JP2000046422A - Enclosed motor compressor and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an enclosed motor compressor having an enclosed container containing a motor element in which long term reliability is ensured without causing deterioration of performance due to deposition of oligomer by subjecting the motor elements to treatment of varnish principally comprising syndiotactic polystyrene. SOLUTION: After being compressed by an enclosed motor compressor 1 having an enclosed container 2 containing elements for compressing refrigerant and a motor element 3 for operating the compression element, refrigerant is passed through a condenser 13 and the flow rate thereof is restricted by a capillary tube 14 before the refrigerant is heat exchanged through an evaporator 15 and returned back to the enclosed motor compressor 1. The motor element 3 section of the enclosed motor compressor 1 employing refrigerant principally comprising hydrofluoro carbon and ester oil or ether oil as refrigerating machine oil is subjected to treatment of varnish principally comprising syndiotactic polystyrene. According to the arrangement, extraction of oligomer from a polyeaster based insulating film 12 to the refrigeration cycle is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic electric compressor and an air conditioner used for refrigeration and air conditioning.

[0002]

2. Description of the Related Art As shown in FIG. 1, a closed electric compressor 1 and an air conditioner are generally known as systems used for refrigeration and air conditioning. A compression element (not shown) for compressing the refrigerant and an electric element 3 for operating the compression element are provided in the closed container 2, and a mixed liquid 4 of the refrigerant and the refrigerating machine oil is stored at the bottom. . The compression element is connected to the electric element 3 by a drive shaft 5, and the electric element 3 is supplied with electricity from a power terminal 7 via a connection 6. The above electric element 3
Is constituted by a cylindrical stator 8 whose outer peripheral surface is supported by the closed casing 2 and a rotor 9 supported by the drive shaft 5 so as to keep a constant gap from the inner peripheral surface of the stator 8. The stator 8 includes a core 10 in which iron plates are laminated in a cylindrical shape, a magnet wire 11 that passes through slots formed in a large number in the cylindrical direction of the core 10, a gap between the core 10 and the magnet wire 11, and a magnetine wire. 11, an insulating film 12 between the phases and a core 10
Of the binding wire that binds the magnet wire 11 protruding from the end face of the wire. The flow rate of the refrigerant compressed by the hermetic electric compressor 1 is reduced by the capillary tube 14 via the condenser 13, heat exchange is performed by the evaporator 15, and the refrigerant returns to the hermetic electric compressor 1 again. .

[0003] As a refrigerant for the hermetic electric compressor 1, dichlorodifluoromethane (hereinafter referred to as CFC12) and monochlorodifluoromethane (hereinafter referred to as HCFC22) have been mainly used. Due to the destruction problem, alternative refrigerants have been studied, and 1,1,1,2-tetrafluoroethane (hereinafter referred to as HFC134a), 1,1,2-trifluoroethane (hereinafter referred to as HFC143a), difluoromethane (hereinafter referred to as HFC32). Pentafluoroethane (hereinafter HFC125)
), Hydrocarbons (hereinafter referred to as HC), and mixed refrigerants thereof are being put to practical use.

[0004]

In the structure of the electric element 3, the connecting portion 6, the insulating film 12, the binding yarn, etc. of the stator 8 are made of an organic material mainly composed of thermoplastic polyester. The thermoplastic polyester is, for example, polyethylene terephthalate (hereinafter referred to as PET), polybutylene terephthalate (hereinafter referred to as PBT), polyethylene naphthalate (hereinafter referred to as PEN) and the like. Films, molded products, and fibers are widely used as components of electric elements for hermetic electric compressors because of their excellent refrigerant resistance, good workability, and ease of supply. .

