Abstract:
The present invention relates to an apparatus and process of oxygen concentration system to make it possible to produce a highly purified concentrated oxygen,with modifying the structure of the adsorption bed and it achieves evenness of the first and second upper portions and controls to make simultaneous evenness of the first and second upper/lower portions together and thus increases purity of the oxygen produced and reduces mechanical energy and consumption of electricity of the air compressor, then it is about the oxygen concentration apparatus to make it possible to promote pure oxygen enrichment and its recovery rate and the oxygen concentration method to use it.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims the benefit of Korean Patent Application No. 10-2006-0046611, filed in the Korean Intellectual Property Office on May 24, 2006 and 10-2006-8516, filed in the Korean Intellectual Property Office on Jan. 26, 2006 the disclosure of which is incorporated herein by reference. 
       BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    The present invention relates to an apparatus and process of oxygen concentration system to make it possible to produce a highly purified concentrated oxygen with modifying the structure of the adsorption bed and it achieves evenness of the first and second upper portions and controls to make simultaneous evenness of the first and second upper/lower portions together and thus increases purity of the oxygen produced and reduces mechanical energy and consumption of electricity of the air compressor, then it is about the oxygen concentration apparatus to make it possible to promote pure oxygen enrichment and its recovery rate and the oxygen concentration method to use it. 
         [0004]    2. Description of Related Art 
         [0005]    In general, the conventional oxygen concentration apparatus uses the property in which the adsorbent, called Zeolite adsorbs gas molecule. The nitrogen which constitutes about 80% of atmospheric air, is easily absorbed with Zeolite, thus if the air is compressed and infused into the adsorption bed containing adsorbent, the nitrogen component is absorbed and the air, in which the nitrogen component is reduced is output through the upper outlet of the adsorption bed then supplies the output oxygen for the required place and it is used. 
         [0006]    In the oxygen concentrating process of the oxygen apparatus, it is distinguished into the adsorption process in which the compressed air is passed through the absorbent and the nitrogen is absorbed and the process of cleansing of the adsorbent. 
         [0007]    In the adsorption process, the compressed air is passed through the absorbent and the only nitrogen is absorbed and the remaining gas is passed thus the oxygen in the air is acquired to be separated, in this time, the efficiency of Zeolite, the absorbent, is markedly reduced to absorb nitrogen, the original efficiency of it must be regained to desorb the absorbed nitrogen within the absorbent. 
         [0008]    The oxygen acquired by absorption of the nitrogen within the absorbent is moved into the storage place when it reaches a constant pressure and it is maintained to be in stored state in a considerable high pressure and then a portion of it is regurgitated into the absorbent and performs nitrogen cleansing so its absorption efficiency is regained. 
         [0009]    The conventional general oxygen concentration apparatus contains complicated inner and outer structure to produce high purity concentrated oxygen and it has a problem of increased production cost, decreased productivity and happening of out of order. 
         [0010]    Also, in the conventional oxygen concentration apparatus, to produce oxygen, it contains the absorption column interiorly and in which its upper portion and lower portion is interchanneled mutually only either evenness of the upper portion or evenness of the lower portion can be operated on at a time, so it has a problem that pressure preparation time, consumption of electricity, purity, pure oxygen enrichment, and its recovery rate are unsatisfactory in the event. 
         [0011]    Also, when the air compressor connected with oxygen apparatus is operating, too much mechanical energy is consumed that causes disadvantage in general aspect of management of the oxygen apparatus, and furthermore the noise of the nitrogen output is increased. 
       SUMMARY OF THE INVENTION 
       [0012]    In considering the above mentioned problem, the object of the present invention is designed to solve the problem the structure is altered into single absorption bed to be capable of producing highly purified concentrated oxygen and to provide the oxygen concentration apparatus easily capable of attaching and detaching the solenoid valve on the adsorption bed. The other object of the invention is, when oxygen concentration is performing in the oxygen apparatus, after the first and second evenness of the adsorption column is performed, serially, the first and second upper/lower evenness is performed, thus it provides the oxygen concentration method to produce concentrated oxygen with high purity and to reduce the consumption of electricity by the air compressor as possible as it can be used. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0013]    A more complete appreciation of the invention, and many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference symbols indicate the same or similar components, wherein: 
           [0014]      FIG. 1  is an exploded perspective view of an apparatus of the oxygen concentration system according to the preferred embodiment of the present invention. 
