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US 4,308,993 AGranted
Heating system
AssigneeThe Garrett Corporation
InventorLinus B. Buss
Life of this patent
Estimating the term…
Abstract
A heating system which uses bleed air to heat and recirculate cabin air for the passenger space of a vehicle.
Claims31
A method for heating an enclosure comprising the steps of:
- a. supplying air from a hot high pressure compressor bleed source through either a heat exchanger or a heat exchanger bypass duct and then through a turbine to drive the turbine and a fan connected for rotation therewith;
- and
- b. drawing air from the enclosure through the heat exchanger with the fan for heat exchange with the heat exchanger and for further heating of the air from the enclosure and for returning that air to the enclosure.
A method of heating an enclosure comprising the steps of:
- a. controllably supplying fluid from a hot high pressure compressor bleed source through either a heat exchanger or a heat exchanger bypass duct and then through a turbine to drive the turbine and a fan connected for rotation therewith;
- and
- b. moving fluid with the fan from the enclosure through the heat exchanger for heat exchange therewith and for further heating the fluid from the enclosure, and for return of that fluid to the enclosure.
A method of heating an enclosure comprising the steps of:
- a. supplying air from a hot high pressure compressor bleed source through a heat exchanger and then through a turbine to drive the turbine and a fan connected for rotation therewith;
- b. drawing air from the enclosure through the heat exchanger with the fan for heat exchange with the heat exchanger and for further heating of the air from the enclosure and for returning that air to the enclosure;
- c. controllably bypassing source air through a bypass duct around the heat exchanger to adjust the amount of heating of the air from the enclosure;
- and
- d. controlling the flow rate of source air through the heat exchanger generally inversely to the flow rate of the source air through the bypass duct and in response to the temperature of the air in the enclosure.
2 more elements
A heating system for heating an enclosure comprising:
- a. a compressor bleed source of hot fluid under pressure;
- b. a heat exchanger;
- c. a turbine and fan connected for simultaneous rotation;
- d. means for circulating fluid to be heated from the enclosure through the heat exchanger in heat exchange relationship therewith and then through the fan for further heating and for return to the enclosure;
- and
- e. a first source fluid flow path means for directing said source fluid through said heat exchanger in heat exchange relationship therewith and then through said turbine for driving the turbine;
- f. a second source fluid flow path heat exchanger bypass means for directing said source fluid from said source directly to said turbine for driving the turbine;
- and
- g. means for controlling the amount of source fluid flowing through said first and second source fluid flow path means to control the heat content of the fluid in the enclosure.
6 more elements
A heating system for heating an enclosure comprising:
- a. a source of hot pressurized compressor bleed air;
- b. a heat exchanger;
- c. means forming a primary air flow path for controllably circulating air from the source either through the heat exchanger or through a heat exchanger bypass duct means;
- d. means forming a secondary air flow path for circulating air from the enclosure through the heat exchanger in heat exchange relation therewith and then for returning that air to the enclosure to control the heat content of the air in the enclosure;
- and
- e. an air cycle machine having a turbine disposed along the primary air flow path downstream of the heat exchanger for rotational driving by the air in the primary air flow path, and a fan rotatable with the turbine and disposed along the secondary air flow path for heating of the air therein, and for moving that air for return to the enclosure.
3 more elements
A heating system for heating an enclosure comprising:
- a. a source of hot pressurized compressor bleed air;
- b. a heat exchanger;
- c. a primary conduit for circulating air from the source through the heat exchanger;
- d. a secondary conduit for circulating air from the enclosure through the heat exchanger in heat exchange relation therewith, and then for returning that air to the enclosure to control the temperature of the air in the enclosure;
- e. an air cycle machine having a turbine disposed within the primary conduit downstream of the heat exchanger for rotational driving by the air from the source, and a fan rotatable with the turbine and disposed within the secondary conduit downstream of the heat exchanger for heating of the air within the secondary conduit and for moving that air for return to the enclosure;
- and
- f. bypass means connected from the source to the turbine for controllably bypassing source air around the heat exchanger.
4 more elements
Dependencies are inferred from the claim text.