[0005] However, in the production process of the thermoplastic polyester, low molecular substances called oligomers remain in the production process,
It is contained in finished parts at a certain rate. This oligomer has a different chemical structure depending on PET, PBT and PEN, but is a highly crystalline white solid centered on a trimer to pentamer. An organic material containing thermoplastic oligomer as a main component containing this oligomer is used in a hermetic electric compressor, and when exposed to a refrigerant or refrigeration oil in a refrigeration system, the contained oligomer is hermetically sealed. It precipitates in the compressor and the refrigeration system. The precipitated oligomer circulates in the hermetic electric compressor and the refrigeration system with the circulation of the refrigerant and the refrigerating machine oil, and is sucked into the capillary tube 14 where the circulating flow rate is narrowed or the hermetic electric compressor 1 that has a low temperature and low pressure. There is a problem that it is deposited on a portion or the like and causes a decrease in refrigeration capacity and a problem of a compression element.

[0006] In order to solve the above-mentioned problems, the present invention uses a material mainly composed of syndiotactic polystyrene with low oligomer extraction as an insulating film or a varnish, so that the inside of a hermetic electric compressor and the refrigeration by the accumulation of oligomers can be obtained. It is an object of the present invention to provide a hermetic electric compressor and an air conditioner that realize long-term reliability without causing a performance defect in the system.

[0007]

According to a first aspect of the present invention, there is provided a hermetic electric compressor having an electric element comprising a stator and a rotor in a hermetic container. The electric element of the machine is characterized by being subjected to a varnish treatment mainly composed of syndiotactic polystyrene. The air conditioner of the present invention according to claim 2 is a hermetic electric compressor using a refrigerant mainly composed of hydrofluorocarbon and an ester oil or an ether oil as a refrigerating machine oil, wherein an electric element portion of the hermetic electric compressor is It is characterized by being formed by varnish treatment mainly comprising syndiotactic polystyrene. Claim 3
The air conditioner according to the present invention is a sealed electric compressor using a refrigerant mainly composed of hydrocarbons and refrigeration oil of carbonate oil, wherein an electric element part of the sealed electric compressor mainly comprises syndiotactic polystyrene. It is characterized by a varnish treatment. Claim 4
The air conditioner according to the present invention is a hermetic electric compressor using a refrigerant mainly composed of hydrofluorocarbon and an ester oil or an ether oil as a refrigerating machine oil, wherein the insulating film of the hermetic electric compressor has a syndiotactic polystyrene. It is characterized by being composed mainly of. An air conditioner according to a fifth aspect of the present invention is the hermetic electric compressor using a refrigerant mainly composed of hydrocarbons and a refrigerating machine oil containing carbonate oil, wherein the insulating film of the hermetic electric compressor has a syndiotactic polystyrene. It is characterized by being composed mainly of. The hermetic electric compressor or the air conditioner according to the present invention is characterized in that the number average molecular weight of syndiotactic polystyrene is 3 × 10 ⁴ or more.
The closed electric compressor or the air conditioner according to the present invention is characterized in that the weight average molecular weight / number average molecular weight of syndiotactic polystyrene is 3 or less.
The hermetic electric compressor or the air conditioner according to the present invention is characterized in that syndiotactic polystyrene contains 5 wt% or less of an inorganic additive. According to a ninth aspect of the present invention, the hermetic electric compressor or the air conditioner is characterized in that after syndiotactic polystyrene is formed into an amorphous film, the film is stretched.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hermetic electric compressor having an electric element including a stator and a rotor in a hermetically sealed container according to an embodiment of the present invention; It is constituted by varnish treatment mainly composed of polystyrene. Even when a conventional polyester-based insulating film is used, varnish treatment mainly using syndiotactic polystyrene can reduce oligomer extraction from the polyester-based insulating film into a refrigeration cycle. Therefore, it does not accumulate on the inside of the capillary tube or on the suction portion of the hermetic electric compressor that becomes low in temperature and pressure, and does not cause a decrease in refrigeration capacity or a malfunction of the compression element.

