Drainage device for siphon action toilet

Abstract

A toilet 10 has a bowl 20 , a connection pathway 31 , an ascending pathway 32 , and a descending pathway 33 across a weir 34 . The descending pathway 33 includes an expanded section 33 a having a greater pipeline diameter and a tapered end 33 b having a narrower opening area than that of the expanded section 33 a , and is connected with a drain socket 70 . The drain socket 70 has an inner drain conduit socket member 72 that is attached to be located inside a drain conduit 90 . The inner drain conduit socket member 72 has an extended socket section 75 , which is located below a floor surface FL of a lavatory and has a greater pipeline diameter, and a tapered conduit section 76 , which has a narrowed diameter. These sections 75 and 76 constitute a siphon action induction module.

1 . A drainage device of a toilet, comprising: 
 a drain socket that has a flow inlet connecting with a drainage port of a toilet body, a flow outlet connecting with a drain conduit leading to sewer, and a socket flow path connecting the flow inlet with the flow outlet in an eccentric layout; and    a restriction element that is formed integrally with the drain socket and causes a flow of cleansing water flowing through the socket flow path to be temporarily retained, so as to induce a siphon action.    
     
     
         2 . A drainage device of a toilet in accordance with  claim 1 , wherein the restriction element has a restricted flow path that is eccentric to the socket flow path with the restriction element.  
     
     
         3 . A drainage device of a toilet in accordance with  claim 1 , wherein the restriction element is located in a neighborhood of the flow outlet.  
     
     
         4 . A drainage device of a toilet in accordance with  claim 1 , wherein the drain socket comprises a fixation unit that is fixed to a floor surface, the socket flow path has a conduit that is located below the fixation unit and has an outlet inserted in the drain conduit, and the restriction element is disposed in the conduit.  
     
     
         5 . A drainage device of a toilet in accordance with  claim 1 , wherein the restriction element is formed separately from the drain socket, 
 the drainage device further comprising an attachment module that detachably attaches the restriction element to the drain socket.    
     
     
         6 . A drainage device of a toilet in accordance with  claim 1 , wherein the toilet comprises a toilet restriction unit in a neighborhood of a drainage port.  
     
     
         7 . A drainage device of a toilet in accordance with  claim 6 , wherein the toilet restriction unit is located to be eccentric to the flow inlet.  
     
     
         8 . A drainage device of a toilet, comprising: 
 a drain socket having a toilet connection member with a flow inlet that connects with a drainage port of a toilet body, a drain conduit connection member with a flow outlet that connects with a drain conduit leading to sewer; and a socket flow path that connects the flow inlet with the flow outlet; and    a cleansing water retention module that is formed separately from the drain socket, is fixed to the drain socket, and causes a flow of cleansing water flowing through the socket flow path to be temporarily retained, so as to induce a siphon action.    
     
     
         9 . A drainage device of a toilet in accordance with  claim 8 , wherein the cleansing water retention module is designed to change a flow path area in a flow direction of cleansing water.  
     
     
         10 . A drainage device of a toilet in accordance with  claim 9 , wherein the cleansing water retention module is located in the socket flow path and is designed to continuously decrease a flow path area from an upstream side to a downstream side.  
     
     
         11 . A drainage device of a toilet in accordance with  claim 8 , wherein the cleansing water retention module comprises a restriction element that narrows a flow path area of the socket flow path.  
     
     
         12 . A drainage device of a toilet in accordance with  claim 11 , wherein the restriction element is formed to reduce its flow path area from an upstream side to a downstream side.  
     
     
         13 . A drainage device of a toilet in accordance with  claim 11 , wherein the cleansing water retention module has an enlarged flow path, which is formed upstream of the restriction element to have a greater flow path area.  
     
     
         14 . A drainage device of a toilet in accordance with  claim 11 , wherein the restriction element is provided in a neighborhood of the flow outlet.  
     
     
         15 . A drainage device of a toilet in accordance with  claim 11 , wherein the cleansing water retention module has a plurality of the restriction elements arranged along a flow of cleansing water.  
     
     
         16 . A drainage device of a toilet in accordance with  claim 8 , wherein the cleansing water retention module comprises a fixation unit that is positioned and fixed to the drain socket.  
     
     
         17 . A drainage device of a toilet in accordance with  claim 8 , wherein the drain socket has the socket flow path that connects the flow inlet with the flow outlet in an eccentric layout, and the cleansing water retention module is disposed in the socket flow path.