbent, at high pressure. The adsorbent material, lithium zeolite, preferentially adsorbs nitrogen over oxygen. The adsorbent material is regenerated by performing a depressurization/desorption step.
[0040] Further, the plurality of adsorber beds (120, 122) filled with the adsorbent material separates the compressed air by selectively adsorbing nitrogen molecules and facilitates the oxygen and argon molecules to pass through the plurality of adsorber beds (120, 122). As a result, the oxygen is collected as a desired product at the top of the plurality of adsorber beds (120, 122). During this production step, the plurality of adsorber beds (120, 122) is regenerated by depressurization the plurality of adsorber beds (120, 122) to atmospheric pressure through a timely controlled plurality of exhaust valves (114, 116). The plurality of exhaust valves (120, 122) is connected to the plurality of adsorber beds (120, 122) through one end and another end is connected to the sound absorbing muffler (118). The plurality of exhaust valves (114, 116) is installed in connection with the plurality of adsorber beds (120, 122) to provide a rapid exhaust of the compressed air. The plurality of feed valves (110, 112) is blocked or inoperable in order to perform exhaust function.
[0041] Further, the plurality of exhaust valves (114, 116) is connected to the sound absorbing muffler (118). The sound absorbing muffler (118) is used to configure tubes, channels, and holes which directs the atmospheric pressure and reduces exhaust pressure. The sound absorbing muffler (118) may silent an engine by reducing a sound pressure emitted. The sound absorbing muffler (118) not only just dampen sound, but combines sound waves and make them cancel out from one another.
[0042] Further, a cyclic operation of the plurality of adsorber bed (114, 116) viz. adsorption and desorption steps produce continues oxygen enriched product at low pressure.
[0043] The modular oxygen concentrator apparatus (100) (i.e. low pressure oxygen generating concentrator) produces concentrated oxygen from the compressed air through pressure swing adsorption (PSA) technology using molecular sieve adsorbents, Li-X. At high pressure, the adsorbent preferentially adsorbs nitrogen over oxygen and a depressurization/desorption step in which the adsorbent is regenerated by reducing the pressure in the adsorbent column to atmospheric pressure.
[0044] Further, the modular oxygen concentrator apparatus (100) (i.e. low pressure oxygen generating concentrator) includes the oxygen collecting tank (128). The oxygen collecting tank (128) is connected to the plurality of orifices (124, 126) that allows the oxygen to flow into the oxygen collecting tank (128). The oxygen collecting tank (128) is coupled to the pressure regulator (130). The pressure regulator (130) is used to keep an output pressure of the generated oxygen constant even, when an inlet pressure fluctuates. The oxygen collecting tank (128) deliver the oxygen at 10 litre per minute (lpm). The oxygen collecting tank (128) is connected to the bacteria filter (132). Successively, the bacteria filter (132) is connected to the first flow meter (134) to trap bacteria and viruses. Further, the bacteria filter (132) ensures prevention of any cross-contamination in the produced low pressure enriched oxygen. The first flow meter (134) connected to the oxygen collecting tank (128) by the pressure regulator (130) is arranged after the bacteria filter (132) for measuring the amount of the oxygen flowing through or around the first flow meter (134).
[0045] FIG. 2 illustrates a modular oxygen apparatus (200) (i.e. modular oxygen generator apparatus) for controlled release of generated high pressure oxygen, according to another embodiment. The modular oxygen generator apparatus (200) includes a low pressure oxygen tank (202), a second flow meter (204), a booster compressor (206), a second heat exchanger (208), an electric pressure release valve (210), a non-returning valve (212), a pressure switch (214), a pressure gauge (216), and a high pressure oxygen product tank (218).