According to a second aspect of the present invention, in a hermetic electric compressor using a refrigerant mainly composed of hydrofluorocarbon and an ester oil or an ether oil as a refrigerating machine oil, an electric element portion of the hermetic electric compressor is a syndiotactic type. A varnish treatment mainly composed of tic polystyrene. Even when a conventional polyester-based insulating film is used, varnish treatment mainly using syndiotactic polystyrene can reduce oligomer extraction from the polyester-based insulating film into a refrigeration cycle. In addition, when ester oil or ether oil is used in consideration of compatibility with hydrofluorocarbon, there is a concern about refrigerating machine oil's hygroscopicity. A significant drop in However, in the present invention, since the varnish layer of syndiotactic polystyrene has durability against the attack of moisture, long-term reliability as a refrigeration cycle can be guaranteed. The invention according to claim 3 is a hermetic electric compressor using a refrigerant mainly composed of hydrocarbons and a refrigerating machine oil containing carbonate oil,
The electric element portion of the hermetic electric compressor is configured by performing a varnish treatment mainly using syndiotactic polystyrene. Even when a conventional polyester-based insulating film is used, varnish treatment mainly using syndiotactic polystyrene can reduce oligomer extraction from the polyester-based insulating film into a refrigeration cycle. Also, when carbonate oil is used for the purpose of incompatibility with hydrocarbons, there is a concern about the hygroscopicity of the refrigerating machine oil, and in a conventional polyester film, the physical properties are remarkable due to the attack of the absorbed moisture. A drop has occurred. However, in the present invention, since the varnish layer of syndiotactic polystyrene has durability against the attack of moisture, long-term reliability as a refrigeration cycle can be guaranteed. According to a fourth aspect of the present invention, there is provided a hermetic electric compressor having an electric element including a stator and a rotor in a hermetically sealed container, wherein the insulating film of the hermetic electric compressor is mainly composed of syndiotactic polystyrene. Is done. As a result, the amount of moisture brought into the refrigeration cycle by the insulating film constituting the electric element part is reduced, and the oligomer extraction into the refrigeration cycle is reduced. Therefore, it accumulates on the inside of the capillary tube and on the suction part of the hermetic electric compressor that becomes low temperature and low pressure,
The refrigeration capacity does not decrease and the compression element does not malfunction. According to a second aspect of the present invention, in the hermetic electric compressor using a refrigerant mainly composed of hydrofluorocarbon and an ester oil or an ether oil as a refrigerating machine oil, the insulating film of the hermetic electric compressor is mainly composed of syndiotactic polystyrene. It is composed of When the ester oil or the ether oil is used in consideration of the compatibility with the hydrofluorocarbon, there is a concern about the hygroscopicity of the refrigerating machine oil. In a conventional polyester film, the physical properties such as tensile strength are significantly reduced due to the attack of the absorbed moisture. However, according to the present invention, syndiotactic polystyrene is hardly affected greatly by physical properties with respect to the attack of moisture, and has sufficient chemical stability against an increase in the acid value due to decomposition of oil. Therefore, long-term reliability as a refrigeration cycle can be guaranteed. The invention according to claim 5 is a hermetic electric compressor using a refrigerant mainly composed of hydrocarbons and a refrigerating machine oil containing carbonate oil,
The insulating film of the hermetic electric compressor is composed of a material mainly composed of syndiotactic polystyrene. When the carbonate oil is used for the purpose of incompatibility with the hydrocarbon, there is concern about the hygroscopicity of the refrigerating machine oil. In a conventional polyester film, the physical properties were remarkably reduced due to the attack of the absorbed moisture. However, according to the present invention, syndiotactic polystyrene is hardly affected greatly by physical properties with respect to the attack of moisture, and has sufficient chemical stability against an increase in the acid value due to decomposition of oil. Therefore, long-term reliability as a refrigeration cycle can be guaranteed. In the invention according to claim 6, the number average molecular weight of the syndiotactic polystyrene used for the insulating film or varnish treatment is 3 × 1.
Is 0 ⁴ or more. As a result, the molecular structure of syndiotactic polystyrene itself can be controlled and low molecular weight components can be eliminated.
The refrigeration capacity does not decrease and the compression element does not malfunction. In the invention according to claim 7, the weight average molecular weight / number average molecular weight of the syndiotactic polystyrene used for the insulating film or varnish treatment is 3 or less. As a result, the molecular composition and molecular weight distribution of syndiotactic polystyrene itself can be controlled more precisely to remove low molecular weight components. In addition, a decrease in the refrigerating capacity and a failure of the compression element do not occur. In the invention according to claim 8, the syndiotactic polystyrene used for the insulating film or varnish treatment contains 5 wt% or less of an inorganic additive.
