Abstract:
A water treatment unit includes any combination of the following filtering and treatment elements such as a vertical pre-filter element, an inner vertical pre-treatment element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction, a second chamber containing a second treatment medium which water to be treated flows in a vertical direction and a third chamber containing a third treatment medium which water to be treated flows in an annular direction. Water treatment unit with a third chamber containing a third treatment medium which water to be treated flows in an annular direction extends the length of water flow path within the water treatment unit significantly. The inlet connector is also provided with different arrangements such that the bottle, with or without the water treatment unit, is suitable for tip up for drinking water and/or drinking water with bottle in a vertical position.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention generally relates to the field of water treatment unit typically includes any combination of the following filtering and treatment elements such as a vertical pre-filter element, an inner vertical pre-treatment element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction, a second chamber containing a second treatment medium which water to be treated flows in a vertical direction and a third chamber containing a third treatment medium which water to be treated flows in an annular direction. The water treatment unit also provides different arrangements of inlet connector such that the bottle is suitable for tip-up for drinking water and/or drinking water with bottle in a vertical position.  
       BACKGROUND OF THE INVENTION  
       [0002]     U.S. Pat. No. 6,193,886 illustrates and describes a bottle mounted water treatment unit located at the top of the bottle with water flowing radically into the water treatment unit. However, air can be ingested through the filter when the bottle is approaching empty. U.S. Pat. No. 5,211,973 illustrates and describes a bottle mounted water treatment unit located at the bottom of the bottle with water flowing into the water treatment unit from the bottom and virtually preventing air from ingesting through the filter when the bottle is approaching empty. U.S. Pat. No. 6,153,096 illustrates and describes another bottle mounted water treatment unit located either at the top or at the bottom of the bottle having a shroud mounted at one end of the filter element and defining an annular siphon space for allowing water to flow into the water treatment unit, thus minimizing the air being ingested through the filter significantly. Notwithstanding, there is still room for improvement.  
         [0003]     It is therefore advantageous to design a water treatment unit to devoid the shortcomings associated with prior art water treatment unit and to improve upon them.  
       SUMMARY OF THE INVENTION  
       [0004]     The water treatment unit of the present invention is cylindrical in shape with outlet tube located at the center of the top surface of the water treatment unit. The water treatment unit is mounted at the top of the bottle with outlet tube of the water treatment unit connected to the outlet tube of the closure device of the bottle.  
         [0005]     The water treatment unit typically includes any combination of the following filtering and treatment elements such as a vertical pre-filter element, an inner vertical pre-treatment element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction, a second chamber containing a second treatment medium which water to be treated flows in a vertical direction and a third chamber containing a third treatment medium which water to be treated flows in an annular direction. The design for allowing water to flow into the unit can be either an up flow design or a down flow design.  
         [0006]     The present invention provides a third chamber containing a third treatment medium which water to be treated flows in an annular direction, thus extending the length of water flow path significantly. For a cylindrical water treatment unit of diameter 2 inches and height 2 inches, the maximum water flow path within the water treatment unit is 2 inches. If the same water treatment unit includes a third chamber containing a third treatment medium which water to be treated flows in an annular direction with mean diameter of annular water flow path 1.5 inches, then just considering the annular post-treatment element only, the length of water flow path is already extended to 4.7 inches (1.5×3.1416).  
         [0007]     The present invention provides an inlet connector located on the bottom of the cylindrical wall of the filter assembly with two inlets—one facing up inlet and one facing down inlet.  
         [0008]     One principal aspect of the present invention is that when putting a tube onto the facing up inlet and covering up the facing down inlet, the design is suitable for tipping up the bottle for drinking water. Conversely, when putting a tube onto the facing down inlet and covering up the facing up inlet, the design is suitable for drinking water with the bottle in vertical position.  
         [0009]     Another principal aspect of the present invention is that when putting a tube with check valve mechanism onto the facing up inlet and another tube also with check valve mechanism onto the facing down inlet, when the bottle is tipped up for drinking water, the check valve mechanism in the tube onto the facing down inlet is activated and the water flow is blocked. Therefore, water is flowing from the facing up tube only. When drinking water with bottle in vertical position, the check valve mechanism in the tube onto the facing up inlet is activated and the water flow is blocked. Therefore, water is flowing from the facing down tube only.  
