Heat exchanger

Patent metadata

Field	Value
Publication number	US-11578924-B2
Application number	US-202016930363-A
Country	US
Kind code	B2
Filing date	Jul 16, 2020
Priority date	Jul 16, 2020
Publication date	Feb 14, 2023
Grant date	Feb 14, 2023

Abstract

A heat exchanger ( 1 ) for thermally coupling a first fluid to a second fluid so as to transfer heat and in a fluidically separate manner includes a securing assembly ( 8 ) of two cover parts ( 9 ) and at least one, preferably a plurality of guide parts ( 11 ), through which duct tubes ( 5 ) of the heat exchanger ( 1 ) pass. The duct tubes ( 5 ) extend inside a housing tube ( 2 ) along the longitudinal axis of the housing tube ( 2 ). The first fluid passes through the housing tube ( 2 ) outside of the duct tubes ( 5 ), and the second fluid passes through the duct tubes ( 5 ). The duct tubes ( 5 ) may have circular or flattened cross-sections.

First claim

What is claimed is:

1. A heat exchanger for thermally coupling a first fluid to a second fluid so as to transfer heat and in a fluidically separate manner, the heat exchanger comprising:
a housing tube ( 2 ) having a longitudinal central axis ( 3 ), through which a first flow path ( 4 ) for the first fluid extends,
a plurality of duct tubes ( 5 ), which each have a longitudinal axis ( 6 ) and defining a second flow path ( 7 ) for the second fluid, the plurality of duct tubes extending through the first flow path ( 4 ) for the first fluid, to allow the first fluid to flow around the duct tubes outside of the duct tubes and to allow the second fluid to flow through the duct tubes ( 5 ) inside the duct tubes, and
flow guide plates ( 17 ) for guiding the first fluid between the duct tubes ( 5 ) in the first flow path ( 4 ),
wherein the duct tubes ( 5 ) are arranged completely inside the housing tube ( 2 ) and are each secured to the housing tube ( 2 ) by a securing assembly ( 8 ) arranged between the housing tube ( 2 ) and the duct tubes ( 5 ),
wherein the securing assembly ( 8 ) has two cover parts ( 9 ) near opposite ends of the housing tube, respectively, through which duct tubes ( 5 ) pass, wherein each of the duct tubes ( 5 ) has open ends longitudinally outward from the cover parts ( 9 ), respectively, thereby forming duct openings ( 10 ), and
wherein the securing assembly ( 8 ) has at least one guide part ( 11 ), which is arranged longitudinally between the two cover parts ( 9 ) at a distance from the cover parts, and completely penetrated by the duct tubes ( 5 ), for guiding the first fluid;
wherein the heat exchanger ( 1 ) has at least one cross-section ( 12 ) transverse to the longitudinal central axis ( 3 ) of the housing tube and in which the longitudinal central axis ( 3 ) of the housing tube defines a housing center ( 13 ),
wherein at least two imaginary cross-sectional circles ( 14 , 14 ′) are arranged between the housing center ( 13 ) and the housing tube ( 2 ), wherein duct tube pairs ( 31 ) of two duct tubes ( 5 ) located radially opposite one another are arranged between an inner imaginary cross-sectional circle and an outer imaginary cross-sectional circle of the at least two imaginary cross-sectional circles ( 14 , 14 ′) so as to be distributed around the housing center ( 13 ) in a circumferential direction ( 24 ),
wherein first duct tubes ( 20 ) are circumferentially distributed on the inner cross-sectional circle ( 14 ) around the housing center ( 13 ) and second duct tubes ( 21 ) are circumferentially distributed on the outer cross-sectional circle ( 14 ′) around the housing center ( 13 ),
wherein the flow guide plates ( 17 ) for guiding the first fluid are arranged between the first duct tubes ( 20 ) and the second duct tubes ( 21 ), wherein at least one flow guide plate ( 17 ) is soldered to at least one of the first duct tubes ( 20 ) and to at least one of the second duct tubes ( 21 );
wherein exactly one of the second duct tubes ( 21 ) is respectively assigned to each first duct tube ( 20 ), such that the flow guide plates are arranged in the shape of a zig-zag.

