A PSA oxygen generation, emergency oxygen generation combined oxygen utilization system and oxygen utilization method

Abstract

A PSA oxygen generation, emergency oxygen generation combined oxygen utilization system and oxygen utilization method of the present invention include: a PSA oxygen generation group, an emergency oxygen generation group, a low-pressure buffer tank, an oxygen booster, a high-pressure oxygen storage tank, a filling device and a portable oxygen supply device; a low-pressure sensor is arranged on the low-pressure buffer tank; a high-pressure sensor is arranged on the high-pressure oxygen storage tank; an oxygen concentration monitor is arranged between the reversing valve of the oxygen delivery pipeline and the air outlet of the molecular sieve group; the master control module controls the working states of the PSA oxygen generation group and the oxygen booster through the monitoring and signal feedback of the low-pressure sensor, the high-pressure sensor and the oxygen concentration monitor. It has a small volume, high space utilization rate, and comes with multiple oxygen generation schemes, enabling the realization of an emergency oxygen supply scheme in case of special situations. Moreover, the system stores a certain amount of oxygen under normal circumstances for emergencies.

Description

Technical Field

[0001] The present invention relates to the field of oxygen supply, and particularly to a combined oxygen supply system for PSA oxygen generation and emergency oxygen generation. Background Art

[0002] Oxygen has always been important both in plain areas and plateau areas. In daily life, regular oxygen inhalation can relax the nerves, relieve nerve fatigue, improve the oxygen supply to the brain, and to a certain extent, regulate the functions of the brain nervous system. Regular oxygen inhalation will also reduce the stress responses of the respiratory system, circulatory system, digestive system, and nervous system to varying degrees.

[0003] At present, most of the oxygen supply systems on the market are made of containers, which are relatively large in size, inconvenient for transportation and installation, and there are still certain drawbacks in the supplementary oxygen equipment. If a malfunction occurs in the oxygen generation equipment during use, the repair cycle is long, the efficiency is low, and the cost is very high.

[0004] The operation mode of some oxygen generators on the market is continuous oxygen supply, that is, regardless of whether we inhale or not, the machine always outputs oxygen. The oxygen utilization rate of this oxygen supply method is relatively low and can only be used in the oxygen-using environment at home. If it is in places such as troops, hospitals, first aid stations, and sanatoriums in high-altitude areas or areas with underdeveloped transportation, the plan of centralized oxygen supply by using oxygen generators becomes unrealistic. Summary of the Invention

[0005] In order to alleviate or solve at least one aspect or at least one point of the above problems, the present invention is proposed.

[0006] A combined oxygen supply system for PSA oxygen generation and emergency oxygen generation of the present invention includes: a PSA oxygen generation group 1, an emergency oxygen generation group 2, a low-pressure buffer tank 3, an oxygen booster 4, a high-pressure oxygen storage tank 5, a filling device 8, and a portable oxygen supply device 7;

[0007] The oxygen outlet interfaces of the PSA oxygen generation group 1 and the emergency oxygen generation group 2 are connected in parallel and then connected to the inlet of the low-pressure buffer tank 3 through a first pipeline;

[0008] The outlet of the low-pressure buffer tank 3 is connected to the inlet of the oxygen booster 4 through a second pipeline, and the outlet of the oxygen booster 4 is connected to the inlet of the high-pressure oxygen storage tank 5 through a third pipeline;

[0009] The outlet of the high-pressure oxygen storage tank 5 is communicated with the filling device 8;

[0010] The filling device 8 is used to fill high-pressure oxygen into the portable oxygen supply device 7;

[0011] The emergency oxygen generation group is a chemical oxygen generation group.

[0012] Preferably, it further includes a master control module, which is respectively connected to the PSA oxygen generation group 1, the emergency oxygen generation group 2, the low-pressure buffer tank 3, the oxygen booster 4, and the high-pressure oxygen storage tank 5 for control connection.

[0013] Preferably, the PSA oxygen generation group 1 is composed of a compressor 11, a switching valve 12, and a molecular sieve group 13; the molecular sieve group 13 includes a molecular sieve tower a 131 and a molecular sieve tower b 132;

[0014] The switching valve 12 includes an air inlet 121, an air outlet a 122, an air outlet b 123, and a return air port 124;

[0015] The air inlet 121 of the switching valve 12 is communicated with the air outlet of the compressor 11;

[0016] The switching valve can be switched between a first working state and a second working state;

[0017] In the first working state, the air outlet a 122 of the switching valve 12 is communicated with the air inlet end of the molecular sieve tower a 131, and the air inlet end of the molecular sieve tower b 132 is communicated with the return air port 124;

[0018] In the first working state, the air outlet a 122 of the switching valve 12 is communicated with the air inlet end of the molecular sieve tower a 131; the air outlet b 123 of the switching valve 12 is communicated with the air inlet end of the molecular sieve tower b 132 and the return air port 124;

[0019] In the second working state, the air outlet b 123 of the switching valve 12 is communicated with the air inlet end of the molecular sieve tower b 132, and the air outlet a 122 of the switching valve 12 is communicated with the air inlet end of the molecular sieve tower a 131 and the return air port 124.

