KR20020096155A - Oxygen concentrator - Google Patents

Abstract

PURPOSE: An oxygen generator is provided, which generates concentrated oxygen as required by receiving the compressed air from the air compressed air storage tank, consists of three trains of concentrated oxygen generating devices set in parallel, so that only one air compressor in operation can supply the required air to the system thus saving investment cost and can generate oxygen of large amount continuously and simultaneously. CONSTITUTION: The generator comprises an air compressor(100) for producing compressed air by sucking ambient air; a compressed air storage part(200) for storing the compressed air; a concentrated oxygen generating part(300); a storage tank(400); a control part(500). The concentrated oxygen generating part(300) consists of three trains (a,b,c) of concentrated oxygen generating devices(300a,300b,300c) set in parallel, with each concentrated oxygen generating device(300a), for example a train, consisting of a pressure and flow control part(330a), a compressed air supplying part(320a), three oxygen concentrating parts(310a) set in parallel with c-train having only two, an equalizing valve part(340a) set in series.

Description

Oxygen generator {Oxygen concentrator}

The present invention relates to an oxygen generating device, and in particular, the compressed air is produced by the suction of external air with an air compressor, and the compressed air is stored and stored in the compressed air storage unit. It relates to an oxygen generating device having at least two or more concentrated oxygen generating means for producing a, and having a concentrated oxygen generating unit in which the concentrated oxygen generating means are connected in parallel.

In general, the oxygen generator is a device for separating and concentrating oxygen in the atmosphere. The operating principle of the oxygen generator utilizes a property in which an adsorbent called zeolite adsorbs predetermined gas molecules. Nitrogen, which occupies about 80% of the atmosphere, is better adsorbed to the zeolite than oxygen, so when air is introduced into the adsorption bed filled with the adsorbent, the nitrogen is adsorbed and the gas with reduced nitrogen is discharged to the outlet of the upper bed. As a result, oxygen is obtained as the main component of the emitted gas.

The above nitrogen adsorption process is a process in which only nitrogen is adsorbed by passing a pressurized gas through a predetermined adsorbent and the remaining gas is passed to separate oxygen from the air. At this time, zeolite, an adsorbent, adsorbs nitrogen and deteriorates its performance. Should be removed (removed) from it to restore its original performance. This process is to wash the adsorbent to recover the adsorption capacity by recycling the desorbed oxygen produced in the low pressure state to produce nitrogen adsorbed to the adsorbent in the washing process.

Conventionally known oxygen generators typically use one air compressor and two adsorption towers in a two tower one compressor system. This method alternately compresses and cleans each adsorption column to produce concentrated oxygen. Therefore, the time to compress and the time to wash | clean are the same. In other words, the oxygen generator is largely subjected to the compression step and the cleaning step, which is further subdivided into six of the low pressure step, the high pressure step, the first equalizer step, the cleaning step, the atmospheric pressure step, and the second equalizer step. It goes through the steps. Here, the first low pressure step is to increase the pressure of the tower, then the high pressure step is to produce concentrated oxygen, the first equalizer step is to send some of the concentrated oxygen to the tower at atmospheric pressure to increase the initial pressure And the washing step is to discharge nitrogen while reducing the pressure, and the atmospheric pressure step is to stagnate slightly in the washed state, and the second equalizer step is to increase the initial pressure by receiving concentrated oxygen from another adsorption column before pressurizing. This is the step.

Another oxygen generator known in the art uses a three tower two compressor method using two air compressors and three adsorption towers. This approach is described in detail in patent application 2000-46211 which is already patented. In brief, the compressed air generated by the two air compressors are sent to each adsorption tower, and the adsorption towers are compressed and washed alternately to produce concentrated oxygen. The oxygen generator is largely subjected to a low pressure stage, a high pressure stage and a washing stage. If any one of the adsorption towers is in the low pressure stage, the other is in the high pressure stage and the other is in the washing stage. As such, the adsorption towers in different processes continuously produce concentrated oxygen as cycles of low pressure, high pressure, and cleaning are cycled.

