Air conditioning apparatus
US5701753A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1996 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Jun 25, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
In the heating operation mode, the condensed temperature is calculated by the value of the discharged pressure sensor disposed at the discharge side of the compressor. Based on a difference between the condense temperature and a value of the outlet temperature sensor for detecting the refrigerant having passed through the heating indoor heat exchanger, the supercooling degree is calculated. Then, an opening degree of the expansion valve for heating is controlled so that the calculated supercooling degree is set to a target supercooling degree. Thus, since the condensed temperature is calculated by employing a high responsive pressure sensor, an error in the calculation of the condensed temperature can be reduced, thereby reducing an error in the calculation of the supercooling degree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.