CN109072896B - Hermetic compressor and refrigeration cycle device - Google Patents
Hermetic compressor and refrigeration cycle device Download PDFInfo
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- CN109072896B CN109072896B CN201780026024.6A CN201780026024A CN109072896B CN 109072896 B CN109072896 B CN 109072896B CN 201780026024 A CN201780026024 A CN 201780026024A CN 109072896 B CN109072896 B CN 109072896B
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- hermetic
- hermetic compressor
- refrigerant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
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- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Provided are a sealed compressor having a covering member for lead wires or a collection member for lead wires, which is suitable for use in an environment exposed to a refrigerant and a lubricating oil and has a high tensile strength, and a refrigeration cycle device provided with the sealed compressor. A hermetic compressor (2) is provided with: a plurality of lead wires (28) led out from the motor (16), and a collecting component (29) for bundling the plurality of lead wires (28). The collecting member (29) is a multilayer tube body (53) in which 3 or more layers of a tube (52) formed by winding an insulating film (51) in a spiral shape are stacked, the outermost layer of the multilayer tube body (53) has an overlapping portion (56) of the insulating films (51), and at least 1 layer of the intermediate layer of the multilayer tube body (53) is made of aramid paper.
Description
Technical Field
Embodiments according to the present invention relate to a hermetic compressor and a refrigeration cycle device.
Background
A motor including a lead wire for connecting a stator winding to a sealed terminal for power supply and an insulating tube surrounding the lead wire is known.
The insulating tube has a 1-layer structure or a multilayer structure of 2 or more layers in which a film is spirally wound.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 10-134661
Disclosure of Invention
Problems to be solved by the invention
A hermetic compressor used in a refrigeration cycle device includes a motor and a compression mechanism housed in a hermetic case. Lubricating oil for lubricating the compression mechanism is sealed in the sealed case.
The hermetic compressor sucks a refrigerant into a compression mechanism, compresses the sucked refrigerant by the compression mechanism, discharges the high-temperature and high-pressure refrigerant from the compression mechanism into a hermetic case, and sends the high-temperature and high-pressure refrigerant discharged into the hermetic case to a radiator of a refrigeration cycle apparatus.
The hermetic compressor further includes a hermetic terminal for power supply provided in the hermetic case. The lead wire of the motor is disposed in the sealed case and connected to the sealed terminal. There are typically multiple outlets. Therefore, the plurality of lead-out wires are collated together by the tubular or ribbon-shaped collective member. As a result, the lead wires can be prevented from contacting the sealed case or the like.
However, the lead wire of the motor of the hermetic compressor is exposed to an environment in which a high-temperature and high-pressure refrigerant or a lubricating oil heated by the high-temperature and high-pressure refrigerant exists in the hermetic case. Therefore, the cladding or the aggregate member of the lead wire is required to be suitable for an environment exposed to the refrigerant and the lubricating oil.
Further, the lead wires of the motor of the hermetic compressor and the assembly members thereof are required to have strength in view of workability and handling in the assembling work of the compressor.
However, the insulating tube of the conventional motor does not consider adaptability to an environment exposed to a refrigerant or a lubricating oil in a sealed housing. The insulating tube of the conventional motor is merely a member obtained by winding a film in a spiral shape. Therefore, in the conventional motor, when the insulating tube is pulled (elongated) in the longitudinal direction, the spiral is unwound. That is, the insulating tube of the conventional motor does not have sufficient tensile strength.
Accordingly, the present invention provides a hermetic compressor including a covering member for a lead wire or a collective member for a lead wire having a high tensile strength, which is suitable for use in an environment exposed to a refrigerant and a lubricating oil, and a refrigeration cycle device.
Means for solving the problems
In order to solve the above-described problems, a sealed compressor according to an embodiment of the present invention is a sealed compressor for compressing a single refrigerant of R32, i.e., difluoromethane, or a mixed refrigerant containing more than 20 mass% of R32, and using a lubricating oil containing an ester-based synthetic oil to which an epoxy group-containing compound and a phenol-based antioxidant are added, the sealed compressor including: sealing the shell; a compression mechanism disposed in the sealed casing and capable of compressing the single refrigerant or the mixed refrigerant; a motor for driving the compression mechanism; a hermetic terminal provided in the hermetic case; a plurality of lead wires which are led out from the motor and connected to the hermetic terminal; and a collecting member that bundles the plurality of lead wires, wherein the collecting member is a multilayer pipe body in which a pipe formed by winding an insulating film in a spiral shape is stacked by 3 or more layers, an outermost layer of the multilayer pipe body has a stacked portion of the insulating films, and at least 1 layer of an intermediate layer of the multilayer pipe body is made of aramid paper.