As a result, the film made of syndiotactic polystyrene can be made opaque, and quality control of the electric element portion during mass production becomes easy. According to a ninth aspect of the present invention, after the syndiotactic polystyrene used for the insulating film is formed into an amorphous film, the film is subjected to a stretching process. Thereby, excellent crystallinity is imparted and physical properties such as tensile strength are improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. (Embodiment 1) Since a hermetic electric compressor and an air conditioner of this embodiment are the same as those of the conventional example, reference is made to FIG.
In this embodiment, a biaxially stretched syndiotactic polystyrene (number-average molecular weight of 5) was used as an insulating film of a hermetic electric compressor using HCFC22 refrigerant and mineral oil-based refrigerating machine oil (containing 1 wt% of a phosphorus-based extreme pressure additive). × 10 ⁴ , weight average molecular weight / number average molecular weight = 2) was used. Further, to confirm long-term reliability, a heating operation test for 5000 hours was performed by intentionally adding 700 mg of water. (Embodiment 2) In this embodiment, a mixed refrigerant (R410A) of HFC32 and HFC125 and an ester-based refrigerating machine oil (hindered ester) are used, and a biaxially stretched syndiotactic polystyrene is used as an insulating film of a hermetic electric compressor. (Number average molecular weight 5 × 10 ⁴ , weight average molecular weight / number average molecular weight = 2) was used. In addition, 700 mg of water was intentionally added to confirm long-term reliability, and 5000 mg of water was added.
A time heating operation test was performed. (Embodiment 3) In this embodiment, a mixed refrigerant (R410A) of HFC32 and HFC125 and an ether-based refrigerating machine oil (containing 1 wt% of a phosphorus-based extreme pressure additive) are used, and biaxial stretching is performed as an insulating film of a hermetic electric compressor. Syndiotactic polystyrene (number average molecular weight 5 × 10 ⁴ , weight average molecular weight / number average molecular weight = 2) was used. Further, to confirm long-term reliability, a heating operation test for 5000 hours was performed by intentionally adding 700 mg of water. Example 4 In this example, a biaxially stretched syndiotactic polystyrene (number-average molecular weight 5 × 10 ⁴ , weight-average molecular weight) was used as an insulating film of a hermetic electric compressor using propane refrigerant and carbonate-based refrigerating machine oil. / Number average molecular weight = 2) was used. Further, to confirm long-term reliability, a heating operation test for 5000 hours was performed by intentionally adding 700 mg of water. (Comparative Example 1) In this comparative example, HCFC22 refrigerant and mineral oil-based refrigerating machine oil (containing 1 wt% of a phosphorus-based extreme pressure additive) were used.
PET was used as an insulating film of the hermetic electric compressor. In addition, to confirm long-term reliability, water 7
A heating operation test for 5000 hours was performed by adding 00 mg. (Comparative Example 2) In this comparative example, HCFC22 refrigerant and mineral oil-based refrigerating machine oil (containing 1 wt% of a phosphorus-based extreme pressure additive) were used.
PEN was used as the insulating film of the hermetic electric compressor. In addition, to confirm long-term reliability, water 7
A heating operation test for 5000 hours was performed by adding 00 mg. (Embodiment 5) In this embodiment, HCFC22 refrigerant and mineral oil-based refrigerating machine oil (containing 1 wt% of phosphorus-based extreme pressure additive) are used, and PET is used as an insulating film of a hermetic electric compressor.
Syndiotactic polystyrene powder (number average molecular weight 5
× 10 ⁴ , weight average molecular weight / number average molecular weight = 1.5). In addition, 700 mg of water was intentionally added to confirm long-term reliability,
A 00 hour heating operation test was performed. (Embodiment 6) In this embodiment, a mixed refrigerant of HFC32 and HFC125 (R410A) and an ester-based refrigerating machine oil (hindered ester) are used, and PET is used as an insulating film of a hermetic electric compressor. A varnish treatment was performed mainly on powder (number average molecular weight 5 × 10 ⁴ , weight average molecular weight / number average molecular weight = 1.5). Further, to confirm long-term reliability, a heating operation test for 5000 hours was performed by intentionally adding 700 mg of water. (Embodiment 7) In this embodiment, a refrigerant mixture of HFC32 and HFC125 (R410A) and an ether-based refrigerating machine oil (containing 1 wt% of a phosphorus-based extreme pressure additive) are used, and PET is used as an insulating film of a hermetic electric compressor. Then, a varnish treatment was carried out mainly using syndiotactic polystyrene powder (number average molecular weight 5 × 10 ⁴ , weight average molecular weight / number average molecular weight = 1.5). Further, to confirm long-term reliability, a heating operation test for 5000 hours was performed by intentionally adding 700 mg of water. Example 8 In this example, a propane refrigerant and a carbonate-based refrigerating machine oil were used, PET was used as an insulating film of a hermetic electric compressor, and syndiotactic polystyrene powder (number average molecular weight 5 × 10 ⁴ , weight average) A varnish treatment mainly composed of (molecular weight / number average molecular weight = 1.5) was performed. Also, in order to confirm long-term reliability, water 70
A heating operation test for 5000 hours was performed by adding 0 mg. Table 1 shows the results of Examples 1 to 8 and Comparative Example 1.

