CN103089570A

CN103089570A - Compressor

Info

Publication number: CN103089570A
Application number: CN201110331934XA
Authority: CN
Inventors: 龙春仙
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Midea Toshiba Compressor Corp; Guangdong Meizhi Compressor Co Ltd
Priority date: 2011-10-27
Filing date: 2011-10-27
Publication date: 2013-05-08

Abstract

Disclosed is a compressor. A motor is contained in a closed shell. A compression mechanism for compressing refrigerant is connected with the motor through a rotary shaft. The compressor is provided with refrigerating machine oil. The refrigerant is hydrocarbon refrigerant. Base oil of the refrigerating machine oil is made of polyalkane propylene and meets the requirements of a general formula a as followed. More than one of antioxidant, acid catcher, defoamer and squeeze antiwear agent is added into the refrigerating machine oil. The refrigerating machine oil and the hydrocarbon refrigerant are low in solubility. System performance and compressor reliability are both stable when coolant sealing amount is low.

Description

Compressor

Technical field

The present invention relates to a kind of compressor.

Background technique

In recent years; purpose for the environment of preserving our planet; the refrigeration agent that is used for cooling cycle system begins to shift to natural series coolant from traditional freon R22, hydrogen fluorohydrocarbon HFC. particularly as the alkyl refrigeration agent of natural series coolant; from the low viewpoint of global warming coefficient GWP, propane R290 refrigeration agent is subject to more and more people and pays close attention to.

but when the alkyl refrigeration agent is used for the compression refrigerating machine, adopt existing mineral oil, alkylbenzene, when synthesizing POE oil as lubricant oil, because base oil and refrigeration agent dissolve fully, therefore reduced Basic oil Viscosity, thereby reduced lubrication effect. cause compressor wear resistance and sealing to descend, compressor performance and life-span greatly reduce. simultaneously, in view of hydrocarbon coolant has combustibility, therefore from reducing the impact consideration that produces to external leakage, should reduce the amount of the refrigeration agent that adds in refrigeration system. because the refrigeration agent that is dissolved in refrigerator oil will provide less cooling effect, come the part refrigeration agent of complement lysis in lubricant oil so just must increase the enclosed volume of refrigeration agent, so just produce conflict, combustibility due to refrigerant, refrigeration agent in requirement inclosure system is more few better, on the other hand due to refrigeration agent and oily solubility large, must enclose more refrigeration agent for guaranteeing compressor performance. so the refrigerator oil of How to choose and refrigeration agent suitable solubility, to become the key of dealing with problems.

Chinese patent literature CN1938406A discloses a kind of refrigerated machine oil composition on March 28th, 2007, comprise (A) refrigerant, contain, as key component, C1-8 hydrocarbon compound and (B) base oil, comprise the polyalkane glycol ethers of special construction and/or the polyvinylether of specified structure, wherein refrigerant solubility in base oil (B) under 40 ℃ and 1.2MPa is equal to or less than the mixture viscosity of 40wt% and refrigerated machine oil composition, measure under 90 ℃ and 2.3MPa, be equal to or greater than 0.1mm ²/ s.The base oil of this refrigerated machine oil composition adopts the polyalkane glycol ethers, but the ethylene oxide that contains in its structure of molecule is many, and the solubility of this refrigerator oil and refrigeration agent is larger, and is not suitable for hydrocarbon refrigerant.

Summary of the invention

The solubility that purpose of the present invention aims to provide a kind of refrigerator oil and hydrocarbon coolant is lower, in the situation that the equal more stable compressor of the reliability of the performance of less refrigerant enclosed volume system and compressor, to overcome deficiency of the prior art.

A kind of compressor by this purpose design, taken in motor in closed shell, be connected by running shaft with this motor, have a compressing mechanism that refrigeration agent is compressed, and refrigerator oil, it is characterized in that refrigeration agent is hydrocarbon refrigerant, the base oil of refrigerator oil adopts the polyalkane glycol ethers.

Described base oil satisfies the requirement of general formula a,

General formula a;

Wherein, R ¹And R ²Represent respectively the hydrocarbyl group of hydrogen atom, 1～18 carbon or the carboxyl groups of 1～28 carbon, but R ¹And R ²Can not be hydrogen atom simultaneously; M representative ring oxidative ethane CH ₂The quantity of CHO, m is 〉=1 integer; N representative ring Ethylene Oxide CH ₂CH ₂The quantity of O, n is 〉=0 integer; And m, n satisfy formula b and require:

\frac{n}{m} \leq \frac{2}{3}

Formula b.

Described refrigerating machine oil viscosity is 10～100mm in the time of 40 ℃ ²/ s.

Be added with more than one in antioxidant, sour agent for capturing, defoamer and extruding antiwear additive in described refrigerator oil.

Described extruding antiwear additive is selected one at least from the group that the alkyl polyoxyalkylene phosphate ester of molecular formula c or molecular formula d representative forms, this extruding antiwear additive is joined in the base oil of refrigerator oil by 0.05%～10% of the gross mass of the base oil of refrigerator oil, and 0.05%～10% is mass percent;

Molecular formula c;

Molecular formula d;

Wherein, R ₄An alkyl with 1～8 carbon atom, R ₅H or the alkyl with 1～3 carbon atom.