A hermetic compressor according to an embodiment of the present invention is a hermetic compressor for compressing a single refrigerant of difluoromethane R32 or a mixed refrigerant containing more than 20 mass% of R32, the hermetic compressor using a lubricating oil containing an ester-based synthetic oil to which an epoxy group-containing compound and a phenol-based antioxidant are added, the hermetic compressor including: sealing the shell; a compression mechanism disposed in the sealed casing and capable of compressing the single refrigerant or the mixed refrigerant; a motor for driving the compression mechanism; a hermetic terminal provided in the hermetic case; and a plurality of lead wires which are led out from the motor and connected to the seal terminals, wherein the lead wire is a multilayer tube body in which a tube formed by winding an insulating film in a spiral shape is stacked by 3 or more layers, the outermost layer of the multilayer tube body has a stacked portion of the insulating films, and at least 1 layer of the intermediate layer of the multilayer tube body is made of aramid paper.
A hermetic compressor according to an embodiment of the present invention is a hermetic compressor for compressing a single refrigerant of R32, i.e., difluoromethane, or a mixed refrigerant containing more than 20 mass% of R32, the hermetic compressor using a lubricating oil containing an ester-based synthetic oil to which an epoxy group-containing compound and a phenol-based antioxidant are added, the hermetic compressor including: sealing the shell; a compression mechanism disposed in the sealed casing and capable of compressing the single refrigerant or the mixed refrigerant; a motor for driving the compression mechanism; a hermetic terminal provided in the hermetic case; a plurality of lead wires which are led out from the motor and connected to the hermetic terminal; and a collecting member for binding the plurality of lead wires, wherein the lead wire covering member and the collecting member are a multilayer tube body in which a tube formed by winding an insulating film in a spiral shape is stacked by 3 or more layers, an outermost layer of the multilayer tube body has a stacked portion of the insulating films, and at least 1 layer of an intermediate layer of the multilayer tube body is made of aramid paper.
Preferably, the material of the insulating film other than the 1 layer made of aramid paper of the multilayer pipe body of the hermetic compressor according to the embodiment of the present invention is at least one of polyethylene terephthalate, polyethylene naphthalate, polyimide, polyphenylene sulfide, and aramid paper.
Preferably, the multilayer pipe body of the hermetic compressor according to the embodiment of the present invention has an outermost pipe and an innermost pipe, and the material of the multilayer pipe body has a 3-layer structure of the polyethylene naphthalate.
Preferably, the multilayer pipe body of the hermetic compressor according to the embodiment of the present invention has an adhesive layer of a urethane adhesive for bonding adjacent pipes.
A refrigeration cycle apparatus according to an embodiment of the present invention includes: the above-described hermetic compressor; a heat sink; an expansion device; a heat sink; and a refrigerant pipe for connecting the hermetic compressor, the radiator, the expansion device, and the heat absorber and allowing a refrigerant to flow therethrough.
Drawings
Fig. 1 is a schematic diagram of a refrigeration cycle apparatus according to an embodiment of the present invention.
Fig. 2 is a perspective view of the collecting member of the hermetic compressor according to the present embodiment.
Fig. 3 is a schematic longitudinal sectional view of an assembly member of the hermetic compressor according to the present embodiment.
Detailed Description
Embodiments of a hermetic compressor and a refrigeration cycle device according to the present invention will be described with reference to fig. 1 to 3.
Fig. 1 is a schematic diagram of a refrigeration cycle apparatus according to an embodiment of the present invention.
As shown in fig. 1, the refrigeration cycle apparatus 1 according to the present embodiment includes a hermetic compressor 2, a radiator 3, an expansion device 5, a heat absorber 6, an accumulator 7, and a refrigerant pipe 8. The refrigerant pipe 8 connects the hermetic compressor 2, the radiator 3, the expansion device 5, the heat absorber 6, and the accumulator 7 in this order to circulate the refrigerant.
The refrigerant circulating in the refrigeration cycle apparatus 1 is a single refrigerant of R32 (difluoromethane) or a mixed refrigerant containing R32 in an amount larger than 20 mass%.
The hermetic compressor 2 sucks and compresses the refrigerant having passed through the heat absorber 6 through the refrigerant pipe 8, and discharges the high-temperature and high-pressure refrigerant to the radiator 3 through the refrigerant pipe 8.