[0046] The low pressure oxygen tank (202) is connected to a low pressure enriched oxygen from these 10 lpm oxygen concentrators (100). The low pressure enriched oxygen is stored in the low pressure oxygen tank (202). Further, these low pressure enriched oxygen is passed into the booster compressor (206) through the second flow meter (204). The booster compressor (206) compresses the low pressure enriched oxygen and delivers it at high pressure. As a result, a compressed high pressure oxygen is produced. The booster compressor (206) increase or amplify the oxygen pressure coming from an existing compression system by passing the low pressure enriched oxygen through additional compression stages. The existing compression system corresponds to the low pressure oxygen generating concentrator apparatus (100) of FIG. 1. Further, the booster compressor (206) is connected to the second heat exchanger (208). The second heat exchanger (208) is utilized to lower temperature of the compressed high pressure oxygen. In one example, the second heat exchanger (208) transfers heat between two fluids of a hot oxygen by passing another from another cooled fluid without any direct contact with the oxygen. Thus, delivering oxygen at 93+/-3% purity with adjustable flow rate and delivery pressure.
[0047] Further, the modular oxygen generator apparatus (200) includes the electric pressure release valve (210) configured to the booster compressor (206) by the second heat exchanger (208) to release a trapped gas inside the booster compressor (206) in a piston cylinder to prevent heating of the booster compressor (206) and prevent delay at the start of the booster compressor (206). The second heat exchanger (206) is connected to the pressure switch (214). The pressure switch (214) connected to the second heat exchanger (208) by a non-returning valve (212). The pressure switch (214) is configured to cut-in and cut-off a power of the modular oxygen generator apparatus (200).
[0048] Further, the pressure switch (214) is configured with the pressure gauge (216) to monitor an output pressure from the booster compressor (206) by the second heat exchanger (208). The pressure switch (214) cut-in when the pressure in the high pressure oxygen product tank (218) reaches 4 bar pressure and cut-off when the pressure in the high pressure oxygen product tank (218) reaches 5 bar pressure to maintain constant pressure inside the high pressure oxygen product tank (218). When the booster compressor (206) is at 4 bar, which is generally non-ideal condition for compressors to start, as the already trapped gas inside a piston creates load on the booster compressor (206) which is seen as heating of the compressor and delay in start of the booster compressors (206). To avoid such situation, an electric normally the electric pressure release valve (210) is connected at the booster compressor (206) outlet to safeguard the booster compressor (206). The electric pressure release valve (210) also electrically connected and controlled by the pressure switch (214).
[0049] Further, the modular oxygen generator apparatus (200) includes the non-returning valve (212) used to separate PSA (pressure swing adsorption) section and manifold section. The PSA (pressure swing adsorption) section includes the booster compressor (206) along with the flow meter (204), the second heat exchanger (208), the pressure switch (214), the pressure gauge (216) and the high pressure storage tank (216). The non-returning valves (NRV) (212) work by allowing high pressure oxygen to flow through them only in one direction. The non-returning valve (212) have two openings in a body of the valve (212). One from the two openings is used for high pressure oxygen to enter and other from the two openings is used for high pressure oxygen to leave and further entered into the high pressure oxygen storage tank (218). The high pressure oxygen product tank (218) configured to the pressure switch (214) to store the enriched oxygen at a pressure of 5 bar to supply enriched oxygen for a ventilator.
[0050] In one embodiment, an automated solution for the modular oxygen generator apparatus (200) to be operated based on an outlet oxygen consumption developed using the pressure switch (214). Further, the cut-in and cut-off pressures are adjusted using this pressure switch (214) thereby automatically power on or off to the modular oxygen generator apparatus (200) at constant pressure based on the oxygen supply requirement results in low power consumption and also provides break time for the apparatus components. The pressure switch (214) is a simple electromechanical device that is triggered by pressure to turn an electrical circuit on or off.
[0051] FIG. 3 illustrates a wiring diagram of the modular oxygen generator apparatus with variable flow and pressure control for oxygen supply, according to an embodiment. The electric wiring diagram includes a miniature circuit board (MCB) (302), a main power supply (304), a relay switch (306), the booster compressor (206), and the pressure switch (214). One terminal of the miniature circuit board (MCB) (302) is connected to a phase terminal of the main power supply (304) and another terminal is connected to a phase terminal of the relay switch (306). A phase terminal of the pressure switch (214) is connected to the phase terminal of the relay switch (306) and also the phase terminal of the relay switch (306) is connected to the phase terminal of the main power supply (304). The modular oxygen generator apparatus (200) of FIG. 2, operates based on the pressure switch (214), cut-in and cut-off pressures, i.e. for example, the cut-off pressure is 5 bar and cut-in pressure is 4 bar.
