Patent Publication Number: US-9890529-B2

Title: Sanitary toilet

Description:
This application claims the priority of Korean Patent Application Nos. KR 10-2013-001724, filed on Feb. 19, 2013, KR 10-2013-0019071, filed on Feb. 22, 2013, KR 10-2013-0053584, filed on May 13, 2013, KR 10-2013-0089842, filed on Jul. 29, 2013, and KR 10-2013-0132599, filed on Nov. 2, 2013 in the KIPO (Korean Intellectual Property Office), the disclosure of which is incorporated herein entirely by reference. Further, this application is the National Stage application of International Application No. PCT/KR2013/011809, filed Dec. 18, 2013, which designates the United States and was published in Korean. Each of these applications is hereby incorporated by reference in their entirety into the present application. 
     TECHNICAL FIELD 
     This disclosure relates to a sanitary toilet bowl, and more particularly, to an improved sanitary toilet bowl capable of protecting a human body against bacteria and giving a comfortable environment to a toilet by sucking and removing bad smell and bacteria generated during defecation. 
     BACKGROUND ART 
     Generally, a toilet bowl (which is a western toilet bowl) means a western flush toilet bowl on which a human sits and relieves himself. 
     The toilet bowl generally includes a pedestal on which a human sits to relieve himself, a toilet bowl body for discharging excretion to a septic tank together with a service water, and a water tank provided at a top of one end of the toilet bowl body to supply, store and drain a service water so that excretion is discharged to the septic tank. 
     The toilet bowl is configured to temporarily store and discharge urine and feces discharging from an eliminatory organ of a human who relieves himself, and thus gives seriously bad smell during defecation. Also, it is known that various kinds of pathogenic bacteria, for example salmonellas, colon bacillus, Shigell, clostridium botulinum or the like, tend to breed well, and particularly, it has been reported that  staphylococcus aureus, pseudomonas aeruginosa , monococcus, streptococcus or the like breed at a portion which contacts the human body. 
     However, the pathogenic bacteria may harm a user depending on his physical condition, and the pathogenic bacteria may cause various skin ailments or respiratory ailments and may also give serious displeasure in use. 
     In this regard, many techniques have been disclosed in Korean Unexamined Patent Publication No. 2004-0103432, Korean Unexamined Patent Publication No. 2010-0049464, Korean Unexamined Patent Publication No. 2010-0106892, Korean Patent Registration No. 0568252, Korean Utility Model Registration No. 0393220 or the like. 
     However the techniques disclosed above mostly adopts chemicals, ultraviolet treatment or ultrasonic washing as a deodorizing, sterilizing, pasteurizing or antibacterial means for removing bad smell or pathogenic bacteria, which requires a complicated structure but does not give a great effect in comparison to costs. 
     For this reason, most users prevents pathogenic bacteria from propagating to the entire toilet by manipulating a lever to discharge excretion after closing a toilet bowl cover after defecation. In fact, it has been reported in various papers and mass media that when the toilet bowl cover is closed, the propagation of pathogenic bacteria is reduced in half in comparison to the caser when the toilet bowl cover is not closed. 
     However, since it is inconvenient to close a toilet bowl cover each time, users frequently do not close the toilet bowl cover due to cumbersomeness and troublesomeness. Also, even though it is required to pay an attention to close the toilet bowl cover, users may easily forget this, and thus it is practically not easy to close the toilet bowl cover. 
     Meanwhile, as a technique for removing gas generated during defecation, Korean Utility Model Registration No. 0451717 discloses that a suction hole and a suction line are formed in a toilet bowl sheet, namely in a toilet bowl pedestal, and a circulation tube for sucking and discharging water into/from a water tank is formed, so that when the circulating water circulates through the circulation tube, the gas generated during defecation is absorbed by means of a kind of Venturi effect and thus bad smell is removed. 
     However, in this technique, since a water circulating instrument is installed at an outer portion of the water tank, there are some disadvantageous such as complicated structure and bad appearance. In addition, since a circulation hose should be installed through the water tank, it is not easy to give a watertight structure. For this reason, in spite of excellent technical features, the above technique may not be easily commercialized and may be easily neglected by consumers, which results in bad utilization. 