         [0010]     With modification, the inlet connector located on the bottom of the cylindrical wall of the water treatment unit with only one inlet can be rotated freely.  
         [0011]     One principal aspect of the modified invention is that when the inlet is rotated to a position facing up and putting a tube onto the facing up inlet, the design is suitable for tipping up the bottle for drinking water. Conversely, when the inlet is rotated to a position facing down and putting a tube onto the facing down inlet, the design is suitable for drinking water with bottle in vertical position.  
         [0012]     With another modification, the inlet tube of the water treatment unit is also located at the center of the top surface of the water treatment unit with inner wall of the inlet tube larger than the outer wall of outlet tube. When the bottle is tipped up for drinking water, water will flow into the water treatment unit through the annular gap in between the outer wall of the outlet tube and the inner wall of the inlet tube.  
         [0013]     Accordingly, a preferred embodiment of the present invention provides a water treatment unit integrated in a container for treating water in the container which flows through the water treatment unit. The unit comprises an inlet connector with two inlets attached to the bottom of the unit: with one inlet facing up and the other inlet facing down; whereby when one of the inlets is covered up, then a tube is connected to the other one of the inlets for introducing water to be treated by the unit. It further comprises an outlet tube positioned at the center of the top surface of the unit for discharging water which has been treated by the unit. Furthermore, the unit comprises a first chamber containing a first treatment medium through which water to be treated flows in a radically horizontal direction during treatment; and whereby during treatment water flows from the inlet connector and through the unit and the outlet tube.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]     Advantages and features of the invention will become more apparent with reference to the following description of the presently preferred embodiment thereof in connection with accompanying drawings, wherein like references have been applied to like elements, in which:  
         [0015]      FIG. 1  is a cross-sectional view of a bottle with the water treatment unit showing a tube is attached to the facing up inlet and the facing down inlet is covered up;  
         [0016]      FIG. 2  is a cross-sectional view of a bottle with the water treatment unit showing a tube is attached to the facing down inlet and the facing up inlet is covered up;  
         [0017]      FIG. 3  is a cross-sectional view of a bottle with the water treatment unit showing a tube is attached to the inlet which have been rotated to a facing up position;  
         [0018]      FIG. 4  is a cross-sectional view of a bottle with the water treatment unit showing a tube is attached to the inlet which have been rotated to a facing down position;  
         [0019]      FIG. 5  is a cross-sectional view of a bottle with the water treatment unit showing the bottle is tipped up for drinking water with the check valve mechanism in the tube onto the facing down inlet is activated and the water can flow through the facing up tube only;  
         [0020]      FIG. 6  is a cross-sectional view of a bottle with the water treatment unit showing the bottle is in vertical position with the check valve mechanism in the tube onto the facing up inlet is activated and the water can flow through the facing down tube only;  
         [0021]      FIG. 7  is a cross-sectional view of a bottle without the water treatment unit showing the bottle is tipped up for drinking water with the check valve mechanism in the tube onto the activated facing down inlet and the water can flow through the facing up tube only;  
         [0022]      FIG. 8  is a cross-sectional view of a bottle without the water treatment unit showing the bottle is in vertical position with the check valve mechanism in the tube onto the activated facing up inlet and the water can only flow through the facing down tube only;  
         [0023]      FIG. 9  is a cross-sectional view of a bottle with the water treatment unit showing the bottle is tipped up for drinking water with water flowing into the filter assembly through the annular gap in between the outer wall of the outlet tube and the inner wall of the inlet tube;  
         [0024]      FIG. 10  is an exploded view of a preferred embodiment of water treatment unit including a vertical pre-filter element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction, a second chamber containing a magnetic treatment element and a third chamber containing a third treatment medium which water to be treated flows in an annular direction;  
         [0025]      FIG. 11  is an exploded view of a preferred embodiment of water treatment unit including a vertical pre-filter element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction, a second chamber containing a sub-micorn filter which water to be treated flows in a vertical direction and a third chamber containing a third treatment medium which water to be treated flows in an annular direction;  
         [0026]      FIG. 12  is a cross-sectional view of the down flow design water treatment unit including a vertical pre-filter element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction and a third chamber containing a third treatment medium which water to be treated flows in an annular direction;  
         [0027]      FIG. 13  is a cross-sectional view of the down flow design water treatment unit including a vertical pre-filter element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction and a second chamber containing a magnetic treatment element which water to be treated flows in a vertical direction;  
         [0028]      FIG. 14  is a cross-sectional view of the down flow design water treatment unit including a vertical pre-filter element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction and a second chamber containing a sub-micron filter which water to be treated flows in a vertical direction;  