           [0015]      FIG. 2  is a coupled perspective view of an apparatus of the oxygen concentration system according to the preferred embodiment of the present invention. 
           [0016]      FIG. 3  is a process flow chart of oxygen concentration system according to the preferred embodiment of the present invention. 
           [0017]      FIG. 4   a  to  FIG. 4   h  are the views of air pressure circuit line of an operating state of each step of oxygen concentration method according to the preferred embodiment of the present invention. 
           [0018]      FIG. 5   a  to  FIG. 5   h  is the views of operating state of an apparatus of the oxygen concentration system according to the preferred embodiment of the present invention. 
           [0019]      FIG. 6  is a graph of pressure distribution chart according to the operation of the oxygen concentration system according to the preferred embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0020]    Hereinafter, the present invention now will be described in detail with reference to the accompanying drawing. 
         [0021]    A first solenoid valve is mounted on the outside of bed housing which able to supply and/or discharge of compressed air, an adsorption bed is provided with an oxygen reservoir to store the concentrated oxygen. 
         [0022]    A first and second adsorption column disposed in the adsorption bed to separate the nitrogen and oxygen in the compressed air supplying through the first solenoid valve. A first and second cover assembly mounting engaged on the upper and lower part of the adsorption bed each, the first cover assembly includes a first and second grooves formed with isolating to positioned corresponding to the first and second adsorption column on the inside surface of the first cover plate, a first and second check valve installed to movable of the concentrated oxygen through the supplying hole communicating with the oxygen reservoir of the adsorption bed of penetrate formed on the same position of the first and second grooves. 
         [0023]    A fitting or mounting part is incorporated on the outside upper part of the first cover plate with an end which is communicating formed with the inside of the first and second grooves each other and another end is formed on inside of the first and second communicating hole extending to the outside of the first cover assembly. 
         [0024]    A second solenoid valve fixed mounting on the mounting part coupled with able to gaseous communicate with the first and second communicating hole operable to equilibrium pressure of the first and second adsorption column, and a chamber installed on the outside of the first cover plate, of which flow able to supplying hole with supplied gas through the first and second check valve. 
         [0025]    The first cover assembly is formed penetrating on the lower end of one side of the first and second check valve, a first and second orifice is formed communicating with the first and second adsorption column and reverse flow able with a portion of the concentrate oxygen when, the pressure of any one of the first and second adsorption column is get higher and another one of pressure is lowered, the attached nitrogen of any one of the first and second adsorption column is able to rinse. 
         [0026]    The first and second check valve and supply hole is disposed on the region of chamber while, positioned on the same line each and the first and second orifice, positioning on isolated with the lower side of the first and second check valve and supply hole, disposed on the region of chamber while, positioned on the same line each other. 
         [0027]    The first and second check valve is engage mounted on a fixed hole formed on the first cover plate including a valve hole formed gaseous communicable with isolating each other on both side of the fixed hole, a valve body of flexible material is able to operable with flexible by the pressure of moving gas via the valve hole. 
         [0028]    A chamber cover including the first chamber formed on the inside of the chamber cover body on the chamber of the first cover assembly which is compartment with the close sealed separate region to outside; and the second chamber incorporating formed on the lower side of the first chamber, of compartment with a close sealed separate region with the outside with flow able to gas supplying through the first orifice and the second orifice. 
         [0029]    The chamber cover is interposed along with the external edge of the first, second chamber formed on the body of chamber cover including sealing element positioned with an engaged state on the external peripherals of the chamber. 
         [0030]    The second cover assembly including the third and fourth grooves of which isolate formed to corresponding to the first and second adsorption column on the inside surface of the second cover plate, and a connecting hole is penetrating formed in between the third and fourth grooves and communicating with the oxygen reservoir of the adsorption bed. 
         [0031]    The first solenoid valve is preferred to use a 5 port 3 way solenoid valve or plurals of the 3 port 2 way solenoid valves. 
         [0032]    The second solenoid valve is preferred to use a 2 port 2 way solenoid valve. 