     In particular, since sucking channels for removing smell are formed in the toilet bowl sheet, there is a structural limit in that the circulating instrument is inevitably provided out of the water tank. 
     Moreover, an aspirator provided to give Venturi effect must have a check valve in order to prevent the circulating water from flowing backward. 
     In addition, at the toilet bowl sheet, namely at the toilet bowl pedestal, as shown in  FIG. 1( a ) , a protrusion  12  is formed to protrude thereon in order to keep a gap when a lower surface of the toilet bowl pedestal  10  is closed in a parallel state. Also, if there is a groove  14  in state where the lower surface of the toilet bowl pedestal  10  is opened as shown in  FIG. 1( b ) , the protrusion  12  is provided to protrude slightly further to the rim of the toilet bowl pedestal  10  inside the groove  14 . For this reason, the existing toilet bowl pedestal  10  inevitably has a gap between the upper surface of the toilet bowl body and the toilet bowl pedestal  10 . 
     Therefore, even though the toilet is flushed to discharge defecation after the toilet bowl cover is closed, bad smell or pathogenic bacteria in the toilet bowl leak through the gap, and thus it is substantially not meaningful to close the toilet bowl cover. 
     DISCLOSURE OF THE INVENTION 
     Technical Problem 
     This disclosure is directed to providing a toilet bowl pedestal for a sanitary toilet bowl, which may have a simple structure to ensure easy installation and use and low manufacture costs, effectively remove bad smell and pathogenic bacteria to protect a human body, and give a pleasant environment to a toilet. 
     Moreover, the present disclosure is also directed to providing a toilet bowl pedestal, which may greatly contribute to environmental improvement of a toilet by ensuring great sealing, when being installed to a general toilet bowl as well as a sanitary toilet bowl, in spite of its simple structure. 
     Technical Solution 
     In one general aspect of the present disclosure, there is provided a sanitary toilet bowl, which includes a toilet bowl body  100 , a water tank T for supplying water to the toilet bowl body  100 , a main supply tube  300  for connecting the water tank T to the toilet bowl body  100 , and an overflow tube  200  connected to one side of the main supply tube  300  and installed in the water tank T to allow water over a predetermined level to overflow to the main supply tube  300 , the sanitary toilet bowl comprising: a valve unit  400  mounted to open or close a top of the overflow tube  200  according to a water level in the water tank T; an air suction tube  500  installed to communicate with the overflow tube  200  through the valve unit  400 ; a circulating pump  700  installed in water of the water tank T and having a circulating water suction tube  710  and a circulating water discharge tube  720  respectively provided at both ends thereof to suck the water stored in the water tank T and discharge the sucked water for circulation; and a Venturi tube  600  installed on the circulating water suction tube  710  or the circulating water discharge tube  720  and connected to the air suction tube  500  perpendicularly to generate an Venturi effect. 
     In addition, in another aspect of the present disclosure, there is provided a sanitary toilet bowl, which includes a toilet bowl body  100 , a water tank T for supplying water to the toilet bowl body  100  to discharge excretion to a septic tank after defecation, and a supply water feeding chamber  130  formed along an upper circumference of the toilet bowl body  100  so that the water supplied from the water tank T partially flows down along an inner wall of the toilet bowl body  100 , the sanitary toilet bowl comprising: an air suction chamber  132  formed in an upper space formed by dividing the supply water feeding chamber  130  into upper and lower spaces by a partition W; a plurality of air suction holes  134  formed along an inner circumference of the air suction chamber  132 ; an air blower  136  configured to suck an inner air of the air suction chamber  132  and discharges the air; and a flexible tube  138  configured to connect the air suction chamber  132  to the air blower  136 . 
