Refrigeration cycle device

Abstract

The refrigeration cycle device (1) includes a refrigerant and a refrigeration cycle circuit. The refrigeration cycle circuit has a compressor (10) that circulates the refrigerant. The refrigerant is an HFO-based refrigerant monomer or a mixed refrigerant. The mixing ratio of the HFO-based refrigerant in the mixed refrigerant is 10% by weight or more. The compressor (10) has a motor (30). The motor (30) has resin components (31d, 31e, 31f, 31g, 31h). The resin components (31d, 31e, 31f, 31g, 31h) are made of polyimide having ends blocked by end groups.

Description

Technical Field

[0001] The present invention relates to a refrigeration cycle device for refrigeration, heating, etc. Background Art

[0002] The refrigeration cycle device of Patent Document 1 (Japanese Patent No. 4932793) uses HFO-1234yf as a refrigerant. Summary of the Invention

[0003] Technical Problem to be Solved by the Invention

[0004] Components for a refrigeration cycle device sometimes contain a resin material. Depending on the type of resin material, it may chemically react with the refrigerant to produce an acid. The acid generated as described above may cause corrosion or deterioration of the components.

[0005] Technical Solution for Solving the Technical Problem

[0006] The refrigeration cycle device according to the first aspect includes a refrigerant and a refrigeration cycle circuit. The refrigeration cycle circuit has a compressor and circulates the refrigerant. The refrigerant is an HFO refrigerant monomer or a mixed refrigerant. The mixing ratio of the HFO refrigerant in the mixed refrigerant is 10% by weight or more. The compressor has a motor. The motor has a resin component. The resin component is made of polyimide having a terminal closed by a terminal group.

[0007] According to the above structure, the motor has a resin component made of PI (polyimide) having a terminal closed by a terminal group. Therefore, compared with the case where the PI has an unclosed terminal group, the amount of acid generated by the reaction of such a resin component with the HFO refrigerant is less. Therefore, corrosion caused by acid can be suppressed in the components constituting the refrigeration cycle system.

[0008] Based on the refrigeration cycle device according to the first aspect, in the refrigeration cycle device according to the second aspect, the ratio of the resin component to the refrigerant is 0.2% by weight or more.

[0009] According to the above structure, the ratio of the resin component to the refrigerant is 0.2% by weight or more. Therefore, since a larger amount of the resin component is not easily reactive with the HFO refrigerant, the generation of acid can be suppressed.

[0010] Based on the refrigeration cycle device according to the first aspect or the second aspect, the refrigeration cycle device according to the third aspect further includes refrigeration oil and an acid scavenger. The refrigeration oil is stored in the compressor, and the acid scavenger is added to the refrigeration oil. The ratio of the acid scavenger to the refrigerant is 1.6% by weight or less.

[0011] Based on the above structure, the ratio of the acid scavenger to the refrigerant is 1.6% by weight or less. Therefore, it is possible to suppress the reduction in the lubricity of the refrigeration oil due to the acid scavenger.

[0012] Based on the refrigeration cycle device described in any one of the first to third viewpoints, in the refrigeration cycle device of the fourth viewpoint, the motor has a wire covered with an insulating protective layer and insulating paper. The resin component includes the insulating protective layer or the insulating paper.

[0013] Based on the above structure, the insulating protective layer or the insulating paper contains PI. Therefore, it is possible to suppress the reduction in the heat resistance of the motor.

[0014] Based on the refrigeration cycle device described in any one of the first to fourth viewpoints, in the refrigeration cycle device of the fifth viewpoint, the resin component includes at least one selected from the insulating sleeve and the binding wire of the motor.

[0015] Based on the above structure, the component for the motor is made of PI having ends blocked by end groups. Therefore, the generation of acid in the motor is suppressed, and the corrosion of the motor can be suppressed.

[0016] Based on the refrigeration cycle device described in any one of the first to fifth viewpoints, the refrigeration cycle device of the sixth viewpoint further includes a sliding portion made of polyimide having ends blocked by end groups.

[0017] Based on the above structure, the sliding portion is made of PI having ends blocked by end groups. Therefore, the generation of acid at the sliding portion is suppressed, and the corrosion of the sliding portion can be suppressed. Description of the Drawings

[0018] Figure 1 It is a schematic diagram showing the refrigeration cycle device 1.

[0019] Figure 2 It is a cross-sectional view of the compressor 10.