         [0033]    As the above described construction, process of oxygen concentration system according to the preferred embodiment of the present invention is includes a step of compressing the external air supplying to the first adsorption column of the adsorption bed through the air compressor;
   a step of production of the concentrated oxygen in the time of same pressure with the pressure of the inside of the adsorption bed and the pressure of the first adsorption column when, the nitrogen substance, included in the compressed air is adsorbed in the first adsorption column;   a step of the first upper part equalization to equalize the upper part pressure of the first and second adsorption column, the compressed gas supplied on the first adsorption column is supplying to the second adsorption column included in inside of the adsorption bed after production of the concentrated oxygen on the first adsorption column;   a step of the first upper/lower part equalization accomplish with the first and second adsorption column is equalize with the first upper part equalization and lower part equalization concurrently, the external air supplied with the step of first upper part equalization through the lower part of the first adsorption column is supplying through lower part of the second adsorption column;   
 
         [0037]    A step of decompression of which the first adsorption column is reduce pressure with not supplying the compressed external air to the first adsorption column while, the compressed external air supplying to the second adsorption column in inside of the adsorption bed and elevated the internal pressure through the air compressor;
   a step of cleansing, accomplished with desorption and rinsing with the pressure of the first adsorption column in the state of decompressed nearly to the atmospheric pressure, the nitrogen substance containing in the compressed air is adsorbed on the second adsorption column and producing a high concentrated oxygen in the time of same pressure with the inside pressure of the adsorption bed and the second adsorption column;   a step of equalization of the second upper part, the supplied compressed gas on the second adsorption column is supplied to the first adsorption column installed in inside of the adsorption bed after the producing of concentrated oxygen at the second adsorption column to equalize the upper part pressure of the first and second adsorption column; and   
 
         [0040]    A step of second upper/lower part equalization accomplished concurrently with the lower part equalization and the second upper part equalization of the first and second adsorption column with the second upper equalization step supplied external air through the lower part of the second adsorption column is supplying through the lower part of the first adsorption column. 
         [0041]    The step of production of the concentrated oxygen is includes a step of storing of concentrated oxygen is stored on inside of adsorption bed of which the high concentrated oxygen produced on the first adsorption column. 
         [0042]    The step of the first and the second upper/lower part equalization is carried by the pressure of the first adsorption column is lowered rapidly and the pressure of the second adsorption column is elevated rapidly and the pressure of the first and second adsorption column reached to a same pressure at any second. 
         [0043]    The step of the first upper/lower part equalization is accomplished concurrently and continuously with the step of the first upper part equalization is established. 
         [0044]    The step of the second upper/lower part equalization is accomplished concurrently and continuously with the step of the second upper part equalization is established. 
         [0045]    Next, the present invention will be described in more detail through Examples; however, the present invention is not limited by the examples. 
         [0046]    As illustrated in  FIG. 1  to  FIG. 6 , the apparatus of oxygen concentration system according to the present invention is including a first solenoid valve  10  mounted on the outside of bed housing  21  which able to supply and/or discharge of compressed air, the first and second adsorption column  22 ,  24  disposed in the adsorption bed  20  to separate the nitrogen and oxygen in the compressed air supplying through the first solenoid valve  10  and the adsorption bed  20  is provided with an oxygen reservoir  26  to store the concentrated oxygen. 
         [0047]    The adsorption bed  20  is a single adsorption bed and the first and second adsorption column  22 ,  24  is disposed to install in pararell position and formed as a tube type on the inside of lengthened direction, then, the oxygen reservoir  26  is provided to store the concentrated oxygen on the space in between the bed housing  21 . 
         [0048]    The first solenoid valve  10 , mounted on external upper part of the adsorption bed  20 , is preferred to use the 5 port 3 way solenoid valve or plurals of the 3 port 2 way solenoid valve, equipped to operate to supply and discharge of the compressed air produced at the air compressor  9  compressing the air to pressure of over the atmospheric pressure. 
         [0049]    A exhaust silencer  2  is mounted on the outside of the adsorption bed  20  to prevent noise producing from the nitrogen gas exhaust at the first adsorption column  22  or second adsorption column  24 . 
         [0050]    A first and second cover assembly  100 ,  400  are engaged mounted on upper and lower part of the adsorption bed  20  each. The first cover assembly  100  includes a first and second grooves  112 ,  114  of which isolate formed on the inside surface of the first cover plate  110  corresponding to the first and second adsorption column  22 ,  24  each. 
         [0051]    A first and second check valve  120 ,  130 , mounted on the first groove  112  and second groove  114 , for the concentrated oxygen produced in the first adsorption column  22  and second adsorption column  24  are movable through the supply hole  116  communicated with the oxygen reservoir  26  of the adsorption bed  20 . An oxygen exhaust hole  118  formed on upper side of the supply hole  116  and connecting with a tube (not shown) to a tube line (not shown) for supplying of the concentrated oxygen. 