     Moreover, in another aspect of the present disclosure, there is provided a sanitary toilet bowl, which includes a toilet bowl body  100 , a water tank T for supplying water to the toilet bowl body  100  to discharge excretion to a septic tank after defecation, and a pedestal body  800  provided between the toilet bowl body  100  and a toilet bowl cover to relieve a seating feeling, the sanitary toilet bowl comprising: an air suction chamber  132  formed along a lower circumference of the pedestal body  800 ; a plurality of air suction holes  134  formed along a circumference of the air suction chamber  132 ; an air blower  136  configured to suck an inner air of the air suction chamber  132  and discharges the air; and a flexible tube  138  configured to connect the air suction chamber  132  to the air blower  136 . 
     Further, in another aspect of the present disclosure, there is provided a sanitary toilet bowl, which includes a toilet bowl body  100 , a water tank T for supplying water to the toilet bowl body  100 , a main supply tube  300  for connecting the water tank T to the toilet bowl body  100 , and an overflow tube  200  connected to one side of the main supply tube  300  and installed in the water tank T to allow water over a predetermined level to overflow to the main supply tube  300 , the sanitary toilet bowl comprising: a valve unit  400  mounted to open or close a top of the overflow tube  200  according to a water level in the water tank T; an air exhaust pipe  900  configured to communicate with the overflow tube  200  through the valve unit  400 ; and an air blower  136  connected to the air exhaust pipe  900  to discharge an air in the toilet bowl body  100  outwards. 
     In addition, in another aspect of the present disclosure, there is provided a sanitary toilet bowl, which includes a toilet bowl body  100 , a pedestal body  800  installed at an opening of the toilet bowl body  100 , and a water tank T for supplying water to the toilet bowl body  100 , the sanitary toilet bowl comprising: an air suction chamber  132  formed in the pedestal body  800  and having a plurality of suction holes; an air blower  136  connected to the air suction chamber  132  and installed at a rear end of the pedestal body  800 ; at least one ultraviolet lamp UVL installed at a lower surface of the pedestal body  800  to irradiate ultraviolet rays for a predetermined time after the air blower  136  stops operation; an air exhaust pipe  900  extending from a discharge end of the air blower  136  and connected into the water tank T; and a bubble generator AIR fixed to an end of the air exhaust pipe  900  and disposed to be soaked in the water tank T. 
     Advantageous Effects 
     According to the present disclosure, it is possible to prevent bacteria and bad smell from propagating, provide more pleasant toilet environment by preventing pathogenic bacteria from spreading to the entire toilet after defecation, and allow easy installation with a simple structure to ensure low manufacture costs, which leads to fabrication of popular toilet bowls. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram showing an existing toilet bowl pedestal. 
         FIG. 2  is a cross-sectional view showing a sanitary toilet bowl according to the first embodiment of the present disclosure. 
         FIG. 3  is a cross-sectional enlarged view showing a valve unit of the sanitary toilet bowl according to the first embodiment of the present disclosure. 
         FIG. 4  is a cross-sectional view showing another example of the valve unit applied to the sanitary toilet bowl according to the first embodiment of the present disclosure. 
         FIG. 5  is a diagram showing an essential part of a toilet bowl pedestal applied to the sanitary toilet bowl according to the first embodiment of the present disclosure. 
         FIG. 6  is a diagram showing another example of the toilet bowl pedestal applied to the sanitary toilet bowl according to the first embodiment of the present disclosure. 
         FIG. 7  is an enlarged view showing an essential part of a sanitary toilet bowl according to the second embodiment of the present disclosure. 
         FIG. 8  is a diagram showing a toilet bowl pedestal applied to the sanitary toilet bowl according to the second embodiment of the present disclosure. 
         FIG. 9  is a cross-sectional view showing a sanitary toilet bowl according to the third embodiment of the present disclosure. 
         FIG. 10  is a cross-sectional view showing a toilet bowl pedestal applied to a sanitary toilet bowl according to the fourth embodiment of the present disclosure. 
         FIG. 11  is a diagram showing a water tank applied to the sanitary toilet bowl according to the fourth embodiment of the present disclosure. 
         FIG. 12  is a graph showing a cavitation phenomenon caused by the generation of ultrasonic waves according to the present disclosure. 
     