[0052] The modular oxygen generator apparatus (200) runs until the high pressure oxygen product tank (218) reaches 5 bar pressure. At 5 bar pressure, the pressure switch (214) turns down the power by making connection with a neutral terminal of the relay switch (306) and automatically turns on the power i.e. make connection to the phase terminal of the relay switch (306) only when the oxygen pressure reaches 4 bar due to the consumption at the outlet. At the cut-off pressure of 5 bar, the pressure switch (214) also turns down the power to electric pressure valve (210) and there by the trapped gas inside the booster piston and gas upto non-returning valve (212) is released to atmosphere. This avoids the booster compressor heating which occurs if the compressor is asked to start at high pressure when the pressure reaches the cut-in pressure.
[0053] In an exemplary embodiment, a modular design of 50 lpm high pressure (up to 5bar) oxygen generator using 10 lpm oxygen concentrators is easy to assemble, repair and service.
[0054] FIG. 4 illustrates a front view of the modular oxygen concentrator apparatus (100) (i.e. low pressure oxygen concentrator), according to an embodiment. FIG. 5 illustrates a top view of the FIG. 4, according to an embodiment. FIG. 6 illustrates a side view of the FIG. 4, according to an embodiment.
[0055] FIGS. 7-10 illustrate an assembled view, a front view, a side view, and a back view of a OxyMan (808) of the modular oxygen generator apparatus (200), according to an embodiment. FIG. 7 illustrates a stack of five modular oxygen generator (i.e. low pressure oxygen generating concentrator) placed in a metal frame (702). The stack of five modular oxygen generator corresponds to low pressure-oxygen generating concentrators. In one embodiment, an output of all the modular oxygen generator (100) is connected to produce a combined flow of high pressure enriched oxygen to a ventilator. The metal frame (702) is covered with a metal sheet. FIG. 8 illustrates, a front metal sheet (802) equipped with a display (804) for readings received from the IOT (Internet of things) enabled printed circuit board (PCB) of each low pressure oxygen concentrator units (100). The display (804) shows a data, such as, pressure, temperature, oxygen flow rate, oxygen concentration, humidity and ambient temperature of each low pressure oxygen concentrator. The high pressure output oxygen concentration and flowrate also can be read on the display. This real time data from IOT enabled PCBs is helpful in diagnosing the issues and repairing in minimal time. A side metal sheet (806) is also configured with a number of fans (902) to vent out heat released from the first heat exchanger (106) and the second heat exchanger (208). FIG. 8 illustrates, an air filter (1002) provided with a back metal sheet (808) to remove dust from a supplied air for cooling the OxyMan (808). The metal frame (702) configured with wheel (904) to move the OxyMan (808).
[0056] It should be noted that the structure in any case could undergo numerous modifications and variants, all of which are covered by the same innovative concept; moreover, all of the details can be replaced by technically equivalent elements. In practice, the components used, as well as the numbers, shapes, and sizes of the components can be whatever according to the technical requirements. The scope of protection of the invention is therefore defined by the attached claims.

CLAIMS

I/We Claim:

1. A modular oxygen apparatus (100, 200) comprising:
a pre-air filter (102) for filtering an ambient air having a predefined
atmospheric pressure into a filtered air;
an oil-free compressor (104) coupled to the pre-air filter (102), and
configured for compressing the filtered air into a compressed air by
reducing a volume of the filtered air;
a first heat exchanger (106) coupled to the oil-free compressor (104),
10 and configured for removing heat from the compressed air;
a plurality of adsorber beds (120, 122) configured for receiving the
compressed air by passing through a micron filter (108) and a plurality of
feed valve (110, 112), wherein the plurality of adsorber beds (120, 122)
comprises an adsorbent material that is configured for separating
molecules present in the compressed air by selectively adsorbing nitrogen
molecules and releasing oxygen and argon molecules collected at a top of
the plurality of adsorbent beds (120, 122) for obtaining a low pressure
enriched oxygen at 10 litre per minute (lpm);
an oxygen collecting tank (128) configured for collecting the low
20 pressure enriched oxygen received from the plurality of adsorber beds
(120, 122) at 10 litre per minute (lpm) by a plurality of orifices (124,
126); and
a first flow meter (134) coupled to the oxygen collecting tank (128)
by a pressure regulator (130), the first flow meter (134) is coupled to a
bacteria filter (132) configured for removing trap bacteria and viruses
from low pressure enriched oxygen,
wherein the plurality of adsorbent beds (120, 122) is regenerated by
depressurization to atmospheric pressure by timely controlling a plurality
of exhaust valves (114, 116) connected to a sound absorbing muffler
(118).
