Suction Jet Pump

Abstract

The invention relates to a suction jet pump ( 8 ), consisting of a driving jet nozzle ( 10 ), a mixing tube ( 11 ), an intake opening ( 12 ), a working-fluid line ( 7 ) connected to the driving jet nozzle ( 10 ), and a valve ( 9 ) which is arranged with the working-fluid line ( 7 ) and whose housing ( 13 ) has an inlet ( 14 ) and an outlet ( 15 ). A throughflow opening ( 17 ) with a valve body ( 18 ) on both sides of the throughflow opening ( 17 ) is arranged in the housing ( 13 ) in such a way that the throughflow opening ( 17 ) can be closed on both the inlet side and the outlet side, and that at least one spring ( 25, 27, 28 ) is arranged inside the housing ( 13 ) in such a way that it holds the valve body ( 18 ) in a position closing the throughflow opening ( 17 ) on the outlet side until the system pressure is reached.

1 .- 10 . (canceled) 
   
   
       11 . A suction jet pump, the suction jet comprising:
 a driving jet nozzle;   a mixing tube arranged downstream of the driving jet nozzle;   an intake opening arranged between the mixing tube and the driving jet nozzle;   a working-fluid line coupled to the driving jet nozzle; and   a valve arranged in the working-fluid line, the valve comprising:
 a valve housing, having an inlet and an outlet, 
 a throughflow opening arranged in the housing between the inlet and the outlet; 
 a valve body arranged on both sides of the throughflow opening, the valve body adapted to close the throughflow opening on an inlet side and on an outlet side; and 
 at least one spring arranged within the housing and coupled to the valve body, 
 wherein the at least one spring is adapted to hold the valve body in a position closing the throughflow opening until the system pressure is reached. 
   
   
   
       12 . The suction jet pump according to  claim 11 , wherein the throughflow opening is a diaphragm. 
   
   
       13 . The suction jet pump according to  claim 11 , wherein the valve body comprises:
 a first sealing element; and   a second sealing element,   wherein the first sealing element and the second sealing element are adapted to cooperate with a respective inlet sealing seat and output sealing seat on the inlet side and the outlet side of the throughflow opening.   
   
   
       14 . The suction jet pump according to  claim 13 , wherein the first sealing element and the second sealing element are annular disks. 
   
   
       15 . The suction jet pump according to  claim 12 , wherein a first sealing element and a second sealing element are arranged on both sides of the diaphragm relative to the direction of flow such that the first sealing element and the second sealing element surround the throughflow opening 
   
   
       16 . The suction jet pump according to  claim 11 , further comprising a second spring arranged within the housing and coupled to the valve body, wherein the first spring is designed with respect to the opening pressure of the valve and the second spring allows a further movement of the valve body only above the system pressure. 
   
   
       17 . The suction jet pump according to  claim 11 , wherein the at least one spring is a pressure spring. 
   
   
       18 . The suction jet pump according to  claim 11 , wherein the at least one spring is a tension spring. 
   
   
       19 . The suction jet pump according to  claim 17 , wherein the at least one spring is arranged between the housing and the valve body. 
   
   
       20 . The suction jet pump according to  claim 17 , wherein the at least one spring is arranged between the valve body and the throughflow opening. 
   
   
       21 . The suction jet pump according to  claim 11 , further comprising a shoulder formed on the valve body for receiving the at least one spring. 
   
   
       22 . The suction jet pump according to  claim 11 , wherein the at least one spring is adapted to hold the valve body in a position closing the throughflow opening on the outlet side until the system pressure is reached. 
   
   
       23 . The suction jet pump according to  claim 18 , wherein the at least one spring is arranged between the housing and the valve body. 
   
   
       24 . The suction jet pump according to  claim 11 , wherein the at least one spring is adapted to hold the valve body in a position closing the throughflow opening on the inlet side until the system pressure is reached. 
   
   
       25 . A suction jet pump, the suction jet comprising:
 a driving jet nozzle;   a mixing tube arranged downstream of the driving jet nozzle;   an intake opening arranged between the mixing tube and the driving jet nozzle; and   a valve coupled to the driving jet nozzle in the working-fluid line, the valve comprising:
 a valve housing having an inlet and an outlet, 
 a throughflow opening arranged in the housing between the inlet and the outlet, the throughflow opening having an inlet sealing seat on an inlet side and an output sealing seat and an outlet side of the throughflow opening; 
 a valve body having a first sealing element arranged on the first side of the throughflow opening and a second sealing element arranged on the second side of the throughflow opening, the first sealing element and the second sealing element are adapted to cooperate with the respective inlet sealing seat and output sealing seat to close the throughflow opening on one of the inlet side and the outlet side of the throughflow opening; and 
 at least one spring arranged within the housing and coupled to the valve body, 
 wherein the at least one spring adapted to hold the valve body in a position closing the throughflow opening until the system pressure is reached. 
   
   
   
       26 . The suction jet pump according to  claim 25 , wherein the at least one spring adapted to hold the valve body in a position closing the throughflow opening on the outlet side until the system pressure is reached. 
   
   
       27 . The suction jet pump according to  claim 25 , wherein the at least one spring adapted to hold the valve body in a position closing the throughflow opening on the inlet side until the system pressure is reached.