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