The hermetic compressor 2 includes: a vertically arranged cylindrical sealed casing 15; a motor 16 disposed in the upper half of the sealed case 15; a compression mechanism 17 disposed in the lower half inside the hermetic case 15; a rotary shaft 18 for transmitting the rotational driving force of the motor 16 to the compression mechanism 17; a main bearing 21 for rotatably supporting the rotary shaft 18; and a sub-bearing 22 that supports the rotary shaft 18 rotatably in cooperation with the main bearing 21.
The sealed case 15 includes: a cylindrical main body portion extending in the vertical direction; and hemispherical or elliptical end plates for closing the upper and lower ends of the main body.
A discharge pipe 8a for discharging the refrigerant is connected to an upper end plate of the sealed case 15. The discharge pipe 8a is connected to the refrigerant pipe 8. A sealed terminal 23 for power supply is provided at an end plate of the sealed case 15.
The motor 16 generates a driving force for driving the compression mechanism 17 to rotate. The electric motor 16 is, for example, a DC brushless motor. The motor 16 includes: a stator 25 fixed to an inner wall of the hermetic case 15; a rotor 26 surrounded by the stator 25 and provided on the rotary shaft 18; and a plurality of lead-out wires 28 led out from the stator 25 and connected to the hermetic terminals 23.
The lead wire 28 is a wire for supplying electric power to the stator 25 through the sealed terminal 23, and is a so-called lead wire. The number of the lead wires 28 differs depending on the kind of the motor 16. In the hermetic compressor 2 according to the present embodiment, a plurality of lead wires 28 are arranged. Specifically, the plurality of lead lines 28 includes 3 lead lines 28a, 28b, and 28 c. The plurality of lead wires 28, i.e., the lead wires 28a, 28b, 28c, are bundled by the collecting member 29.
The rotation shaft 18 connects the motor 16 and the compression mechanism 17 to each other. The rotary shaft 18 transmits the driving force generated by the motor 16 to the compression mechanism 17.
The intermediate portion 18a of the rotary shaft 18 connects the motor 16 and the compression mechanism 17, and is rotatably supported by the main bearing 21. The lower end portion 18b of the rotating shaft 18 is rotatably supported by a sub-bearing 22. The main bearing 21 and the sub bearing 22 are also part of the compression mechanism 17, and sandwich the compression mechanism 17. The rotary shaft 18 penetrates the compression mechanism 17.
The rotary shaft 18 includes an eccentric portion 31 between an intermediate portion 18a supported by the main bearing 21 and a lower end portion 18b supported by the sub-bearing 22. The eccentric portion 31 is a disk or a cylinder having a center of gravity that does not coincide with the axis of the rotating shaft 18.
The compression mechanism 17 can compress the refrigerant. That is, the compression mechanism 17 can compress a single refrigerant or a mixed refrigerant. The motor 16 drives the rotary shaft 18 to rotate, and the compression mechanism 17 sucks and compresses a gaseous refrigerant from the refrigerant tube 8, and discharges the compressed refrigerant into the sealed casing 15.
The compression mechanism 17 includes: a cylinder block 33 having a circular cylinder chamber 32; and an annular rolling member 35 disposed in the cylinder chamber 32.
The cylinder block 33 is fixed to the hermetic case 15 at a plurality of locations by welding, for example, spot welding. The cylinder 33 supports the entire compression mechanism 17 in the hermetic case 15.
The cylinder chamber 32 is a space inside the cylinder block 33 and is closed by the main bearing 21 and the sub-bearing 22. The eccentric portion 31 of the rotary shaft 18 is disposed in the cylinder chamber 32.
The main bearing 21 is fixed to the cylinder block 33 by a fastening member 36 such as a bolt. The main bearing 21 is provided with: a discharge valve mechanism (not shown) for discharging the refrigerant compressed in the cylinder chamber 32; and a discharge muffler 37. The discharge muffler 37 has a discharge hole (not shown). The discharge muffler 37 covers the discharge valve mechanism. The discharge valve mechanism is connected to the cylinder chamber 32. The discharge valve mechanism opens when the pressure in the cylinder chamber 32 reaches a predetermined pressure value in accordance with the compression action of the compression mechanism 17, and discharges the compressed refrigerant into the discharge muffler 37.
The sub-bearing 22 is fixed to the cylinder block 33 by a fastening member 38 such as a bolt.
The roller 35 is housed in the cylinder chamber 32 in such a manner as to be fitted to the peripheral surface of the eccentric portion 31, and a part of the outer peripheral surface is in line contact with the inner peripheral surface of the cylinder chamber 32. The rolling element 35 eccentrically moves while a part of the outer peripheral surface is in line contact with the inner peripheral surface of the cylinder chamber 32 as the rotating shaft 18 rotates.