[0011]

[Table 1]

As is clear from the above results, the syndiotactic polystyrene film has chemical stability even when the total acid value of the oil increases, and the film has a small hygroscopicity, so that the tensile strength decreases even after the durability test. It was small. Capy deposits also appeared, but these did not originate from the film, but were polymers of oil. Comparative Example 1,
The capy deposit of No. 2 was a polymer of oil, a chemical bond of an oil and a film-derived material, an oligomer of a film, and the like, and the film-derived material accounted for almost 70%. Therefore, the amount of capy deposits could be reduced by making the insulating film used as a material constituting the compressor electric element chemically superior.

In the present invention, syndiotactic polystyrene is used, which is a material having a stereoregularity among polystyrene resins and exhibiting heat resistance, chemical resistance and low dielectric constant. An atactic structure has low heat resistance and is not practical. In addition, although those having an isotactic structure have a high melting point, crystallization is extremely slow and only a fragile film can be obtained. Therefore, syndiotactic polystyrene which can be used in the present invention among polystyrenes had a syndiotactic ratio of 95% or more. More preferably, it was 97% or more. The syndiotactic ratio is determined by a nuclear magnetic resonance method (NMR method). In the present invention, the insulating film is mainly composed of syndiotactic polystyrene, and may be a multi-layer type in which PET is used for the inner layer and syndiotactic polystyrene is used for the outer layer. Table 2 shows the physical property evaluation results of PET, PEN, and syndiotactic polystyrene.

