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Compressor lubricant composition

A technology of lubricating composition and compressor, which is applied in the direction of lubricating composition and petroleum industry, etc. It can solve the problem of lubrication of components that cannot be used in compressors, imperfect miscibility of lubricating oil, and the influence of refrigeration fluid and lubricating oil on the service life and efficiency of air-conditioning systems and other issues, to achieve the effect of favorable cost price, good miscibility and excellent performance

Active Publication Date: 2021-11-02
TOTAL MARKETING SERVICES SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In fact, the poor miscibility of the refrigerant fluid with the lubricating oil can negatively affect the service life and efficiency of the air conditioning system
For example, when the refrigerant fluid is poorly miscible with lubricating oil, the latter tends to get trapped at the evaporator and not return to the compressor, thus failing to adequately lubricate the compressor's components
[0011] Unfortunately, HFC-based refrigerant fluids such as R134a and / or HFO-1234yf exhibit generally imperfect miscibility with lubricating oils commonly used in air conditioning systems

Method used

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  • Compressor lubricant composition
  • Compressor lubricant composition
  • Compressor lubricant composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0199] Example 1: Preparation of lubricating composition according to the invention

[0200] The lubricating composition according to the present invention was prepared by simply mixing the following components at ambient temperature in the mass ratios shown in Table 1 below.

[0201] [Table 1]

[0202] components Lubricating formula (% mass) PAG A 91.7 PAG B 8 Antioxidants 0.2 antiwear agent 0.1

[0203] Used PAG A is the copolymer of propylene oxide-ethylene oxide, is formed by the propylene oxide of greater than 97 mass % (KV100=7.98mm 2 / s, KV40=39.95mm 2 / s, hydroxyl value (ASTM E1899-08)=61.4mgKOH / g).

[0204] PAG B is a copolymer of propylene oxide and ethylene oxide (PO / EO 4 / 6 quality) (KV100=178mm 2 / s, KV40=1050mm 2 / s, hydroxyl value=59.6mgKOH / g).

[0205] Antioxidants are phenolic compounds.

[0206] The antiwear / extreme pressure agent is a phosphate ester amine salt.

[0207] The properties of the compositions thus...

Embodiment 2

[0210] Example 2: Thermal stability performance evaluation in the presence of refrigerant HFO-1234yf

[0211] Two lubricating compositions were evaluated:

[0212] - lubricating composition I1 according to the invention in combination with PAG A according to the invention, designated as PAG A (1) , with the following properties: hydroxyl value = 57mgKOH / g; KV40 = 39.96mm 2 / s; KV100=7.97mm 2 / s; and PAG B according to the present invention has the following properties: KV40=1000mm 2 / s and KV100=178.0mm 2 / s; and

[0213] - Commercial lubricating composition C1 comprising PAG A according to the invention, labeled as PAG A (2) , with the following properties: hydroxyl value = 55mgKOH / g; KV40 = 39.96mm 2 / s; KV100=7.97mm 2 / s, but without PAG B.

[0214] The two types of polyalkylene glycols used in the context of this example are:

[0215] PAG A (1) and PAG A (2) : polyalkylene glycol formed from at least 96% by mass of oxypropylene units; its ends are not capped a...

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Abstract

The present invention relates to a lubricant composition intended for a refrigeration system comprising a gas compression circuit, comprising: at least a first polyalkylene glycol having a hydroxyl number strictly greater than 50 mgKOH / g and a kinematic viscosity, measured at 100 DEG C according to standard ASTM D445, ranging from 5 to 10 mm<2> / s; and at least a second polyalkylene glycol having a kinematic viscosity, measured at 100 DEG C, ranging from 100 to 500 mm<2> / s, wherein said polyalkylene glycols A and B are present in a PAG(s) A / PAG(s) B weight ratio of between 60 / 40 and 99 / 1. It also relates to the use of such a lubricant composition in a refrigeration system comprising a gas compression circuit, in particular for a motor vehicle air-conditioning system, in combination with a refrigerant based on hydrocarbon-based compounds, such as R134a and / or HFO-1234yf.

Description

technical field [0001] The present invention relates to a lubricating composition intended for use in refrigeration systems comprising gas compression circuits, and more particularly in compressors of automotive air conditioning systems, operating in the presence of hydrofluorocarbon refrigerants, said hydrofluorocarbons The hydrocarbons are especially based on 1,1,1,2-tetrafluoroethane (R134a) and / or 2,3,3,3-tetrafluoropropene (HFO-1234yf). Background technique [0002] Generally, an air conditioning system intended to cool the passenger compartment of a motor vehicle comprises an evaporator, a compressor, a condenser, an expansion valve and a heat transfer fluid called refrigerant or refrigerant. [0003] This air-conditioning device is based on the following: a thermodynamic cycle, including the evaporation of a refrigerant fluid at low pressure (where the fluid absorbs heat); compression of the evaporated fluid to a high pressure, where the evaporated fluid condenses to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M171/00
CPCC10M171/008C10M2223/043C10M2209/1033C10M2209/1045C10M2209/1055C10M2207/026C10N2020/04C10N2020/02C10N2020/101C10N2030/10C10N2040/30C10M2207/023C10M2209/107C10N2030/06
Inventor J·阿尔戈F·米歇尔
Owner TOTAL MARKETING SERVICES SA