Since the conventional method produces only a certain amount of concentrated oxygen at a time, it requires a lot of time when a large amount of concentrated oxygen is required.

Accordingly, an object of the present invention is to solve the above-mentioned drawbacks, the intake of the external air with an air compressor to produce and output compressed air, and to store the output compressed air in the compressed air storage as necessary Oxygen generator capable of producing a large amount of concentrated oxygen at the same time having at least two concentrated oxygen generating means for producing concentrated oxygen by receiving compressed air of the same, and the concentrated oxygen generating unit connected in parallel to the concentrated oxygen generating means The purpose is to provide.

1 is a block diagram showing a schematic configuration of an oxygen generator according to the present invention

2 is a view for explaining the overall system configuration of the oxygen generator according to the present invention.

Figure 3 is a block diagram for explaining an embodiment of the oxygen generating apparatus according to the present invention.

Figure 4 is a table showing the pressure response characteristics and operation stage characteristics of each tower time of the first oxygen generating means according to the present invention.

* Code descriptions for the main parts of the drawings

100: air compressor 102: filter

200: compressed air storage unit 500: control unit

300: concentrated oxygen generating unit 300a, 300b, 300c: concentrated oxygen generating means

310a, 310b, 310c: oxygen concentration unit 312a, 312b, 312c: first adsorption tower

314a, 314b, 314c: second adsorption tower 316a, 316b: third adsorption tower

320a, 320b, 320c: Compressed air supply unit 322a, 322b, 322c: First solenoid valve

324a, 324b, 324c: Second solenoid valve 326a, 326b: Exhaust valve

328a, 328b, 328c: exhaust silencers 330a, 330b, 330c: pressure flow controller

332a, 332b, 332c: Pressure regulating valve 334a, 334b, 334c: Needle valve

340a, 340b, 340c: equalizer valve portion 341a, 341b, 341c: first orifice

342a, 342bc: second orifice 343a, 343b: third orifice

344a, 344b: 1st check valve 345a, 345b: 2nd check valve

346a, 346b: third check valve 347a, 347b, 347c: first equalizer valve

348a, 348b: second equalizer valve 349a, 349b: third equalizer valve

400: storage tank 402a, 402b, 402c: first backflow check valve

404a, 404b, 404c: second backflow check valve 406a, 406b: third backflow check valve

410: pressure regulator 420: flow meter

Oxygen generator according to the present invention for achieving the above object is an air compressor for producing and outputting compressed air by sucking the outside air, a compressed air storage unit for storing the compressed air output from the air compressor and the compressed air storage It is achieved by a concentrated oxygen generator having at least two concentrated oxygen generating means for producing concentrated oxygen by receiving compressed air stored in the unit, and connecting the concentrated oxygen generating means in parallel.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a schematic configuration of an oxygen generator according to the present invention.

As shown, the device is an air compressor (100) for producing and outputting compressed air by sucking the outside air, and a compressed air storage unit 200 for storing the compressed air output from the air compressor (100) and the compression Concentrated oxygen generating means (300a, 300b, 300c) for producing concentrated oxygen by receiving the compressed air stored in the air storage unit 200, and concentrated oxygen in which the concentrated oxygen generating means (300a, 300b, 300c) connected in parallel It is made up of a small generator 300.

The concentrated oxygen generating means (300a, 300b, 300c) of the concentrated oxygen generator 300 is oxygen concentrators (310a, 310b, 310c) for producing concentrated oxygen and the oxygen concentrators (310a, 310b, 310c) Compressed air supply unit 320a, 320b, 320c for selectively supplying compressed air, and compressed air stored in the compressed air storage unit 200 to supply a predetermined amount of compressed air supply unit (320a, 320b, 320c) at a constant pressure Pressure / flow control unit (330a, 330b, 330c) and the concentrated oxygen produced by the oxygen concentration unit (310a, 310b, 310c) and the equalizer valve unit (340a, 340b, 340c) to increase the pressure efficiency. .