[0020] Preferably, check valves 151 are provided at the air outlet ends of the molecular sieve tower a 131 and the molecular sieve tower b 132, a reversing valve 153 is provided on the oxygen delivery pipeline 15, the air outlet of the reversing valve 153 is communicated with the low-pressure buffer tank 3, and the return air port of the reversing valve 153 is communicated with the exhaust pipeline 152.

[0021] Preferably, a low-pressure sensor 31 is provided on the low-pressure buffer tank 3; a high-pressure sensor 51 is provided on the high-pressure oxygen storage tank 5; an oxygen concentration monitor 154 is provided between the reversing valve 153 of the oxygen delivery pipeline 15 and the air outlet of the molecular sieve group 13; the master control module 6 controls the working states of the PSA oxygen generation group 1 and the oxygen booster 4 through the monitoring and signal feedback of the low-pressure sensor 31, the high-pressure sensor 51, and the oxygen concentration monitor 154.

[0022] Preferably, the emergency oxygen generation group 2 is a chemical agent oxygen generation group 2a; it includes an oxygen generation water tank 2a1, a chemical agent bin 2a2, and an oxygen filter box a 2a3;

[0023] The medicine storage bin 2a2 is connected to the oxygen - making water tank 2a1, and the oxygen filtering box a2a3 is used to filter the oxygen at the outlet of the oxygen - making water tank 2a1.

[0024] Preferably, the emergency oxygen - making group 2 is a chemical oxygen candle oxygen - making group 2b; the chemical oxygen candle oxygen - making group 2b includes an oxygen - making box 2b1, an oxygen candle body 2b2, a starter 2b3 and an oxygen filtering box b2b4;

[0025] The oxygen candle body 2b2 is placed inside the oxygen - making box 2b1; the starter is located outside the oxygen - making box and is connected to the oxygen candle body 2b2 through a wire; the oxygen filtering box b2b4 is placed at the air outlet position of the oxygen - making box 2b1 and is sealed with each other. The inside of the oxygen filtering box b2b4 is provided with a filter element 2b41, and the top is provided with an oxygen outlet joint b2b42.

[0026] The present invention also provides a combined oxygen - supply method for PSA oxygen - making and emergency oxygen - making, including the PSA oxygen - making and emergency oxygen - making combined oxygen - supply system described above, and the following steps:

[0027] Control the PSA oxygen - making group 1 to start and produce oxygen, with the oxygen supercharger 4 in the closed state; the emergency oxygen - making group 2 does not produce oxygen; when the PSA oxygen - making group 1 fails to produce oxygen, the emergency oxygen - making group 2 can be used to produce oxygen.

[0028] The oxygen concentration monitor 154 in the PSA oxygen - making group 1 monitors the oxygen concentration at the air outlet of the PSA oxygen - making group 1 in real - time. When the oxygen concentration is lower than 90%, the low - concentration oxygen is discharged; when the oxygen concentration reaches more than 90%, the qualified oxygen is transported into the low - pressure buffer tank 3.

[0029] After the oxygen enters the low - pressure buffer tank 3 for buffering, monitor the internal air pressure of the low - pressure buffer tank 3. When the internal pressure reaches the preset supercharging value, start the oxygen supercharger 4 to supercharge the oxygen inside the low - pressure buffer tank 3 and then input it into the high - pressure oxygen storage tank 5; when it is monitored that the air pressure in the low - pressure buffer tank 3 reaches the set maximum safety value, the PSA oxygen - making group 1 pauses oxygen production until the air pressure decreases, and then the PSA oxygen - making group 1 restarts oxygen production.

[0030] The oxygen supercharged by the oxygen supercharger 4 enters the high - pressure oxygen storage tank 5 for storage. When the pressure inside the high - pressure oxygen storage tank 5 reaches the preset high - pressure value, the operation of the oxygen supercharger 4 is turned off; when the oxygen is used and the internal pressure decreases, the oxygen supercharger 4 restarts to work.

[0031] Connect the portable oxygen - supply device 7 to the filling device 8 for oxygen filling. After the oxygen filling is completed, disconnect the connection.

[0032] Preferably, the following steps are further included: when the oxygen user uses oxygen, connect the oxygen-saving outlet 72 of the portable oxygen supply device 7 to the oxygen inhalation tube. During normal breathing, the oxygen-saving outlet 72 controls the opening and closing of the internal components through the micro-negative pressure generated by the oxygen user's inhalation to achieve synchronous breathing-triggered pulse oxygen supply.

[0033] The PSA oxygen generation, emergency oxygen generation combined oxygen use system and oxygen use method of the present invention are small in volume, high in space utilization rate, with multiple oxygen generation schemes, and can implement an emergency oxygen supply scheme in case of special situations. Moreover, the system stores a certain amount of oxygen under normal circumstances for emergencies.