    
    
     
       
         
           
               
             
               
                   
               
               
                 [Detailed Description of Main Elements] 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                   
                 100: toilet bowl body 
                 200: overflow tube 
               
               
                   
                 300: main supply tube 
                 400: valve unit 
               
               
                   
                 500: air suction tube 
                 600: Venturi connector 
               
               
                   
                 700: circulating pump 
                 800: pedestal body 
               
               
                   
                   
               
            
           
         
       
     
     MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. 
     Prior to the description, it should be understood that the description proposed herein about specific structures or functions is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the disclosure, so it should be understood that the embodiments could be made implemented in various ways without departing from the scope of the disclosure. 
     In addition, various equivalents and modifications can be made to the embodiments of the present disclosure, and thus specific embodiments will be illustrated in the drawings and described in detail in this specification. However, this is not intended to specially limit the embodiments of the present disclosure, but it should be understood that all changes, modifications and equivalents belonging to the range of the present disclosure fall within the scope of the present disclosure. 
     First Embodiment 
     As shown in  FIGS. 2 and 3 , a sanitary toilet bowl according to the first embodiment of the present disclosure includes a toilet bowl body  100 . 
     The toilet bowl body  100  has a structure well known in the art and is configured to store a certain amount of water therein and discharge excretion generated by a user to a sewage tank through a drainage hole  110  by using the stored water. 
     At this time, the water utilized for discharging the excretion to the sewage tank, namely a septic tank, is a service water stored in a water tank T provided at a top of one side of the toilet bowl body  100 , similar to an existing technique, and its connection structure is also identical to an existing one. 
     In particular, since impurities and urine splashing during defecation are stuck to an inner wall of the toilet bowl body  100 , a plurality of injection holes  120  are formed in an inner circumference of the top of the toilet bowl body  100  and arranged in a circumferential direction to wash out the impurities and urine. Also, the injection hole  120  is connected to a supply water feeding chamber  130 , and the supply water feeding chamber  130  is connected to the water tank T to supply water together when service water is supplied. 
     The present disclosure uses such a basic structure of an existing toilet bowl body  100  and is configured to effectively remove bad smell and pathogenic bacteria generated during defecation by sucking bad smell and pathogenic bacteria generated in the toilet bowl body  100  through an overflow tube  200 , dissolving and removing them in the water tank T, and then discharging them to a septic tank through a drainage hole  110  when excretion is discharged. 
     For this, the present disclosure uses the overflow tube  200  provided at the water tank T which stores water used for discharging excretion. 
     When a water level in the water tank T reaches a certain level, the overflow tube  200  allows the water to overflow to the toilet bowl body  100  so that the water does not run over the water tank T. 
     The overflow tube  200  is generally connected to one side of a main supply tube  300 , which allows the water in the water tank T to flow to the toilet bowl body  100 . Also, a stopper  310  connected to an actuating lever  330  is installed at a top of the main supply tube  300 , and thus if the user presses the actuating lever  330  to flush the toilet after defecation, the stopper  310  is opened so that the water in the water tank T flows to the toilet bowl body  100  while keeping a hydraulic pressure constantly to discharge excretion to a septic tank. 
     In addition, if the water level is lowered, an external supply tube  340 , namely a portion connected to a water pipe P, is opened so that water is supplied from the outside to fill the water tank T. If the water level reaches a certain level, a float  320  is lifted to close a supply valve (with no reference symbol) to stop supply of water. Also, the stopper  310  closes the top of the main supply tube  300  again by its weight. 
     The above structure and operations are substantially identical to those of an existing toilet bowl. 
     At this time, the main supply tube  300  is vacant at ordinary time but allows water to flow only when discharging excretion, and the overflow tube  200  is also filled with water only at overflowing. Therefore, there is no problem in inhaling or exhausting gas through these tubes at ordinary time. 
     The present disclosure has prepared in this consideration of the above situations, and thus in the present disclosure, for example, a valve unit  400  is mounted to a top of the overflow tube  200 . 
     As shown in  FIG. 3 , the valve unit  400  includes a valve sheet  410  having a sealing material  412  capable of sealing an open top of the overflow tube  200 , a floating body  420  provided at both sides of the valve sheet  410  or an outer side of a rotary body, a valve body  460  guided to allow the valve sheet  410  to move vertically, a spring  430  interposed into the valve body  460  and located at an upper portion of the valve sheet  410 , a stationary plate  440  fixed to a top of the valve body  460 , an exhaust port  450  configured to communicate with the overflow tube  200  through the stationary plate  440  and the valve body  460 , and a makeup water feeding hole WSS configured to communicate with the overflow tube  200  through the valve sheet  410 . 
