Heat exchanger having a condensate extractor

Patent metadata

Field	Value
Publication number	US-9909818-B2
Application number	US-201313897851-A
Country	US
Kind code	B2
Filing date	May 20, 2013
Priority date	May 18, 2012
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

The disclosure presents a heat exchanger assembly having a first manifold, a second manifold spaced from the first manifold, a plurality of refrigerant tubes extending between and in hydraulic communication with the first and second manifolds, a plurality of corrugated fins inserted between the plurality of refrigerant tubes, and a condensate extractor having a comb baffle portion with fingers inserted between the plurality of refrigerant tubes and a conveyance portion. The comb baffle portion is configured to extract condensate from between the plurality of refrigerant tubes and the conveyance portion is configured to convey condensate away from the heat exchanger assembly.

First claim

Having described the invention, it is claimed:

1. A heat exchanger assembly comprising:
a first manifold;
a second manifold spaced from the first manifold;
a plurality of refrigerant tubes, each refrigerant tube of the plurality of refrigerant tubes extending along a tube length from the first manifold to the second manifold and is in hydraulic communication with the first and second manifolds;
a plurality of corrugated fins inserted between the plurality of refrigerant tubes, thereby defining a core having a plurality of flow channels for airflow from an upstream face of the core to a downstream face of the core, the plurality of corrugated fins having one group of fins forming upper fins defining an upper core portion extending from the first manifold along an upper portion of the tube length and spaced from the second manifold, and another group of fins forming lower fins defining a lower core portion extending from the second manifold along a lower portion of the tube length and spaced from upper core portion and from the first manifold; and
a condensate extractor having a comb baffle portion,
wherein the comb baffle portion includes a plurality of fingers extending into the plurality of flow channels between the upper core portion and the lower core portion between the upper portion of the tube length and the lower portion of the tube length and configured to extract condensate from between the plurality of refrigerant tubes, wherein the comb baffle portion transitions into a condensate conveyance portion and wherein at least one of the fingers includes a distal end having an upturned segment engaging either of the downstream face and the upstream face of the core, and
wherein the upturned segment of the fingers cooperate with the condensate conveyance portion to clip the condensate extractor onto the heat exchanger assembly.

2. The heat exchanger assembly of claim 1 , wherein the condensate extracted by the fingers gravity flows from the comb baffle portion to the conveyance portion due to gravity.

3. The heat exchanger assembly of claim 2 , wherein the condensate conveyance portion is positioned immediately adjacent to one of the downstream face and the upstream face of the core.

4. The heat exchanger assembly of claim 2 ,
wherein the condensate conveyance portion includes a trough sloped at an angle sufficient for the condensate to flow to an end of the trough.

5. The heat exchanger assembly of claim 2 , wherein the condensate conveyance portion includes:
an edge having a hem opposite that of the fingers of the comb baffle portion;
a condensate conduit having a longitudinal slit to accept the insertion of the hem edge into the condensate conduit; and
a plurality of apertures along the longitudinal slit configured to accept gravity flow of condensate into the condensate conduit.

6. The heat exchanger assembly of claim 2 , wherein the condensate conveyance portion includes:
an edge having a hem opposite that of the fingers of the comb baffle portion;
at least one depression on the hem defining a hole; and
a strand of material extending from the hole in the direction of gravity toward the lower core portion.

7. The heat exchanger assembly of claim 2 ,
wherein the refrigerant tubes include flat exterior surfaces;

wherein the plurality of fins includes trailing edges and the plurality of refrigerant tubes includes rear noses,
wherein the rear noses extend beyond the trailing edges, thereby defining gap surfaces on the flat exterior surfaces of the plurality of refrigerant tubes between the trailing edges of the fins and the rear noses of the refrigerant tubes.

8. The heat exchanger assembly of claim 7 ,
wherein the condensate conveyance portion is positioned immediately adjacent to the downstream face adjacent to the gap surfaces such that the fingers of the comb baffle portion intercept and redirect condensate flowing along the gap surfaces.

9. The heat exchanger assembly of claim 2 ,
wherein the plurality of fins includes leading edges and the plurality of refrigerant tubes includes front noses,

wherein the leading edges extend beyond the front nose, thereby defining an overhang of fins beyond the front nose.

10. The heat exchanger assembly of claim 9 ,
wherein each of the plurality of fingers includes a distal end having an upturned segment engaged to one of the leading edges of the plurality of fins.

11. The heat exchanger assembly of claim 1 ,
wherein the refrigerant tubes includes flat exterior surfaces; and
wherein the plurality of fingers are configured to seal against the flat exterior surfaces of the plurality of the refrigerant tubes, such that the plurality of fingers intercept and redirect condensate away from the core.

12. A heat exchanger assembly comprising:
a first manifold;
a second manifold spaced from the first manifold;
a plurality of refrigerant tubes extending along a tube length between and in hydraulic communication with the first and second manifolds;
a plurality of corrugated fins inserted between the plurality of refrigerant tubes, thereby defining a core having a plurality of flow channels for airflow from a upstream face of the core to a downstream face of the core; and
a condensate extractor having a comb baffle portion,
wherein the comb baffle portion is spaced apart along the tube length from both the first manifold and the second manifold and includes fingers extending into the flow channels and configured to extract condensate from between the plurality of refrigerant tubes, wherein the plurality of fingers includes a plurality of distal ends having a distal end having an upturned segment engaged to leading edges of the plurality of fins,
wherein the comb baffle portion transitions into a condensate conveyance portion, such that the condensate extracted by the fingers gravity flows from the comb baffle portion to the conveyance portion,
wherein the refrigerant tubes include flat exterior surfaces;
wherein the plurality of fins includes trailing edges and the plurality of refrigerant tubes includes rear noses, and
wherein the rear noses extend beyond the trailing edges, thereby defining gap surfaces on the flat exterior surfaces of the plurality of refrigerant tubes between the trailing edges of the fins and the rear noses of the refrigerant tubes.

13. The heat exchanger assembly of claim 12 ,
wherein the condensate conveyance portion is positioned immediately adjacent to the downstream face adjacent to the gap surfaces such that the fingers of the comb baffle portion intercept and redirect condensate flowing along the gap surfaces.

14. The heat exchanger assembly of claim 13 ,
wherein the plurality of refrigerant tubes includes front noses,

wherein the leading edges extend beyond the front nose, thereby defining an overhang of fins beyond the front nose.

Assignees

• Mahle Int Gmbh

Inventors

• Goodman Henry C
• Wintersteen Douglas C
• Xia Yanping
• Czach Joseph B
• Hambruch Joel T
• Forrest Wayne O
• Joshi Shrikant M
• Samuelson David E
• Pautler Donald R
• Johnson Russell S

Classifications

• F28D1/05366 Primary

  Assemblies of conduits connected to common headers, e.g. core type radiators · CPC title

• F25D2321/146

  characterised by the pipes or pipe connections · CPC title

• F28F1/128

  Fins with openings, e.g. louvered fins · CPC title

• F28F1/12 Primary

  the means being only outside the tubular element · CPC title

• F25D21/14

  Collecting or removing condensed and defrost water; Drip trays · CPC title