         [0029]      FIG. 15  is a cross-sectional view of the down flow design water treatment unit including a vertical pre-filter element and a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction;  
         [0030]      FIG. 16  is a cross-sectional view of the down flow design water treatment unit including only a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction;  
         [0031]      FIG. 17  is a cross-sectional view of the up flow design water treatment unit including a vertical pre-filter element, an inner pre-treatment element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction, and a second chamber containing a magnetic treatment element which water to be treated flows in a vertical direction;  
         [0032]      FIG. 18  is a cross-sectional view of the up flow design water treatment unit including a vertical pre-filter element, an inner pre-treatment element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction, a second chamber containing a magnetic treatment element which water to be treated flows in a vertical direction and a third chamber containing a third treatment medium which water to be treated flows in an annular direction;  
         [0033]      FIG. 19  is a cross-sectional view of the up flow design water treatment unit including a vertical pre-filter element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction, and a third chamber containing a third treatment medium which water to be treated flows in an annular direction;  
         [0034]      FIG. 20  is a cross-sectional view of the up flow design water treatment unit including a vertical pre-filter element, a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction, a second chamber containing a magnetic treatment element which water to be treated flows in a vertical direction and a third chamber containing a third treatment medium which water to be treated flows in an annular direction;  
         [0035]      FIG. 21  is a cross-sectional view of the up flow design water treatment unit including a vertical pre-filter element and a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction;  
         [0036]      FIG. 22  is a cross-sectional view of the up flow design water treatment unit including only a first chamber containing a first treatment medium which water to be treated flows in a radically horizontal direction. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0037]     A water treatment unit incorporated in a container for treating water in the container which flows through the unit is disclosed herein. The unit is comprised of an inlet connector with two inlets attached to the bottom such that one inlet facing up and the other inlet facing down. When one of the inlets is covered up, then a tube is connected to the other one of the inlets for introducing water to be treated by the unit. It is also comprised of an outlet tube positioned at the center of the top surface of the water treatment unit for discharging water which has been treated by the unit. The water treatment unit according to the present invention also comprises a first chamber containing a first treatment medium through which water to be treated flows in a radically horizontal direction during treatment; and whereby during treatment, water flows from the inlet connector, through the unit and the outlet tube.  
         [0038]     Referring to  FIG. 1 , a bottle  4  includes a closure device  3  for closing a container  6  used for containing liquids. An outlet connector  411  is provided to cover up water treatment unit  44  and is positioned in between opening of container  6  and closure device  3 . An outlet tube  423  of outlet connector  411  connects water treatment unit  44  to an outlet tube  2  of closure device  3  and is sealed up by an O-ring  5 . Water treatment unit  44  includes a pre-filter element  408 , an inner pre-treatment element  405 , a first chamber  404  containing a first treatment medium which water to be treated flows in a radically horizontal direction and a second chamber  422  containing a second treatment medium which water to be treated flows in a vertical direction. Water flows into water treatment unit  44  through a tube  101 . Tube  101  is connected to a facing up inlet  104  of an inlet connector  102 . Inlet connector  102  is attached to a bottom cover  409  of water treatment unit  44  with a facing down inlet  105  covered up by a cover plate  106 . First, water is up flow through pre-filter element  408 , which is held firmly in a base  414  of water treatment unit  44  by a holding ring  410 . Holding ring  410  has only 8 radical ribs and does not block any water flow. Pre-filter element  408  is a sediment filter of rating from 1 micron to 50 micron and the typical rating is 20 micron. The snap on design of holding ring  410  can be removed from base  414  for taking out and replacing pre-filter element  408 , if needed. Base  414  is connected to a housing  403  of water treatment unit  44  and is sealed up by an O-ring  407 . Then water exits pre-filter element and flows into an inner pre-treatment element  405 . Inner pre-treatment element  405  contains granular filter media  406  in a housing  420  of inner pre-treatment element  405 . Granular filter media can be copper zinc alloy and/or mineral stone such as bakuhan stone or taicho stone (commonly used in Japan). Therefore, water exits inner pre-treatment element  405  and flows radically into a first chamber  404  through the gap in between housing  420  and a bottom cover  412  first and then the gap in between bottom cover  412  and base  414 . A hollow carbon block is used as the treatment medium in the first chamber  404 . The hollow carbon block is mounted in between the top cover  415  and bottom cover  412  and sealed up with inner wall of the housing  421  of the second chamber  422  (not shown) by the O-ring  7  and O-ring  407  respectively. Then water exits the hollow carbon block and flows into the second chamber  422 . The second chamber  422  contains one or more granular filter media in a housing  421  of the second chamber  422 . Granular filter media can be granular quartz  400 , granular magnetite  401 , granular infrared ceramic  402  and annular magnet  413 . Then water exits the second chamber  422  and flows out of water treatment unit  44 . Eventually, water exits bottle  4  through a mouthpiece  1  of closure device  3 .  