[0034] In addition, the system also adds an oxygen-saving function during the use of oxygen. Only when we inhale can the oxygen start to supply, reducing the waste of continuous oxygen supply and increasing the more comfortable oxygen inhalation experience for the oxygen user.

[0035] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0036] First, the system of the present invention is small in size and high in space utilization rate.

[0037] Second, the system of the present invention adopts multiple oxygen generation schemes to cope with the problem of oxygen supply in case of sudden failures.

[0038] Third, the system of the present invention greatly reduces the technical limitations and costs of oxygen filling.

[0039] The problem of oxygen waste during use is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural block diagram of the PSA oxygen generation, emergency oxygen generation combined oxygen use system according to an exemplary embodiment of the present invention.

[0041] Figure 2 It is a schematic diagram of the principle of the PSA oxygen generation, emergency oxygen generation combined oxygen use system according to an exemplary embodiment of the present invention.

[0042] Figure 3 For Figure 2 an enlarged schematic diagram of the PSA oxygen generation group in

[0043] Figure 4 It is a three-dimensional schematic diagram of the PSA oxygen generation, emergency oxygen generation combined oxygen use system according to an exemplary embodiment of the present invention.

[0044] Figure 5 It is a structural schematic diagram of chemical agent oxygen generation according to an exemplary embodiment of the present invention.

[0045] Figure 6 It is a structural schematic diagram of chemical oxygen candle oxygen generation according to an exemplary embodiment of the present invention.

[0046] Figure 7 Schematic diagram of the working process of the PSA oxygen generation and emergency oxygen generation combined oxygen supply system for an exemplary embodiment of the present invention.

[0047] Wherein: 1 - PSA oxygen generation group, 11 - compressor, 12 - switching valve, 121 - air inlet, 122 - outlet a, 123 - outlet b, 124 - return air port, 13 - molecular sieve group, 131 - molecular sieve tower a, 132 - molecular sieve tower b, 14 - exhaust muffler, 15 - oxygen delivery pipeline, 151 - check valve, 152 - exhaust pipeline, 153 - reversing valve, 154 - oxygen concentration monitor;

[0048] 2 - emergency oxygen generation group, 2a - chemical agent oxygen generation group, 2a1 - oxygen generation water tank, 2a11 - tank body, 2a12 - feed port, 2a13 - oxygen outlet, 2a2 - chemical agent bin, 2a21 - oxygen generation agent bin, 2a22 - catalyst bin, 2a23 - discharge port, 2a24 - baffle plate, 2a25 - switch, 2a3 - oxygen filter box a, 2a31 - box body, 2a32 - filter element, 2a33 - oxygen outlet joint a, 2a34 - check valve, 2b - chemical oxygen candle oxygen generation group, 2b1 - oxygen generation box, 2b2 - oxygen candle body, 2b3 - starter, 2b4 - oxygen filter box b, 2b41 - filter element, 2b42 - oxygen outlet joint b;

[0049] 3 - low - pressure buffer tank, 31 - low - pressure sensor, 32 - overflow valve, 4 - oxygen booster, 5 - high - pressure oxygen storage tank, 51 - high - pressure sensor, 52 - high - pressure pressure relief mechanism, 6 - total control module, 7 - portable oxygen supply device, 71 - cylinder body, 72 - oxygen - saving outlet, 73 - high - pressure inflation joint, 8 - charger. Detailed implementation manners

[0050] The following description of the embodiments of the present invention with reference to the drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation on the present invention. In the present invention, the same reference numerals represent the same or similar components.

[0051] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. On the contrary, the examples provided herein are only to illustrate some of the many possible ways of implementing the methods, devices, and / or systems described herein, which will be apparent after understanding the disclosure of the present invention.

[0052] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or parts, these components, elements, regions, layers, or parts should not be limited by these terms. Instead, these terms are only used to distinguish one component, element, region, layer, or part from another component, element, region, layer, or part.

[0053] In the specification, when an element (such as a layer, region, or substrate) is described as "on" another element, "connected to" or "coupled to" another element, the element can be directly "on" the other element, directly "connected to" or "coupled to" the other element, or there can be one or more other elements therebetween. In contrast, when an element is described as "directly on" another element, "directly connected to" or "directly coupled to" another element, there can be no other elements therebetween.

[0054] The terms used herein are only for describing various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprising", "including", and "having" specify the presence of the recited features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0055] To enable those skilled in the art to use the content of the present invention, the following exemplary embodiments may be given in combination with specific application scenarios, parameters of specific systems, devices, and components, and specific connection manners hereinafter. However, for those skilled in the art, these embodiments are only examples, and the general principles defined herein can be applied to other embodiments and application scenarios without departing from the spirit and scope of the present invention.

