Collector box for heat exchanger of motor vehicle, has intermediate plate with openings having dimensions larger than that of drillings or holes, and spacing unit providing space between ends of tubes and edges of openings

摘要

#CMT# #/CMT# The case has a collector plate (2) with a set of drillings or holes, each permitting an insertion of an end of a tube (1). An intermediate plate (3) includes openings with dimensions larger than that of the drillings or holes. The plates and a cover (4) are partially brazed together. A spacing unit provides a space between the ends of the tubes and edges of the openings of the intermediate plate. An engagement portion (14) has a part that is fixed by brazing at a side of the intermediate plate. #CMT#USE : #/CMT# Collector box for a heat exchanger (claimed) that is traversed by a high pressure fluid such as cooling fluid e.g. carbon dioxide, and installed in an engine block of a motor vehicle for forming a gas cooler to be used as a condenser in an air-conditioning circuit of the vehicle. #CMT#ADVANTAGE : #/CMT# The collector plate has reduced thickness, and ensures the drilling by stamping for creating the housing for receiving the ends of the tubes, while ensuring an excellent resistance to the pressure, thus reducing the risk of bursting at the level of a cooperation zone between the ends of the tubes and the box. The collector plate can be formed in a simple and economic manner. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic longitudinal sectional view illustrating an end of tubes inserted in a collector plate, an intermediate plate and a cover. 1 : Tube 2 : Collector plate 3 : Intermediate plate 4 : Cover 14 : Engagement portion.