The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2001
Filed:
Jul. 18, 2000
Applicant:
Inventor:
Herbert Wieszt, Grafenau, DE;
Assignee:
DaimlerChrysler AG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B 4/902 ;
U.S. Cl.
CPC ...
F25B 4/902 ;
Abstract
The invention relates to a method for monitoring the refrigerant level in an air conditioner, in particular a motor vehicle air conditioner, with a compressor which subdivides the refrigerant circuit into a high-pressure side and a low-pressure side. The method includes the steps of measuring the pressure and the temperature on the high-pressure side at time intervals, determining an assigned temperature using the measured pressure with the aid of a refrigerant-specific function, and determining a refrigerant undercooling value which can be evaluated as a measure of the refrigerant level by subtracting the measured temperature from the assigned one.