The contact between the rolling elements 35 and the cylinder 33 is not a direct contact but an indirect contact via an oil film (not shown) of the lubricating oil 41, but for the sake of convenience of description, the contact via the oil film is expressed as "contact". An oil film of the lubricating oil 41 is also interposed between the rolling elements 35 and the eccentric portion 31, between the rolling elements 35 and the main bearing 21, and between the rolling elements 35 and the sub-bearing 22.
The suction pipe 7a penetrates the hermetic case 15 and is connected to the cylinder chamber 32 of the cylinder block 33. The cylinder block 33 is provided with an intake hole (not shown) which is connected to the intake pipe 7a and reaches the cylinder chamber 32.
The compression mechanism 17 is housed in the sealed casing 15 and is disposed at a lower portion of the sealed casing 15. The lower portion of the hermetic case 15 is filled with the lubricating oil 41. Further, most of the compression mechanism 17 is immersed in the lubricant oil 41 in the hermetic case 15.
The lubricating oil 41 includes an ester-based synthetic oil to which glycidyl ester, which is an epoxy group-containing compound, and a phenol-based antioxidant are added.
The hermetic compressor 2 according to the present embodiment discharges a single refrigerant of R32 or a mixed refrigerant containing R32 in an amount larger than 20 mass% into the hermetic shell 15 while maintaining a high temperature and a high pressure. Therefore, sealed compressor 2 may promote the chemical reaction of lubricating oil 41 and accelerate the deterioration of lubricating oil 41. Therefore, the hermetic compressor 2 according to the present embodiment uses the lubricating oil 41 containing the ester-based synthetic oil to which the epoxy group-containing compound and the phenol-based antioxidant are added. This makes it possible to suppress an increase in acid value due to hydrolysis in the hermetic compressor 2, and to ensure chemical stability in the hermetic case 15.
The hermetic compressor 2 according to the present embodiment has chemical stability in the hermetic case 15, and therefore, inexpensive insulating films can be used as the material of the covering of the lead wire 28 and the collective member 29 exposed to the environment in the hermetic case 15.
From the viewpoint of ensuring resistance against the environment inside the sealed case 15, conventionally, a tube made of a Fluorinated resin Copolymer, specifically, a tetrafluoroethylene-hexafluoropropylene Copolymer (FEP) has been used as the covering material of the lead wire 28 and the collective member 29. However, tetrafluoroethylene-hexafluoropropylene copolymer (FEP) is expensive, and therefore, a substitute has been demanded.
Therefore, the hermetic compressor 2 according to the present embodiment combines a single refrigerant of R32 (difluoromethane) or a mixed refrigerant containing R32 in an amount larger than 20 mass% and a lubricating oil 41 containing an ester-based synthetic oil to which an epoxy-containing compound and a phenol-based antioxidant are added, and applies the structure described below to the covering or the collective member 29 of the lead wire 28.
The collecting member 29 of the hermetic compressor 2 according to the present embodiment will be described in more detail.
Fig. 2 is a perspective view of the collecting member of the hermetic compressor according to the present embodiment.
Fig. 3 is a schematic longitudinal sectional view of an assembly member of the hermetic compressor according to the present embodiment.
As shown in fig. 2 and 3, the collecting member 29 of the hermetic compressor 2 according to the present embodiment has a tubular appearance. The collecting member 29 is a multilayer pipe body 53 in which a pipe 52 formed by winding an insulating film 51 in a spiral shape is stacked in 3 or more layers.
In addition, fig. 3 shows a cross section of a multilayer pipe body 53 having a 3-layer pipe 52. That is, the multilayer tubular body 53 shown in fig. 3 includes an innermost tube 52a, an intermediate tube 52b, and an outermost tube 52 c.
In the case of a multilayer tubular body 53 having 4 or more layers of tubes 52, the number of tubes 52 corresponding to the intermediate layer is increased.
The multilayer pipe body 53 is manufactured by the following method: a strip-shaped insulating film 51 is wound around a rod-shaped core called a mandrel, and a tube 52 is sequentially laminated from the innermost layer side to the outermost layer side.
The multilayer pipe body 53 has an adhesive layer 55 for bonding the adjacent pipes 52.
Each tube 52 is formed by spirally winding a strip-shaped insulating film 51. Each tube 52 is preferably a helix wound in the same direction.
The outermost tube 52c is spirally wound with an overlapping portion 56 (overlapping portion) of the insulating films 51. The other tubes 52, i.e., the innermost tube 52a and the intermediate tube 52b, are wound in a spiral shape with substantially no gap.
Between the tubes 52, 52 adjacent to each other in the stacking direction, the spiral joints 57 are shifted from each other in the longitudinal direction of the multilayer tube body 53 so as not to overlap each other, and the joints 57 are arranged within the width W of the insulating film 51 of the adjacent tubes 52.
Specifically, the joint 57a of the innermost tube 52a is not overlapped with the joint 57b of the intermediate tube 52b, and is disposed within the width Wb of the intermediate tube 52 b. In other words, the joint 57b of the intermediate layer tube 52b is not overlapped with the joint 57a of the innermost layer tube 52a, and is disposed within the bandwidth Wa of the innermost layer tube 52 a.
The joint 57c of the outermost tube 52c is not overlapped with the joint 57b of the intermediate tube 52b, and is disposed within the width Wb of the intermediate tube 52 b. In other words, the joint 57b of the intermediate layer tube 52b is not overlapped with the joint 57c of the outermost layer tube 52c, and is disposed within the tape width Wc of the outermost layer tube 52 c.
The bandwidth W of each tube 52 is preferably substantially the same. Also, the overlapping amount of the outermost tubes 52c (the width of the overlapping portion 56) is preferably substantially the same.
The material of the insulating film 51 is at least one of Polyethylene Terephthalate (PET), Polyethylene Naphthalate (PEN), Polyimide (Polyimide, PI), polyphenylene sulfide (PPS), and aramid paper (Nomex, Nomex: registered trademark) mainly composed of aromatic polyamide fibers.
Further, fig. 2 and 3 show a case where the multilayer tube body 53 is applied to the collecting member 29, but the multilayer tube body 53 may be applied to the covering member of the lead wire 28. In this case, the wire material (core wire, conductor wire) of the lead wire 28 is covered with the multilayer tube body 53. When the multilayer tube body 53 is applied to the covering material of the leader line 28, the collecting member 29 may be the multilayer tube body 53 as in the case of the covering material of the leader line 28, or may be a binding tape or a binding wire.
That is, at least either one of the covering material of the lead wire 28 and the assembly member 29 may be a multilayer tube body 53 in which 3 or more layers of the tube 52 formed by winding the insulating film 51 in a spiral shape are stacked.
Here, in the hermetic compressor 2 using the refrigerant and the lubricating oil 41 according to the present embodiment, the inventors conducted experiments in order to find a layer structure of the multilayer pipe body 53 having higher adaptability.
The test sample used was a multilayer tube body 53 (hereinafter simply referred to as "sample tube body") having a 3-layer tube 52 shown in fig. 3. The sample tube body had dimensions of 8.8 mm inside diameter and 150 mm length.
Each tube 52 is a spirally wound tube made of an insulating film 51 of polyethylene terephthalate (PET) having a thickness of 0.025 mm and a width of 15 mm, an insulating film 51 of polyethylene naphthalate (PEN) having a thickness of 0.025 mm and a width of 15 mm, an insulating film 51 of Polyimide (PI) having a thickness of 0.0125 mm and a width of 15 mm, or an insulating film 51 of aramid paper (Nomex, Nomex: registered trademark) having a thickness of 0.057 mm and a width of 15 mm.
The adhesive layer 55 is formed using a urethane adhesive or a urethane-modified epoxy adhesive.
As a heat load of the sample tube body, about half of the sample tube body was immersed in the lubricant oil 41 and the other portions were exposed to the refrigerant, heated to 130 degrees celsius, and kept at 130 degrees celsius for 1000 hours. A single refrigerant of R32 was used as the refrigerant, and a polyol ester to which 0.5 mass% of a glycidyl ester type epoxy resin and 0.1 mass% of a phenol-based antioxidant were added was used as the lubricant 41.
The evaluation items were: the presence or absence of interlayer foaming after heat load, the tensile strength at the time of peeling or peeling before heat load, and the retention rate (reciprocal of the rate of decrease) of the tensile strength after heat load.
The presence or absence of interlayer foaming after heat load was confirmed by visually observing the presence or absence of bubbles between the layers.
Tensile strength was evaluated based on JIS K7161. The sample tube body was stretched, and the tensile strength was determined as the load when any one of the 3-layer tubes 52 was peeled or peeled.
The retention of tensile strength after thermal load is a ratio of tensile strengths measured before and after thermal load.