On the other hand, the apparatus is provided with a storage tank 400 for storing the concentrated oxygen produced by the concentrated oxygen generator 300.

In addition, the control unit 500 for controlling the respective parts of the air compressor 100, the compressed air storage unit 200 and the concentrated oxygen generating means (300a, 300b, 300c) is also provided. A more detailed description will be described with reference to the system configuration diagram of FIG. 2.

2 is a view for explaining the overall system configuration of the oxygen generator according to the present invention.

As shown, the air compressor 100 generates and outputs compressed air by sucking external air, and has a filter 102 for filtering dust and foreign matter on the inlet side. Compressed air produced by the air compressor 100 is stored in the compressed air storage unit 200. The compressed air stored in the compressed air storage unit 200 is moved to the concentrated oxygen generator 300 for producing concentrated oxygen.

The concentrated oxygen generating means of the concentrated oxygen generator 300 includes first, second and third concentrated oxygen generating means 300a, 300b, and 300c. The first, second and third concentrated oxygen generating means (300a, 300b, 300c) are connected in parallel to receive the compressed air stored in the compressed air storage unit 200.

The first, second, and third concentrated oxygen generating means (300a, 300b, 300c) is the oxygen enrichment unit (310a, 310b, 310c) for producing concentrated oxygen, respectively, and the oxygen enrichment unit (310a, 310b, 310c) Compressed air supply unit 320a, 320b, 320c for selectively supplying compressed air to the compressed air and the compressed air stored in the compressed air storage unit 200 to supply a predetermined amount of compressed air supply unit (320a, 320b, 320c) at a constant pressure It consists of pressure / flow rate control unit (330a, 330b, 330c).

Here, since the first concentrated oxygen generating means 300a and the second concentrated oxygen generating means 300b produce concentrated oxygen by the same configuration, hereinafter, the first concentrated oxygen generating means 300a and the third concentrated livestock are produced. The fire generating means 300c will be described in detail.

Compressed air entering the first and third concentrated oxygen generating means (300a, 300c) and the pressure regulating valve (332a, 332c) provided in the pressure / flow control unit (330a, 330c), and the flow rate After the pressure and flow rate are adjusted by the adjusting needle valves 334a and 334c, they are supplied to the compressed air supply units 320a and 320c.

The compressed air supply unit 320a of the first concentrated oxygen generating unit 300a is connected to the compressed air storage unit 200 so that the first, second, and third adsorption towers 312a of the oxygen enrichment unit 310a are provided. Connected to the first and second solenoid valves 322a and 324a for selectively supplying compressed air to the 314a and 316a and the first and second solenoid valves 322a and 324a to exhaust nitrogen generated during cleaning to the outside. It consists of an exhaust valve 326a. The first and second solenoid valves 322a and 324a are five-port two-position valves, and the first solenoid valve 322a is connected to the first and second suction towers 312a and 314a, and the second solenoid valves ( 324a is connected to the second and third adsorption towers 314a and 316a. In particular, the first solenoid valve 322a allows the compressed air to flow into the first adsorption tower 312a from the compressed air storage unit 200 at the first position A, and the second adsorption tower (2) at the second position B. 314a). In addition, the second solenoid valve 324a allows the compressed air to be supplied from the compressed air storage unit 200 to the second adsorption tower 314a at the first position A, and at the second position B, the third adsorption tower ( 316a). The exhaust valve 326a is a direct acting valve for opening and closing the flow path.

On the other hand, the compressed air supply unit 320c of the third concentrated oxygen generating means (300c) is connected to the compressed air storage unit 200, the first and second adsorption tower (312c) of the oxygen concentration unit (310c), A discharge silencer connected with the first and second solenoid valves 322c and 324c for selectively supplying compressed air to the 314c and the first and second solenoid valves 322c and 324c to discharge nitrogen generated during cleaning to the outside ( 328c). The first and second solenoid valves 322c324c are 5-port 2-position valves.

