Air conditioning system
US5775415A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1994 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Jul 7, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60H1/00735
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An air conditioning system for an automobile having an evaporator, in a refrigerating circuit, and a heater core which is located downstream from the evaporator in a duct having an inlet for introduction of air and an outlet for discharging the air into a cabin, and an air mix damper for controlling the ratio of the amount of air into the heater core and the amount of air by-passing the heater core. The degree of the opening of the air mix damper is controlled in accordance with the cooling capacity at the evaporator sensed by an after-evaporator temperature sensor so that a target value of the temperature of the air discharged into the cabin is obtained. A correction of the degree of opening of the air mix damper is done by estimating an actual temperature at the after-evaporator sensor during a transient state of the system between the ON and OFF conditions of a compressor, so that a desired setting of the air conditioning state is maintained. The target air temperature is not corrected if it is determined that the system is in a heating mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.