         [0039]      FIG. 2  shows the same features as in  FIG. 1 , with tube  101  being replaced by a cover  107  and cover  106  being replaced by a tube  103 .  
         [0040]      FIG. 3  shows the same features as in  FIG. 1 , with inlet connector  102  being replaced by a rotary connector  203  with the inlet facing up and being attached by a tube  202 .  
         [0041]      FIG. 4  shows the same features as in  FIG. 3 , with rotary connector  203  having the inlet facing down and attached by a tube  201 .  
         [0042]      FIG. 5  shows the same features as in  FIG. 1 , with bottle  4  being tipped up and with cover  106  being replaced by tube  103 . A check valve mechanism  242  and a check valve mechanism  246  are integrated into tube  101  and tube  103 , respectively. Check valve mechanism  242  includes a ball  240  with density higher than liquid, a soft plastic seat  241  and a stop plate  140 . Check valve mechanism  246  includes a ball  244  with density higher than liquid, a soft plastic seat  243  and a soft plastic seat  245 . When the bottle  4  is tipped up for drinking water, ball  240  is away from soft plastic seat  241  and is also prevented from coming out of tube  101  by stop plate  140 . Water flows into water treatment unit  44  through tube  101 . At the same time, ball  244  seats firmly onto soft plastic seat  243 , thus preventing water from flowing into water treatment unit  44  from tube  103 .  
         [0043]      FIG. 6  shows the same features as in  FIG. 5 , with bottle  4  being in vertical position. Ball  240  seats firmly onto soft plastic seat  241  and prevents water from flowing into water treatment unit  44  from tube  101 . When drinking water from bottle  4 , ball  243  is away from soft plastic seat  245  and not touching soft plastic seat  243 . Water flows into water treatment unit  44  through tube  103 . When water flow stops, ball  243  seats firmly onto soft plastic seat  245 , thus preventing water already entered water treatment unit  44  from flowing back into container  6 .  
         [0044]      FIG. 7  shows the same features as in  FIG. 5 , but without water treatment unit  44 . A connector  150  is attached to outlet tube  2 . A check valve mechanism  146  and a check valve mechanism  142  are integrated into tube  151  and tube  141 , respectively. Check valve mechanism  146  includes a ball  148  with density higher than liquid, a soft plastic seat  147  and a stop plate  149 . Check valve mechanism  142  includes a ball  144  with density higher than liquid, a soft plastic seat  143  and a soft plastic seat  145 . When the bottle  4  is tipped up for drinking water, ball  148  is away from soft plastic seat  147  and is also prevented from coming out of tube  151  by stop plate  149 . Water flows out of bottle  4  through connector  150  from tube  151 . At the same time, ball  144  seats firmly onto soft plastic seat  143  and prevent water from flowing into connector  150  from tube  141 .  
         [0045]      FIG. 8  shows the same features as in  FIG. 7 , with bottle  4  in vertical position. Ball  148  seats firmly onto soft plastic seat  147  and prevents water from flowing into connector  150  from tube  151 . When drinking water from bottle  4 , ball  144  is away from soft plastic seat  145  and not touching soft plastic seat  143 . Water flows out of bottle  4  through connector  150  and tube  141 . When water flow stops, ball  144  seats firmly onto soft plastic seat  145 , thus preventing water already entered connector  150  from flowing back into container  6 .  
