EP 2894421 A1 20150715 - A method for controlling a supply of refrigerant to an evaporator based on temperature measurements
Title (en)
A method for controlling a supply of refrigerant to an evaporator based on temperature measurements
Title (de)
Verfahren zur Steuerung einer Kühlmittelzuführung zu einem Verdampfer auf Basis von Temperaturmessungen
Title (fr)
Procédé pour commander un approvisionnement de réfrigérant vers un évaporateur basé sur des mesures de température
Publication
Application
Priority
EP 14151107 A 20140114
Abstract (en)
A method for controlling a supply of refrigerant to an evaporator (2) of a vapour compression system (1), such as a refrigeration system, an air condition system or a heat pump. The opening degree of the expansion valve (3) is controlled on the basis of an air temperature, T air , of air flowing across the evaporator (2), and in order to reach a reference air temperature, T air, ref . The opening degree is set to the calculated opening degree, overlaid with a perturbation signal. A temperature signal, S 2 , representing a temperature of refrigerant leaving the evaporator (2) is monitored and analysed. In the case that the analysis reveals that a dry zone of the evaporator (2) is approaching a minimum length, the opening degree of the expansion valve (3) is decreased. This provides a safety mechanism which ensures that liquid refrigerant is prevented from passing through the evaporator (2).
IPC 8 full level
F25B 49/02 (2006.01)
CPC (source: EP RU US)
F25B 49/02 (2013.01 - EP RU US); F25B 2500/19 (2013.01 - EP US); F25B 2500/28 (2013.01 - US); F25B 2600/21 (2013.01 - EP US); F25B 2600/2513 (2013.01 - EP US); F25B 2700/21171 (2013.01 - EP US)
Citation (applicant)
WO 2012052019 A1 20120426 - DANFOSS AS [DK], et al
Citation (search report)
- [XYI] DE 4100749 A1 19920716 - DANFOSS AS [DK]
- [Y] US 2007175229 A1 20070802 - REDLICH ROBERT W [US]
- [A] US 2011214438 A1 20110908 - LARSEN LARS FINN SLOTH [DK], et al
- [A] US 2013205815 A1 20130815 - IZADI-ZAMANABADI ROOZBEH [DK], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2894421 A1 20150715; CN 105874289 A 20160817; CN 105874289 B 20180420; RU 2640142 C1 20171226; US 2016327322 A1 20161110; WO 2015106906 A1 20150723
DOCDB simple family (application)
EP 14151107 A 20140114; CN 201480072306 A 20141216; EP 2014077904 W 20141216; RU 2016125862 A 20141216; US 201415109521 A 20141216