Gas inlet pipe for exhaust gas cooler

Patent metadata

Field	Value
Publication number	US-10815848-B2
Application number	US-201916368416-A
Country	US
Kind code	B2
Filing date	Mar 28, 2019
Priority date	Mar 28, 2019
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A heat exchanger assembly, in particular an exhaust gas cooler, having a gas inlet pipe attached to an inlet diffuser to improve flow distribution of the gas in a case with a heat exchanger core within. The gas inlet pipe configured to disrupt the momentum of flow of the gas due to at least one bend upstream of the inlet diffuser. The gas inlet pipe including at least two intermediate bends which define multiple section of the gas inlet pipe, at least two of the sections redirecting flow of the gas before an outlet of the gas inlet pipe to more evenly distribute the gas at the outlet of the gas inlet pipe upstream of the inlet diffuser.

First claim

What is claimed is:

1. An inlet pipe for a heat exchanger comprising:
a first end and a second end, wherein a fluid flow direction within the inlet pipe is defined as being from the first end to the second end;
a first bend located between the first end and the second end;
a second bend located between the first bend and the second end;
a third bend located between the second bend and the second end;
a first tubular section having a first circular inside surface defined by a first inside diameter, wherein the first tubular section extends parallel to a first axis;
a second tubular section having a second circular inside surface defined by a second inside diameter, wherein the second tubular section extends parallel to a second axis;
a third tubular section having a third inside surface defined by a major inside dimension that is greater than the second inside diameter and a minor inside dimension that is less than the second inside diameter, wherein the third tubular section extends parallel to the second axis between the first tubular section and the second tubular section; and
a fourth tubular section having a fourth inside surface that connects the third inside surface to the second circular inside surface, wherein at least a portion of the fourth inside surface extends parallel to a third axis;
wherein the first tubular section and the second tubular section are between the first end and the second end,
wherein the third axis is oriented at an oblique angle to the second axis,
wherein the first bend is located between the first tubular section and the third tubular section,
wherein the second bend is located between the third tubular section and the fourth tubular section, and
wherein the third bend is located between the fourth tubular section and the second tubular section.

2. The inlet pipe of claim 1 , wherein the first inside diameter and the second inside diameter are the same.

3. The inlet pipe of claim 1 , wherein the first bend is a ninety degree angle.

4. The inlet pipe of claim 1 , wherein the third axis is at an obtuse angle to the second axis.

5. The inlet pipe of claim 1 , wherein the second bend is at an obtuse angle to the second axis.

6. The inlet pipe of claim 1 , wherein the first axis is perpendicular to the second axis.

7. The inlet pipe of claim 1 , wherein an intersection between the third inside surface and the fourth inside surface defines a first straight edge, and wherein the first straight edge is located within a first height of the inlet pipe, the first height defined by the second diameter measured parallel to the first axis along a height of the inlet pipe parallel to the first axis.

8. The inlet pipe of claim 7 , wherein the first straight edge is located within a first plane perpendicular to the first axis.

9. The inlet pipe of claim 7 , wherein the first straight edge is located within a second plane non-perpendicular to the first axis.

10. The inlet pipe of claim 1 , wherein the third inside surface includes a first planar surface.

11. The inlet pipe of claim 10 , wherein the first planar surface is located within a first plane perpendicular to the first axis.

12. The inlet pipe of claim 10 , wherein the first planar surface is located within a second plane non-perpendicular to the first axis.

13. The inlet pipe of claim 10 , wherein the fourth inside surface includes a second planar surface, and wherein the first planar surface is directly attached to the second planar surface.

14. The inlet pipe of claim 1 , wherein the fourth inside surface includes a lower surface and an upper surface opposite of the lower surface, wherein a first angle is defined between the lower surface and the second axis, wherein a second angle is defined between the upper surface and the second axis, and wherein the first angle and the second angle are different.

15. The inlet pipe of claim 14 , wherein the first angle is between 20 degrees and 50 degrees and wherein the second angle is between 40 degrees to 70 degrees.

16. An exhaust gas heat exchanger comprising:
a case having an inlet opening, an outlet opening; a coolant inlet port, and a coolant outlet port;
a core including two header plates on opposite sides of the core and a plurality of gas conduits that extend between and are fluidly sealed to the header plates, wherein the core is located within the case, wherein one of the header plates is located at and fluidly sealed to the inlet opening and the other of the header plates is located at and fluidly sealed to the outlet opening, and wherein coolant flow areas are defined within the case on the outside of the gas conduits;
a inlet diffuser including an gas inlet port and a diffuser outlet structurally connected to the inlet opening and fluidly connected to the plurality of gas conduits;
a gas pipe including, a first end and a second end;
a first bend located between the first end and the second end;
a second bend located between the first bend and the second end;
a third bend located between the second bend and the second end;
a first tubular section extending parallel to a first axis and having a first circular inside surface extending parallel to the first axis and defined by a first inside diameter;
a second tubular section extending parallel to a second axis and having a second circular inside surface extending parallel to the second axis and defined by a second inside diameter;
a third tubular section extending parallel to the second axis between the first tubular section and the second tubular section and having a third inside surface defined by a major inside dimension that is greater than the second inside diameter and a minor dimension that is less than the second inside diameter; and
a fourth tubular section extending parallel to a third axis between the second tubular section and the third tubular section and including a fourth inside surface that extends from the third inside surface to the second circular inside surface,
wherein the first tubular section and the second tubular section are between the first end and the second end,
wherein the third axis is oriented at an oblique angle to the second axis, and
wherein the second end of the gas inlet pipe is directly attached to the gas inlet port of the inlet diffuser.

Assignees

• Modine Mfg Co

Inventors

• Nino Victor G
• Beyhaghi Saman
• Crawford Mitchell S
• Setty Viswanath
• Kuecker Zachary W

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F28F2275/20

  with threaded elements · CPC title

• F28F9/0246

  Arrangements for connecting header boxes with flow lines · CPC title

• F28F9/0224

  Header boxes formed by sealing end plates into covers (F28F9/0221 takes precedence) · CPC title

• F28D21/0003

  the heat being recuperated from exhaust gases (F28D21/0014 takes precedence) · CPC title