         [0052]    The first and second check valve  120 ,  130  is installed engaging on the fixed hole  121 ,  131  formed on the first cover plate  110 , while, valve hole  122 ,  132  are formed on both side of the fixed hole  121 ,  131  with isolating each other to flowable gas. 
         [0053]    The first and second check valve  120 ,  130  including the valve body  124 ,  134  which are operable flexibly with a flexible material by the pressure of gas through the valve hole  122 ,  132 . 
         [0054]    A first orifice  140  and second orifice  150  are penetrate formed on lower end of one side of the first and second check valve  120 ,  130  on the first and second grooves  112 ,  114  of the cover plate  110 , thus, when, the pressure of any one of the first and second adsorption column  22 ,  24  is elevated and the pressure of another one is decreased, any one of the attached nitrogen of the first and second adsorption column  22 ,  24  is able to cleansing with a part of the concentrated oxygen can be reverse flow by funnel formed with the first and second adsorption column  22 ,  24 . 
         [0055]    A fitting part  160  is incorporated on upper part of outside of the first cover plate  110  thus, one end is funnel formed on the inside of the first and second grooves  112 ,  114  and another end is formed inside includes the first, second funnel holes  162 ,  164  which extending to the outside of the first cover assembly  100 . 
         [0056]    The second solenoid valve  170  is coupled with gas flowable to the first and second funnel hole  162 ,  164  and mounted on the fitting part  160  and constructed to pressure equalization the inside of the first and second adsorption column  22 ,  24  at a portion. The second solenoid valve  170  is desirably to use a 2 port 2 way type solenoid valve. 
         [0057]    The solenoid valve  170  is fixed with fixing screw on plurals of screw hole formed on the fitting part  160 . 
         [0058]    The chamber part  200  is constructed compartment separately with the first and second check valve  120 ,  130  and the first and second orifice  140 ,  150  on the surface of outside of the first cover plate  110 . 
         [0059]    The first and second check valve  120 , 130  and supply hole  116  are disposed on same line of the region of chamber part  200 . The first and second orifice  140 ,  150  are positioned on isolated with lower side of the check valve  129 ,  130  and the supply hole  116  and are disposed on the same line of the region of chamber part  200  each. 
         [0060]    A chamber cover  300  is mounted on the chamber part  200  of the first cover assembly  100 , a first chamber  312  is formed on inside of the chamber cover body  310  with compartment to separate close sealed region to the outer and the supplied gas from the first check valve  120  or second check valve  130  is flow able to the supply hole  116 . 
         [0061]    A second chamber  314  is formed on lower side of the first chamber  312  incorporated with compartment to close sealed region separate to the outer and flow able the supplied gas through the first orifice  140  or second orifice  150 . 
         [0062]    And, a sealing element  320  is inserting fitted along with the edge of outside of the first and second chambers  312 ,  314  formed on the chamber cover body  310  and engaged with outer peripherals of the chamber part  200 . 
         [0063]    A cap plate  4  formed with plurals of through hole is mounted on upper and lower end of the first and second adsorption column  22 ,  24  installing inside of the adsorption bed  20 , when, the concentrated oxygen produced from the first adsorption member  22  or second adsorption member  24  is flow to moving with the same and evenly flow velocity by the through hole formed on the cap plate  4 . 
         [0064]    A filter (not shown) is fitted in between the cap plate  4  and the first and second adsorption column  22 ,  24  to prevent flow out of the grain of zeolite included in the inside of the first and second adsorption column  22 ,  24  and filtering the compressed air supplied from the air compressor  9 . 
         [0065]    The packing elements  6  are fitted on inside of the first cover assembly  100  and second cover assembly  400 , each. The spring  8  is interposed between the first cover assembly  100  and the cap plate  4 . The spring  8  is installed to press the first and second adsorption column  22 ,  24  because of the volume of the zeolite included in the first and second adsorption column  22 ,  24  is smaller to the passed time with. 
         [0066]    The second cover assembly  400  includes the third and fourth grooves  410 ,  420  isolate formed positioned corresponding to the first and second adsorption column  22 ,  24  on the inside surface of the second cover plate  400  and penetrate formed in between the third and fourth grooves  410 ,  420  and includes the connecting hole  430  funneled to a oxygen reservoir  26  of the adsorption bed  20  with concentrated oxygen. 
         [0067]    The second cover assembly  400  is constitute the compressed air via the first solenoid valve  10  flows in inside of the second cover plate  400  can be supply to the first adsorption column  22  or second adsorption column  24 . 
