Reservoir tank

Abstract

A reservoir tank includes: a tank body in which cooling fluid is stored; an inflow pipe for sending the cooling fluid into the tank body; a discharge pipe for discharging the cooling fluid from the tank body; and a columnar member erected inside the tank body, in which the inflow pipe is connected to the tank body vertically below a liquid level of the cooling fluid stored inside the tank body, the columnar member extends in a substantially vertical direction when viewed along a center line of the inflow pipe, and a part of the columnar member is disposed on an extension line of the center line of the inflow pipe.

What is claimed is: 
     
         1 . A reservoir tank comprising:
 a tank body in which cooling fluid is stored;   an inflow pipe for sending the cooling fluid into the tank body;   a discharge pipe for discharging the cooling fluid from the tank body; and   a columnar member erected inside the tank body, wherein   the inflow pipe is connected to the tank body vertically below a liquid level of the cooling fluid stored inside the tank body,   the columnar member extends in a substantially vertical direction when viewed along a center line of the inflow pipe, and   a part of the columnar member is disposed on an extension line of the center line of the inflow pipe.   
     
     
         2 . The reservoir tank according to  claim 1 , comprising
 a plurality of the columnar members including a first columnar member and a second columnar member, wherein   the plurality of columnar members is arranged so that a flow of the cooling fluid flowing from the inflow pipe into the tank body is divided in a substantially horizontal direction by the first columnar member, and the divided flow of the cooling fluid is further divided in the substantially horizontal direction by the second columnar member.   
     
     
         3 . The reservoir tank according to  claim 1 , wherein a position in which the extension line of the center line of the inflow pipe and the columnar member intersect is vertically below the liquid level of the cooling fluid. 
     
     
         4 . The reservoir tank according to  claim 3 , wherein
 the center line of the inflow pipe extends in a substantially horizontal direction, and   the columnar member extends in a substantially vertical direction.   
     
     
         5 . The reservoir tank according to  claim 1 , wherein the columnar member is disposed to connect a top wall and a bottom wall of the tank body. 
     
     
         6 . The reservoir tank according to  claim 1 , wherein a cross-sectional shape of the columnar member in a horizontal plane is convex toward an upstream side of a flow of the cooling fluid. 
     
     
         7 . The reservoir tank according to  claim 1 , wherein a width of the columnar member when viewed along the center line of the inflow pipe is 0.5 times or more and 3 times or less a diameter of the inflow pipe. 
     
     
         8 . A reservoir tank comprising:
 a tank body in which cooling fluid is stored;   an inflow pipe for sending the cooling fluid into the tank body;   a discharge pipe for discharging the cooling fluid from the tank body; and   a columnar member erected inside the tank body, wherein   the inflow pipe extends inside the tank body and is opened to an inner space of the tank body vertically below a liquid level of the cooling fluid stored inside the tank body,   the columnar member extends in a substantially vertical direction when viewed along a center line of a pipe line of the inflow pipe at a portion where the inflow pipe is opened, and   a part of the columnar member is disposed on an extension line of the center line of the pipe line of the inflow pipe at the portion where the inflow pipe is opened.