     In addition, a flexible air suction tube  500  is installed at the exhaust port  450 , and the air suction tube  500  extends into the water in the water tank T and is connects to a Venturi connector  600  of  FIG. 2 , installed in the water tank T. 
     At this time, the Venturi connector  600  includes a suction tube  610  and a discharge tube  620  respectively provided at right and left sides thereof, and a connection tube  630  protruding on an upper portion of the Venturi connector  600 . Also, the air suction tube  500  is connected onto the connection tube  630 , and a Venturi channel  640  is provided in the Venturi connector  600  where the connection tube  630  is formed, thereby giving a Venturi effect. 
     In other words, a channel at a center of a path where circulating water flows in and out is narrowed to give a difference in flow rates, and at the center portion, the channel is slightly bent toward a discharging end, thereby configuring the Venturi channel  640 . The Venturi channel  640  gives a Venturi effect, and in other words, a fluid on the Venturi channel  640  is naturally sucked therein due to a pressure difference according to Bernoulli&#39;s theorem. Such a Venturi structure is well known in the art and thus is not described in detail here. 
     In addition, the Venturi connector  600  may be installed at any one of the circulating water suction tube  710  and the circulating water discharge tube  720 , and also a suction end  610  and a discharge end  620  are provided at both ends of the Venturi connector  600  for connection and installation thereof. 
     Also, the circulating water suction tube  710  is connected to a sucking end of a circulating pump  700 , and the circulating water discharge tube  720  is connected to a discharging end of the circulating pump  700 . 
     In addition, as shown in  FIG. 2 , the circulating pump  700  may be fixed to a bottom of the water tank T. 
     However, the circulating pump  700  may not be fixed to a bottom of the water tank T, as long as water may circulate in the water tank T. 
     Moreover, the circulating water suction tube  710  and the circulating water discharge tube  720  are placed freely in the water tank T. 
     However, the circulating water suction tube  710  and circulating water discharge tube  720  may be suitably fixed not to float over the water surface when the circulating pump  700  is in operation. 
     Moreover, in the present disclosure, since the air suction tube  500  is vertically connected to an upper side of the Venturi connector  600 , it is not needed to provide a check valve to prevent a back flow, which leads to a simple structure, easy fabrication, very efficient operation and effective suction and discharge. 
     In addition, a switch may be provided so that the circulating pump  700  may be selectively operated before defecation, during defecation and after defecation. Here, a manual switch may be used so that the circulating pump  700  is operated according to the selection of the user. 
     Moreover, it is also possible that the circulating pump  700  is automatically operated when a user is at a predetermined distance from the toilet bowl body  100  before and after defecation, by using a sensor such as a temperature sensor or an approach sensor. 
     Further, though not shown in the figures, a solenoid valve may be further mounted to the valve unit  400 , so that the valve unit  400  is closed at ordinary time but is opened during or after defecation to suck and discharge bad smell and pathogenic bacteria. 
     In addition, by applying a combination of the sensor and the solenoid valve mentioned above, it is also possible that the actuating lever  330  is not provided but the stopper  310  is automatically opened to supply water for discharging excretion when a user stands up after defecation. 
     Meanwhile, the valve unit  400  may be modified as shown in  FIG. 4 . 
     For example, in the configuration of  FIG. 4 , when the valve sheet  410  is opened or closed according to a water level by using the floating body  420 , the floating body  420  and the valve sheet  410  may be operated using a hinge. 
     In other words, the valve unit  400  may be configured to operate in the same way as shown in  FIG. 3  by providing a support  470  fixed to one side of the overflow tube  200  and having a ‘L’ shape, fixing an end of a lever  422  for fixing the floating body  420  to a top of the support  470  by a hinge H, simultaneously fixing the valve sheet  410  to a part of the lever  422  by a hinge, and providing an exhaust port  450  communicating with the overflow tube  200  through the valve sheet  410  and a makeup water feeding hole WSS communicating with the overflow tube  200  through the valve sheet  410  so that the valve sheet  410  does not interfere in a hinged portion of the lever  422 . 
     In addition, the sucking and discharging structure applied to  FIG. 3  may also be identically applied to the exhaust port  450  of the valve unit  400  configured as shown in  FIG. 4 . 
     If the sanitary toilet bowl according to the present disclosure configured as above is used, when a user seats on the toilet bowl for defecation, this is instantly detected and the circulating pump  700  is operated to give a Venturi effect. 
     If so, the air in the air suction tube  500  connected to the Venturi connector  600  is sucked to the Venturi connector  600 , and this resultantly leads to suction of an inner air of the toilet bowl body  100  through the overflow tube  200  and the main supply tube  300 . 
     Therefore, bad smell generated during defecation is carried to the air suction tube  500  together with air containing pathogenic bacteria, and then is repeatedly discharged and sucked in the water of the water tank T together with a circulating water so as to be dissolved and removed therein. Finally, when the user presses the actuating lever  330  to discharge the water in the toilet bowl to a septic tank after defecation, the bad smell and the pathogenic bacteria are discharged together. Therefore, bad smell and pathogenic bacteria do not propagate in the toilet but are perfectly removed cleanly, thereby giving a more pleasant toilet environment. 