2. The heat exchanger according to claim 1 ,
wherein the heat exchanger ( 1 ) has at least one cross-section ( 12 ) centered around the longitudinal central axis ( 3 ) of the housing tube and in which the longitudinal central axis ( 3 ) of the housing tube defines a housing center ( 13 ),
wherein at least two imaginary cross-sectional circles ( 14 , 14 ′) are arranged between the housing center ( 13 ) and the housing tube ( 2 ), wherein at least two duct tube pairs ( 31 ) of two duct tubes ( 5 ) located radially opposite one another are arranged between the two cross-sectional circles ( 14 , 14 ′) so as to be distributed around the housing center ( 13 ) in a circumferential direction ( 24 ).

3. The heat exchanger according to claim 2 ,
wherein one of the at least two imaginary cross-sectional circles is an outer cross-sectional circle and another one of the at least two imaginary cross-sectional circles is an inner cross-sectional circle,
wherein a duct tube-free annular area ( 32 ) is defined between the outer cross-sectional circle ( 14 ′) and the housing tube ( 2 ), and
wherein a duct tube-free circular area ( 33 ) is defined between the inner cross-sectional circle ( 14 ) and the housing center ( 13 ).

4. The heat exchanger according to claim 2 ,
wherein at least one of the at least two cross-sectional circles ( 14 , 14 ′) is arranged centrically with respect to the housing center ( 13 ), wherein the cross-sectional circles ( 14 , 14 ′) have cross-sectional circle diameters, which differ from one another.

5. The heat exchanger according to claim 1 ,
wherein an inner cross-section of the first duct tubes ( 20 ) is smaller than an inner cross-section of the second duct tubes ( 21 ).

6. The heat exchanger according to claim 1 ,
wherein the duct tubes ( 5 ) are soldered to the cover parts ( 9 ) and to the at least one guide part ( 11 ).

7. The heat exchanger according to claim 1 ,
wherein the housing tube ( 2 ), the duct tubes ( 5 ), the two cover parts ( 9 ), and the at least one guide part ( 11 ) are all made of an aluminum material.

8. The heat exchanger according to claim 1 ,
wherein the housing tube ( 2 ), the duct tubes ( 5 ), the two cover parts ( 9 ), and the guide parts ( 11 ) are all made of an aluminum material and are soldered to one another in a firmly bonded manner as part of a soldering process performed under controlled atmospheric conditions.

9. The heat exchanger according to claim 1 , wherein each of the duct tubes ( 5 ) is configured as a flat tube ( 34 ) and has a rectangular cross-sectional area, which is constant along the longitudinal axis ( 6 ) of the duct tube and which comprises rounded cross-sectional areas of duct tube corners, wherein each flat tube ( 34 ) has two long sides ( 22 ) located opposite one another with respect to the longitudinal axis ( 6 ) of the duct tube, and two short sides ( 23 ) located opposite one another, which connect the long sides ( 22 ) to one another.

10. The heat exchanger according to claim 9 ,
wherein, the flat tubes ( 34 ) are arranged between the cross-sectional circles ( 14 , 14 ′) in such a way that each of the short sides ( 23 ) of each of the flat tubes ( 34 ) faces the short side ( 23 ) of a circumferentially adjacent flat tube ( 34 ).

11. The heat exchanger according to claim 9 ,
wherein the flat tubes ( 34 ) are arranged between the respective cross-sectional circles ( 14 , 14 ′) in such a way that the long sides ( 22 ) of the flat tubes extend tangentially with respect to the housing center ( 13 ).

Assignees

• Mahle Int Gmbh

Inventors

• Krupa Andrzej
• Kent Scott Edward
• Stelmasinska Anna
• Walczak Szymon

Classifications

• F28F9/22

  Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates · CPC title

• F28F9/0131

  formed by plates (F28F9/0138 takes precedence) · CPC title

• F28F1/126

  consisting of zig-zag shaped fins (F28F1/105 takes precedence) · CPC title

• F28F9/027

  in the form of distribution pipes · CPC title

• F28D7/1684 Primary

  the conduits having a non-circular cross-section · CPC title