The oxygen concentrating unit 310a provided in the first concentrated oxygen generating unit 300a selectively receives the air necessary for the process from the compressed air supply unit 320a to form a cycle of low pressure, high pressure, and cleaning. It is a three- tower type consisting of the first, second, third adsorption tower (312a, 314a, 316a) to produce. The adsorption towers 312a, 314a, and 316a are either in the low pressure stage, the other in the high pressure stage, and the other in the cleaning stage. As such, the adsorption towers 312a, 314a, and 316a in different processes produce concentrated oxygen as a cycle of low pressure, high pressure, and washing cycles. That is, when the first adsorption tower is described as an example, the first adsorption tower 312a continuously performs a high pressure process, a cleaning process, and a low pressure process to continuously produce concentrated oxygen.

On the other hand, the oxygen concentrating unit 310c provided in the third concentrated oxygen generating means (300c) is selectively supplied with the air required for the process from the compressed air supply unit (320c) concentrated oxygen while forming a cycle of pressurization, cleaning It is a two- tower type consisting of the first, second adsorption tower (312c, 314c) to produce. The adsorption towers 312c and 314c of the two-stage oxygen concentrator 310c are in the pressurizing stage, and the other is in the washing stage. As such, the adsorption towers 312c and 314c in different processes produce concentrated oxygen as the cycle of pressurization and washing is circulated. That is, when the first adsorption tower is described by way of example, the first adsorption tower 312c is subjected to a pressurizing process and continuously performs a washing process to produce concentrated oxygen.

In addition, the first concentrated oxygen generating means (300a) is supplied to the adsorption tower necessary for cleaning the concentrated oxygen produced in any one of the first, second, third adsorption tower (312a, 314a, 316a) of the adsorption tower while the initial pressure Equalizer valve portion 340a for supplying to the adsorption tower that needs to increase the cleaning and pressurization efficiency is provided. The equalizer valve part 340a is a first adsorption tower 314a to a third adsorption tower 316a, a third adsorption tower 314a to a second adsorption tower 314a, and a second adsorption tower 314a to a first adsorption tower ( 312a) orifices 341a, 342a and 343a for supplying the concentrated oxygen for cleaning, and check valves 344a, 345a and 346a which are paired and connected in series with the orifices 341a and 342a, 343a) and equalizing valves 347a, 348a, and 349a connected in parallel with check valves 344a, 345a and 346a to supply the oxygen with less concentration to the initial stage of pressure to increase the initial pressure. The paired orifices 341a, 342a and 343a and the check valves 344a, 345a and 346a are connected to the first adsorption tower 312a and the third adsorption tower 316a to supply concentrated oxygen for cleaning. The second orifice 342a and the second orifice 342a which are connected to the first orifice 341a and the first check valve 344a and the third adsorption tower 316a and the second adsorption tower 314a to supply concentrated oxygen for cleaning. A third orifice 343a and a third check valve 346a are connected to the check valve 345a, the second adsorption tower 314a, and the first adsorption tower 312a to supply concentrated oxygen for cleaning. Meanwhile, the equalizer valves 347a, 348a, and 349a are connected between the first adsorption tower 312a and the third adsorption tower 316a to intermittently supply concentrated oxygen, and the first equalizer valve 347a and the third adsorption valve 347a. A third equalizer valve 348a connected between the third adsorption tower 316a and the second adsorption tower 314a for intermittently supplying concentrated oxygen, and between the second adsorption tower 314a and the first adsorption tower 312a. And a third equalizer valve 349a for intermittently supplying concentrated oxygen.

On the other hand, the third concentrated oxygen generating means (300c) is also provided with an equalizer valve portion 340c for supplying concentrated oxygen to the first and second adsorption tower (312c, 314c) to increase the cleaning and pressurization efficiency. The equalizer valve portion 340c is an orifice 341c for supplying concentrated oxygen for cleaning from the first adsorption tower 312c to the second adsorption tower 314c and the second adsorption tower 314c to the first adsorption tower 312c. The first equalizer valve 347c is provided between the first adsorption tower 312c and the second adsorption tower 314c to supply the oxygen with less concentration to the initial pressurization to increase the initial pressure.

