Heat exchanger for cooling a fluid of an internal combustion engine, assembly with at least one heat exchanger and method for manufacturing a heat exchanger

Patent metadata

Field	Value
Publication number	US-9631875-B2
Application number	US-201313932358-A
Country	US
Kind code	B2
Filing date	Jul 1, 2013
Priority date	Jun 29, 2012
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A heat exchanger ( 10 ) cooling a fluid and a method for manufacturing, the heat exchanger ( 10 ) having an outer pipe section ( 12 ) in which a plurality of inner pipe sections ( 36 ) with channels for the fluid to be cooled are disposed. At least one cooling fluid channel ( 56 ) is disposed in the outer pipe section ( 12 ). The at least one cooling fluid channel ( 56 ) and the at least one channel for the fluid to be cooled are in heat contact and fluidically separated from each other. A plurality of inner pipe sections ( 36 ) open on both ends ( 38, 46 ) form of a pipe bundle ( 34 ) having ends fixed tightly in a corresponding lead-through opening ( 40 ) of an upstream end body ( 42 ) and fixed tightly with the other end ( 46 ) in a corresponding lead-through opening ( 48 ) of a downstream end body ( 50 ).

First claim

The invention claimed is:

1. A heat exchanger cooling a charging fluid of a charged internal combustion engine, comprising:
an outer pipe section including
an inlet end; and
an outlet end;

a plurality of inner pipe sections arranged within said outer pipe section and extending between said inlet end and said outlet end and open at both opposing ends, said plurality of inner pipe sections defining a plurality of channels for the fluid to be cooled therein;
at least one cooling fluid channel conducting a cooling fluid and arranged within said outer pipe section;
wherein the at least one cooling fluid channel is in heat transfer contact with said one channel for the fluid to be cooled;
wherein said at least one cooling fluid channel is separated fluid-tightly from said one channel for the fluid to be cooled;
wherein said plurality of inner pipe sections, which are open each at both ends, are arranged together as a pipe bundle;
wherein said plurality of inner pipe sections engage with and are sealably connected at a first end to a respective lead-through opening of an upstream end body;
wherein said plurality of inner pipe sections engage with and are sealably connected at an opposing second end to a respective lead-through opening of a downstream end body;
wherein said upstream end body separates fluid-tightly an inlet chamber of the outer pipe section from a coolant chamber arranged within said inner pipe sections;
wherein said downstream end body separates fluid-tightly an outlet chamber of the outer pipe section from the coolant chamber arranged within said inner pipe sections; and
wherein said inner pipe sections fluidically interconnects said inlet chamber to said outlet chamber;
wherein adjacent inner pipe sections of said plurality of inner pipe sections are spaced apart from each other in the area of the end bodies and abut together in a longitudinal central section of said outer pipe section, the central section arranged between the end bodies;
wherein the outer pipe section is tapered radially inwardly in the central section relative to the end bodies such that the central section has a smaller inner diameter than the end bodies.

2. The heat exchanger according to claim 1 , wherein
said plurality of inner pipe sections are spaced apart at a greater distance and in an area of said upstream end body and the downstream end body relative to spacing within the longitudinal central section of said outer pipe section;
wherein said greater spacing at said area of outer pipe section includes in the area of the upstream end body and the downstream end body a fluid passage distributing cooling fluid to said cooling fluid channels.

3. The heat exchanger according to claim 1 , wherein
the outer pipe section is tapered radially inwardly from the end bodies to the central section; and
wherein inner pipe sections of said plurality of inner pipe sections disposed at a radially outer circumference of said pipe bundle abut against a radially inner circumferential side of said longitudinal central section of the outer pipe section.

4. The heat exchanger according to claim 1 , wherein
said the inner pipe sections of said plurality of inner pipe sections which are not disposed at the radially outer circumference of the pipe bundle are tightly packed and abutting against each other, each of said inner pipe sections of said plurality of inner pipe sections which are not disposed at the radially outer circumference of the pipe bundle surrounded each by six abutting inner pipe sections within said central section.

5. The heat exchanger according to claim 1 , wherein
a radially outer circumferential side of said pipe bundle and a radially inner circumferential side of said outer pipe section each have a radially hexagonal profile in a radial direction relative to a longitudinal axial direction of said outer pipe section such that said pipe bundle is received within and abuts against said radially inner circumferential side of said outer pipe section.

6. The heat exchanger according to claim 1 , wherein
a radially inner circumferential side of the outer pipe section has a radial cross sectional profile that is at least partially complementary to a radial cross sectional profile of the radially outer circumferential side of said pipe bundle in accordance with said plurality of pipe sections therein.

7. An assembly with at least one heat exchanger according to claim 1 , comprising:
an outer pipe section in which is disposed said plurality of inner pipe sections with at least one channel for the fluid to be cooled; and
in which is disposed at least one cooling channel for a cooling fluid;
the at least one cooling channel and the at least one channel for the fluid to be cooled being sealed fluidically against each other and in heat transfer contact;
wherein at least two heat exchangers are disposed in parallel or in series relative to a flow direction of the fluid to be cooled.

8. A method of manufacturing a heat exchanger for cooling a fluid of an internal combustion engine of claim 1 , comprising:
providing a plurality of inner pipe sections is made of synthetic material;
forming said plurality of inner pipe sections in the form of a pipe bundle wherein longitudinally central portions of said inner pipe sections are tightly packed an abut against each other and longitudinally outer sections of said plurality of inner pipe sections are have a large radial spacing so as not to abut against adjacent inner pipe sections;
providing two end bodies having a plurality of continuous openings extending there through;
inserting a first end of pipe sections of said plurality of inner pipe sections through corresponding continuous openings of a first one of said end bodies;
inserting a second end of pipe sections of said plurality of inner pipe sections through corresponding continuous openings of a second one of said end bodies;
wherein said pipe bundle in an area of a central section is tapered radially inwardly between the first and second end bodies;
seal tightly securing said first and second ends of said plurality of inner pipe sections into the continuous openings of respective ones of said first and second end bodies; and
inserting said pipe bundle into an outer pipe section, so that the end bodies tightly abut against a radially inner circumferential side of said outer pipe section.

9. The method of manufacturing a heat exchanger according to claim 8 , wherein
said end of said plurality of inner pipe sections are firmly bonded and secured to the first end second end bodies, said bonding by welding and/or fixed by means of a tightly hardening material.

Assignees

• Mann & Hummel Gmbh

Inventors

• Korn Alexander
• Buehl Heinz
• Rehmann Achim
• Pietrowski Herbert
• Speidel Gerrit-Tobias

Classifications

• F28D7/163

  with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing (F28D7/1615 takes precedence) · CPC title

• F28F21/062 Primary

  the heat-exchange apparatus employing tubular conduits · CPC title

• F28F1/006

  with variable shape, e.g. with modified tube ends, with different geometrical features (F28F1/025, F28F1/06, F28F1/08, F28F9/16, F28F9/18 take precedence) · CPC title

• B23P15/26

  heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)} · CPC title

• F28D7/0041

  the conduits for only one medium being tubes having parts touching each other or tubes assembled in panel form (F28D7/0008, F28D7/0058 take precedence) · CPC title