2. The modular oxygen apparatus (100, 200) as claimed in claim 1, wherein
the bacteria filter (132) is configured for trapping bacteria and viruses for
ensuring prevention of any cross-contamination in the generated oxygen.
3. The modular oxygen apparatus (100, 200) as claimed in claim 1, wherein
the first flow meter (134) is configured for measuring amount of oxygen
generated and regulated by the pressure regulator (130).
4. The modular oxygen apparatus (100, 200) as claimed in claim 1, wherein
the plurality of feed valves (110, 112) and the plurality of exhaust valves
(114, 116) are connected to the plurality of adsorber beds (120, 122) for
regulating compressed air into sieve beds.
5. The modular oxygen apparatus (100, 200) as claimed in claim 1, wherein
the pre-air filter (102) along with the oil-free compressor (104) are
arranged for providing a high quality air.
6. The modular oxygen apparatus (100, 200) as claimed in claim 1, wherein
the plurality of feed valves (110, 112) is blocked for performing an
exhaust function.
7. The modular oxygen apparatus (100, 200) as claimed in claim 1, further
comprising:
a low pressure oxygen tank (202) configured for collecting low
pressure enriched oxygen at 10 litre per minute (lpm) from the oxygen
collecting tank (128) by passing the oxygen from the pressure regulator
(130) and the first flow meter (134);
a booster compressor (206) coupled to the low pressure oxygen tank
(202) by a second flow meter (204), the booster compressor (206)
configured for compressing the low pressure enriched oxygen to deliver
the oxygen at high pressure by dissipating the heat from a second heat
exchanger (208) to the atmosphere;
an electric pressure release valve (210) coupled to the booster
compressor (206) by the second heat exchanger (208) for releasing the
trapped gas inside the booster compressor (206) in a piston cylinder to
prevent heating of the booster compressor (206) and prevent delay at the
booster compressor (206);
a pressure switch (214) coupled to the second heat exchanger (208)
by a non-returning valve (212), the pressure switch (214) is configured to
cut-in and cut-off a power of the modular oxygen generating apparatus
(100, 200); and
a high pressure oxygen product tank (218) coupled to the pressure
switch (214) for storing the enriched oxygen at a pressure of 5 bar for
supplying the enriched oxygen to a ventilator or gas pipeline of hospital
system,
wherein the pressure switch (214) coupled with a pressure gauge
(216) for monitoring an output pressure of the booster compressor (206)
by the second heat exchanger (208), the pressure switch (214) cut-in
when the pressure in the high pressure oxygen product tank (218) reaches
4 bar pressure and cut-off when the pressure in the high pressure oxygen
product tank (218) reaches 5 bar pressure to maintain constant pressure
inside the high pressure oxygen product tank (218).
8. The modular oxygen apparatus (100, 200) as claimed in claim 7, wherein
the electric pressure release valve (210) coupled to the booster compressor
(206) by the second heat exchanger (208) for safeguarding the booster

compressor (206) at the time of starting of the modular oxygen generating
apparatus (100, 200).
9. The modular oxygen apparatus (100, 200) as claimed in claim 7, wherein
the non-returning valve (212) coupled to the second heat exchanger (208),
and configured for separating pressure swing adsorption (PSA) section and
manifold section.
10. The modular oxygen apparatus (100, 200) as claimed in claim 7, wherein
the pressure switch (214) performs cut-in and cut-off function by a
miniature circuit breaker (302) along with a relay switch (306).