         [0068]    As the above described construction, process of oxygen concentration system according to the preferred embodiment of the present invention is includes; 
         [0069]    A step of air compressing (ST 100 ) the external air supplying to the first adsorption column  22  of the adsorption bed  20  through the air compressor  9 ;
   a step of production of the concentrated oxygen (ST 200 ) in the time of same pressure with the pressure of the inside of the adsorption bed  20  and the pressure of the first adsorption column  22  when, the nitrogen substance, included in the compressed air is adsorbed in the first adsorption column  22 ;   a step of the first upper part equalization (ST 300 ) to equalize the upper part pressure of the first and second adsorption column  22 ,  24 , the compressed gas supplied on the first adsorption column  22  is supplying to the second adsorption column  24  included in inside of the adsorption bed  20  after production of the concentrated oxygen on the first adsorption column  22 ;   a step of the first upper/lower part equalization (ST 400 ) is accomplished with the first and second adsorption column  22 ,  24  is equalize with the first upper part equalization (ST 300 ) and lower part equalization concurrently, the external air supplied with the step of first upper part equalization (ST 300 ) through the lower part of the first adsorption column  22  is supplying through lower part of the second adsorption column  24 .   
 
         [0073]    A step of decompression (ST 500 ) of which the first adsorption column  22  is reduce the pressure with not supplying the compressed external air to the first adsorption column  22  while, the compressed external air supplying to the second adsorption column  24  in inside of the adsorption bed  20  and elevated the internal pressure through the air compressor  9 ;
   a step of cleansing (ST 600 ) accomplished with desorption and rinsing with the pressure of the first adsorption column  22  in the state of decompressed nearly to the atmospheric pressure, the nitrogen substance containing in the compressed air is adsorbed on the second adsorption column  24  and producing a high concentrated oxygen in the time of same pressure with the inside pressure of the adsorption bed  20  and the second adsorption column  24 ;   a step of equalization of the second upper part (ST 700 ), the supplied compressed gas on the second adsorption column  24  is supplied to the first adsorption column  22  installed in inside of the adsorption bed  20  after the producing of concentrated oxygen at the second adsorption column  24  to equalize the upper part pressure of the first and second adsorption column  22 ,  24 ; and   a step of second upper/lower part equalization (ST 800 ) accomplished concurrently with the lower part equalization and the second upper part equalization of the first and second adsorption column  22 ,  24  with the second upper equalization step (ST 700 ) supplied external air through the lower part of the second adsorption column  24  is supplying through the lower part of the first adsorption column  22 .   
 
         [0077]    The step of production of the concentrated oxygen (ST 200 ) is including a step of storing of concentrated oxygen (ST 210 ) is stored on inside of adsorption bed  20  of which the high concentrated oxygen produced on the first adsorption column  22 . 
         [0078]    The step of the first and the second upper/lower part equalization (ST 400 ,ST 800 ) is constituted with the pressure of the first adsorption column  22  is lowered rapidly and the pressure of the second adsorption column  24  is elevated rapidly and the pressure of the first and second adsorption column  22 ,  24  reached to a same pressure at any second. 
         [0079]    The first upper/lower part equalization (ST 400 ) is accomplished concurrently and continuously with the step of the first upper part equalization (ST 300 ) is established. 
         [0080]    The step of the second upper/lower part equalization (ST 800 ) is accomplished concurrently and continuously with the step of the second upper part equalization (ST 700 ) is established. 
         [0081]    The operating state according to the present invention is will be described with reference to the drawings; 
         [0082]    As illustrated in  FIG. 1  to  FIG. 5   h,  the apparatus of oxygen concentration system according to the present invention, the purity of concentrated oxygen is increased, and reciprocated the 8 steps of pressurization of air: a step of air compressing (ST 100 ), production of concentrated oxygen: a step of production of the concentrated oxygen (ST 200 ), the first upper part equalization: a step of the first upper part equalization (ST 300 ), the first upper/lower part equalization: a step of the first upper/lower part equalization (ST 400 ), depressurize: a step of decompression (ST 500 ), cleansing: a step of cleansing (ST 600 ), the second upper part equalization: a step of equalization of the second upper part (ST 700 ), the second upper/lower part equalization, a step of second upper/lower part equalization (ST 800 ) to improve the purities of concentrated oxygen, recovery of the mechanical energy of the air compressor simultaneously with decreasing the electric power consumption. 
