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US 7,017,365 B2Granted
System for dehumidification in air conditioners
AssigneeLiebherr-Aerospace Lindenberg GmbH
InventorsJoachim Haas, Alfred Sauterleute
Life of this patent
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Abstract
The present invention relates to a system for dehumidification in air conditioners comprising an expansion stage, a condenser and comprising a water separator disposed upstream of the expansion stage. A dehumidification system with reduced system construction volume, reduced weight and increased reliability and improved system efficiency at lower cost is formed in accordance with the invention in that the condenser is formed by a heat exchanger (RAM heat exchanger) cooled with ambient air or stagnation air or with another fluid, with the exception of process air, to which the compressed air to be dehumidified is fed on the compressed air side.
Claims43
A system for dehumidification in air conditioners, comprising
- an expansion stage,
- a condenser, and
- a water separator upstream of the expansion stage,
- wherein
- the condenser is formed by a heat exchanger (RAM CON) cooled by ambient air or stagnation air or another fluid, with the exception of process air, to which the compressed air to be dehumidified is supplied,
- the heat exchanger is a RAM heat exchanger, and
- (i) the RAM heat exchanger (RAM CON) is divided into two and the heat exchanger region facing the outlet side on the compressed air side is acted upon by air or another fluid whose temperature is under the ambient air temperature or stagnation air temperature, or
- (ii) a bypass which can be closed by a valve (ATV) and which bypasses the water separator (WE) is provided which is in communication with the inlet of the expansion unit.
5 more elements
A system for dehumidification in air conditioners, comprising
- an expansion stage,
- a condenser, and
- a water separator disposed upstream of the expansion stage, wherein
- the condenser is formed by a heat exchanger (RAM CON) cooled by ambient air or stagnation air or another fluid, with the exception of process air, to which the compressed air to be dehumidified is supplied,
- the heat exchanger is a RAM heat exchanger,
- a primary heat exchanger (PHX) is disposed upstream of the RAM heat exchanger (RAM CON) on the compressed air side,
- the RAM heat exchanger (RAM CON) and the primary heat exchanger (PHX) are arranged in the stagnation air channel such that the primary heat exchanger (PHX) partly serial or partly parallel to the RAM heat exchanger (RAM CON) is acted upon by ambient air or stagnation air, and
- the RAM heat exchanger (RAM CON) has no cooling fins on the stagnation air side in the discharge region on the compressed air side.
5 more elements
A system for dehumidification in air conditioners, comprising
- an expansion stage,
- a condenser, and
- a water separator disposed upstream of the expansion stage, wherein
- the condenser is formed by a heat exchanger (RAM CON) cooled by ambient air or stagnation air or another fluid, with the exception of process air, to which the compressed air to be dehumidified is supplied,
- the heat exchanger is a RAM heat exchanger, and
- (i) means are provided through which the cabin air can be fed to the RAM heat exchanger (RAM CON) as cooling air, and the mixing in of the cabin air on the stagnation air side takes place in the discharge region of the RAM heat exchanger (RAM CON) on the compressed air side, or
- (ii) an expansion turbine is provided for the expansion of cabin vitiated air, means are provided through which the expanded cabin air can be fed to the RAM heat exchanger (RAM CON) as cooling air, and the RAM heat exchanger (RAM CON) is divided into two and the heat exchanger region facing the outlet side on the compressed air side is acted upon by the expanded air.
4 more elements
A system for dehumidification in air conditioners, comprising
- an expansion stage,
- a condenser, and
- a water separator disposed upstream of the expansion stage, wherein
- the condenser is formed by a heat exchanger (RAM CON) cooled by ambient air or stagnation air or another fluid, with the exception of process air, to which the compressed air to be dehumidified is supplied,
- the heat exchanger is a RAM heat exchanger,
- a reheater (REH, R, RE) is provided which is disposed upstream of the expansion stage and acted upon by warm air to evaporate residual water in the air fed to the expansion stage, and
- one of the following (i)–(vi):
- (i) the reheater (REH, R) is in communication on its hot air side with the compressed air inlet of the RAM heat exchanger (RAM CON, RAM) on the inlet side and with the inlet of a compressor (C) disposed on the compressed air side upstream of the RAM heat exchanger (RAM CON, RAM ) on the outlet side,
- (ii) the reheater (REH, R) is in communication on its hot air side with the inlet side of a restrictor disposed upstream of the compressed air inlet of the RAM heat exchanger (RAM CON, RAM) on the inlet side and with the inlet of the heat exchanger (RAM CON, RAM) on the outlet side,
- (iii) the reheater (REH) is in communication on its hot air side with the inlet of a heat exchanger (PHX), which is disposed upstream of a compressor (C) disposed upstream of the RAM heat exchanger (RAM CON, RAM) on the inlet side and with the inlet of the compressor (C) on the outlet side,
- (iv) the reheater (REH, R) is in communication on its hot air side with the inlet of a restrictor disposed upstream of a compressor (C) on the inlet side and with the inlet of the compressor (C) on the outlet side,
- (v) the reheater (REH) is in communication on its hot air side with the installation space of the air conditioner on the inlet side and with the discharge of the RAM heat exchanger (RAM CON, RAM) on the stagnation air side or of another heat exchanger on the outlet side,
- (vi) the bypass with a valve (ATV) bypasses the water separator (WE) and the reheater (REH).
10 more elements
Dependencies are inferred from the claim text.