Heat exchanger with a closing bar optimized for protection against icing

Patent metadata

Field	Value
Publication number	US-12516889-B2
Application number	US-202118268217-A
Country	US
Kind code	B2
Filing date	Dec 13, 2021
Priority date	Dec 18, 2020
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

Heat exchanger with plates, which is configured for a heat exchange between a hot fluid and a cold fluid, comprising at least one core band (130a, 130b) arranged in order to maintain the sealing tightness, a plurality of closing bars (138) defining, with the closing plates, flow channels, characterized in that the core band (130a) arranged at a cold pass inlet and at a hot pass inlet comprises an inlet (132) for supplying hot air, and in that at least one closing bar (138) arranged in the lengthwise direction of the inlet of the cold pass comprises an inlet for said hot air and a flow circuit for said hot air in a U shape and comprising two sections, each extending over the whole length of the closing bar, a hot air outlet for expelling the hot air in the hot pass, and an intermediate section forming the base of the U.

First claim

The invention claimed is:

1 . A heat exchanger with plates, which is configured for a cross flow heat exchange between a hot fluid flowing in a hot pass and a cold fluid flowing in a cold pass, the fluids flowing between closing plates, comprising:
at least one core band arranged to form edges of the exchanger and to ensure sealing-tightness between the hot pass and the cold pass, a plurality of closing bars disposed between each closing plate and defining, with the closing plates, flow channels for fluids passing through the exchanger, wherein the core band arranged at an inlet of the cold pass and an inlet of the hot pass comprises an inlet for supplying hot air, and a plurality of orifices disposed opposite at least one closing bar of the hot pass adjoining said core band, and wherein at least one closing bar arranged in the lengthwise direction of the inlet of the cold pass comprises an inlet for said hot air opposite one of the orifices of the core band, and a circuit for the flow of said hot air connected to said hot air inlet, said flow circuit being U-shaped and comprising: a first section and a second section each extending over the whole length of the closing bar, a hot air outlet arranged at one end of the second section and configured to expel the hot air in the hot pass at the inlet of the hot pass, and an intermediate section forming the base of the U and connecting the first section to the second section by their end respectively opposite to the hot air inlet and to the hot air outlet.

2 . The heat exchanger as claimed in claim 1 , wherein at least one closing bar comprising a flow circuit is manufactured by additive manufacture.

3 . The heat exchanger as claimed in claim 1 , wherein the core band is manufactured by additive manufacture.

4 . The heat exchanger as claimed in claim 1 , wherein at least one closing bar comprising a flow circuit and at least one portion of the core band are formed of a single-piece part.

5 . The heat exchanger as claimed in claim 1 , wherein the core band comprises a manifold comprising the hot air inlet, extending over the length of the core band and configured to supply hot air to the flow circuit via the orifices.

6 . The heat exchanger as claimed in claim 1 wherein the flow circuit comprises internal fins arranged to increase the surface area for heat exchange between the hot air and the walls of the flow circuit.

7 . A reheater-condenser exchanger system comprising at least a first exchanger, referred to as a reheater, and a second exchanger, referred to as a condenser, the reheater and the condenser being arranged in series so that a hot fluid passes through the reheater then the condenser in order to be cooled, wherein the condenser is a heat exchanger with plates, which is configured for a cross flow heat exchange between a hot fluid flowing in a hot pass and a cold fluid flowing in a cold pass, the fluids flowing between closing plates, the exchanger comprising:
at least one core band arranged to form edges of the exchanger and to ensure sealing-tightness between the hot pass and the cold pass, a plurality of closing bars disposed between each closing plate and defining, with the closing plates, flow channels for fluids passing through the exchanger, wherein the core band arranged at an inlet of the cold pass and an inlet of the hot pass comprises an inlet for supplying hot air, and a plurality of orifices disposed opposite at least one closing bar of the hot pass adjoining said core band, and wherein at least one closing bar arranged in the lengthwise direction of the inlet of the cold pass comprises an inlet for said hot air opposite one of the orifices of the core band, and a circuit for the flow of said hot air connected to said hot air inlet, said flow circuit being U-shaped and comprising: a first section and a second section each extending over the whole length of the closing bar, a hot air outlet arranged at one end of the second section and configured to expel the hot air in the hot pass at the inlet of the hot pass, and an intermediate section forming the base of the U and connecting the first section to the second section by their end respectively opposite to the hot air inlet and to the hot air outlet.

8 . An air-conditioning system of a vehicle, comprising a reheater-condenser exchanger system as claimed in claim 7 .

9 . An aircraft comprising:
a cabin, an air-conditioning system for supplying the cabin with conditioned air, and a reheater-condenser exchanger system of the air-conditioning system comprising at least a first exchanger, referred to as a reheater, and a second exchanger, referred to as a condenser, the reheater and the condenser being arranged in series so that a hot fluid passes through the reheater then the condenser in order to be cooled, wherein the condenser is a heat exchanger with plates, which is configured for a cross flow heat exchange between a hot fluid flowing in a hot pass and a cold fluid flowing in a cold pass, the fluids flowing between closing plates, the exchanger comprising: at least one core band arranged to form edges of the exchanger and to ensure sealing-tightness between the hot pass and the cold pass, a plurality of closing bars disposed between each closing plate and defining, with the closing plates, flow channels for fluids passing through the exchanger, wherein the core band arranged at an inlet of the cold pass and an inlet of the hot pass comprises an inlet for supplying hot air, and a plurality of orifices disposed opposite at least one closing bar of the hot pass adjoining said core band, and wherein at least one closing bar arranged in the lengthwise direction of the inlet of the cold pass comprises an inlet for said hot air opposite one of the orifices of the core band, and a circuit for the flow of said hot air connected to said hot air inlet, said flow circuit being U-shaped and comprising: a first section and a second section each extending over the whole length of the closing bar, a hot air outlet arranged at one end of the second section and configured to expel the hot air in the hot pass at the inlet of the hot pass, and an intermediate section forming the base of the U and connecting the first section to the second section by their end respectively opposite to the hot air inlet and to the hot air outlet.

Assignees

• Liebherr Aerospace Toulouse Sas

Inventors

• Villar Aymeric
• Bregoli Mickael

Classifications

• F28F9/02

  Header boxes; End plates · CPC title

• F28F17/00

  Removing ice or water from heat-exchange apparatus · CPC title

• F28F19/006

  Preventing deposits of ice · CPC title

• F28F19/002

  by using inserts or attachments · CPC title

• F28D2021/0021

  for aircrafts or cosmonautics · CPC title