First, test results regarding the presence or absence of interlayer foaming after a heat load are shown in table 1.
[ Table 1]
According to the test results of table 1, the inventors found that: by applying the aramid paper to the tube 52b of the intermediate layer, interlayer foaming can be prevented.
That is, the material of the intermediate layer tube 52b is preferably aramid paper. In the case of the multilayer pipe body 53 having 4 or more layers, at least 1 layer of the intermediate layer of the pipe 52 may be made of aramid paper.
If bubbles are generated between the layers, peeling or peeling of the insulating film 51 may be accelerated from the bubble portion. Therefore, it can be seen that: by applying the aramid paper to the intermediate layer, it is possible to prevent the generation of air bubbles, and even if the insulating film 51 made of an inexpensive material is used for the covering material of the lead wire 28 and the collective member 29, it is possible to improve the adaptability to the environment in the sealed case 15.
Further, the inventors found, from the test results relating to the tensile strength before thermal load: by providing the overlap portion 56 in the outermost layer, the strength can be dramatically improved.
Specifically, sample No. G of table 1, in which PEN was used for the innermost layer, aramid paper was used for the intermediate layer, PI was used for the outermost layer, and the overlap portion 56 was provided, was higher in tensile strength than sample No. H, compared with sample No. H of table 1, in which the same material combination was used but the overlap portion 56 was not provided. When the tensile strength of sample number G is "1", the tensile strength of sample number H is about "0.5".
The tensile strength of sample No. J of table 1, which used PEN as the innermost layer, aramid paper as the intermediate layer, and PEN as the outermost layer, and had the overlapped portion 56, was higher than that of sample No. K of table 1, which used the same combination but no overlapped portion 56. When the tensile strength of sample No. J is "1", the tensile strength of sample No. K is about "0.44".
Further, the inventors found, from the test results relating to the retention of tensile strength after thermal load: by applying polyethylene naphthalate (PEN) to the outermost tube 52c and the innermost tube 52a, the strength can be suppressed from being lowered.
Specifically, the average of the strength retention rates of sample number G and sample number H in table 1 in which PEN was used for the innermost layer, aramid paper was used for the intermediate layer, and PI was used for the outermost layer was about "0.3" when it was "1" before the heat load.
On the other hand, the average of the strength retention rates of sample No. J and sample No. K in table 1, in which PEN was used for the innermost layer, aramid paper was used for the intermediate layer, and PEN was used for the outermost layer, was about "0.6" when "1" was assumed before the heat load.
Therefore, when PEN is used for the innermost layer and the outermost layer, the strength retention rate is higher than when PEN is used for the innermost layer and PI is used for the outermost layer.
That is, the multilayer tubular body 53 more preferably has a 3-layer structure of polyethylene naphthalate (PEN) as the material of the outermost tube 52c and the innermost tube 52 a.
Further, based on the comparison of the results of the strength test before thermal load of sample number G and sample number I in table 1, the inventors found that: the adhesive layer 55 is preferably formed using a polyurethane adhesive.
Specifically, when comparing sample number G using a polyurethane adhesive for the adhesive layer 55 with sample number I using a polyurethane-modified epoxy resin adhesive for the adhesive layer 55, the tensile strength of sample number G is higher than that of sample number I. When the tensile strength of sample number G is "1", the tensile strength of sample number I is about "0.77".
That is, the multilayer pipe body 53 preferably has an adhesive layer 55 of a urethane adhesive for bonding adjacent layers.
In this way, the hermetic compressor 2 and the refrigeration cycle apparatus 1 according to the present embodiment combine the refrigerant and the lubricant oil 41, and the multilayered pipe body 53 is applied to at least one of the covering of the lead wire 28 and the collective member 29. Therefore, the insulating film 51 made of an inexpensive material can be used for the covering of the lead wire 28 and the collective member 29 in the hermetic compressor 2 and the refrigeration cycle device 1.
In the hermetic compressor 2 and the refrigeration cycle apparatus 1 according to the present embodiment, the multilayer pipe body 53 having the overlap portion 56 is applied to at least one of the covering of the lead wire 28 and the collective member 29. Therefore, the hermetic compressor 2 and the refrigeration cycle apparatus 1 can secure the tensile strength and improve the workability and handling property.
In the hermetic compressor 2 and the refrigeration cycle apparatus 1 according to the present embodiment, the multilayered pipe body 53 is used as at least one of the covering of the lead wire 28 and the collecting member 29. Therefore, the hermetic compressor 2 and the refrigeration cycle apparatus 1 can be made of materials that are less expensive than conventional pipes formed by extrusion molding of tetrafluoroethylene-hexafluoropropylene copolymer (FEP).
