detecting {HEAD ~ a temperature} of {TAIL ~ said refrigerant} at a refrigerant flow passage where the refrigerant passes; and 
detecting { HEAD ~ a temperature } of { TAIL ~ said refrigerant } at a refrigerant flow passage where the refrigerant passes ; and
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH