US 4,852,363 A · Air conditioner humidity control system

Abstract

In an air conditioner for a motor vehicle, which, for the purpose of contling the humidity, has in the ir duct suitable devices, controlled by a microcomputer. The microcomputer receives values for outside temperature, inside temperature and inside humidity, measured by sensors. From the values for outside temperature, inside temperature and inside humidity, the microcomputer determines the threshold humidity (l.sub.thresh) as the ratio of the saturated vapor pressure (P.sub.S) inside at the pane and the saturated vapor pressure (P.sub.i) of the inside air. If this difference (.DELTA.l) between threshold humidity (l.sub.thresh) and inside humidity (l.sub.i) falls below a stipulated value (x), dehumidification devices are actuated. If the stipulated value is exceeded, humidification devices are actuated.

Claims16

Dependent claims

An air conditioner for controlling the humidity within a motor vehicle having a window pane comprising:

an air duct;
means within the air duct for varying the humidity of air passing through the air duct;
means for measuring and generating signals representing measured values for outside temperature, temperature inside the vehicle and humidity inside the vehicle;
and
means, including a microcomputer, for selectively operating said humidity varying means in response to signals received representing said values for outside temperature, inside temperature and inside humidity and for determining a threshold humidity as a ratio of the saturated vapor pressure inside the window pane and the saturated vapor pressure of the inside air, the microcomputer actuating the humidity varying means if the difference between threshold humidity and inside humidity differs from a first stipulated value.

2 more elements

Dependencies are inferred from the claim text.

Air conditioner humidity control system

Life of this patent

Air conditioner humidity control system

Life of this patent

Abstract

Claims16