Further, in the hermetic compressor 2 and the refrigeration cycle device 1 according to the present embodiment, aramid paper is used as the intermediate layer of the multilayer pipe body 53. Therefore, even if the insulating film 51 made of an inexpensive material is used, the hermetic compressor 2 and the refrigeration cycle device 1 can have improved adaptability to the environment inside the hermetic case 15.
Further, in the hermetic compressor 2 and the refrigeration cycle apparatus 1 according to the present embodiment, the multilayer pipe body 53 having the 3-layer structure in which the insulating film 51 made of polyethylene naphthalate (PEN) is used for the outermost pipe 52c and the innermost pipe 52a is applied. Therefore, the hermetic compressor 2 and the refrigeration cycle device 1 can achieve environmental compatibility, high tensile strength with a minimum number of layers, and high reliability over a long period of time.
In the hermetic compressor 2 and the refrigeration cycle apparatus 1 according to the present embodiment, the multilayer pipe body 53 having the adhesive layer 55 of the urethane adhesive for adhering the adjacent layers is applied. Therefore, the sealed compressor 2 and the refrigeration cycle apparatus 1 can obtain high tensile strength in the multilayer pipe body 53.
Therefore, according to the hermetic compressor 2 and the refrigeration cycle device 1 including the hermetic compressor 2 according to the present embodiment, the covering of the lead wire 28 or the collecting member 29 of the lead wire 28 having a high tensile strength suitable for the environment exposed to the refrigerant and the lubricant oil 41 can be provided.
In addition, in the hermetic compressor 1 according to the present embodiment, the hermetic compressor including the collecting member 29 binding the plurality of lead wires 28 has been described, but the present invention is not limited to this, and the multilayer pipe body 53 may be applied to the covering of the lead wires 28 of the hermetic compressor not including the collecting member 29.
Several embodiments of the present invention have been described, but these embodiments are presented only as examples and are not intended to limit the scope of the invention. The above-described new embodiment can be implemented in various other embodiments, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. The above-described embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the inventions described in the claims and their equivalent scope.
Description of the marks
1: a refrigeration cycle device; 2: a hermetic compressor; 3: a heat sink; 5: an expansion device; 6: a heat sink; 7: a reservoir; 7 a: a suction tube; 8: a refrigerant pipe; 8 a: a discharge pipe; 15: sealing the shell; 16: an electric motor; 17: a compression mechanism; 18: a rotating shaft; 18 a: a middle portion; 18 b: a lower end portion; 21: a main bearing; 22: a secondary bearing; 23: a hermetic terminal; 25: a stator; 26: a rotor; 28. 28a, 28b, 28 c: an outgoing line; 29: a collection component; 31: an eccentric portion; 32: a cylinder chamber; 33: a cylinder body; 35: a rolling member; 36: a fastening member; 37: a discharge muffler; 38: a fastening member; 41: lubricating oil; 51: an insulating film; 52. 52a, 52b, 52 c: a tube; 53: a multilayer pipe body; 55: an adhesive layer; 56: an overlapping portion; 57. 57a, 57b, 57 c: and (6) seaming.
Claims (7)
1. A hermetic compressor for compressing a single refrigerant of R32, i.e., difluoromethane, or a mixed refrigerant containing more than 20 mass% of R32, using a lubricating oil containing an ester-based synthetic oil to which an epoxy-containing compound and a phenol-based antioxidant are added, the hermetic compressor comprising:
sealing the shell;
a compression mechanism disposed in the sealed casing and capable of compressing the single refrigerant or the mixed refrigerant;
a motor for driving the compression mechanism;
a hermetic terminal provided in the hermetic case;
a plurality of lead wires which are led out from the motor and connected to the hermetic terminal; and
a collecting member for bundling the plurality of lead wires,
the collecting member is a multilayer tube body in which a tube formed by winding an insulating film in a spiral shape is stacked by 3 or more layers,
the outermost layer of the multilayer pipe body has a portion where the insulating films are overlapped with each other,
at least 1 layer of the middle layer of the multilayer pipe body is made of aramid paper.