[0020] Figure 3 It is another cross-sectional view of the compressor 10.

[0021] Figure 4 It is a cross-sectional view of the motor 30.

[0022] Figure 5 It is a perspective view of the screw rotor 52 and the star wheel 53.

[0023] Figure 6 It is the test result of the degree of acid generation regarding the combination of the resin and the refrigerant.

[0024] Figure 7Test results on the degree of acid generation regarding a combination of a resin and a refrigerant. Detailed implementation mode

[0025] (1) Overall structure

[0026] Figure 1 The refrigeration cycle device 1 of an embodiment is shown. The refrigeration cycle device 1 includes a refrigeration cycle circuit and a refrigerant that circulates in the refrigeration cycle circuit.

[0027] (1-1) Refrigerant

[0028] The refrigerant is an HFO-based refrigerant monomer or a mixed refrigerant. In the case of a mixed refrigerant, the mixing ratio of the HFO-based refrigerant is 10% by weight or more, preferably 14% by weight or more. Examples of the HFO-based refrigerant include R1123, R1234yf, R1234ze, etc. As the refrigerant, for example, Refrigerants 1 to 75 shown in the following table can be used.

[0029] (Table 1)

[0030]

[0031]

[0032]

[0033] (1-2) Refrigeration cycle circuit

[0034] The refrigeration cycle circuit has a compressor 10, a four-way reversing valve 3, a heat source heat exchanger 4, an expansion valve 5, and a utilization heat exchanger 6. The structure of the compressor 10 will be described later.

[0035] When the four-way reversing valve 3 forms a solid-line connection, the utilization heat exchanger 6 provides cooling and heating to the user. When the four-way reversing valve 3 forms a dotted-line connection, the utilization heat exchanger 6 provides warm heat to the user.

[0036] The expansion valve 5 has a sliding part. The sliding part of the expansion valve 5 is covered with a coating material. The coating material can be composed of PI (polyimide) having ends closed by end groups. Details of the PI having ends closed by end groups will be described later.

[0037] (2) Detailed structure of the compressor 10

[0038] Figure 2 and Figure 3 The compressor 10 shown is a screw-type compressor. The compressor 10 has a housing 20, a motor 30, a shaft 40, and a compression mechanism 50.

[0039] (2-1) Housing 20

[0040] The outer casing 20 is a cylindrical container extending in the horizontal direction in the figure. The internal space of the outer casing 20 is divided into a low-pressure space S1 and a high-pressure space S2. Refrigerating oil L is stored below the high-pressure space S2. The refrigerating oil L is supplied to the sliding parts at various locations of the compressor 10 through an oil supply path (not shown).

[0041] An intake port 25 is provided on the low-pressure space S1 side of the outer casing 20. An exhaust port 26 is formed on the high-pressure space S2 side of the outer casing 20. Low-pressure gaseous refrigerant is introduced into the compressor 10 from the intake port 25. High-pressure gaseous refrigerant is discharged from the exhaust port 26.

[0042] (2-2) Motor 30

[0043] The motor 30 is disposed in the low-pressure space S1. As Figure 2 shown, the motor 30 has a stator 31 and a rotor 32. The stator 31 is fixed to the inner peripheral surface of the outer casing 20. The rotor 32 is disposed in the cavity of the stator 31 and is fixed to the shaft 40.

[0044] As Figure 4 shown, the stator 31 has a stator core 31a, an insulator 31b, a coil winding 31c, an insulating paper 31d, an insulated wire 31e, an insulating sleeve 31f, a binding wire 31g, and a bundling block 31h.

[0045] The stator core 31a is composed of laminated steel plates. The insulator 31b is made of resin and is provided on the end face of the stator core 31a. The coil winding 31c is composed of a conductive material and is wound around the stator core 31a and the insulator 31b. The insulating paper 31d is made of resin and is installed in the cut grooves between adjacent coil windings 31c, etc. The insulated wire 31e is composed of a wire and an insulating protective layer covering the wire. The insulating sleeve 31f is made of resin and insulates the connection part of the insulated wire 31e from the surroundings. The binding wire 31g is made of resin and fixes the insulated wire 31e to the insulator 31b. The bundling block 31h is the housing of a connector made of resin and connects multiple insulated wires 31e in a detachable manner.

