US12441949B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12441949-B2 |
| Application number | US-202217894441-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 24, 2022 |
| Priority date | Jan 23, 2018 |
| Publication date | Oct 14, 2025 |
| Grant date | Oct 14, 2025 |
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Compositions, systems, and methods for introducing lubricants, and additives, that are designed to work with environmentally friendly refrigerants into vehicle heat management systems including passenger compartment air conditioning (A/C) systems are disclosed. Methods for charging lubricants and specific additives using environmentally desirable (low GWP) refrigerant or refrigerant blend compositions into an environmentally friendly system, such as a system that uses HFO-1234yf, are also disclosed.
Opening claim text (preview).
What is claimed is: 1. A composition comprising about 50 to about 80 wt % polyol ester lubricant and about 20 to about 50 wt % of a fluoroolefin refrigerant comprising 1234yf, wherein the refrigerant exhibits a global warming potential (GWP) of less than about 150 wherein the lubricant is miscible with the refrigerant at over a temperature range of −18° C. to 37° C. at a pressure of 160 kPa to 945 kPa within a sealed container when measured using ASHRAE 97: 2007, wherein the lubricant comprises less than 50 ppm water when measured in accordance with ASTM E284, and wherein the composition has a total acid number less than one of 3.3 mg KOH/g, 1.5 mg KOH/g and 1.0 mg KOH/g as measured per ASTM D664-01 at 175° C. 2. The composition of claim 1 further comprising about 1 to about 5 wt % acid scavengers. 3. The composition of claim 2 , wherein the acid scavengers comprise at least one member selected from the group consisting of hexamethyldisiloxane, polydimethylsiloxane, polymethylphenylsiloxane, dodecamethylpentasiloxane, decamethylcyclo-pentasiloxane, decamethyltetrasiloxane, or octamethyltrisiloxane. 4. The composition of claim 1 further comprising about 1 to about 5 wt % performance enhancers. 5. The composition of claim 1 further comprising about 1 to about 10 wt % of flame suppressants. 6. The composition of claim 1 further comprising at least one member selected from the group consisting of tolyltriazole or substituted derivatives thereof, amines, ethoxylated phosphate esters, phosphate alcohols, zinc dialkyldithiophosphates, mercaptobenzothiazoles and 2,5-dimercapto-1,3,4-triadiaZole derivatives. 7. The composition of claim 1 wherein the fluoroolefin refrigerant further comprises 1234ze. 8. A container comprising the composition of claim 1 configured to deliver the composition into a vehicle air conditioning system. 9. The container of claim 6 , wherein the pressure within the container is 160 kPa to 945 kPa. 10. A system for delivering the composition of claim 1 to an automotive air conditioning system comprising: a container comprising the composition, an electric compressor, a condenser, a dryer, an expansion valve, and an evaporator. 11. A method for delivering a lubricant into a vehicle air conditioning system comprising connecting a container comprising the composition of claim 1 to the vehicle air conditioning system and transferring the composition into the vehicle air conditioning system. 12. The method of claim 11 further comprising delivering acid scavengers, performance enhancers, or flame suppressants into the vehicle air conditioning system. 13. The method of claim 11 wherein at least a portion of the lubricant is atomized when delivering the lubricant into the vehicle air conditioning system and the vehicle comprises an electrified vehicle. 14. The method of claim 13 , wherein the pressure is between about 315 kPa and about 435 kPa and the temperature is between about −18° C. and about 37° C. 15. A method of exchanging heat comprising charging and circulating the composition of claim 14 to and through one of a mobile or stationary refrigerating system.
Refrigerators lubricants {or compressors lubricants} · CPC title
Resistance to extreme temperature · CPC title
containing aliphatic substituents · CPC title
Unspecified siloxanes; Silicones · CPC title
having a silicon-to-carbon bond, e.g. organo-silanes · CPC title
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