HVAC-R flushing solvent
View Patent ↗A flushing solvent for flushing an HVAC-R system is a mixture of hydrofluoroether, acetone, t-Butyl acetate, and trans 1,2 Dichloroethylene.
1. A flushing solvent comprising,
1-40% hydrofluoroether,
1-40% acetone,
1-40% t-butyl acetate and
20-70% trans 1,2 dichloroethylene.
2. The flushing solvent of claim 1 containing,
18% hydrofluoroether,
10% acetone,
22% t-butyl acetate and
50% trans 1,2 dichloroethylene.
3. The flushing solvent of claim 1 wherein the hydrofluoroether is ethoxy-nonafluorobutane.
4. The flushing solvent of claim 3 wherein the ethoxy-nonafluorobutane is selected from ethyl nonafluorobutyl ether, nonafluoroisobutyl ether or mixtures thereof.
5. The flushing solvent of claim 4 containing,
10-20% ethyl nonafluorobutyl ether,
10-20% ethyl nonafluoroisobutyl ether,
10-20% acetone,
20-30% t-butyl acetate, and
50-60% trans 1,2 dichloroethylene.
6. A kit comprising the flushing solvent of claim 1 in a container.
7. The kit of claim 6 further comprising
charging hose,
clip-on funnel,
injector trigger nozzle, and
reusable tank.
8. The kit of claim 7 , wherein the reusable tank has a pressure relief valve.
9. A method for flushing an HVAC-R compressor system having an inlet and a discharge comprising,
a) introduce the solvent of claim 1 into the inlet,
b) purge the solvent,
c) check the solvent exiting the outlet for the presence of contaminants, and
d) repeat steps a)-c) if contamination is present.
10. The method of claim 9 wherein step c) involves a visual inspection and steps a)-c) are repeated if the exiting solvent from the outlet is not clear.