[0046] The insulator 31b, the insulating paper 31d, the protective layer of the insulated wire 31e, the insulating sleeve 31f, the binding wire 31g, and the bundling block 31h are resin components. Among them, the protective layer of the insulated wire 31e and the insulating paper 31d are made of PI (polyimide) having ends closed by end groups. Details of the PI having ends closed by end groups will be described later.

[0047] In addition, the insulating sleeve 31f and the binding wire 31g may also be made of PI having ends closed by end groups.

[0048] On the other hand, the insulating member 31b and the bundling block 31h are made of a resin material other than PI. Examples of the resin material other than PI include PET (polyethylene terephthalate), PA (polyamide), LCP (liquid crystal polymer), PBT (polybutylene terephthalate), phenol resin, melamine resin, PEEK (polyetheretherketone), PTFE (polytetrafluoroethylene), PAI (polyamideimide), PPS (polyphenylene sulfide), and PEN (polyethylene naphthalate).

[0049] The ratio of PI having ends blocked by end groups to the refrigerant is 1.5 wt% or more.

[0050] (2 - 3) Axis 40

[0051] Return to Figure 2 and Figure 3 , and the axis 40 transmits the power generated by the motor 30 to the compression mechanism 50. The axis 40 is fixed to the rotor 32 and rotates together with the rotor 32. The axis 40 is supported by bearings 41 so as to be rotatable. When sliding bearings are used as the bearings 41, the resin material contained in the sliding bearings may also be made of PI having ends blocked by end groups.

[0052] (2 - 4) Compression mechanism 50

[0053] The compression mechanism 50 compresses the low - pressure gas refrigerant to generate a high - pressure gas refrigerant. The compression mechanism 50 includes a cylinder block 51, a screw rotor 52, a star wheel 53, and a star wheel support portion 54.

[0054] (2 - 4 - 1) Cylinder block 51

[0055] The cylinder block 51 is formed as a part of the outer shell 20. The cylinder block 51 houses the screw rotor 52. The cylinder block 51 has a void for the star wheel piece 53a described later to pass through.

[0056] (2 - 4 - 2) Screw rotor 52

[0057] The screw rotor 52 is a metal member having a substantially cylindrical shape. The screw rotor 52 is connected to the axis 40. The screw rotor 52 can rotate together with the axis 40. The outer diameter of the screw rotor 52 is slightly smaller than the inner diameter of the cylinder block 51.

[0058] Figure 5 The screw rotor 52 and the star wheel 53 are shown. The cylinder block 51 is omitted in this figure. On the outer periphery of the screw rotor 52, a plurality of spiral grooves 52a extending spirally in the extending direction of the rotation axis of the screw rotor 52 are provided.

[0059] (2 - 4 - 3) Star wheel 53

[0060] The star wheel 53 is a rotating body having a plurality of star wheel vanes 53a extending radially. The star wheel vanes 53a penetrate the gaps of the cylinder block 51 and thus engage with the helical grooves 52a of the screw rotor 52. Under the action of the rotational force received from the shaft 40, the screw rotor 52 rotates. As a result, the helical grooves 52a move. According to the movement of the helical grooves 52a, the star wheel vanes 53a move, and thus, the star wheel 53 rotates.

[0061] (2-4-4) Star wheel support portion 54

[0062] The star wheel support portion 54 supports the star wheel 53 so that it can rotate. The two star wheel support portions 54 are arranged symmetrically with respect to the rotation axis of the screw rotor 52.

[0063] (2-5) Others

[0064] The screw rotor 52 slides relative to the cylinder block 51 and the star wheel 53. These sliding portions can also be covered with a coating material. For example, the coating material can also be composed of PI having ends blocked by end groups.

[0065] (3) Compression operation

[0066] From Figure 2 The low-pressure gas refrigerant sucked in from the suction port 25 shown enters the low-pressure space S1. In the compression mechanism 50, the space surrounded by the cylinder block 51, the helical grooves 52a, and the star wheel vanes 53a functions as a compression chamber. As the screw rotor 52 rotates, the volume of the compression chamber on the low-pressure space S1 side gradually decreases and moves toward the high-pressure space S2 side. Thus, the low-pressure gas refrigerant is compressed into a high-pressure gas refrigerant and discharged to the high-pressure space S2. Finally, the high-pressure gas refrigerant is discharged from the discharge port 26 to the outside of the compressor 10.

[0067] (4) Refrigeration oil L

[0068] The refrigeration oil L is a lubricating oil for preventing wear and burn at the sliding portions of the compressor 10. The refrigeration oil L mainly consists of base oil, acid scavenger, extreme pressure agent, and antioxidant.