         [0083]    As illustrated in  FIG. 5   a  is the views of operating state of an apparatus of the oxygen concentration system according to the preferred embodiment of the present invention as [a] is a view of air pressure circuit line according to compressed air flow in to the oxygen concentration system, [b] is a view of gas flow stream in actual oxygen concentration system. 
         [0084]    As illustrated in  FIG. 5   a, a produced compressed air from the air compressor  9  is supplied to the first solenoid valve  10  in the state of closing the first and second check valve  120 , 130  (ref.  FIG. 1 ). 
         [0085]    As illustrated in  FIG. 5   a  [b], the produced compressed air from the air compressor  9  through the stage (A) of solenoid valve  10 , is compressing (ST 100 ) the first adsorption column  22 , and not supply to the second adsorption column  24  (by off state of the stage (C) side of the first solenoid valve  10 ) and depressurized step by step, the second solenoid valve  170  maintained the state of closing off in this time. 
         [0086]    As illustrated in  FIG. 5   b,  the compressed air from the air compressor  9  supply to the first adsorption column  22  continuously, while the nitrogen substance contained in the compressed air is adsorbed by zeolite in the first adsorption column  22  thus, the concentrated oxygen is produced (ST 200 ) and supply through the tube (not shown) connecting with the oxygen exhaust hole  118  separately. 
         [0087]    The first check valve  120  in the first cover plate  110  (ref.  FIG. 1 ) is opened to outside by the pressure of concentrated oxygen, in the time of the pressure of first adsorption column  22  is same as the inside pressure of the oxygen reservoir  26  and high purity concentrated oxygen flows to in the first chamber  312  of chamber part  200  (ref. FIG.  1 ) via the valve hole  122  (ref.  FIG. 1 ) of the first check valve  120 . 
         [0088]    The concentrated oxygen of flow in the first chamber  312  is stored (ST 210 ) in the oxygen reservoir  26  of the adsorption bed  20  via the supply hole  116  without leakage by the sealing element  320  (ref.  FIG. 1 ) of the chamber cover  300 . While, a part of the concentrated oxygen, produced in the first adsorption part  22 , in flowed via the first orifice  140  formed on the first groove  112  (ref.  FIG. 1 ) of the first cover plate  110  and supply to the second chamber  314  of the chamber part  200  (ref.  FIG. 1 ). 
         [0089]    One portion of concentrated oxygen supplied to the second chamber  314  is supply to the second adsorption column  24  via the second orifice  150 . 
         [0090]    As described above, the concentrated oxygen, supplied to the second adsorption column  24 , make cleansing the nitrogen substance adsorbed in zeolite included in the second adsorption column  24  while, exhaust the nitrogen through the exhaust silencer  2  connecting with first solenoid valve  10 . 
         [0091]    As illustrated in  FIG. 5   c  is a view of actuating state of the first upper part equalization of the oxygen concentration system according to the present invention. 
         [0092]    As illustrated in  FIG. 5   c,  the adsorption proceeding in a constant time followed with compressing of first adsorption column  22  by the compressed air produced by the air compressor  9  and after produce the concentrated oxygen then, the second solenoid valve  170  is open actuating to funneled the first adsorption column  22  and second adsorption column  24 , concurrently. 
         [0093]    That is, as the second solenoid valve  170  actuating ON, the 2 port formed inside of the second solenoid valve  170  is opened, the concentrated oxygen of the first adsorption column  22  is moved to the fitting part  160  equipped the second solenoid valve  170  and supply to a port of one side of the second solenoid valve  170  and move to another port, then flow to the second funnel hole  164  (ref.  FIG. 1 ) of the second groove  114 . 
         [0094]    The concentrated oxygen flowed in the second funnel hole  164  is reversal flow to second adsorption column  24  instantly, as the pressure in the first and second adsorption column  22 ,  24  become equal on a portion, and become the first upper equalization (ST 300 ) thus, the compressed concentrated oxygen can be reuse in compressing and adsorption of the second adsorption column  24 . 
         [0095]    As illustrated in  FIG. 5   d  is a view of operating state of the first upper/lower part complex equalization of the oxygen concentration system according to the present invention. The first upper/lower part complex equalization means actuating of the first upper equalization and lower equalization is accomplished in a same time. 
