Compositions, system and methods for introducing PAG lubricant or refrigerant into an air-conditioning or system using lower or low GWP refrigerant or refrigerant blends
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.
1. A container comprising a composition comprising about 50 to about 80 wt % polyalkylene glycol (PAG) lubricant and about 20 to about 50 wt % of a refrigerant, wherein the refrigerant exhibits a global warming potential (GWP) of less than about 100 wherein the refrigerant comprises HFO-1234yf and wherein the lubricant is miscible with the refrigerant and the lubricant comprises at least one member selected from the group consisting of acid scavengers, performance enhancers and flame suppressants and wherein the container is configured to deliver the composition into a vehicle air conditioning system and the pressure within the container is 160 kPa to 945 kPa.
2. The container of claim 1 wherein the composition further comprises about 1 to about 5 wt % acid scavengers.
3. The container 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 container of claim 1 wherein the composition further comprises about 1 to about 5 wt % performance enhancers.
5. The container of claim 1 wherein the composition further comprises about 1 to about 10 wt % of flame suppressants.
6. A method for delivering a PAG lubricant into a vehicle air conditioning system comprising connecting the container the of claim 1 to the vehicle air conditioning system and transferring the composition into the vehicle air conditioning system wherein the method is conducted under pressure and temperature conditions under which the PAG lubricant is miscible with the refrigerant, and wherein the pressure is between about 315kPa and about 435kPa and the temperature is between about −18° C. and about 37° C.
7. The method of claim 6 further comprising delivering acid scavengers, performance enhancers, or flame suppressants into the vehicle air conditioning system.
8. The method of claim 6 wherein the system comprises a compressor, a condenser, a dryer, an expansion valve, and an evaporator.
9. A kit comprising: a container comprising the container of claim 1 , a hand operated dispenser for controlling the flow of the composition into an air conditioning system and a hose for conveying the composition to the air conditioning system.
10. A container comprising a composition comprising about 1 to about 15 wt % polyalkylene glycol (PAG) lubricant and about 85 to about 99 wt % of a refrigerant, wherein the refrigerant exhibits a global warming potential (GWP) of less than about 100 wherein the refrigerant comprises HFO-1234yf and wherein the lubricant is miscible with the refrigerant and wherein the container is configured to deliver the composition into a vehicle air conditioning system and the pressure within the container is 160 kPa to 945 kPa.