         [0046]     Referring to  FIG. 9 , a bottle  4  includes a closure device  3  for closing a container  6  used for containing liquids. A housing  431  of a water treatment unit  444  is positioned in between container  6  and closure device  3  with an outlet tube  445  of water treatment unit  444  connected to outlet tube  2  of closure device and is sealed up by an O-ring  5 . Water treatment unit  444  includes a pre-filter element  432 , a first chamber  404  containing a first treatment medium which water to be treated flows in a radically horizontal direction, a third chamber  446  containing a third treatment medium which water to be treated flows in an annular direction and a second chamber  422  containing a second treatment medium which water to be treated flows in a vertical direction. An inlet tube  435  of a holding plate  433  is also located at the center of the top surface of water treatment unit  444  with inner wall of inlet tube  435  larger than the outer wall of outlet tube  445 .  FIG. 10  shows details of an exploded view of water treatment unit  444 . When the bottle is tipped up for drinking water, water flows into the filter assembly through the annular gap in between the outer wall of the outlet tube  445  and the inner wall of the inlet tube  435 . First, water flows into water treatment unit  444  through a pre-filter element  432  with inner diameter slightly larger than outer wall of outlet tube  445  of water treatment unit  444  and outer diameter slightly smaller than inner wall of top opening of housing  431  is placed in between a top plate  447  of housing  43  land holding plate  433 . Pre-filter element  432  is a sediment filter of rating from 1 micron to 50 micron and the typical rating is 20 micron. The snap-on design of holding plate  433  can be removed from housing  431  for taking out and replacing pre-filter element  432 , if needed. An annular opening  448  is located on the top plate  447  with inner diameter larger than the first chamber  404  and outer diameter smaller than inner wall of housing  431 .  FIG. 10  shows details of an exploded view of water treatment unit  444 . Then water flows through annular opening  448  into the space between inner wall of housing  431  and outer wall of the first chamber  404 . A hollow carbon block is used as the treatment medium in the first chamber  404 . Then water exits hollow carbon block and flows into a third chamber through an inlet opening  449  of the third chamber  446 . There is a partition plate  450  located adjacent to inlet opening  449  for keeping water flows annularly in clockwise direction for 360 degrees until water reaches an outlet opening  451  on an inner annular wall  452  of the third chamber  446 .  FIG. 10  shows details of an exploded view of water treatment unit  444 . The third chamber  446  contains one or more granular filter media and/or magnet in any shape. Thereafter, water exits the third chamber  446  and flows into a second chamber  422 . The second chamber  422  contains one or more granular filter media in a housing  421  of the second chamber  422 . Granular filter media can be granular quartz  460 , granular magnetite  461 , granular infrared ceramic  462  and annular magnet  463 . Then water exits the second chamber  422  and flows out of water treatment unit  444 . Eventually, water exits bottle  4  through a mouthpiece  1  of closure device  3 .  
         [0047]      FIG. 11  shows the same features as in  FIG. 10 , whereby magnetic treatment element is replaced by sub-micorn filter  455  in a second chamber  422 .  
         [0048]      FIG. 12  shows the same features as in  FIG. 10 , without a second chamber  422 .  
         [0049]      FIG. 13  shows the same features as in  FIG. 10 , without the third chamber  446 .  
         [0050]      FIG. 14  shows the same features as in  FIG. 11 , without annular post-treatment element  446 .  
         [0051]      FIG. 15  shows the same features as in  FIG. 10 , without the third chamber  446  and a second chamber  422 .  
         [0052]      FIG. 16  shows the same features as in  FIG. 10 , without pre-filter element  432 , the second chamber  422  containing the second treatment medium which water to be treated flows in a vertical direction and the third chamber  446  containing a third treatment medium which water to be treated flows in an annular direction.  
         [0053]      FIG. 17  shows the same features as in  FIG. 1 , without bottle  4 .  
         [0054]      FIG. 18  shows the same features as in  FIG. 17 , with additional third chamber  446  containing a third treatment medium which water to be treated flows in an annular direction. Water exits the second chamber  422  and flows into the third chamber  446  through an inlet opening  549  of the third chamber  446 . There is a partition plate  550  located adjacent to inlet opening  549  for keeping water flows annularly in clockwise direction for  360  degrees until water reaches an outlet opening  551  on an inner annular wall  552  of the third chamber  446 . The third chamber  446  contains one or more granular filter media and/or magnet in any shape. Then water exits the third chamber  446  and flows out of water treatment unit  44 . Eventually, water exits bottle  4  through a mouthpiece  1  of closure device  3 .  