In addition, the apparatus is provided with a storage tank 400 for storing concentrated oxygen produced by the first, second, and third concentrated oxygen generating means (300a, 300b, 300c), the storage tank 400 It is provided with a pressure regulator 410 for adjusting and supplying the stored concentrated oxygen to a pressure suitable for the user and a flow meter 420 for controlling the discharge of concentrated oxygen output through the pressure regulator 410 in a predetermined amount. Of course, between the first, second and third concentrated oxygen generating means (300a, 300b, 300c) and the storage tank 400, respectively, the first, second, third concentrated oxygen generating means (300a, 300b, 300c) The first, second, and third check valves 402a, 404a, 406a, 402b, 404b, 406b, 402c, and 404c are provided to prevent the concentrated oxygen produced and supplied from the backflow.

In addition, the apparatus also includes a control unit 500 for controlling the respective parts of the air compressor 100, the compressed air storage unit 200 and the concentrated oxygen generating means (300a, 300b, 300c).

3 is a view for explaining an embodiment of the oxygen generator according to the present invention. The drawings will be described based on the respective adsorption towers provided in the oxygen concentration unit 310a of the first concentrated oxygen generating means 300a. Among the adsorption towers of the first concentrated oxygen generating means 300a, the first adsorption tower 312a is in a high pressure state, the second adsorption tower 314a is in a low pressure state, and the third adsorption tower 316a is in a cleaning state. . Starting from the above state, the concentrated oxygen production cycle of the apparatus will be described in detail.

Referring to the state shown in the drawings, the first step in the compressed air produced from the air compressor 100 and stored in the compressed air storage unit 200 and the pressure control valve 332a of the pressure / flow control unit 330a and The needle valve 334a is sent to the compressed air supply unit 320a while adjusting the pressure and flow rate. The compressed air delivered to the compressed air supply unit 320a supplies compressed air to the first adsorption tower 312a of the oxygen concentration unit 310a by using the first solenoid valve 322a of the compressed air supply unit 320a. It leads to high pressure. Then, the compressed air is supplied to the second adsorption tower 314a of the oxygen concentration unit 310a by using the second solenoid valve 324a of the compressed air supply unit 320a to reach a low pressure state. At this time, the third adsorption tower 316a of the oxygen concentrating portion 310a is in the washing step, and the nitrogen discharge due to the washing is carried out through the second solenoid valve 324a and the exhaust valve 326a and the discharge silencer 328a. Noise is emitted through the exhaust to the outside. Then, the first and second solenoid valves (322a, 324a) is in the first position (A), and in this state, the first adsorption tower 312a is a process of producing concentrated oxygen under high pressure. The two adsorption tower 314a is in a state in which the pressure rises to a low pressure even in a pressurized state. At the end of this state, the equalizer process is carried out. The equalizer process induces pressure equilibrium by supplying a certain amount of concentrated oxygen from the adsorption tower under high pressure to the adsorption tower under cleaning. The concentrated oxygen is supplied from the first adsorption tower 312a to the third adsorption tower 316a in a cleaning state. At this time, the first adsorption tower 312a, which is the one supplying the concentrated oxygen, performs the first equalizer process, and the third adsorption tower 316a, which is the one that receives the concentrated oxygen, performs the second equalizer process. The equalizer process is performed by the equalizer valve unit 340a. In detail, the first adsorption tower 312a producing concentrated oxygen under a high pressure may include a first orifice 341a and a first check valve ( A portion of the concentrated oxygen that goes to the storage tank 400 via 344a is sent to the third adsorption tower 316a to assist nitrogen desorption from the adsorbent in the third adsorption tower 316a in the cleaning process. In particular, the first equalizer valve 347a is opened at the cleaning end of the third adsorption tower 316a to send oxygen with less concentration from the first adsorption tower 312a to the third adsorption tower 316a, thereby producing complete oxygen. . Of course, the third adsorption tower 316a entering the pressurization step due to the supply of oxygen forms an initial pressure to quickly perform the pressurization.