[0069] (4-1) Base oil

[0070] Mineral oil or synthetic oil is used as the base oil. A base oil having good compatibility with the refrigerant used in the refrigeration cycle device 1 is appropriately selected. Mineral oil is, for example, naphthenic mineral oil, paraffinic mineral oil. Synthetic oil is, for example, ester compound, ether compound, polyalpha-olefin, alkylbenzene. As specific examples of synthetic oil, polyvinyl ether, polyol ester, polyalkylene glycol, etc. can be cited. In the present embodiment, as the base oil, synthetic oils such as polyvinyl ether and polyol ester are preferred. In addition, as the base oil, a mixture formed by combining two or more of the above-mentioned mineral oils or synthetic oils can also be used.

[0071] (4-2) Acid scavenger

[0072] An acid scavenger is an additive that reacts with the acid generated due to the decomposition of the refrigerant to inhibit the deterioration of the refrigeration oil L caused by the acid. Examples of the acid scavenger include epoxy compounds, carbodiimide compounds, and terpene compounds. Specific examples of the acid scavenger include 2-ethylhexyl glycidyl ether, phenyl glycidyl ether, epoxycyclohexyl methanol, bis(alkylphenyl)carbodiimide, β-pinene, etc.

[0073] (4-3) Extreme pressure agent

[0074] An extreme pressure agent is an additive used to prevent wear and burn at the sliding part. The refrigeration oil L prevents the sliding members from contacting each other by forming an oil film between the surfaces of the members sliding against each other at the sliding part. However, in the case of using a refrigeration oil L with a low viscosity such as polyvinyl ether, and in the case where the pressure applied to the sliding members is high, the sliding members are likely to contact each other. The extreme pressure agent forms a coating film by reacting with the surfaces of the members sliding against each other at the sliding part, thereby suppressing the occurrence of wear and burn. Examples of the extreme pressure agent include phosphate esters, phosphite esters, thiophosphate salts, sulfide esters, thioethers, thiophenols, etc. Specific examples of the extreme pressure agent include tricresyl phosphate (TCP), triphenylphosphine (TPP), triphenyl thiophosphate (TPPT), amines, C11-14 side-chain alkyl groups, mono-hydroxy and di-hydroxy phosphates. TCP forms a phosphate coating film by adsorbing to the surface of the sliding member and decomposing.

[0075] (4-4) Antioxidant

[0076] An antioxidant is an additive used to prevent the oxidation of the refrigeration oil L. Specific examples of the antioxidant include zinc dithiophosphate, organic sulfur compounds, phenols such as 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, 2,2'-methylenebis(4-methyl-6-tert-butylphenol), etc., amine antioxidants such as phenyl-α-naphthylamine, N,N'-diphenyl-p-phenylenediamine, N,N'-disalicylidene-1,2-diaminopropane, etc.

[0077] (4-5) Mixing ratio

[0078] The acid scavenger is contained in the refrigeration oil L at 1.0% by weight or more, for example. Thereby, the deterioration of the refrigeration oil L caused by the acid and the corrosion of the expansion valve 5 are suppressed. In addition, the corrosion of other components of the refrigeration cycle device 1 is also suppressed. Therefore, by using the refrigeration oil L of the present embodiment, the reliability of the refrigeration cycle device 1 is improved.

[0079] The ratio of the acid scavenger to the refrigerant is 1.6 wt% or less. Thereby, a decrease in the lubricating performance of the refrigeration oil L can be suppressed.

[0080] (5) PI (polyimide) blocked by end groups

[0081] The molecular formula of PI (polyimide) is shown by Chemical Formula 1 below.

[0082] [Chemical Formula 1]

[0083]

[0084] Its ends are blocked by end groups. The end groups mentioned here exclude the end H groups. Regarding PI blocked by end groups, it is not necessary for all ends to be blocked by end groups. For example, there are cases where an effect can be achieved as long as 50% of the ends are blocked. Hereinafter, structural examples of the end groups will be shown.

[0085] (5-1) First structural example

[0086] In the first structural example, an alkyl group having 1 to 10 carbon atoms is used for blocking PI.

[0087] That is, the end group is shown by Chemical Formula 2 below.

