EP 1367346 B1 20070328 - Method for controlling a defrost operation of an evaporator
Title (en)
Method for controlling a defrost operation of an evaporator
Title (de)
Verfahren zum Steuern des Abtauprozesses eines Verdampfers
Title (fr)
Procédé de commande de l'opération de dégivrage d'un évaporateur
Publication
Application
Priority
DE 10223716 A 20020528
Abstract (en)
[origin: EP1367346A2] Relative humidity of air recycled from the coolant evaporator is measured, and represents the saturated state, having passed through the evaporator. Volumetric flowrate Vl of air circulated through the evaporator is determined. From the state equation for humid air, absolute humidities are determined at the evaporator inlet (XRL) and outlet (XZL). The quantity of water stored in the evaporator is given by DELTAX = XRL - XZL. The equation mW = rho VL DELTAX DELTAt, is used to determine the quantity of water stored during the interval DELTAt at the evaporator, where rhoL is the density of air. Between two defrosting processes, water masses mW determined in this way are summed and compared with an adjustable, desired value. Once this is reached, the defrosting process is initiated.
IPC 8 full level
F25D 21/06 (2006.01); F25B 47/02 (2006.01); F25D 21/00 (2006.01); F25D 21/02 (2006.01)
CPC (source: EP)
F25B 47/02 (2013.01); F25D 21/006 (2013.01); F25D 21/02 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1367346 A2 20031203; EP 1367346 A3 20050803; EP 1367346 B1 20070328; AT E358264 T1 20070415; DE 10223716 A1 20031211; DE 50306888 D1 20070510; ES 2283677 T3 20071101
DOCDB simple family (application)
EP 03010509 A 20030509; AT 03010509 T 20030509; DE 10223716 A 20020528; DE 50306888 T 20030509; ES 03010509 T 20030509