In the second process, the first and second solenoid valves 322a and 324a are switched to the second position B by the controller 500 and the exhaust valve 326a is closed. Accordingly, after the first process, the first adsorption tower 312a is cleaned, and the second adsorption tower 314a is supplied with compressed air from the compressed air storage unit 200 through the first solenoid valve 322a to a high pressure state. Proceed to produce concentrated oxygen. In addition, the third adsorption tower 316a also receives compressed air from the compressed air storage unit 200 and proceeds to the low pressure stage. The equalizer process is also performed at the end of this state, whereby concentrated oxygen flows from the second adsorption tower 314a in the high pressure state to the first adsorption tower 312a in the clean state. To this end, some of the concentrated oxygen produced from the second adsorption tower 314a, which is producing concentrated oxygen at high pressure, through the third orifice 343a and the third check valve 346a is sent to the first adsorption tower 312a for cleaning. It is to help, by opening the third equalizer valve (349a) at the end to send less concentrated oxygen to the first adsorption tower (312a) to form an initial pressure so that the pressure is made quickly.

In the third process, the first solenoid valve 322a returns to the first position A, the second solenoid valve 324a maintains the second position B, and the exhaust valve 326a is switched to the open state. do. Therefore, the first adsorption tower 312a that has been cleaned receives the compressed air stored in the compressed air storage unit 200 through the first solenoid valve 322a and proceeds to a low pressure state. In addition, the second adsorption tower 314a proceeds to the washing step to discharge nitrogen to the outside by releasing nitrogen to the exhaust silencer 328a via the second solenoid valve 324a and the exhaust valve 326. In addition, the third adsorption tower 316a proceeds to a high pressure to produce concentrated oxygen. The equalizer stage occurs at the end of this state, and the concentrated oxygen is sent from the high pressure third adsorption tower 316a to the second adsorption tower 314a which is the cleaning stage. Of course, this also supplies the concentrated oxygen for cleaning through the second orifice 342a and the second check valve 345a provided between the third adsorption tower 316a and the second adsorption tower 314a, and the second equalizer valve 348a. The less concentrated oxygen is sent to the second adsorption tower 314a at the cleaning end to form an initial pressure upon pressurization.

The concentrated oxygen produced in each of the adsorption towers 312a, 314a, and 316a through the above processes is respectively stored in the storage tank 400 through the first, second, and third check valves 402a, 403a, and 404a. Is stored in, the user is supplied with the oxygen at the proper pressure and the appropriate amount through the pressure regulator 410 and the flow meter 420 to use.

On the other hand, when a large amount of concentrated oxygen is required, the first concentrated oxygen generating means 300a, the second concentrated oxygen generating means 300b, and the third concentrated oxygen generating means 300c are operated at the same time. Since the second concentrated oxygen generating means 300b has the same configuration as the first concentrated oxygen generating means 300a, the second concentrated oxygen generating means 300b undergoes the same process as the first concentrated oxygen generating means 300a to produce concentrated oxygen. However, the third concentrated oxygen generating means 300c has a slight difference since the oxygen concentration part 310c is a two-top type. Hereinafter, the process of producing concentrated oxygen by the third concentrated oxygen generating means 300c will be described.