         [0055]      FIG. 19  shows the same features as in  FIG. 18 , without inner pre-treatment element  408  and the second chamber  422 .  
         [0056]      FIG. 20  shows the same features as in  FIG. 18 , without inner pre-treatment element  408  and the magnetic treatment element is replaced by sub-micorn filter  464  in the second chamber  422 .  
         [0057]      FIG. 21  shows the same features as in  FIG. 19 , without the third chamber  446 .  
         [0058]      FIG. 22  shows the same features as in  FIG. 21 , without pre-filter element  432 .  
         [0059]     It will also be understood that the preferred embodiments of the present invention, which have been described, are merely illustrative of the principles of the present invention. Numerous modifications may be made by those skilled in the art without departing from the true spirit and scope of the invention.  
       APPENDIX  
       [0060]     Reference numbers for the components of the present invention, as used in the drawings and in the disclosure: 
     2 -outlet tube of closure device  3       3 -closure device      4 -bottle      5 -O-ring      6 -container      7 -O-ring      8 -O-ring      44 -water treatment unit      101 -tube      102 -inlet connector      103 -tube      104 -facing up inlet of inlet connector  102       105 -facing down inlet of inlet connector  102       106 -cover      107 -cover      140 -stop plate      141 -tube      142 -check valve mechanism      143 -soft plastic seat      144 -ball      145 -soft plastic seat      146 -check valve mechanism      147 -soft plastic seat      148 -ball      149 -stop plate      150 -connector      151 -tube      201 -tube      202 -tube      203 -rotary connector      240 -ball      241 -soft plastic seat      242 -check valve mechanism      243 -soft plastic seat      244 -ball      245 -soft plastic seat      246 -check valve mechanism      400 -granular quartz      401 -granular magnetite      402 -granular infrared ceramic      403 -housing of water treatment unit  44       404 -first chamber      405 -inner pre-treatment element      406 -granular filter media      407 -O-ring      408 -pre-filter element      409 -bottom cover      410 -holding ring      411 -outlet connector      412 -bottom cover of a first chamber containing a first treatment medium  404       413 -annular magnet      414 -base      415 -top cover of first chamber  404       420 -housing of inner pre-treatment element  405       421 -housing of second chamber  422       422 -second chamber      423 -outlet tube of outlet connector  411       431 -housing of water treatment unit  444       432 -pre-filter element      433 -holding plate      404 -first chamber      435 -inlet tube of holding plate  433       444 -water treatment unit      445 -outlet tube of water treatment unit  444       446 -third chamber      447 -top plate of housing  431       448 -annular opening on top plate  447       449 -inlet opening of annular post-treatment element  446       450 -partition plate of annular post-treatment element  446       451 -outlet opening of annular post-treatment element  446       452 -inner annular wall of annular post-treatment element  446       422 -second chamber      421 -housing of second chamber  422       455 -sub-micorn filter      456 -O-ring      457 -O-ring      458 -O-ring      412 -bottom cover of first chamber  404       460 -granular quartz      461 -granular magnetite  461       462 -granular infrared ceramic      463 -annular magnet      464 -sub-micorn filter      465 -annular post-treatment element      466 -O-ring      467 -outlet connector      468 -outlet tube of outlet connector  467       469 -O-ring      470 -O-ring      471 -filter element      415 -top cover of first chamber  404       473 -base      474 -bottom cover of first chamber  404       404 -first chamber      476 -O-ring      477 -housing of water treatment  478       478 -water treatment unit      479 -housing of water treatment  480       480 -water treatment unit      481 -sub-micorn filter      482 -O-ring      483 -base      484 -bottom cover of sub-micorn filter  481       485 -O-ring      446 -third chamber      549 -inlet opening of third chamber  446       550 -partition plate of third chamber  446       551 -outlet opening of third chamber  446       552 -inner annular wall of third chamber  446       446 -third chamber      649 -inlet opening of third chamber  446       650 -partition plate of third chamber  446       651 -outlet opening of third chamber  446       657 -O-ring