[0056] According to an exemplary embodiment of the present invention: as Figures 1-6 shown, a PSA oxygen generation and emergency oxygen generation combined oxygen utilization system, as Figure 1 , shown in FIG. 4, includes a PSA oxygen generation unit 1, an emergency oxygen generation unit 2, a low-pressure buffer tank 3, an oxygen booster 4, a high-pressure oxygen storage tank 5, a total control module 6, and a portable oxygen supply device 7 that can be fixed on an equipment rack. The PSA oxygen generation and emergency oxygen generation combined oxygen utilization system is micro or small, and can also be called a combined oxygen supply system.

[0057] As Figure 2As shown, the oxygen outlet interfaces of the PSA oxygen generation group 1 and the chemical oxygen generation group 2 are connected in parallel and then connected to the inlet of the low-pressure buffer tank 3 through the first pipeline. The inlet of the oxygen booster 4 is connected to the outlet of the low-pressure buffer tank 3 through the second pipeline, and the outlet is connected to the inlet of the high-pressure oxygen storage tank 5 through the third pipeline. A filling device 8 is arranged at the outlet of the high-pressure oxygen storage tank 5, and the filling device 8 is used to fill high-pressure oxygen into the portable oxygen supply device 7.

[0058] As Figure 2 , as shown in Figure 3, the PSA oxygen generation group 1 of the present invention includes a compressor 11, a switching valve 12 and a molecular sieve group 13. The switching valve 12 includes an inlet 121, an outlet a 122, an outlet b 123 and a return air port 124. The inlet 121 of the switching valve 12 is connected to the outlet of the compressor 11, and the outlet a 122 and the outlet b 123 of the switching valve 12 are respectively connected to the inlet ends of the molecular sieve towers a 131 and b 132 of the molecular sieve group 13.

[0059] The switching valve can be switched between a first working state and a second working state; in the first working state, in the first working state, the outlet a 122 of the switching valve 12 is communicated with the inlet end of the molecular sieve tower a 131; the outlet b 123 of the switching valve 12 is communicated with the inlet end of the molecular sieve tower b 132 and the return air port 124; that is, the inlet end of the molecular sieve tower b 132 is communicated with the outlet b 123 and then with the return air port 124.

[0060] In the second working state, the outlet b 123 of the switching valve 12 is communicated with the inlet end of the molecular sieve tower b 132, and the outlet a 122 of the switching valve 12 is communicated with the inlet end of the molecular sieve tower a 131 and the return air port 124. That is, the inlet end of the molecular sieve tower a 122 is communicated with the outlet a 122 and then with the return air port 124.

[0061] As Figure 2 , as shown in Figure 3, the outlet ends of the molecular sieve towers a 131 and b 132 are connected in parallel and then communicated with the low-pressure buffer tank 3 through the oxygen delivery pipeline 15; check valves 151 are arranged at the outlet ends of the molecular sieve towers a 131 and b 132, a reversing valve 153 is arranged on the oxygen delivery pipeline 15, the outlet of the reversing valve 153 is communicated with the low-pressure buffer tank, and the return air port of the reversing valve 153 is communicated with the exhaust pipeline 152. The other end of the exhaust pipeline 152 is connected to the return air port 124 of the switching valve 12.

[0062] As Figure 2As shown, the oxygen outlet joint a2a33 of the oxygen filter box a2a3 is connected to the low-pressure buffer tank 3 through a pipeline, and a one-way valve 2a34 is provided therebetween to prevent gas backflow.

[0063] As Figure 1 , shown in Figure 2, a low-pressure sensor 31 is provided on the low-pressure buffer tank 3 for monitoring the internal air pressure; a high-pressure sensor 51 is provided on the high-pressure oxygen storage tank 5 for monitoring the internal air pressure.

[0064] An oxygen concentration monitor 154 is provided between the reversing valve 153 of the oxygen delivery pipeline 15 and the air outlet of the molecular sieve group 13 for monitoring the oxygen concentration. The total control module 6 controls the working states of the PSA oxygen generation group 1 and the oxygen supercharger 4 through the monitoring and signal feedback of the low-pressure sensor 31, the high-pressure sensor 51 and the oxygen concentration monitor 154.

[0065] As Figure 1 , shown in Figure 2, the oxygen supercharger 4 can boost the oxygen with a pressure of 0.05 - 0.2 MPa in the low-pressure buffer tank 3 to 10 - 30 Mpa for storage. An overflow valve 32 is provided on the low-pressure buffer tank 3; a high-pressure pressure relief mechanism 52 is provided on the high-pressure oxygen storage tank 5. The overflow valve and the high-pressure pressure relief mechanism ensure the internal air pressure safety.

[0066] As Figure 1 , shown in Figure 2, the portable oxygen supply device 7 includes a bottle body 71, an oxygen-saving air outlet 72 and a high-pressure inflation joint 73; the oxygen-saving air outlet 72 is placed at the top of the bottle body 71. The oxygen-saving air outlet 72 controls the opening and closing of the internal components through the micro-negative pressure generated by the inhaler's inhalation to achieve synchronous breathing-triggered pulsed oxygen supply; the high-pressure inflation joint 73 is placed at the bottom of the bottle body 71 and is a high-pressure one-way intake structure. The charger 8 adopts a high-pressure quick-insert self-locking form and is connected to the high-pressure inflation joint 73 at the bottom of the portable oxygen supply device 7 for charging; when the charger 8 is connected to the high-pressure inflation joint 73, air is conducted, and the air flow is blocked after disconnection; the number of chargers 8 can be one or more, and multiple portable oxygen supply devices 7 can be charged simultaneously. The portable oxygen supply device 7 and the charger 8 adopt existing structures and will not be elaborated here.

