Back to results
US 4,482,114 AGranted
Integrated thermal anti-icing and environmental control system
AssigneeThe Boeing Company
InventorsAlankar Gupta, Kenneth L. Waters
Life of this patent
Estimating the term…
Abstract
Hot compressed air is bled from the compressor of an engine and a portion of it is directed through a flow through type indirect heat exchanger of ring form located within an annular chamber in the engine cowl which is partially formed by lip surfaces of the inlet. Such air gives up heat to low pressure air within such chamber which carries the heat to the inlet surfaces. The compressed air is then removed from the heat exchanger and is admixed with additional hot compressed air. A part of the mixture is delivered to a wing TAI subsystem and a second portion is used for cabin conditioning and pressurization.
Claims37
A pneumatic service system aboard an airplane, comprising:
- a source of hot compressed air;
- a first region requiring heat for combating ice formation including a flow through heat exchanger means having an inlet and an outlet;
- a second region requiring temperature conditioned compressed air;
- an air mixing station;
- first duct means delivering a first portion of the hot compressed air to the inlet of said heat exchanger means;
- second duct means delivering a second portion of the hot compressed air to the air mixing station;
- third duct means delivering air from the outlet of the heat exchanger means to the air mixing station;
- fourth duct means delivering mixed air from the air mixing station to said second region;
- wherein the first region requiring heat for combating ice formation is an engine inlet cowl having cowl wall means defining the leading edge portions of the inlet cowl and an internal wall defining with said cowl wall means an annular chamber inside the cowl;
- said heat exchanger means comprising circumferential tube means situated inside of said chamber through which the first portion of the hot compressed air flows;
- and
- means for circulating low pressure heat transfer air through the cowl chamber, said heat transfer air having a pressure that is lower than the pressure of said hot compressed air, for picking up heat from the first heat exchanger means and delivering it to the cowl wall means.
9 more elements
A pneumatic service system aboard an airplane, comprising:
- a source of hot compressed air;
- a first region requiring heat for combating ice formation including a first flow through heat exchanger means having an inlet and an outlet;
- a second region requiring heat for combating ice formation, including a second heat exchanger means having an inlet;
- air mixing means having a primary air inlet, a secondary air inlet, a mixed air outlet, and an ambient air inlet including check valve means adapted to open in response to a drop in pressure within the air mixing means below the ambient pressure, to admit ambient air into the air mixing means as a second source of secondary air;
- first duct means delivering a first portion of the hot compressed air to the inlet of said first heat exchanger means;
- second duct means delivering a second portion of the hot compressed air to the primary air inlet of the air mixing means;
- third duct means delivering air from the outlet of the first heat exchanger means directly to the secondary air inlet of the air mixing means;
- and
- fourth duct means delivering mixed primary and secondary air from the outlet of the air mixing means to the inlet of the second heat exchanger means.
6 more elements
A pneumatic service system aboard an airplane, comprising:
- a source of hot compressed air;
- a first region requiring heat for combating ice formation including a first flow through heat exchanger means having an inlet and an outlet;
- a second region requiring heat for combating ice formation, including a second heat exchanger means having an inlet;
- air mixing means positioned between the first and second regions, said air mixing means having a primary air inlet, a secondary air inlet and a mixed air outlet;
- first duct means delivering a first portion of the hot compressed air to the inlet of said first heat exchanger means;
- second duct means delivering a second portion of the hot compressed air to the primary air inlet of the air mixing means;
- third duct means delivering air from the outlet of the first heat exchanger means directly to the secondary air inlet of the air mixing means;
- fourth duct means delivering mixed primary and secondary air from the outlet of the air mixing means to the inlet of the second heat exchanger means;
- means for sensing the temperature of air in the third duct means;
- flow control valve means in the first duct means;
- means for adjusting said flow control valve means in response to a change in temperature in the third duct means sensed by the temperature sensing means, for automatically controlling the flow rate of hot compressed air into the first heat exchanger means as a way of maintaining the air flowing through the third duct means at a desired temperature level;
- temperature sensing means in the fourth duct means;
- flow control valve means in the second duct means;
- and
- means for regulating said flow control valve means in response to a change in temperature of the air flowing through the fourth duct means, sensed by said second temperature sensing means, for adjusting the flow rate of hot compressed air into the primary air inlet of the air mixing means as a way of maintaining the air which is delivered from the air mixing means to the second heat exchange means at a desired temperature level for use in the second heat exchanger means.
12 more elements
A pneumatic service system aboard an airplane, comprising:
- a source of hot compressed air;
- a first region requiring heat for combating ice formation including a first flow through heat exchanger means having an inlet and an outlet;
- a second region requiring heat for combating ice formation, including a second heat exchanger means having an inlet;
- air mixing means positioned between the first and second regions, said air mixing means having a primary air inlet, a secondary air inlet and a mixed air outlet;
- first duct means delivering a first portion of the hot compressed air to the inlet of said first heat exchanger means;
- second duct means delivering a second portion of the hot compressed air to the primary air inlet of the air mixing means;
- third duct means delivering air from the outlet of the first heat exchanger means directly to the secondary air inlet of the air mixing means;
- fourth duct means delivering mixed primary and secondary air from the outlet of the air mixing means to the inlet of the second heat exchanger means;
- means for sensing the temperature of air in the third duct means;
- flow control valve means in the first duct means;
- means for adjusting said flow control valve means in response to a change in temperature in the third duct means sensed by the temperature sensing means, for automatically controlling the flow rate of hot compressed air into the first heat exchanger means as a way of maintaining the air flowing through the third duct means at a desired temperature level;
- wherein the first region requiring heat for combatting ice formation is an engine inlet cowl having cowl wall means defining the leading edge portions of the inlet cowl and an internal wall defining with said cowl wall means an annular chamber inside the cowl;
- the first heat exchanger means comprises circumferential tube means situated inside of said chamber through which the first portion of the hot compressed air flows;
- and
- means for circulating low pressure heat transfer air through the cowl chamber, said heat transfer air having a pressure that is lower than the pressure of said hot compressed air, for picking up heat from the first heat exchanger means and delivering it to the cowl wall means.
12 more elements
Dependencies are inferred from the claim text.