Add above-mentioned extreme pressure anti-wear additives in refrigerator oil, the lubricating ability of oil product under heavy load can be provided, reduce the friction factor between the motion component, improve the antiwear property of component, reduce the component wearing and tearing, the projected life of improving compressor.

Described extruding antiwear additive is a kind of dialkyl phosphate take molecular formula e as representative, and this extruding antiwear additive is joined in the base oil of refrigerator oil by 0.05%～10% of the gross mass of the base oil of refrigerator oil, and 0.05%～10% is mass percent;

Molecular formula e;

Wherein, R6 is a groups with 8～16 carbon atoms.

Described compressor consists of refrigeration system together with indoor heat converter, outdoor heat converter, throttling arrangement.

Be added with more than one in antioxidant, sour agent for capturing, defoamer and extruding antiwear additive in refrigerator oil of the present invention, add the high-temperature stability that antioxidant can increase refrigerator oil, be not easy deteriorated; Add sour agent for capturing and can prevent the oil product acidifying, prevent copper facing; Add defoamer and can prevent the foaming of oil product in the refrigerant environment, improve the greasy property of oil product; The interpolation antiwear additive can reduce the wearing and tearing between the component of doing relative movement in compressor, increases compressor reliability.

Refrigerator oil in the present invention and hydrocarbon coolant solubility are lower, in the situation that the reliability of the performance of less refrigerant enclosed volume system and compressor is all more stable.

Description of drawings

Fig. 1 is one embodiment of the invention structural representation.

In figure: 1 is housing, and 2 is stator, and 3 is rotor, and 4 is running shaft, and 5 is compressing mechanism, and 6 is refrigerator oil.

Embodiment

The invention will be further described below in conjunction with drawings and Examples.

Referring to Fig. 1, this compressor has been taken in motor in closed shell 1, that be connected by running shaft 4 with this motor, have a compressing mechanism 5 that refrigeration agent is compressed, and refrigerator oil 6, refrigeration agent is hydrocarbon refrigerant, the base oil of refrigerator oil adopts the polyalkane glycol ethers.Refrigerator oil 6 is positioned at the bottom of housing 1.

Described base oil satisfies the requirement of general formula a,

General formula a;

\frac{n}{m} \leq \frac{2}{3}

Formula b.

Molecular formula c;

Molecular formula d;

Molecular formula e;

Wherein, R6 is a groups with 8～16 carbon atoms.

Embodiment one

Take the R290 refrigeration agent as example, in the base oil preparation process of refrigerator oil, namely in the preparation process of polyalkane glycol ethers, adjustment ring oxidative ethane CH ₂CHO and propylene oxide CH ₂CH ₂The molar ratio of O is 2/3, and the solubility that obtains refrigerator oil and R290 refrigeration agent is as shown in table 1.Under normal temperature, 0.7MPa, R290 refrigeration agent and refrigerator oil are substantially immiscible.

Embodiment two

Take the R290 refrigeration agent as example, in the base oil preparation process of refrigerator oil, namely in the preparation process of polyalkane glycol ethers, do not add ethylene oxide, obtain refrigerator oil and R290 refrigeration agent solubility is as shown in table 1.When not containing ethylene oxide in oil, under normal temperature, 0.7MPa, the solubility of R290 refrigeration agent and refrigerator oil is 28%.

Can find that from table 1 along with the increase of propylene oxide content, the minimizing of ethylene oxide, the solubility of refrigerator oil and R290 refrigeration agent mixes from immiscible becoming.

Table 1

Claims

1. compressor, taken in motor in closed shell (1), be connected by running shaft (4) with this motor, have a compressing mechanism (5) that refrigeration agent is compressed, and refrigerator oil (6), it is characterized in that refrigeration agent is hydrocarbon refrigerant, the base oil of refrigerator oil adopts the polyalkane glycol ethers.

2. compressor according to claim 1, is characterized in that described base oil satisfies the requirement of general formula a,

General formula a;

\frac{n}{m} \leq \frac{2}{3}

Formula b.

3. compressor according to claim 1, is characterized in that described refrigerating machine oil viscosity is 10～100mm in the time of 40 ℃ ²/ s.

4. compressor according to claim 1 is characterized in that being added with in described refrigerator oil more than one in antioxidant, sour agent for capturing, defoamer and extruding antiwear additive.

5. compressor according to claim 4, it is characterized in that described extruding antiwear additive selects one at least from the group that the alkyl polyoxyalkylene phosphate ester of molecular formula c or molecular formula d representative forms, this extruding antiwear additive is joined in the base oil of refrigerator oil by 0.05%～10% of the gross mass of the base oil of refrigerator oil, and 0.05%～10% is mass percent;

Molecular formula c;

Molecular formula d;

6. compressor according to claim 4, it is characterized in that described extruding antiwear additive is a kind of dialkyl phosphate take molecular formula e as representative, this extruding antiwear additive is joined in the base oil of refrigerator oil by 0.05%～10% of the gross mass of the base oil of refrigerator oil, and 0.05%～10% is mass percent;

Molecular formula e;

Wherein, R6 is a groups with 8～16 carbon atoms.

7. compressor according to claim 1, is characterized in that described compressor consists of refrigeration system together with indoor heat converter, outdoor heat converter, throttling arrangement.