         [0096]    As illustrated in  FIG. 5   d,  the lower equalization actuating is carried out as turn OFF state with not electric power input on the solenoid valve on (A) and (C) of the first solenoid valve  10  while, both (A) and (C) are closed, and the first adsorption column  22  with the second adsorption column  24  is gas funneled, the compressed air of the first adsorption column  22  in a high pressure state is moved to the lower part of the second adsorption column  24  in a flash, the pressure of the first and second adsorption column  22 ,  24  is become equal, and lower equalization is approved 
         [0097]    The upper part equalization operating is proceed with lower part equalization, concurrently, the pressure of first adsorption column  22  is decreased rapidly and the pressure of second adsorption column  24  is increased rapidly thus, the pressure of the first and second adsorption column  22 ,  24  become equal (ST  400 ), finally. 
         [0098]    The reason of the first upper/lower equalization is the compressed air is moved to the first adsorption column  22  or the second adsorption column  24  and carried out the recovery and reproduction of concentrated oxygen through the upper equalization operation, simultaneously, decrease the mechanical loss and improve the efficiency by shortening the operating time of air compressor  9 . 
         [0099]    As illustrated in  FIG. 5   e  is a view of operating state of decompression of the oxygen concentration system according to the present invention. 
         [0100]    As illustrated in  FIG. 5   e,  the pressurized air of the air compressor  9  is supply to inside of the second adsorption column  24  through (C), in the state of closed OFF of the solenoid valve of stage (A) of the first solenoid valve  10 , the second adsorption column  24  is pressurized, and the continued supply of the compressed air is increase the inside pressure of the second adsorption column  24 , steadily; before the open operation of the second check valve  130  (ref.  FIG. 1 ). 
         [0101]    The first adsorption column  22  is not supplied the compressed air from the air compressor  9  thus, the first adsorption column  22  is depressurized (ST 500 ) step by step, the second adsorption column  24  is pressurized to the state of same pressure of the oxygen reservoir  26 , continuously. 
         [0102]    As the same moment, the first adsorption column  22  connected with (C) of the first solenoid valve  10  is funneled to exhaust silencer  2 , the pressure is drop rapidly to nearly to the atmospheric pressure. 
         [0103]    As illustrated in  FIG. 5   f  is a view of the state of cleansing operation of the oxygen concentration system according to the present invention. 
         [0104]    As illustrated in  FIG. 5   f,  the compressed air from the air compressor  9  supply to the second adsorption column  24  continuously, the contained nitrogen component in the air absorbed by zeolite including in the inside of the second adsorption column  24  and produce the concentrated oxygen and supply through the tube (not shown) separately and funneled with oxygen exhaust hole  118 . 
         [0105]    In the time of the pressure of the second adsorption column  24  become equal to the pressure of the inside of the oxygen reservoir  26 , the second check valve  130  is opened to external by the pressure of the concentrated oxygen, while, the high purity concentrated oxygen flows into the first chamber  312  of the chamber part  200  (ref.  FIG. 1 ) through the valve hole  132 . 
         [0106]    The concentrated oxygen influx into the first chamber  312  is supply to the oxygen reservoir  26  of the adsorption bed  20  through the supply hole  116  without leakage to outside by the sealing element  320  (ref.  FIG. 1 ) fitted on the chamber cover  300 . At this time, a portion of the concentrated oxygen produced on the first adsorption column  22  is supply to the second chamber  314  of the chamber part  200  through the second orifice  150  formed on the second groove  114  of the first cover plate  110  ( ref.  FIG. 1 ). 
         [0107]    A portion of the concentrated oxygen supplied to the second chamber  314  is supply to the first adsorption column  22  through the first orifice  140 . 
         [0108]    As above, the concentrated oxygen supplied to the first adsorption column  22  is washing (ST 600 ) the adsorbed nitrogen in the zeolite of the first adsorption column  22  while, the exhaust of the nitrogen through the silencer connected with the first solenoid valve  10  is accomplished. 
         [0109]    The first adsorption column  22  is accomplished the desorption and washing in the state of depressed nearly to the atmospheric pressure.  FIG. 5   g  is a view of operation state of the second upper part equalization according to the present invention. 
         [0110]    As illustrated in  FIG. 5   g,  the concentrated oxygen produced with adsorption is proceed in a constant time followed with compressing of the second adsorption column  24  by the compressed air produced by the air compressor  9  and the second solenoid valve  170  is open actuating to funneled with the first adsorption column  22  and second adsorption column  24  concurrently. 
