Liquid supply system

Abstract

A liquid supply system that can be cooled efficiently. The liquid supply system 10 includes a container 130 having an inlet 131 b and an outlet 131 c for liquid and provided with a pump chamber P 1 , P 2 inside it, an outlet pipe 320 through which liquid discharged from the outlet 131 c is brought to outside, a fluid channel through which liquid flows, the fluid channel leading out of the inlet 131 b , passing through the pump chamber P 1 , P 2 , and extending vertically downward from the pump chamber P 1 , P 2 to the outlet 131 c , and a gas vent pipe 602 connecting a first orifice 601 and a second orifice 604 , the first orifice 601 being disposed in the fluid channel and the second orifice 604 being disposed in the fluid channel downstream of the first orifice 601 . The second orifice 604 is located at vertically higher level than the first orifice 601.

1 . A liquid supply system comprising:
 a container having an inlet and an outlet for liquid and provided with a pump chamber inside it;   an outlet pipe through which liquid discharged from the outlet is brought to outside;   a fluid channel through which liquid flows, the fluid channel leading out of the inlet, passing through the pump chamber, and extending vertically downward from the pump chamber to the outlet; and   a gas vent pipe having a first orifice disposed in the fluid channel and a second orifice disposed in the fluid channel downstream of the first orifice,   wherein the second orifice is located at vertically higher level than the first orifice.   
     
     
         2 . The liquid supply system according to  claim 1 , wherein the second orifice is disposed in the outlet pipe. 
     
     
         3 . The liquid supply system according to  claim 1 , comprising:
 a shaft member that moves vertically upward and downward in the container; and   a first bellows and a second bellows disposed one above the other along the vertical direction, each of which expands and contracts with upward and downward motion of the shaft member;   wherein the pump chamber includes a first pump chamber formed by a space surrounding the outer circumference of the first bellows and a second pump chamber formed by a space surrounding the outer circumference of the second bellows,   the fluid channel includes a first fluid channel through which liquid flows from the inlet to the outlet via the first pump chamber and a second fluid channel through which liquid flows from the inlet to the outlet via the second pump chamber, and   the gas vent pipe is provided in at least one of the first and second fluid channels.   
     
     
         4 . The liquid supply system according to  claim 3 , wherein the first pump chamber is disposed above the second pump chamber and the first orifice is located above the outlet of the first pump chamber.