Samsung Electronics 234Piping DiagramDSH (Discharge Super Heat) protectionƒ PurposePrevent liquid compression to protect the system and compressors.ƒ ConceptThe compressor Suction Super Heat (SH) is raised to increase the DSH.- DSH = Compressor discharge temp. – High pressure saturation temp.- The compressor discharge temperature is defined during DSH protection control :Min { Max(Tdis_comp1, Ttop_comp1), Max(Tdis_comp2, Ttop_comp2) }ƒ Control specifications in detail- The target superheat changes to 6 K if the DSH is 10 K or lower.(QWKDOS\3UHVVXUH3K'LDJUDP$I WHU'6+SURWHFWLRQ%HIR UH'6+SURWHFWLRQ'6+LQFUHDVH6+LQFUHDVH1RUPDO2SHUDWLRQ'6+ . First heating release : the target SH is 3 K if in this state for 30 secSecond heating release : SH release occurs 2 min after the first releaseif the DSH is below 15 KFirst cooling release : the target SH is 3 K if in this state for 30 secSecond cooling release : SH release occurs 2 min after the first release ifthe DSH is above 10 K- If in this state for 30 sec,∙ Cooling : Indoor unit EEV Target SH 6 K∙ Heating : Main EEV Target SH 6 K7-3 Functions (cont.)7-3-2-5 Protective control (cont.)7-3-2 Control (cont.)