[0014]

[Table 2]

Since the syndiotactic polystyrene used in the present invention has a low dielectric constant, it has been found that the syndiotactic polystyrene is also effective in reducing the leakage current of the compressor. Leakage current of ester oil, ether oil and carbonate oil tended to increase in the order described above as compared with mineral oil. In the above Examples 1 to 4, after casting the syndiotactic polystyrene film, the film was biaxially stretched about 3.5 times at 150 ° C. Syndiotactic polystyrene was able to promote crystallization when stretched and at the same time to obtain excellent physical properties such as excellent tensile strength. In the production, a film was obtained by intentionally containing a low-molecular-weight organic compound, stretching the film, and removing the low-molecular-weight organic compound with a solvent. However, the syndiotactic polystyrene film that can be used in the present invention may be one that has been cast and then crystallized without stretching, or may be uniaxially stretched. However, the most excellent physical properties were obtained by biaxial stretching. The reason why a sufficient mechanical strength is required for the film is that the film must be rigid enough to prevent it from being bent when automatically inserting the film into the groove in the core on which the stator is laminated. Therefore, although the tensile strength is quoted as a relative scale, a film having a small mechanical strength needs to be thick. Since the uniaxially stretched film has directionality, there is no problem if it is used in consideration of the film insertion direction. Table 3 shows the results of the tensile strength according to the type of the stretching treatment.

[0016]

[Table 3]

In the above examples, substantially transparent syndiotactic polystyrene films and syndiotactic polystyrene varnishes were used. However, in order to grasp the state where the film is automatically inserted into the stator during mass production, it is preferable that the film is made white and opaque to some extent. Further, in order to control the quality after the varnish treatment, it is preferable that the varnish is made white and opaque to some extent.
Therefore, an inorganic powder as a coloring agent, for example, titania,
Add 5 wt% or less of silica, alumina and the like. More preferably, sufficient coloring can be achieved by adding 3 wt% or less of inorganic powder having a particle size of 1 μm or less. The unstretched syndiotactic polystyrene film does not need to be colored because it is whitened. Syndiotactic polystyrene varnish can also be whitened by adjusting the processing conditions, in which case there is no need to color.
The syndiotactic polystyrene used in the present invention is a resin in which the raw monomer is precisely controlled in the three-dimensional structure of the molecular chain by a metallocene catalyst, and has a higher molecular weight than conventional polyesters and a small amount of oligomer components extracted by a refrigerant. It is. However, by defining the number average molecular weight to be 3 × 10 ⁴ or more, more preferably 5 × 10 ⁴ or more, it is possible to further remove low molecular weight components and prevent problems such as blockage of the capillary tube in the refrigeration cycle. can do. In addition, the molecular weight distribution is not defined only by the number average molecular weight, but by defining the weight average molecular weight / number average molecular weight = 3 or less, more preferably 2.5 or less, a portion having a large molecular weight is also defined. High polystyrene molecular weight control becomes possible.

The varnish used in Examples 5 to 8 was mixed with 80 parts of syndiotactic polystyrene powder, 20 parts of an epoxy resin component, adjusted to a predetermined viscosity with a solvent, and then heated and dried at about 190 ° C. for curing. The film was sufficiently formed. 70% of syndiotactic polystyrene powder required for the present invention
Above this, below this, a compound having both desirable chemical stability and low hygroscopicity could not be obtained. The temperature required for heat curing was 150 to 250 ° C.
More preferably, it was 180 to 220 ° C.

[0019]