     In other words, bad smell and pathogenic bacteria which are in a full level after initiating defecation are rapidly reduced, and when defection is finished, bad smell and pathogenic bacteria do not substantially propagate. Since this process is performed automatically, the user does not feel inconvenience. 
     By doing so, it is expected to enhance the health of families, prevent various skin ailments, and eliminate inconvenience caused by closing a toilet bowl cover whenever using a toilet. Thus, in the aspect of the entire nation, it is expected to enhance the health of citizens. 
     In addition, on occasions, after excretion is discharged, bad smell and pathogenic bacteria may be sucked and discharged once more, which may give a further pleasant toilet space. 
     Moreover, the sanitary toilet bowl may employ a toilet bowl pedestal as shown in  FIG. 5 . 
     The toilet bowl pedestal includes a pedestal body  800 , which may have various shapes and configurations known in the art. 
     In addition, the pedestal body  800  has an opening  810  formed at a center thereof to have a certain shape, and the opening  810  serves as a passage through which a user may defecate. 
     Moreover, protrusions  820  are formed on a lower surface of the pedestal body  800  and arranged in a circumferential direction, similar to an existing technique. 
     These protrusions  820  support the toilet bowl body  100  in contact in a circumferential direction when the pedestal body  800  is lowered and placed on the upper surface of the toilet bowl body  100 , thereby keeping a gap between the pedestal body  800  and the toilet bowl body  100 . 
     In this structure, in the present disclosure, a sealing member  830  for sealing a space between the protrusions  820  may be further provided. 
     The sealing member  830  may have a band shape as depicted in the figures, and the sealing member  830  may be made of flexible material such as rubber or silicon to enhance a sealing force. 
     Moreover, the sealing member  830  may be detachably provided for easy cleaning, which may further enhance sanitation. In addition, when being worn out, the sealing member  830  may be easily exchanged by the user, which may reduce maintenance costs. 
     In this case, the detachable structure may adopt various known techniques such as fitting into a groove, adhering using a double-sided adhesive tape or the like. 
     In addition, as shown in an enlarged view of  FIG. 5 , a fixing groove  822  may be formed in the protrusion  820 , and the sealing member  830  may be forcibly fit into the fixing groove  822 . In this case, the sealing member  830  may have an oval shape convex in a vertical direction, which is elastically deformed to enhance a sealing force when being pressed by the user who seats thereon. 
     Moreover, as shown in  FIG. 6 , when a young child seats on the toilet bowl, a space is generated in a rear area between the butt of the young child and the pedestal body  800 . Therefore, if the auxiliary pedestal  840  is provided, the young child may have a good seating feeling, and also pathogenic bacteria may be sucked and removed more efficiently. 
     At this time, the auxiliary pedestal  840  may be detachably provided to the pedestal body  800 , and the detachable structure may include a simple detachable structure such as fitting, or a pivotal detachable structure connected to the pedestal body  800  by a hinge. 
     By doing so, even when a young child uses the toilet bowl, pathogenic bacteria may be sucked and removed efficiently, which may greatly contribute to improvement of a sanitary environment of the toilet. 
     Second Embodiment 
     As shown in  FIGS. 7 and 8 , a sanitary toilet bowl according to the second embodiment of the present disclosure is modified so that an air curtain serving as a kind of shield is formed at the toilet bowl body  100  to prevent bad smell and pathogenic bacteria from propagating out of the toilet bowl body  100 . 
     In other words, the sanitary toilet bowl according to the second embodiment of the present disclosure rapidly sucks and discharges the air in the toilet bowl body  100  during or after defecation to temporarily block the inside of the toilet bowl body  100  from a toilet, thereby giving an air curtain function. By doing so, it is possible to prevent bad smell and pathogenic bacteria from rapidly propagating in the room, and thus it is possible to give more pleasant toilet environment with less harm to a human body. 
     For this, as shown in  FIG. 7 , in the toilet bowl body  100  according to the second embodiment of the present disclosure, the supply water feeding chamber  130  is partitioned into upper and lower areas by using a partition W so that the lower area is utilized as the supply water feeding chamber  130 , similar to the former embodiment, and the upper area is utilized as an air suction chamber  132 . 
     In addition, a plurality of air suction holes  134  communicating with the air suction chamber  132  are formed along an inner circumference of the top of the toilet bowl body  100 , similar to the injection holes  120 . 
     Also, the air suction chamber  132  is connected to an air blower  136 . 
     At this time, the air blower  136  may be included in the toilet bowl body  100 , or installed out of the toilet bowl body  100  as shown in the figure. In addition, a power source of the air blower  136  may be prepared by drawing a power source of a ventilator (not shown) which is already installed at the toilet. 
     Moreover, the air suction chamber  132  and the air blower  136  of the toilet bowl body  100  are connected to each other by a flexible tube  138  so that the air in the air suction chamber  132  is sucked into the air blower  136 . For example, in case of a toilet newly built, the flexible tube  138  may be buried in a wall and connected to a ventilation hole through the wall. Also, in case of an existing toilet, the flexible tube  138  may be fixed along a wall or ceiling and connected to a ventilation hole through a pipe. 
