JP7460017B2 - Refrigeration cycle equipment, compressor, motor, stator and stator manufacturing method - Google Patents

Description

The present disclosure relates to a refrigeration cycle device, a compressor used in the refrigeration cycle device, a motor used in the compressor, a stator used in the motor, and a method for manufacturing a stator used in the refrigeration cycle device.

Various measures against climate change have been reported internationally to prevent global warming. In particular, refrigerants used in refrigeration cycle devices are being replaced with refrigerants that have a lower global warming potential than R410A, which has been mainly used in the past. R410A is a mixed refrigerant in which difluoromethane is mixed at a weight ratio of 50 wt% and pentafluoroethane is mixed at a weight ratio of 50 wt%. In addition, wt% (weight %) is a numerical value representing the percentage by weight of a target substance in a product containing a plurality of substances. Note that the global warming potential will be referred to as GWP (Global Warming Potential) in the following explanation. Further, difluoromethane will be referred to as HFC (Hydrofluorocarbon) 32 in the following description. Furthermore, pentafluoroethane will be referred to as HFC125 in the following description. Further, the GWP of R410A is 2090.

Furthermore, in recent years, a single refrigerant, HFC32, with a GWP of 675, has been used as an alternative refrigerant to R410A in refrigeration cycle equipment. However, HFC32 is a mildly flammable refrigerant. For this reason, HFC32 cannot be used in areas where the use of mildly flammable refrigerants is legally restricted. Even in areas where the use of mildly flammable refrigerants is legally permitted, various restrictions are imposed on its use. For example, in a refrigeration cycle equipment using HFC32 as a refrigerant, even if HFC32 leaks, a means, equipment, or structure is required to diffuse the leaked refrigerant so that the HFC32 does not accumulate and form a flammable concentration range. In addition, in a refrigeration cycle equipment using HFC32 as a refrigerant, a sensor that detects refrigerant leakage in a place where the leaked HFC32 is likely to accumulate, and an alarm device that issues an alarm when the sensor detects a refrigerant leakage, are required.

Under these circumstances, Patent Document 1 discloses a refrigeration cycle device using a refrigerant that is a mixture of HFC32, HFC125, and trifluoroiodomethane (CF ₃ I). The refrigerant described in Patent Document 1 has a GWP of 750 or less, lower than R410A, and has lower flammability than HFC32, and is a refrigerant that has both low GWP and low flammability.

Further, a compressor used in a refrigeration cycle device has a motor, and the motor further has a stator. In such a stator, for example, like the stator disclosed in Patent Document 2, the stator winding wound around the iron core member is fixed to the insulating member, and then the excess portion of the stator winding is cut off. Manufactured by performing a process. Further, the stator disclosed in Patent Document 2 uses a stator winding composed of a core wire that is a conductor and a coating that covers the core wire.

Patent No. 6545337 JP2020-178530A

Some refrigerants generate substances that accelerate the deterioration of metals. For example, the refrigerant disclosed in Patent Document 1 contains trifluoroiodomethane. The C-I bond contained in trifluoroiodomethane has a smaller bond energy than the C-F bonds contained in R410A and HFC32, and trifluoroiodomethane is thermally unstable compared to R410A and HFC32. When the C-I bond of trifluoroiodomethane is cleaved, a trifluoromethyl radical (CF _3. ) and an iodine radical (I.) are generated. The generated trifluoromethyl radical and iodine radical react with hydrogen in the refrigeration oil to generate trifluoromethane (CHF ₃ ) and hydrogen iodide (HI), respectively. The generated hydrogen iodide reacts with metal parts in the refrigeration cycle device. The deterioration of metal parts that react with hydrogen iodide is accelerated. In particular, the compressor becomes very hot due to heat generated by the motor, which makes it easy for the C--I bond of trifluoroiodomethane to be cleaved, and the metal parts of the compressor deteriorate more rapidly than the metal parts in other refrigeration cycle devices.

Further, the stator disclosed in Patent Document 2 is manufactured by cutting off the excess portion of the magnet wire (the stator winding of Patent Document 2 is applicable). Therefore, in the stator disclosed in Patent Document 2, the end surface of the core wire may be exposed at the end of the magnet wire. When a stator in which the end face of the core wire is exposed is used in a refrigeration cycle device, the core wire may come into contact with the refrigerant at the end of the magnet wire.

When the stator in which the end face of the core wire is exposed at the end of the magnet wire disclosed in Patent Document 2 is used in the refrigeration cycle device containing trifluoroiodomethane disclosed in Patent Document 1, the refrigeration cycle Hydrogen iodide is generated during operation of the device, and the core wire reacts with hydrogen iodide, accelerating deterioration of the core wire. When the core wire deteriorates, defects such as an increase in electrical resistance or wire breakage occur, which impairs the reliability of the refrigeration cycle device.

The present disclosure relates to a refrigeration cycle device that can suppress deterioration of a core wire of a magnet wire due to a substance that accelerates the deterioration of a metal produced from a refrigerant, such as hydrogen iodide in trifluoroiodomethane, and a refrigeration cycle device that can be used in the refrigeration cycle device. The present invention aims to provide a method for manufacturing a compressor, a motor used in the compressor, a stator used in the motor, and a stator used in the refrigeration cycle device.