As shown, in the first process, the compressed air produced from the air compressor 100 and stored in the compressed air storage unit 200 to the pressure regulating valve 332c and the needle valve 334c of the pressure / flow control unit 330c. It sends to the compressed air supply part 320c, adjusting pressure and flow volume. The compressed air delivered to the compressed air supply unit 320c is sent to the second solenoid valve 324c through the first solenoid valve 322c, and the second solenoid valve 324c is made of the oxygen concentrating unit 310c. 1 Compressed air is supplied to the adsorption tower 312c to reach a pressurized state. At this time, the second adsorption tower 314c of the oxygen concentration unit 310c is in the washing step, the nitrogen discharge according to the cleaning is the second solenoid valve 324c and the first solenoid valve 322c and the discharge silencer 328c Noise is emitted through the exhaust to the outside. Then, the first solenoid valve 322c above is in the second position (B), the second solenoid valve 324c is in the first position (A), in this state the first adsorption tower 312c is It is a process of producing concentrated oxygen under a pressurized state, and the second adsorption tower 314c is in a washing state. At the end of this state, the equalizer process is carried out. The equalizer process induces pressure equilibrium by supplying a certain amount of concentrated oxygen from the adsorption tower under pressure to the adsorption tower under cleaning. The concentrated oxygen is supplied from the first adsorption tower 312c to the second adsorption tower 314c in a washing state. At this time, the first adsorption tower 312c, which is the one supplying the concentrated oxygen, performs the first equalizer process, and the second adsorption tower 314c, which is the one that receives the concentrated oxygen, performs the second equalizer process. The equalizer process is performed by the equalizer valve unit 340c, which will be described in more detail. The first adsorption tower 312c producing concentrated oxygen under pressure sends a portion of the concentrated oxygen to the second adsorption tower 314c. Helps with nitrogen desorption In particular, the first equalizer valve 347c is opened at the cleaning end of the second adsorption tower 314c to send oxygen with less concentration from the first adsorption tower 312c to the second adsorption tower 314c, thereby producing a complete concentrated oxygen. . At this time, the orifice 341c serves to supply concentrated oxygen for cleaning when the first adsorption tower 312c performs the first equalizer process and the second adsorption tower 314c performs the second equalizer process. As described above, the concentrated oxygen produced in each of the adsorption towers 312c and 314c is stored in the storage tank 400 through the first and second check valves 402c and 404c, respectively. 410 and the flow meter 420 is used to receive oxygen at a proper pressure and the appropriate amount.

Such an oxygen generating device can be widely used where a small capacity and a large amount of concentrated oxygen are required by connecting oxygen generating means in parallel.

Figure 4 is a diagram showing the pressure response characteristics and operation stage characteristics of each tower time of the first oxygen generating means according to the present invention, wherein the first adsorption tower is shown by a solid line, the second adsorption tower is shown by a dashed line and the third adsorption tower is shown by a dotted line It was.

In the concentrated oxygen production process of the adsorption towers, three processes are repeated in one cycle. As shown by the solid line, the first adsorption tower has one cycle of low pressure stage in stage I, high pressure stage in stage II, and washing stage in stage III. To be performed continuously. Of course, at this time, the second adsorption tower starts with a cycle in step II as shown by a dashed-dotted line, starts a low pressure step, passes through steps III and IV, and is subjected to high pressure and cleaning. Of course, the third adsorption tower also starts a cycle one step later than the second adsorption tower, and is continuously subjected to the steps of low pressure, high pressure, and cleaning.

As described above, the oxygen generating device of the present invention sucks external air with an air compressor to produce and output compressed air, and stores the compressed air output in the compressed air storage to receive the compressed air as necessary. At least two or more concentrated oxygen generating means for producing concentrated oxygen and having a concentrated oxygen generating unit connected in parallel with the concentrated oxygen generating means can continuously produce a large amount of concentrated oxygen. Because of this, there is an effect that can increase the concentrated oxygen production per unit time. On the other hand, the conventional three- tower two compressor type oxygen generator because the use of two air compressors increased the cost of installing two air compressors, there was a disadvantage that the device configuration is complicated, but the oxygen generator of the present invention Since the compressed air is supplied to the concentrated oxygen generator with only one air compressor, the above disadvantages can be overcome.