[0067] According to an exemplary embodiment of the present invention, as Figure 5 shown, the emergency oxygen generation group 2 is driven without electric energy and is a chemical agent oxygen generation group 2a. It includes an oxygen generation water tank 2a1, a chemical agent bin 2a2 and an oxygen filter box a2a3. The oxygen generation water tank 2a1 includes a box body 2a11, a feed port 2a12 and an oxygen outlet 2a13 at the top. The chemical agent bin 2a2 is communicated with the oxygen generation water tank 2a1, and the oxygen filter box a2a3 is used to filter the oxygen at the outlet of the oxygen generation water tank 2a1.

[0068] The medicament bin 2a2 includes an oxygen - generating agent bin 2a21, a catalyst bin 2a22 and a discharge port 2a23; the oxygen - generating agent bin 2a21 and the catalyst bin 2a22 are separated by a partition, and are respectively communicated with the discharge port 2a23 through their respective openable and closable baffle plates 2a24. The feed port 2a12 of the oxygen - generating water tank 2a1 is hermetically connected to the discharge port 2a23 at the bottom of the medicament bin 2a2; the oxygen outlet 2a13 of the oxygen - generating water tank 2a1 is hermetically connected to the box body 2a31 of the oxygen filter box a2a3.

[0069] As Figure 5 shown, a recessed part is formed on the box body of the oxygen - generating water tank 2a1, and a plurality of holes are formed at the bottom of the recessed part, and the plurality of holes form the oxygen outlet 2a13 of the oxygen - generating water tank 2a1; the oxygen filter box a2a3 includes a box body 2a31, a filter element 2a32 and an oxygen outlet joint a2a33, a protruding part matching with the recessed part is formed at the bottom of the box body 2a31, and a plurality of holes are formed on the bottom surface of the protruding part.

[0070] As Figure 5 shown, the feed port 2a12 of the oxygen - generating water tank 2a1 is connected to the discharge port 2a23 at the bottom of the medicament bin 2a2 and is sealed around; the oxygen outlet 2a13 of the oxygen - generating water tank 2a1 is connected to the box body 2a31 of the oxygen filter box a2a3 and is sealed around. The oxygen - generating agent bin 2a21 and the catalyst bin 2a22 of the medicament bin 2a2 are arranged above the discharge port 2a23 and are arranged longitudinally side by side; a baffle plate 2a24 is provided between the bottoms of the oxygen - generating agent bin 2a21 and the catalyst bin 2a22 and the discharge port 2a23, and the opening and closing of the baffle plate 2a24 are mechanically controlled by a switch 2a25.

[0071] According to an exemplary embodiment of the present invention, as Figure 6 shown, in addition to the above - mentioned embodiment, the emergency oxygen - generating group 2 can also be a chemical oxygen candle oxygen - generating group 2b; the chemical oxygen candle oxygen - generating group 2b includes an oxygen - generating box 2b1, an oxygen candle body 2b2, a starter 2b3 and an oxygen filter box b2b4; the oxygen candle body 2b2 is placed inside the oxygen - generating box 2b1; the starter 2b3 is connected to the inside of the oxygen candle body 2b2 and is fixed on the outer box body of the oxygen - generating box 2b1.

[0072] The oxygen filter box b2b4 is placed at the air outlet position of the oxygen - generating box 2b1 and is sealed with each other. A filter element 2b41 is provided inside the oxygen filter box b2b4, and an oxygen outlet joint b2b42 is provided at the top.

[0073] As Figure 6 shown, a recessed part is formed on the box body of the oxygen - generating box 2b1, and a plurality of holes are formed at the bottom of the recessed part, and the plurality of holes form the oxygen outlet of the oxygen - generating box 2b1; the oxygen filter box a2a3 includes a box body 2a31, a filter element 2a32 and an oxygen outlet joint a2a33, a protruding part matching with the recessed part is formed at the bottom of the box body 2a31, and a plurality of holes are formed on the bottom surface of the protruding part.

[0074] According to an exemplary embodiment of the present invention, as Figures 1-7 shown, a method for combined oxygen production by PSA oxygen generation and emergency oxygen generation and oxygen utilization includes the following steps:

[0075] Step 1: Under normal circumstances, the system is powered on and starts working. The master control module 6 issues an instruction to start the PSA oxygen generation group 1 to start producing oxygen. The oxygen supercharger 4 is in a closed state, and the emergency oxygen generation group 2 does not produce oxygen.