[0088] [Chemical Formula 2]

[0089] CH 3 、

[0090] CH 3 CH 2 、

[0091] ····

[0092] CH 3 (CH 2 ) 9 。

[0093] (5-2) Second structural example

[0094] In the second structural example, phthalic anhydride or a derivative of phthalic anhydride is used for blocking PI. That is, the end group is shown by Chemical Formula 3 below.

[0095] [Chemical Formula 3]

[0096]

[0097] Here, any one of R 4 、R 5 、R 6 、R 7 is the end of the polyimide. R 4 、R5 , R 6 , R 7 The remaining parts in are independent of each other and are shown in the structures of H, Br, Cl, F, alkyl, alkoxy or fluoroalkyl.

[0098] (5-3) Third structural example

[0099] In the third structural example, the terminal group is shown by the following Chemical Formula 4.

[0100] [Chemical Formula 4]

[0101]

[0102] Here, n is an integer of 1 or more and 4 or less. X 1 represents a non-reactive electron-withdrawing group. Any one of the plurality of Xs 1 is the terminal of the polyimide. The remaining parts of the plurality of Xs 1 can be the same group or different groups.

[0103] (5-4) Terminal capping method

[0104] The terminal capping method of PI is not limited, and any currently known method can be adopted.

[0105] As a preferred method, there is a method of using a terminal capping agent. As the terminal capping agent, any currently known terminal capping agent may be used.

[0106] Generally, as the terminal capping agent for capping the terminal amino group, alkyls of C 1 to C 10 , acid anhydrides such as phthalic anhydride, 1,2-cyclohexanedicarboxylic anhydride, 4-methylcyclohexane-1,2-dicarboxylic anhydride or (2-hydroxy-2-propene) succinic anhydride, and organic chloric acids such as vinyl benzoate can be listed.

[0107] In addition, as the terminal capping agent for capping the terminal acid anhydride group, amine compounds such as 3-aminophenylacetylene, aniline or cyclohexylamine can be listed.

[0108] For the terminal capping of PI, these terminal capping materials can also be used.

[0109] (6) Tests

[0110] (6-1) PI with un-capped terminals

[0111] The inventor obtained an insight that PI with un-capped terminals easily generates acid through reaction with HFO-based refrigerants. The test method for obtaining the above insight is as follows.

[0112] Put the ether oil, refrigerant, and resin material into a container. Then, keep the temperature inside the container at 140 °C and leave it for 500 hours. Finally, measure the acid value of the content in the container.

[0113] In this experiment, as the refrigerants, HFO refrigerants (R1234ze, R1234yf) and HFC refrigerant (R134a) were used respectively. As the resin materials, PET (polyethylene terephthalate), PA (polyamide), and PI (polyimide) were used respectively.

[0114] Figure 6 These are the test results. It can be understood that, compared with other cases, the acid value is significantly higher when the HFO refrigerants (R1234ze, R1234yf) and PI (polyimide) are put into the container together.

[0115] (6 - 2) PI having ends blocked by end groups

[0116] The inventor obtained an insight that PI having ends blocked by end groups does not easily react with HFO - type refrigerants and thus does not easily generate acid. The test method for obtaining the above - mentioned insight is the same as that described in (6 - 1).

[0117] In this experiment, as the refrigerant, HFO refrigerants (R1234ze, R1234yf) were used. As the resin materials, PI without blocked ends and PI of the end - blocked type were used respectively.

[0118] Figure 7 These are the test results. It can be understood that, compared with PI having unblocked ends, PI having ends blocked by end groups does not easily generate acid.

[0119] (7) Features

[0120] (7 - 1)

[0121] The motor 30 has resin components (i.e., at least a part of the insulating paper 31d, the insulating protective layer of the wire 31e, the insulating sleeve 31f, the binding wire 31g, and the bundling block 31h) made of PI having ends blocked by end groups. Therefore, compared with the case of PI having unblocked ends, the amount of acid generated by such resin components due to the reaction of the resin components with HFO - type refrigerants is less. Therefore, in the components constituting the refrigeration cycle system, corrosion caused by acid can be inhibited.

[0122] (7 - 2)

[0123] The ratio of the resin component composed of PI with ends blocked by end groups to the refrigerant is 0.2% by weight or more. Therefore, since the relatively large amount of the resin component is not likely to react with the HFO refrigerant, the generation of acid can be suppressed.

[0124] (7-3)

[0125] The ratio of the acid scavenger to the refrigerant is 1.6% by weight or less. Therefore, it is possible to suppress the reduction in the lubricity of the refrigeration oil due to the acid scavenger.