Claims (14)

In the oxygen generating device for producing concentrated oxygen by introducing external air, An air compressor that sucks external air to produce and output compressed air; Compressed air storage unit for storing the compressed air output from the air compressor; And Oxygen generating device comprising a concentrated oxygen generating unit having at least two concentrated oxygen generating means for producing concentrated oxygen by receiving the compressed air stored in the compressed air storage unit, the concentrated oxygen generating means connected in parallel. The oxygen generator of claim 1, further comprising a control unit for controlling the concentrated oxygen generator and the air compressor. The oxygen generator of claim 1, further comprising a storage tank for storing concentrated oxygen produced by the concentrated oxygen generator and supplying the concentrated oxygen to a user if necessary. The method of claim 1, wherein the concentrated oxygen generating unit is an oxygen enrichment unit having at least two adsorption towers for producing concentrated oxygen, and a compressed air supply unit for selectively supplying compressed air to the oxygen enrichment unit. And an adsorption tower for cleaning the concentrated oxygen produced by any one of the adsorption towers of the adsorption tower of the pressure / flow control unit and the oxygen concentrating unit, which supplies the compressed air stored in the compressed air storage unit to a predetermined amount of compressed air supply unit at a constant pressure. Oxygen generator, characterized in that consisting of an equalizer valve for increasing the cleaning and pressurization efficiency by supplying to the adsorption tower that requires the initial pressure. 5. The method of claim 4, wherein the compressed air supply unit is connected to the air compressor and connected to the first and second solenoid valves for selectively supplying the compressed air to the adsorption tower and the first and second solenoid valves. Oxygen generator, characterized in that consisting of an exhaust valve for exhausting the nitrogen to the outside. The oxygen generator of claim 5, wherein the first and second solenoid valves are five-port two-position valves, and the exhaust valves are direct-acting valves for opening and closing a flow path. 5. The oxygen generator of claim 4, wherein the pressure / flow control unit comprises a pressure regulating valve and a needle valve to control the flow rate. According to claim 4, wherein the equalizer valve unit is provided between each of the adsorption tower for supplying the concentrated oxygen for cleaning, and paired in parallel with the check valve connected in series and the paired orifice and check valve connected in parallel Oxygen generator, characterized in that consisting of equalizer valves to increase the initial pressure by supplying less concentrated oxygen in the initial pressurization. The method of claim 8, wherein the oxygen concentrating unit is composed of the first, second, third adsorption tower for producing concentrated oxygen in a cycle of low pressure, high pressure, cleaning by selectively receiving the air required for the process from the compressed air supply unit Oxygen generator, characterized in that the tower type. The method of claim 8, wherein the oxygen concentrating unit is a two- tower type consisting of the first and second adsorption tower for producing concentrated oxygen while receiving a cycle of pressurization, cleaning selectively receives the air required for the process from the compressed air supply unit Oxygen generator characterized in that. The oxygen generator according to claim 9 or 10, wherein the concentrated oxygen generator is connected in parallel with a concentrated oxygen generator having a three-top oxygen concentrator and a concentrated oxygen generator having a two-top oxygen concentrator. 12. The concentrated orifice according to claim 11, wherein the paired orifices and check valves of the equalizer valve portion provided in the concentrated oxygen generating means including the three- tower type oxygen enrichment unit are connected to the first adsorption tower and the third adsorption tower. The first orifice and the first check valve for supplying the cow, the second orifice and the second check valve and the second adsorption tower and the second connected to the third adsorption tower and the second adsorption tower for supplying concentrated oxygen for cleaning An oxygen generator comprising: a third orifice and a third check valve connected to an adsorption tower for supplying concentrated oxygen for cleaning. The method of claim 12, wherein the equalizer valves are connected between the first adsorption tower and the third adsorption tower, the first equalizer valve for intermittently supplying concentrated oxygen, and the third adsorption tower is connected between the second adsorption tower and concentrated oxygen And a third equalizer valve for intermittently supplying the second equalizer valve and a third equalizer valve connected between the second adsorption tower and the first adsorption tower for intermittently supplying concentrated oxygen. 12. The method of claim 11, wherein the equalizer valve portion provided in the concentrated oxygen generating means having a two-stage oxygen concentrating unit is connected between the first adsorption tower and the second adsorption tower and the first equalizer valve for intermittently supplying concentrated oxygen; An oxygen generating apparatus comprising: a first orifice connected to the first adsorption tower and the second adsorption tower to supply concentrated oxygen for cleaning.