[0076] Step 2: The intake port of the compressor 11 of the PSA oxygen generation group 1 obtains air from the outside. After being pressurized, the high-pressure air is communicated with one of the outlet ports a122 and the molecular sieve tower a131 through the intake port 121 of the switching valve 12, and the other outlet port b123 is communicated with the molecular sieve tower b132 and the return air port 124.

[0077] During the process of the high-pressure air entering the molecular sieve tower a131 and being pressurized to the adsorption pressure, it includes the intake pressurization of the high-pressure air and the reverse pressurization of the molecular sieve tower b132 to it. Among them, for 1 intake port and 2 outlet ports of the switching valve 12, during the switching process, there is a very short period of time when the 3 ports are communicated. At this time of communication, the gas in the molecular sieve tower with high pressure will inflate into the molecular sieve tower with low pressure, that is, reverse pressurization is formed.

[0078] After the pressure of the molecular sieve tower a131 reaches the adsorption pressure, the molecular sieve selectively adsorbs the nitrogen molecules in the high-pressure air, thereby separating oxygen and nitrogen. After the nitrogen molecules are adsorbed, the oxygen molecules flow out from the outlet of the molecular sieve tower a131. When the air pressure in the molecular sieve tower a131 reaches the set pressure value and the adsorbed nitrogen reaches a certain saturation, it enters the process of pressure reduction and desorption. Through the switching of the switching valve 12, the adsorbed nitrogen in the molecular sieve tower a131 is discharged through the return air port 124 of the switching valve 12, and at the same time, the molecular sieve tower a131 conducts a certain amount of reverse pressurization to the molecular sieve tower b132. This process is carried out alternately in cycles.

[0079] Step 3: The oxygen concentration monitor 154 in the PSA oxygen generation group 1 continuously monitors the oxygen concentration at the outlet of the molecular sieve group 13 and feeds back a signal to the master control module 6. When the oxygen concentration is lower than 90%, the master control module 6 controls the switching valve 153 to act, and discharges the low-concentration oxygen together with nitrogen through the exhaust pipeline 152 from the return air port 124 of the switching valve 12. When the oxygen concentration monitor 154 monitors that the outlet oxygen reaches more than 90%, it timely feeds back the signal to the master control module 6, controls the switching valve 153 to act, and conveys the qualified oxygen into the low-pressure buffer tank 3.

[0080] Step 4: After oxygen enters the low-pressure buffer tank 3 for caching, the low-pressure sensor 31 monitors the internal air pressure of the tank. When the internal pressure reaches the preset boosting value, the low-pressure sensor 31 feeds back a signal to the master control module 6. The master control module 6 issues an instruction to start the oxygen booster 4 to boost the oxygen inside the low-pressure buffer tank 3 and then input it into the high-pressure oxygen storage tank 5. When the low-pressure sensor 31 monitors that the air pressure in the pressure buffer tank 3 reaches the set maximum safety value, it feeds back a signal to the master control module 6. The master control module 6 issues an instruction to the PSA oxygen generation unit 1 to suspend oxygen generation until the internal air pressure decreases, and then the PSA oxygen generation unit 1 will restart oxygen generation.

[0081] Step 5: The oxygen boosted by the oxygen booster 4 enters the high-pressure oxygen storage tank 5 for storage. When there is no immediate use of oxygen, when the internal pressure of the high-pressure oxygen storage tank 5 reaches the preset high pressure value, the high-pressure sensor 51 will feed back a signal to the master control module 6. The master control module 6 issues an instruction to turn off the operation of the oxygen booster 4. When oxygen is used and the internal pressure decreases, the oxygen booster 4 restarts working.

[0082] Step 6: Connect the portable oxygen supply device 7 to the filling device 8 at the outlet end of the high-pressure oxygen storage tank 5 through the high-pressure inflation joint 73 at the bottom for oxygen filling. After oxygen filling is completed, simply disconnect the connection; the filling device 8 is in the form of a high-pressure quick-insert self-locking type, allowing air to pass through when connected to the high-pressure inflation joint 73, and blocking the air flow after disconnection; the system can simultaneously fill multiple portable oxygen supply devices 7.

[0083] Step 7: When the oxygen user uses oxygen, connect the oxygen-saving outlet 72 of the portable oxygen supply device 7 to the oxygen inhalation tube. During normal breathing, the oxygen-saving outlet 72 controls the opening and closing of the internal components through the micro-negative pressure generated by the oxygen user's inhalation to achieve synchronous breathing-triggered pulsed oxygen supply.

[0084] Step 8: When an abnormal situation occurs and the PSA oxygen generation unit 1 fails to generate oxygen, oxygen can be produced by the emergency oxygen generation unit 2 and continue to be supplied to the low-pressure buffer tank 3.