     As another example, the flexible tube  138  may be drawn into the water tank T, which stores a service water for discharging excretion, instead of a ventilation hole, and then a bubble generator (not shown) may be installed at an end of the flexible tube  138  so that a sucked air containing bad smell and pathogenic bacteria, which has been sucked during defecation, is diluted in the water tank T together with bubbling and then discharged to a septic tank together with excrement. 
     If bad smell and pathogenic bacteria are drawn into the water tank T and discharged as described above, bad smell and pathogenic bacteria are not directly discharged to the air, but are discharged to a septic tank together with excrement after staying in the water tank T. For this reason, the possibility that bad smell or pathogenic bacteria is introduced into the toilet is extremely low, which gives better effects in aspect of environment and harmlessness to a human body. 
     Moreover, a switch may be provided to selectively operate the air blower  136  before defecation, during defecation and after defecation. Here, a manual switch may be used so that the air blower  136  is operated according to the selection of the user. 
     However, the switch may also employ a motion sensor switch or a pressure sensor switch, without being limited to a manual switch, namely an on/off switch known in the art. In addition, a sensor employed in the switch may be installed on a wall of the upper portion of the water tank T, and an installation location of the switch may be varied according to the kind of the switch as described later. 
     If the switch is a motion sensor switch, the switch turns on/off a power by detecting a motion of the user to operate or stop the air blower  136 . If the switch is a pressure sensor switch, the switch detects a pressure when the user seats on the toilet bowl body  100 , and if the applied pressure is greater than a predetermined level, the switch automatically allows the air blower  136  to operate, but if the pressure is released, the switch allows the air blower  136  to stop operation. At this time, a pressure is detected when the user seats on the toilet bowl body  100 , and this means that when the user seats on the pedestal body  800 , a pressure sensor S (see  FIG. 8 ) buried near the switch detects a pressure by the weight of the user at a portion where the pedestal body  800  contacts the top surface of the toilet bowl body  100 . 
     In addition, a sterilizing solution may be supplied to the supply water feeding chamber  130  when the air blower  136  operates, which may give a sterilizing or pasteurizing function together. 
     Moreover, the air curtain employed in the sanitary toilet bowl according to the second embodiment of the present disclosure may also be implemented at the pedestal body  800  as shown in  FIG. 8 . 
     In this case, the pedestal body  800  may be provided to a dedicated toilet bowl pedestal with an air curtain suction structure, or the pedestal body  800  may be added to an existing toilet bowl pedestal which is already put in the market. However, the dedicated toilet bowl pedestal may be prepared by molding the air suction chamber  132  together with a pedestal to have an integral form as shown in  FIG. 8 , and a plurality of air suction holes  134  may be formed therein. 
     In addition, the pressure sensor S may be included in the pedestal body  800  so that the air blower  136  is operated by detecting a pressure change caused when the user seats on the pedestal body  800 . 
     In this case, the air blower  136  may be included or buried in a lower portion of the rear side of the pedestal body  800 . 
     Third Embodiment 
     As shown in  FIG. 9 , a sanitary toilet bowl according to the third embodiment of the present disclosure is modified so that the overflow tube  200  provided at the water tank T is utilized to discharge bad smell and pathogenic bacteria. 
     In other words, the overflow tube  200  is generally connected to one side of the main supply tube  300 , which allows water in the water tank T to flow to the toilet bowl body  100 . Also, the stopper  310  connected to the float  320  is installed at the top of the main supply tube  300 . Here, if the user presses lever  330  to discharge the water after defecation, the float  320  is lifted to open the stopper  310  so that the water in the water tank T flows to the toilet bowl body  100  while keeping a constant hydraulic pressure to discharge excretion to a septic tank. 
     In addition, if a water level is lowered, a portion connected to a water pipe P (see  FIG. 2 ) is opened so that water is supplied from the outside to fill the water tank T. If the water level reaches a certain level, the supply of water is stopped, and the stopper  310  closes the top of the main supply tube  300  due to its weight. 
     At this time, the main supply tube  300  is vacant at ordinary time but allows water to flow only when discharging excretion, and the overflow tube  200  is also filled with water only at overflowing. Therefore, there is no problem in inhaling or exhausting gas through these tubes at ordinary time. 
     In this consideration, in the sanitary toilet bowl according to the third embodiment of the present disclosure, the valve unit  400  illustrated in  FIGS. 3( a )  and  4  may be mounted to the top of the overflow tube  200 , an air exhaust pipe  900  may be connected to an exhaust port  450  of the valve unit  400  and drawn out of the water tank T, and then the air exhaust pipe  900  may be connected to an air blower  136  at the exterior and drawn out of the toilet through a ventilation hole installed at the toilet. 
     At this time, the air blower  136  may be included in the toilet bowl body  100 , or may be installed out of the toilet bowl body  100  as depicted in the figure. 