[0126] (7-4)

[0127] The insulating protective layer of the wire 31e or the insulating paper 31d contains PI. Therefore, it is possible to suppress the reduction in the heat resistance of the motor.

[0128] (7-5)

[0129] The components for the motor 30 (i.e., the insulating sleeve 31f and the binding wire 31g) may also be composed of PI with ends blocked by end groups. In this case, the generation of acid in the motor 30 is suppressed, and the corrosion of the motor 30 can be inhibited.

[0130] (7-6)

[0131] The coating material of the expansion valve 5, the coating material of the motor 30, or the sliding parts such as the sliding bearing of the shaft 40 may also be composed of PI with ends blocked by end groups. In this case, the generation of acid at the sliding parts is suppressed, and the corrosion of the sliding parts can be inhibited.

[0132] (8) Modification

[0133] In the above-described embodiment, the compressor 10 is a screw compressor. As an alternative, the compressor may be other types of compressors such as a scroll compressor or a rotary compressor.

[0134] <Conclusion>

[0135] The embodiments of the present disclosure have been described above. However, it should be understood that various changes in form and details can be made without departing from the gist and scope of the present disclosure recited in the claims.

[0136] Reference Signs

[0137] 1: Refrigeration cycle device;

[0138] 5: Expansion valve;

[0139] 10: Compressor;

[0140] 30: Motor;

[0141] 31: Stator;

[0142] 31a: Stator core;

[0143] 31b: Insulating part;

[0144] 31c: Coil winding;

[0145] 31d: Insulating paper;

[0146] 31e: Insulated wire;

[0147] 31f: Insulating sleeve;

[0148] 31g: Binding wire;

[0149] 31h: Bunching block;

[0150] 32: Rotor;

[0151] 40: Shaft;

[0152] 50: Compression mechanism;

[0153] L: Refrigeration oil.

[0154] Prior art documents

[0155] Patent documents

[0156] Patent Document 1: Japanese Patent Publication No. 4932793.

Claims

1. A refrigeration cycle device (1), characterized in that, comprising: a refrigerant; and a refrigeration cycle circuit having heat exchangers (4, 6) and a compressor (10) and circulating the refrigerant, wherein the refrigerant is an HFO refrigerant monomer or a mixed refrigerant with a mixing ratio of 10% by weight or more of an HFO refrigerant, the compressor has a motor (30), and the motor has resin components (31d, 31e, 31f, 31g, 31h), and the resin components are made of polyimide having ends blocked by end groups.

2. The refrigeration cycle device according to claim 1, characterized in that, the ratio of the resin components to the refrigerant is 0.2% by weight or more.

3. The refrigeration cycle device according to claim 1 or 2, characterized in that, the refrigeration cycle device further comprises: refrigeration oil (L) stored in the compressor; and an acid scavenger added to the refrigeration oil, wherein the ratio of the acid scavenger to the refrigerant is 1.6% by weight or less.

4. The refrigeration cycle device according to claim 1 or 2, characterized in that, the motor has a wire (31e) covered with an insulating protective layer and insulating paper (31d), and the resin components include the insulating protective layer or the insulating paper.

5. The refrigeration cycle device according to claim 3, characterized in that, the motor has a wire (31e) covered with an insulating protective layer and insulating paper (31d), and the resin components include the insulating protective layer or the insulating paper.

6. The refrigeration cycle device according to claim 1 or 2, characterized in that, the resin components include at least one selected from the insulating sleeve (31f) and the binding wire (31g) of the motor.

7. The refrigeration cycle device according to claim 3, characterized in that, the resin components include at least one selected from the insulating sleeve (31f) and the binding wire (31g) of the motor.

8. The refrigeration cycle device according to claim 4, characterized in that, the resin components include at least one selected from the insulating sleeve (31f) and the binding wire (31g) of the motor.

9. The refrigeration cycle device according to claim 1 or 2, characterized in that, the refrigeration cycle device further comprises a sliding part made of polyimide having ends blocked by end groups.

10. A compressor (10) configured to compress a refrigerant, characterized in that, comprising a motor (30), the motor having resin components (31d, 31e, 31f, 31g, 31h), wherein the refrigerant is an HFO refrigerant monomer or a mixed refrigerant with a mixing ratio of 10% by weight or more of an HFO refrigerant, and the resin components are made of polyimide having ends blocked by end groups.

Images