[0085] According to an exemplary embodiment of the present invention, the emergency oxygen generation unit (2) can produce oxygen through two embodiments;

[0086] ① Oxygen generation by chemical agent method: The oxygen generation water tank 2a1 of the chemical agent oxygen generation group 2a contains pure water. The two chambers of the agent bin 2a2 are respectively filled with oxygen generation agent and catalyst. When oxygen generation is required, the switch 2a25 is manually pressed, and the baffle plates 2a24 at the bottoms of the oxygen generation agent bin 2a21 and the catalyst bin 2a22 are opened. The oxygen generation agent and the catalyst fall off from the discharge port 2a23 and enter the oxygen generation water tank 2a1, dissolve and fuse in water, and start to produce oxygen. After the oxygen generation agent and the catalyst enter the oxygen generation water tank 2a1, the baffle plate 2a24 automatically resets and closes. Exemplarily, the baffle plate 2a24 can be hinged. One end can be hinged and fixed on the box body, and the other end is a free end that abuts against the baffle. The reset can use a torsion spring, and the torsion spring can be fixed on the hinge shaft to keep the baffle plate 2a24 in the initial position. The oxygen generated after the chemical reaction of the oxygen generation agent and the catalyst in water passes through the oxygen filter box a2a3, is filtered by the filter element 2a32, and is output from the oxygen outlet joint a2a33 and enters the low-pressure buffer tank 3.

[0087] ② Oxygen generation by chemical oxygen candle method: The oxygen generation box 2b1 of the chemical oxygen candle oxygen generation group 2b is equipped with an oxygen candle body 2b2. When oxygen generation is required, the starter 2b3 on the outer box body of the oxygen generation box 2b1 is manually pressed. The starter 2b3 is internally connected to the oxygen candle body 2b2, and the front end generates heat by friction with the metal powder fuel inside and starts a chemical reaction. The heat dissipated during the chemical reaction can cause the chlorate inside the oxygen candle body 2b2 to release oxygen; the oxygen passes through the oxygen filter box b2b4 at the outlet of the oxygen generation box 2b1, is filtered by the filter element 2b41, and is output from the oxygen outlet joint b2b42 and enters the low-pressure buffer tank 3.

[0088] The micro oxygen generation, storage, supply and conservation system and its implementation method of the present invention mainly include a PSA oxygen generation group, an emergency oxygen generation group, a low-pressure buffer tank, an oxygen booster, a high-pressure oxygen storage tank, a total control module, a portable oxygen supply device, etc. The total control module can detect and control each functional module group, and intelligently control the working states of the oxygen generation system and the boosting system by detecting the pressure, concentration and flow rate of the gas in the pipeline. The PSA oxygen generation group and the chemical agent oxygen generation group can generate oxygen in different ways. The output low-pressure oxygen enters the low-pressure buffer tank for temporary storage, can become high-pressure oxygen after passing through the oxygen booster, is stored in the high-pressure oxygen storage tank, and is filled into the portable oxygen supply device for the oxygen absorber to use. This system can realize various forms such as oxygen generation, storage, supply and conservation, can meet the oxygen supply requirements in different scenarios, has reliable performance, simple operation, low failure rate, and is an ideal device for medical oxygen generation in high-altitude areas or areas with underdeveloped transportation.

[0089] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, combinations of elements, can be made therein without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A combined oxygen supply system for PSA oxygen generation and emergency oxygen generation, characterized in that: Comprising: A PSA oxygen generation group (1), an emergency oxygen generation group (2), a low-pressure buffer tank (3), an oxygen booster (4), a high-pressure oxygen storage tank (5), a filling device and a portable oxygen supply device (7); The oxygen outlet interfaces of the PSA oxygen generation group (1) and the emergency oxygen generation group (2) are connected in parallel and then connected to the inlet of the low-pressure buffer tank (3) through a first pipeline; The outlet of the low-pressure buffer tank (3) is connected to the inlet of the oxygen booster (4) through a second pipeline, and the outlet of the oxygen booster (4) is connected to the inlet of the high-pressure oxygen storage tank (5) through a third pipeline; The outlet of the high-pressure oxygen storage tank (5) is communicated with the filling device (8); The filling device (8) is used to fill high-pressure oxygen into the portable oxygen supply device (7); The emergency oxygen generation group is a chemical oxygen generation group; It further includes a total control module, and the total control module is respectively connected to the PSA oxygen generation group (1), the emergency oxygen generation group (2), the low-pressure buffer tank (3), the oxygen booster (4), and the high-pressure oxygen storage tank (5) for control; The emergency oxygen generation group (2) is a chemical agent oxygen generation group (2a); it includes an oxygen generation water tank (2a1), a reagent bin (2a2), and an oxygen filter box a (2a3); the reagent bin (2a2) is communicated with the oxygen generation water tank (2a1), and the oxygen filter box a (2a3) is used to filter the oxygen at the outlet of the oxygen generation water tank (2a1); The reagent bin (2a2) includes an oxygen generation agent bin (2a21), a catalyst bin (2a22), and a discharge port (2a23); the oxygen generation agent bin (2a21) and the catalyst bin (2a22) are separated by a partition, and are respectively communicated with the discharge port (2a23) through their respective openable and closable baffle plates (2a24); the inlet (2a12) of the oxygen generation water tank (2a1) is hermetically connected to the discharge port (2a23) at the bottom of the reagent bin (2a2); the oxygen outlet (2a13) of the oxygen generation water tank (2a1) is hermetically connected to the box body (2a31) of the oxygen filter box (a2a3); A concave portion is formed on the box body of the oxygen generation water tank (2a1), and a plurality of holes are formed at the bottom of the concave portion, and the plurality of holes form the oxygen outlet (2a13) of the oxygen generation water tank (2a1); the oxygen filter box (a2a3) includes a box body (2a31), a filter element (2a32), and an oxygen outlet joint (a2a33), and a convex portion matching the concave portion is formed at the bottom of the box body (2a31), and a plurality of holes are formed on the bottom surface of the convex portion; 2. The oxygen system according to claim 1, wherein: The PSA oxygen generation group (1) comprises a compressor (11), a switching valve (12), and a molecular sieve group (13); the molecular sieve group (13) includes a molecular sieve tower a (131) and a molecular sieve tower b (132); The switching valve (12) includes an air inlet (121), an air outlet a (122), an air outlet b (123), and a return air port (124); The air inlet (121) of the switching valve (12) is communicated with the air outlet of the compressor (11); The switching valve can be switched between a first working state and a second working state; In the first working state, the air outlet a (122) of the switching valve (12) is communicated with the air inlet end of the molecular sieve tower a (131); the air outlet b (123) of the switching valve (12) is communicated with the air inlet end of the molecular sieve tower b (132) and the air return port (124). In the second working state, the air outlet b (123) of the switching valve (12) is communicated with the air inlet end of the molecular sieve tower b (132); the air outlet a (122) of the switching valve (12) is communicated with the air inlet end of the molecular sieve tower a (131) and the air return port (124).

