REFRIGERATION APPARATUS

• US 20110011123A1
• Filed: 03/05/2009
• Published: 01/20/2011
• Est. Priority Date: 03/18/2008
• Status: Abandoned Application

• Current Assignee: Daikin Industries Ltd
• Original Assignee: Daikin Industries Ltd
• Inventors: Shibaike, Kouji, Matsuura, Hideki, Tanaka, Masaru, Hara, Hideki, Ohnuma, Youichi
• Application Number:
  US12/920,595
• Publication Number:
  US 20110011123A1
• Time in Patent Office: Days
• US Class Current: 62/468
• CPC Class Codes: C09K 2205/126 Unsaturated fluorinated hydrocarbons
• CPC Class Codes: C09K 5/045 containing only fluorine as halogen
• CPC Class Codes: C10M 171/008 Lubricant compositions compatible with refrigerants
• CPC Class Codes: C10M 2207/2835 used as base material
• CPC Class Codes: C10M 2209/043 used as base material
• CPC Class Codes: C10M 2209/1033 used as base material
• CPC Class Codes: C10N 2020/101 Containing Hydrofluorocarbons
• CPC Class Codes: C10N 2030/02 Pour-point; Viscosity index
• CPC Class Codes: C10N 2030/41 Chlorine free or low chlorine content compositions
• CPC Class Codes: C10N 2030/43 Sulfur free or low sulfur content compositions
• CPC Class Codes: C10N 2040/30 Refrigerators lubricants or compressors lubricants
• CPC Class Codes: F04B 39/023 Hermetic compressors
• CPC Class Codes: F04C 18/0215 where only one member is moving
• CPC Class Codes: F04C 2210/10 working
• CPC Class Codes: F04C 2210/1022 C3HmFn
• CPC Class Codes: F04C 2210/26 Refrigerants with particular properties, e.g. HFC-134a
• CPC Class Codes: F04C 2210/263 HFO1234YF
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F05C 2225/00 Synthetic polymers, e.g. plastics; Rubber
• CPC Class Codes: F05C 2225/02 Rubber
• CPC Class Codes: F05C 2225/04 : PTFE [PolyTetraFluorEthylene]
• CPC Class Codes: F05C 2225/06 : Polyamides, e.g. NYLON
• CPC Class Codes: F25B 9/002 : characterised by the refrigerant

Abstract

In a refrigeration apparatus including a refrigerant circuit in which refrigerant represented by Molecular Formula 1: C₃H_mF_n (note that “m” and “n” are integers equal to or greater than 1 and equal to or less than 5, and a relationship represented by an expression m+n=6 is satisfied) and having a single double bond in a molecular structure, or refrigerant mixture containing the refrigerant is used, predetermined functional resin components arranged so as to contact refrigerant of the refrigerant circuit are made of any of polytetrafluoroethylene, polyphenylene sulfide, phenolic resin, polyamide resin, chloroprene rubber, silicone rubber, hydrogenated nitrile rubber, fluorine-containing rubber, and hydrin rubber.

Claims

1. A refrigeration apparatus, comprising:

a refrigerant circuit in which refrigerant is circulated by a compressor to perform a refrigeration cycle, wherein, as refrigerant of the refrigerant circuit, refrigerant represented by Molecular Formula 1;

C₃H_mF_n, where “

m” and

“

n”

are integers equal to or greater than 1 and equal to or less than 5, and a relationship represented by an expression m+n=6 is satisfied, and having a single double bond in a molecular structure, or refrigerant mixture containing the refrigerant is used; and

predetermined functional resin components arranged so as to contact the refrigerant of the refrigerant circuit are made of any of polytetrafluoroethylene, polyphenylene sulfide, phenolic resin, polyamide resin, chloroprene rubber, silicone rubber, hydrogenated nitrile rubber, fluorine-containing rubber, and hydrin rubber.

2. The refrigeration apparatus of claim 1, wherein

the functional resin components are sliding members provided in predetermined sliding sections;

and

the sliding members are made of any of polytetrafluoroethylene, polyphenylene sulfide, and polyamide resin.

3. The refrigeration apparatus of claim 1, wherein

the functional resin component is a sealing member for reducing or preventing a leakage of refrigerant in a predetermined clearance;

and

the sealing member is made of any of polytetrafluoroethylene, polyphenylene sulfide, chloroprene rubber, silicone rubber, hydrogenated nitrile rubber, fluorine-containing rubber, and hydrin rubber.

4. The refrigeration apparatus of claim 1, wherein,

in the compressor, refrigerant oil is used, which has a saturated water amount of equal to or greater than 2000 ppm at a temperature of 30°

C. and a relative humidity of 90%.

5. The refrigeration apparatus of claim 4, wherein

the refrigerant oil mainly contains at least one of polyalkylene glycol, polyol ester, and polyvinyl ether.

6. The refrigeration apparatus of claim 4, wherein

the refrigerant oil has kinetic viscosity of equal to or greater than 30 cSt and equal to or less than 400 cSt at 40°

C., and a fluid point of equal to or less than −

30°

C.

7. The refrigeration apparatus of claim 4, wherein

the refrigerant oil has surface tension of equal to or greater than 0.02 N/m and equal to or less than 0.04 N/m at 20°

C.

8. The refrigeration apparatus of claim 7, wherein

the refrigerant oil has a chlorine concentration of equal to or less than 50 ppm.

9. The refrigeration apparatus of claim 4, wherein

the refrigerant oil has a sulfur concentration of equal to or less than 50 ppm.

10. The refrigeration apparatus of claim 4, wherein

at least one of additives which are an acid trapping agent, an extreme pressure additive, an antioxidizing agent, an oxygen trapping agent, an antifoam agent, an oiliness agent, and a copper deactivator is added to the refrigerant oil.

11. The refrigeration apparatus of claim 10, wherein,

if a single type of additive is added to the refrigerant oil, the proportion of the additive is equal to or greater than 0.01% by mass and equal to or less than 5% by mass;

and if multiple types of additives are added, the proportion of each additive is equal to or greater than 0.01% by mass and equal to or less than 5% by mass.

12. The refrigeration apparatus of claim 1, wherein

the refrigerant represented by Molecular Formula 1:

C₃H_mF_n where “

m” and

“

n”

are the integers equal to or greater than 1 and equal to or less than 5, and the relationship represented by the expression m+n=6 is satisfied, and having the single double bond in the molecular structure is 2, 3, 3, 3-tetrafluoro-1-propene.

13. The refrigeration apparatus of claim 1, wherein

the refrigerant of the refrigerant circuit is refrigerant mixture further containing difluoromethane.

14. The refrigeration apparatus of claim 1, wherein

the refrigerant of the refrigerant circuit is refrigerant mixture further containing pentafluoroethane.