Refrigerating Unit Comprising An Ultrasound-Welded Suction Tube And A Throttling Tube

Abstract

A refrigerating unit comprising a suction tube and a throttling tube for refrigerant, whereby the throttling tube, at a fist location on the suction tube, is inserted inside the suction tube and is joined thereto. In addition, the throttling tube and the suction tube are joined to one another at a second location on the suction tube at which outer surfaces of the throttling tube and of the suction tube touch. According to the invention, the outer surfaces of the throttling tube and of the suction tube are joined to one another at the second location by ultrasound welding. The invention also relates to a method for joining the throttling tube and the suction tube.

1 - 6 . (canceled) 
   
   
       7 . A refrigerating unit comprising a suction tube and a throttling tube which runs at least over a part of its length inside the suction tube and is guided out from the suction tube to form a first outlet location, wherein the throttling tube and the suction tube are joined to one another at a second location of the suction tube at which outer surfaces of the throttling tube and the suction tube are in contact, wherein the outer surfaces of the throttling tube and the suction tube are joined to one another at the second location by ultrasound welding. 
   
   
       8 . The refrigerating unit according to  claim 7 , wherein the second location is about 5 mm to 20 mm, preferably about 10 mm from the first location. 
   
   
       9 . The refrigerating unit according to  claim 7 , wherein the second location is located downstream from the outlet location with reference to the refrigerant flowing in the suction tube. 
   
   
       10 . The refrigerating unit according to  claim 7 , wherein the outlet location is provided at a connecting tube on which both the suction tube and the throttling tube are fixed downstream in a liquid- and gastight manner. 
   
   
       11 . The refrigerating unit according to  claim 7 , wherein the suction tube has an expansion or a cut for the throttling tube in the area of the outlet location. 
   
   
       12 . A method for joining a suction tube of a refrigerating unit to a throttling tube comprising the following acts:
 guiding the throttling tube out from the inside of the suction at an outlet location of the suction tube;   joining the suction tube and the throttling tube at the outlet location by soldering;   bringing in contact an outer surface of a portion of the throttling tube located outside the suction tube with an outer surface of the suction tube at a second location of the suction tube;   joining the suction tube and the throttling tube at the second location;   joining the outer surfaces of the suction tube and the throttling tube to one another at the second location by ultrasound welding.