Heat storage tank

Abstract

A heat storage tank 10 includes a heat a body valve 4 having an inflow side passage 41 and an outflow side passage 42 and fitted into an open portion 11 of the heat storage tank, a center pipe 5 communicating with the outflow side passage and extending substantially vertically inside the tank and a mixing prevention plate 6, 60 for preventing mixing of cold water flowing in and hot water stored, wherein a through-hole 63 penetrating through the center pipe and a large number of flow holes 64 are formed in the mixing prevention plate, and the prevention mixing plate has a diameter D 2 smaller than a diameter D 1 of the open portion 11 of the tank.

1 . A heat storage tank having a heat insulating structure equipped with a storage portion (T) for storing therein a fluid while retaining its heat, comprising: 
 a body valve having an inflow side passage for causing the fluid to flow into said heat storage tank and an outflow side passage for causing the fluid stored in said heat storage tank to flow outside, and fitted into an open portion of said heat storage tank positioned below the storage portion in the direction of gravity;    a center pipe communicating with said outflow side passage and extending substantially vertically inside said storage portion; and    a mixing prevention plate arranged inside said heat storage tank, for preventing mixing of the fluid flowing in and the fluid stored;    wherein a through-hole penetrating through said center pipe and a large number of flow holes for allowing the passage of the inflowing fluid are formed in said mixing prevention plate, and said prevention mixing plate is shaped into a diameter D 2  smaller than a diameter D 1  of said open portion.    
   
   
       2 . A heat storage tank according to  claim 1 , wherein said mixing prevention plate is shaped into a bottomed cylindrical shape having a ring-like upper plate and a cylindrical side plate.  
   
   
       3 . A heat storage tank according to  claim 1 , wherein said center pipe, said body valve and said mixing prevention plate are shaped into separate members.  
   
   
       4 . A heat storage tank according to  claim 2 , wherein said body valve and said mixing prevention plate are shaped integrally with each other.  
   
   
       5 . A heat storage tank according to  claim 1 , wherein said center pipe and said mixing prevention plate are shaped integrally with each other.  
   
   
       6 . A heat storage tank according to  claim 2 , wherein said body valve and said side plate of said mixing prevention plate are integral with each other and said center pipe and said upper plate of said mixing prevention plate are integral with each other.