As is apparent from the above embodiment, according to the first aspect of the present invention, a refrigeration cycle can be performed from a polyester film by varnishing a syndiotactic polystyrene even in an electric element portion in which conventional polyester is used. The extraction of oligomers into water was reduced, and long-term reliability as a refrigeration cycle was guaranteed. According to the second aspect of the present invention, varnish treatment with syndiotactic polystyrene is also used in an air conditioner having an electric element portion using polyester as a refrigerating machine oil or ester oil or ether oil having high hygroscopicity. By doing so, oligomer extraction from the polyester film into the refrigeration cycle was reduced, and long-term reliability of the refrigeration cycle could be guaranteed. According to the third aspect of the present invention, a carbonate oil having high hygroscopicity is used as a refrigerating machine oil, and even in an air conditioner having an electric element portion using a conventional polyester, a varnish treatment with syndiotactic polystyrene is performed. The extraction of oligomers from the polyester film into the refrigeration cycle was reduced, and long-term reliability as a refrigeration cycle was guaranteed. According to the fourth aspect of the present invention, the syndiotactic polystyrene having low oligomer extractability is used for the insulating film, so that it is deposited on the inside of the capillary tube or on the suction portion of the hermetic electric compressor that is low in temperature and pressure. In addition, the reduction of the refrigerating capacity and the failure of the compression element are not caused. Also, in an air conditioner using ester oil or ether oil having high hygroscopicity as a refrigerating machine oil, the use of syndiotactic polystyrene hardly affects the physical attack on water attack. Long-term reliability as a cycle could be guaranteed. According to the fifth aspect of the present invention, even in an air conditioner using a carbonate oil having a high hygroscopic property as a refrigerating machine oil, the use of syndiotactic polystyrene substantially increases physical properties against an attack of moisture. Since it is not affected,
Long-term reliability as a refrigeration cycle could be guaranteed. According to the invention of claims 6 and 7, by optimizing the molecular weight distribution of the syndiotactic polystyrene used for the treatment of the insulating film or the varnish, low molecular weight components can be eliminated, and a problem in the capillary tube occurs. No more. According to the eighth aspect of the present invention, the syndiotactic polystyrene used for the insulating film or varnish treatment can be made opaque by containing an inorganic additive, and the quality control of the electric element portion during mass production is easy. It became. According to the ninth aspect of the present invention, after syndiotactic polystyrene used for the insulating film is formed into an amorphous film, the film is subjected to a stretching process to impart excellent crystallinity and pull. Improvement of physical properties such as strength was achieved.

[Brief description of the drawings]

FIG. 1 is a cycle configuration diagram of a hermetic electric compressor and an air conditioner shown in one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hermetic electric compressor 2 Hermetic container 3 Electric element 4 Mixed liquid 5 Drive shaft 6 Connection part 7 Power terminal 8 Stator 9 Rotor 10 Core 11 Magnet wire 12 Insulating film 13 Condenser 14 Capillary tube 15 Evaporator

Claims (9)

[Claims] 1. A hermetic electric compressor having an electric element comprising a stator and a rotor in a closed container, wherein the electric element portion of the hermetic electric compressor is subjected to a varnish treatment mainly composed of syndiotactic polystyrene. Hermetic electric compressor characterized by comprising 2. A hermetic electric compressor using a refrigerant mainly composed of hydrofluorocarbon and an ester oil or an ether oil as a refrigerating machine oil, wherein an electric element portion of the hermetic electric compressor mainly comprises a syndiotactic polystyrene. Air conditioner characterized by being configured by varnish treatment 3. A refrigerant mainly composed of hydrocarbon,
In a hermetic electric compressor using carbonate oil as refrigerating machine oil, an air conditioner characterized in that an electric element portion of the hermetic electric compressor is configured by varnish processing mainly using syndiotactic polystyrene. 4. A hermetic electric compressor using a refrigerant mainly composed of hydrofluorocarbon and an ester oil or an ether oil as a refrigerating machine oil, wherein the insulating film of the hermetic electric compressor is mainly composed of syndiotactic polystyrene. Air conditioner characterized by being composed of 5. A refrigerant mainly composed of hydrocarbon,
In a hermetic electric compressor using carbonate oil as a refrigerating machine oil, an air conditioner characterized in that an insulating film of the hermetic electric compressor is composed mainly of syndiotactic polystyrene. 6. The hermetic electric compressor or air conditioner according to claim 1, wherein the number average molecular weight of the syndiotactic polystyrene is 3 × 10 ⁴ or more. 7. The hermetic electric compressor or air conditioner according to claim 6, wherein the weight average molecular weight / number average molecular weight of syndiotactic polystyrene is 3 or less. 8. The hermetic electric compressor or air conditioner according to claim 1, wherein the syndiotactic polystyrene contains 5 wt% or less of an inorganic additive. 9. The hermetic electric compressor or air conditioner according to claim 4, wherein after syndiotactic polystyrene is formed into an amorphous film, the film is stretched.