2. A hermetic compressor for compressing a single refrigerant of R32, i.e., difluoromethane, or a mixed refrigerant containing more than 20 mass% of R32, using a lubricating oil containing an ester-based synthetic oil to which an epoxy-containing compound and a phenol-based antioxidant are added, the hermetic compressor comprising:
sealing the shell;
a compression mechanism disposed in the sealed casing and capable of compressing the single refrigerant or the mixed refrigerant;
a motor for driving the compression mechanism;
a hermetic terminal provided in the hermetic case; and
a plurality of lead wires which are led out from the motor and connected to the hermetic terminal,
the coating member of the lead-out wire is a multilayer tube body in which a tube formed by winding an insulating film in a spiral shape is overlapped by 3 or more layers,
the outermost layer of the multilayer pipe body has a portion where the insulating films are overlapped with each other,
at least 1 layer of the middle layer of the multilayer pipe body is made of aramid paper.
3. A hermetic compressor for compressing a single refrigerant of R32, i.e., difluoromethane, or a mixed refrigerant containing more than 20 mass% of R32, using a lubricating oil containing an ester-based synthetic oil to which an epoxy-containing compound and a phenol-based antioxidant are added, the hermetic compressor comprising:
sealing the shell;
a compression mechanism disposed in the sealed casing and capable of compressing the single refrigerant or the mixed refrigerant;
a motor for driving the compression mechanism;
a hermetic terminal provided in the hermetic case;
a plurality of lead wires which are led out from the motor and connected to the hermetic terminal; and
a collecting member for bundling the plurality of lead wires,
the leading-out wire covering member and the collecting member are a multilayer tube body in which a tube formed by winding an insulating film in a spiral shape is stacked by 3 or more layers,
the outermost layer of the multilayer pipe body has a portion where the insulating films are overlapped with each other,
at least 1 layer of the middle layer of the multilayer pipe body is made of aramid paper.
4. The hermetic compressor according to any one of claims 1 to 3, wherein,
the material of the insulating film other than the 1 layer composed of aramid paper of the multilayer pipe body is at least one of polyethylene terephthalate, polyethylene naphthalate, polyimide, polyphenylene sulfide, and aramid paper.
5. The hermetic compressor according to any one of claims 1 to 3, wherein,
the multilayer pipe body has a 3-layer structure of polyethylene naphthalate as a material of the outermost pipe and the innermost pipe.
6. The hermetic compressor according to any one of claims 1 to 3, wherein,
the multilayer pipe body has an adhesive layer of a polyurethane adhesive for bonding adjacent pipes.
7. A refrigeration cycle device is provided with:
the hermetic compressor according to any one of claims 1 to 6;
a heat sink;
an expansion device;
a heat sink; and
and a refrigerant pipe for connecting the hermetic compressor, the radiator, the expansion device, and the heat absorber and allowing a refrigerant to flow therethrough.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-090459 | 2016-04-28 | ||
| JP2016090459 | 2016-04-28 | ||
| PCT/JP2017/010585 WO2017187828A1 (en) | 2016-04-28 | 2017-03-16 | Hermetic compressor and refrigeration cycle device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109072896A CN109072896A (en) | 2018-12-21 |
| CN109072896B true CN109072896B (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780026024.6A Active CN109072896B (en) | 2016-04-28 | 2017-03-16 | Hermetic compressor and refrigeration cycle device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6617196B2 (en) |
| CN (1) | CN109072896B (en) |
| WO (1) | WO2017187828A1 (en) |
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| JPH087106Y2 (en) * | 1990-11-30 | 1996-02-28 | 三菱電機株式会社 | Hermetic electric compressor |
| JPH10145999A (en) * | 1996-11-14 | 1998-05-29 | Hitachi Ltd | Electric machine |
| CN101541932A (en) * | 2007-05-10 | 2009-09-23 | 松下电器产业株式会社 | Hermetic compressor and refrigeration system |
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- 2017-03-16 WO PCT/JP2017/010585 patent/WO2017187828A1/en active Application Filing
- 2017-03-16 CN CN201780026024.6A patent/CN109072896B/en active Active
- 2017-03-16 JP JP2018514188A patent/JP6617196B2/en active Active
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| CN1131236A (en) * | 1994-09-16 | 1996-09-18 | 三洋电机株式会社 | Sealing electric compression engine |
| WO1996035875A1 (en) * | 1995-05-08 | 1996-11-14 | Danfoss Compressors Gmbh | Refrigerant compressor |
| JPH1189153A (en) * | 1997-09-04 | 1999-03-30 | Matsushita Electric Ind Co Ltd | Electric compressor and its manufacture |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6617196B2 (en) | 2019-12-11 |
| CN109072896A (en) | 2018-12-21 |
| JPWO2017187828A1 (en) | 2019-02-14 |
| WO2017187828A1 (en) | 2017-11-02 |
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