         [0111]    That is, the electric signal is input on the second solenoid valve  170  mounted on the fitting member  160 , operating ON and opened the 2 port, through the second funnel hole  164  (Ref.  FIG. 1 ) of the second groove  114 , the concentrated oxygen of the second adsorption column  24  moves to the fitting member  160  mounting the second solenoid valve  170  supplies to another port of the second solenoid valve  170  move to one side port and move to the first funnel hole  162  of the first groove  112 . 
         [0112]    The concentrated oxygen moved on the first funnel hole  162  is regurgitated into the first adsorption column  22  as become equal a part of the pressure of the first and second adsorption column  22 ,  24  as proceed to equalization of the second upper part (ST 700 ). 
         [0113]    As illustrated in  FIG. 5   h  is a view of operation state of the second upper/lower part complex equalization according to the present invention. 
         [0114]    The second upper/lower part complex equalization operation (ST 800 ) means the second upper equalization operation and lower equalization operation is proceed concurrently in the state of changed the adsorption action of the first adsorption column  22  and the second adsorption column  24  described in  FIG. 5   d.    
         [0115]    As illustrated in  FIG. 5   h,  the lower part equalization operation is proceed in the state of OFF from not electric input on the solenoid valve mounted on (A) and (C) of the first solenoid valve  10 , both (A) and (C) is closed, through the position (B), the first adsorption column  22  and second adsorption column  24  are funneled to gas communicating and the compressed air of the second adsorption column  24  in a high pressure state moved into the direction to lower part of the first adsorption column  22  instantly and become equal the pressure of the first adsorption column  22  and second adsorption column  24  to approve the lower part equalization 
         [0116]    With it, the second upper part equalization operation is proceed simultaneously with the pressure of the second adsorption column  24  is lowered rapidly and the pressure of the first adsorption column  22  elevated rapidly, the pressure of the first adsorption column  22  and second adsorption column  24  become equal, finally. 
         [0117]    As the above, a part of produced gas uses to recompress through the upper part equalize operating, and compressed air uses to recompress of another adsorption column through the lower part equalize operation thus can be recovery the mechanical energy. 
         [0118]    As illustrated in  FIG. 6  is a graph of pressure distribution chart according to the operation of the oxygen concentration system according to the preferred embodiment of the present invention. 
         [0119]    As illustrated in  FIG. 6 , the pressurized air followed by the operation of the air compressor  9  supplies to the first adsorption column  22  of the oxygen container  20 , the first adsorption column  22  is pressurized to higher pressure and the second adsorption column  24  is not supplied the compressed air thus the pressure is lowered slowly, and the first adsorption column  22  is pressurized continuously then, the concentrated oxygen produced in the time of the first adsorption column  22  and oxygen container  20  become equal pressure. 
         [0120]    The internal pressure of the first adsorption column  22  is lowered a little through the first upper part equalization after the concentrated oxygen produced in the first adsorption column  22  as above, the first and second adsorption column  22 ,  24  is funneled through the first upper/lower part equalization, and the pressure of the first adsorption column  22  is lowered rapidly and the pressure of the second adsorption column  24  is elevated higher, the pressure of the first adsorption column  22  and the pressure of the second adsorption column  24  become equal at once. 
         [0121]    The first adsorption column  22  of which produced the concentrated oxygen funneled with the silencer and pressure drop to the atmospheric pressure and compressed air from the air compressor supplies to the second adsorption column  24 , and the pressure is elevated. 
         [0122]    As the same time, the pressure of the first adsorption column  22  is lowered to nearly to the atmospheric pressure and accomplished the desorption and cleansing and the high purity concentrated oxygen is produced in the second adsorption column  24 . 
         [0123]    After, the high purity concentrated oxygen is produced in the second adsorption column  24 , as above, the supplied compressed air on second adsorption column  24  is supplies to the first adsorption column  22  thus, the second upper part equalization is accomplished with the evenness of upper part pressure of the first adsorption column  22  and second adsorption column  24  became equal. 
         [0124]    As the same time, external air supplied through the lower part of the second adsorption column  24  is supplied through the lower part of the first adsorption column  22  and the second upper/lower part equalization is accomplished and the pressure of the first adsorption column  22  and second adsorption column  24  become equal. 
         [0125]    As described above, the first and second upper/lower part evenness is accomplished, the time of compressing operating of the air compressor is shortened and the efficiency is improved with decrease of the mechanical loss. 
         [0126]    Although a preferred embodiment of the present invention has been described for illustrative purposes, those skilled in the art will be appreciated that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.