     In this case, the air exhaust pipe  900  may be prepared to have a thin and flat shape so as to cause no problem when being drawn out through a gap (within a processing error range) created when a lid of the water tank T is coupled. In addition, in case of a toilet newly built, the air exhaust pipe  900  may be buried in a wall and connected to a ventilation hole. Also, in case of an existing toilet, the air exhaust pipe  900  may be fixed along a wall or ceiling and connected to a ventilation hole through a pipe. 
     As another example, the air exhaust pipe  900  may be drawn into the water tank T, which stores a service water for discharging excretion, instead of a ventilation hole and connected to an air blower  136 ′ in the water, and then a bubble generator AIR may be installed at an end of the air exhaust pipe  900  so that a sucked air containing bad smell and pathogenic bacteria, which has been sucked during defecation, is diluted in the water tank T together with bubbling and then discharged to a septic tank together with excrement. 
     If bad smell and pathogenic bacteria are drawn into the water tank T and discharged as described above, bad smell and pathogenic bacteria are not directly discharged to the air, but are discharged to a septic tank together with excrement after staying in the water tank T. For this reason, the possibility that bad smell or pathogenic bacteria is introduced into the toilet is extremely low, which gives better effects in aspect of environment and harmlessness to a human body. 
     Fourth Embodiment 
     As shown in  FIG. 10 , a sanitary toilet bowl according to the fourth embodiment of the present disclosure is modified to further include at least one ultraviolet lamp UVL provided at a part of a lower surface of the toilet bowl pedestal employed in the former embodiment, namely the pedestal body  800 . 
     At this time, the ultraviolet lamp UVL is a lamp for irradiating sterilizing rays of 185.7 nm, and the ultraviolet lamp UVL receives a power to irradiate sterilizing rays for a certain time so that a small amount of residual bad smell and pathogenic bacteria not sucked or discharged but remaining in the toilet bowl body  100  is sterilized, decomposed and removed. 
     For this, the ultraviolet lamp UVL may be controlled to turn on only when bad smell and pathogenic bacteria in the toilet bowl body  100  are sucked and discharged. 
     In other words, the ultraviolet lamp UVL may be designed to irradiate ultraviolet rays within a relatively short time in a state where a user does not seat on the toilet bowl, in consideration of harmfulness of ultraviolet rays to a human, and just operate only when a toilet bowl cover (not shown) provided above the pedestal body  800  is closed. In addition, control logic may be designed to eject water once again into the toilet bowl after irradiating ultraviolet rays. These configurations may be selectively designed depending on specifications of the toilet bowl. 
     Moreover, the ultraviolet lamp UVL may be installed on the air suction chamber  132  to sterilize the inside of the air suction chamber  132  as well as the inside of the toilet bowl body  100 , when performing a sterilizing action. 
     In addition, if the bubble generator AIR is installed in the water tank T as shown in  FIG. 11 , an ultrasonic generator UT may be installed at one outer side of the water tank T, and when the bubble generator AIR operates, namely when the air blower  136  operates, the ultrasonic generator UT may operate simultaneously. In this case, bad smell and pathogenic bacteria may be dissolved more efficiently. 
     This uses a cavitation phenomenon caused by the generation of ultrasonic waves. The cavitation phenomenon means that, if a strong ultrasonic wave is irradiated into liquid, the ultrasonic wave forms a pressure wave and enhances solvency by promoting generation and extinction of bubbles while repeatedly exhibiting a compression force (positive pressure) and an expansion force (negative pressure) as shown in  FIG. 12 . 
     In other words, during a negative pressure period, bubbles are generated around fine impurities in the liquid, and these bubbles become extinct at a next compression period. Such bubbles are repeatedly generated and extinct tens of thousands of times per one second, during which diameters of the bubbles gradually increase. 
     If this phenomenon is shared with the bubble generator AIR, the effect increases several times. In this case, bad smell and pathogenic bacteria sucked and discharged by the toilet bowl of the present disclosure may be perfectly dissolved and removed in the water tank T, and newly generated bubbles have no bad smell and no pathogenic bacteria. 
     Moreover, a sucking and discharging structure may be configured to extend to an outdoor place along a toilet air exhaust pipe, instead of the water tank T, and this is just another modification. 
     In other words, a sanitary toilet bowl according to the fourth embodiment of the present disclosure includes an air blower  136  connected to the air suction chamber  132  and installed at a rear end of the pedestal body  800 , a ultraviolet lamp UVL designed to irradiate ultraviolet rays only for a certain time after the air blower  136  stops operation, and an air exhaust pipe  900  extending from a discharge end of the air blower  136  and connected into the water tank T, wherein a bubble generator AIR disposed to be soaked in the water tank T is installed at an end of the air exhaust pipe  900 . 
     As described above, in the present disclosure, bad smell and pathogenic bacteria are discharged to the water tank T, perfectly dissolved therein, and then discharged to a septic tank together with excretion. Therefore, the possibility that bad smell or pathogenic bacteria is introduced into the toilet is extremely low, which gives better effects in aspect of environment and harmlessness to a human body. 
     Further, since a sterilizing function by irradiation of ultraviolet rays is added to the toilet bowl body  100 , the toilet culture becomes more sanitary and cleaner, and it is also possible to prevent skin diseases, skin allergies or the like, caused by pathogenic bacteria.