Siphon jet toilet

Abstract

A siphon jet toilet for supplying flush water in a storage tank by using the head pressure thereof is disclosed. The siphon jet toilet has a toilet main unit furnished with a bowl portion, a rim water spout, a drain trap passage for expelling waste using siphon action, a jet water spout opening formed at a position opposite the inlet of the drain trap passage, a rim water channel for supplying flush water to the rim water spout opening, and a jet water channel for supplying flush water to the jet water channel. The jet water channel includes a plurality of branched water conduits, a merging portion for causing flush water from the plurality of branched water conduits to merge and swirl toward the jet water spout opening and a flow aligner for aligning the flow of flush water merged in the merging portion. The merging portion including an outer wall portion formed in essentially a straight line so that flush waters in the outer region of the swirl collide head-on and an inner wall portion on which a bent portion is formed so that flush water in the inner region of the swirl flows smoothly toward the jet water spout opening.

1 . A siphon jet toilet for supplying flush water in a storage tank by using the head pressure thereof, comprising:
 a toilet main unit furnished with a bowl portion having a waste receiving surface;   a rim water spout formed on the top edge of the bowl portion;   a drain trap passage provided at the bottom portion of the bowl portion for expelling waste using siphon action;   a jet water spout opening formed at a position opposite the inlet of the drain trap passage on the bowl portion;   a rim water channel for supplying the flush water in the storage tank to the rim water spout opening; and   a jet water channel for supplying the flush water in the storage tank to the jet water channel;   said jet water channel including a plurality of branched water conduits branched from the upstream side toward the downstream side thereof, a merging portion for causing the flush waters from the plurality of branched water conduits to merge and swirl toward the jet water spout opening and a flow aligner for aligning the flow of the flush water merged in the merging portion;   said merging portion including an outer wall portion formed in essentially a straight line so that the flush waters in the outer region of the swirl collide head-on and an inner wall portion on which a bent portion is formed so that flush water in the inner region of the swirl flows smoothly toward the jet water spout opening.   
   
   
       2 . The siphon jet toilet according to  claim 1 , wherein the curved portion of the inner wall portion on the merging portion has a curvature radius in the range of 15 mm-30 mm as seen in planar view. 
   
   
       3 . The siphon jet toilet according to  claim 1 , wherein the flow aligner has a predetermined length in the horizontal direction and is formed to extend in essentially the horizontal direction toward the drain trap passage. 
   
   
       4 . The siphon jet toilet according to  claim 2 , wherein the flow aligner has a predetermined length in the horizontal direction and is formed to extend in essentially the horizontal direction toward the drain trap passage. 
   
   
       5 . The siphon jet toilet according to  claim 1 , wherein the volume of flush water stored in the storage tank is in the range of 2.5 liters to 6.5 liters. 
   
   
       6 . The siphon jet toilet according to  claim 2 , wherein the volume of flush water stored in the storage tank is in the range of 2.5 liters to 6.5 liters. 
   
   
       7 . The siphon jet toilet according to  claim 3 , wherein the volume of flush water stored in the storage tank is in the range of 2.5 liters to 6.5 liters. 
   
   
       8 . The siphon jet toilet according to  claim 4 , wherein the volume of flush water stored in the storage tank is in the range of 2.5 liters to 6.5 liters.