3. The oxygen system according to claim 2, wherein: The air outlet ends of the molecular sieve tower a (131) and the molecular sieve tower b (132) are connected in parallel and then communicated with the low-pressure buffer tank (3) through the oxygen delivery pipeline (15).

4. The oxygen-using system according to claim 3, characterized in that: One-way valves (151) are provided at the air outlet ends of the molecular sieve tower a (131) and the molecular sieve tower b (132). A reversing valve (153) is arranged on the oxygen delivery pipeline (15). The air outlet of the reversing valve (153) is communicated with the low-pressure buffer tank (3), and the air return port of the reversing valve (153) is communicated with the exhaust pipeline (152).

5. The oxygen-using system according to claim 4, wherein: A low-pressure sensor (31) is arranged on the low-pressure buffer tank (3); a high-pressure sensor (51) is arranged on the high-pressure oxygen storage tank (5); an oxygen concentration monitor (154) is arranged between the reversing valve (153) of the oxygen delivery pipeline (15) and the air outlet of the molecular sieve group (13). The total control module (6) controls the working states of the PSA oxygen generation group (1) and the oxygen booster (4) through the monitoring and signal feedback of the low-pressure sensor (31), the high-pressure sensor (51) and the oxygen concentration monitor (154).

6. A combined oxygen supply method for PSA oxygen generation and emergency oxygen generation, characterized in that: The PSA oxygen generation and emergency oxygen generation combined oxygen supply system according to any one of claims 1-5 includes the following steps: Control the PSA oxygen generation group (1) to start and produce oxygen, and the oxygen booster (4) is in the closed state; the emergency oxygen generation group (2) does not produce oxygen; when the PSA oxygen generation group (1) fails to produce oxygen, the emergency oxygen generation group (2) can be used to produce oxygen. The oxygen concentration monitor (154) in the PSA oxygen generation group (1) monitors the oxygen concentration at the air outlet of the PSA oxygen generation group (1) in real time. When the oxygen concentration is lower than 90%, the low-concentration oxygen is discharged; when the oxygen concentration reaches more than 90%, the qualified oxygen is transported into the low-pressure buffer tank (3). After the oxygen enters the low-pressure buffer tank (3), it is cached, and the air pressure inside the low-pressure buffer tank (3) is monitored. When the internal pressure reaches the preset boosting value, the oxygen booster (4) is started to boost the oxygen inside the low-pressure buffer tank (3) and then input it into the high-pressure oxygen storage tank (5); when it is monitored that the air pressure in the low-pressure buffer tank (3) reaches the set maximum safety value, the PSA oxygen generation group (1) pauses oxygen generation until the air pressure decreases, and the PSA oxygen generation group (1) restarts oxygen generation. The oxygen boosted by the oxygen booster (4) enters the high-pressure oxygen storage tank (5) for storage. When the pressure inside the high-pressure oxygen storage tank (5) reaches the preset high-pressure value, the operation of the oxygen booster (4) is turned off; when the oxygen is used and the internal pressure decreases, the oxygen booster (4) restarts to work. Connect the portable oxygen supply device (7) to the filling device (8) for oxygen filling. After the oxygen filling is completed, disconnect the connection point.

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