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专利名称：Method of monitoring refrigerant level发明人：Walter Demuth,Rainer Heilig,Volker
Kirschner,Martin Kotsch,Hans-JoachimKrauss,Hagen Mittelstrass,HaraldRaiser,Michael Sickelmann,Karl-HeinzStaffa,Christoph Walter
申请号：US10774509申请日：20040210公开号：US07146819B2公开日：20061212
专利附图：
摘要：The invention relates to a method of refrigerant level monitoring in a
refrigerant circuit of an air-conditioning or heat-pump system having a compressor and arefrigerant which may, depending on the operating point, be operated in the supercriticalrange. The method includes standstill level monitoring with the compressor switched offand/or in-operation level monitoring with the compressor switched on. In the case of in-operation level monitoring, the refrigerant overheat (dTü) at the evaporator is registeredand, in the event of excessive overheat, it is concluded that there is underfilling. At astandstill, the pressure and temperature of the refrigerant are registered, and it isconcluded that there is an improper refrigerant filling level if the pressure (p) lies belowa minimum pressure value (p) or the temperature (T) lies above a maximum saturationtemperature value (T) with the pressure being outside a predefinable intended pressurerange ([p,p]).
申请人：Walter Demuth,Rainer Heilig,Volker Kirschner,Martin Kotsch,Hans-JoachimKrauss,Hagen Mittelstrass,Harald Raiser,Michael Sickelmann,Karl-Heinz Staffa,ChristophWalter
地址：Gerlingen DE,Waghaeusel DE,Muehlacker DE,Ludwigsburg DE,StuttgartDE,Bondorf DE,Balingen DE,Stuttgart DE,Stuttgart DE,Stuttgart DE
国籍：DE,DE,DE,DE,DE,DE,DE,DE,DE,DE
代理机构：Foley & Lardner LLP
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