A refrigeration cycle device according to one embodiment of the present disclosure includes a compressor that compresses a refrigerant, a condenser that condenses the refrigerant discharged from the compressor, a pressure reduction device that reduces the pressure of the refrigerant flowing out from the condenser, and an evaporator that evaporates the refrigerant reduced in pressure by the pressure reduction device, wherein the refrigerant produces a substance that accelerates metal deterioration, the compressor includes a compression mechanism that compresses the refrigerant, and a motor having a rotor and a stator and driving the compression mechanism, the stator includes a stator core having a plurality of teeth and a magnet wire wound around the teeth, the magnet wire includes a magnet wire core wire which is a conductor, an outer circumferential protection portion that covers the outer circumferential surface of the magnet wire core wire, and an end face protection portion that covers an end face of the magnet wire core wire , the end face protection portion has an integral layer portion that is integral with the outer circumferential protection portion, and the integral layer portion is a portion where the outer circumferential protection portion is extended to the end face of the magnet wire core wire .

In addition, a compressor according to one aspect of the present disclosure is a compressor used in a refrigeration cycle device including a refrigerant circuit in which a refrigerant that generates a substance that promotes metal deterioration circulates, the compressor having a compression mechanism unit that compresses the refrigerant. and a motor that has a stator and a rotor and drives the compression mechanism, the stator has a stator core that has a plurality of teeth, and a magnet wire that is wound around the teeth. has a magnet wire core wire that is a conductor, an outer peripheral protection part that covers the outer peripheral surface of the magnet wire core wire, and an end face protection part that covers the end face of the magnet wire core wire, and the end face protection part is integral with the outer peripheral protection part. It has a layer part, and the integral layer part is a part where the outer peripheral protection part is extended to the end surface of the magnet wire core wire .

Furthermore, a motor according to one embodiment of the present disclosure is a motor possessed by a compressor used in a refrigeration cycle device equipped with a refrigerant circuit in which a refrigerant that produces substances that accelerate metal deterioration circulates, and includes a rotor and a stator, the stator having a stator core having a plurality of teeth and a magnet wire wound around the teeth, the magnet wire having a magnet wire core wire which is a conductor, an outer circumferential protection portion covering the outer circumferential surface of the magnet wire core wire, and an end face protection portion covering an end face of the magnet wire core wire , the end face protection portion having an integral layer portion that is integral with the outer circumferential protection portion, and the integral layer portion being a portion in which the outer circumferential protection portion is extended to the end face of the magnet wire core wire .

Further, a stator according to one aspect of the present disclosure is a stator of a motor included in a compressor used in a refrigeration cycle device including a refrigerant circuit in which a refrigerant that generates a substance that promotes metal deterioration circulates, The magnet wire has a stator core having a tooth portion and a magnet wire wound around the teeth portion, and the magnet wire has a magnet wire core wire that is a conductor, an outer peripheral protection portion that covers the outer peripheral surface of the magnet wire core wire, and an end surface of the magnet wire core wire. The end face protection part has an integral layer part that is integral with the outer peripheral protection part, and the integral layer part is a part where the outer peripheral protection part is extended to the end face of the magnet wire core wire. be .

Further, a method for manufacturing a stator according to one aspect of the present disclosure includes manufacturing a stator for a motor included in a compressor used in a refrigeration cycle device including a refrigerant circuit in which a refrigerant that generates a substance that accelerates metal deterioration circulates. The method includes a magnet wire winding step of winding a magnet wire around the teeth of a stator core, a cutting step of cutting the magnet wire performed after the magnet wire winding step, and a cutting step or after the cutting step. an end face protection part forming step which is performed simultaneously and forms an end face protection part covering the end face of the magnet wire core wire which is a conductor of the magnet wire , and the end face protection part forming step has an integral layer part forming step. , the cutting step and the integral layer forming step are performed simultaneously, and in the cutting step and the integral layer forming step, the inclined surface portion forming a surface inclined with respect to the length direction of the magnet wire and the tip of the inclined surface portion. Using a cutter having a cutting edge part, the cutting edge part is pressed against the magnet wire core wire and the outer peripheral protection part that covers the outer peripheral surface of the magnet wire core wire, and while cutting, the inclined surface part is pressed against the outer peripheral protection part to cut the magnet wire core wire. By stretching the outer periphery protection part on the cut surface, an integral layer part which is an end face protection part and is integral with the outer periphery protection part is formed .

A refrigeration cycle device, a compressor, a motor, and a stator according to one aspect of the present disclosure have the effect of suppressing deterioration of a core wire of a magnet wire due to a substance generated from a refrigerant that promotes deterioration of metal.

In addition, the method for manufacturing a stator according to one embodiment of the present disclosure has the effect of being able to manufacture a stator that suppresses deterioration of the core wire of the magnet wire due to substances that promote deterioration of metals produced from the refrigerant.

1 is a configuration diagram of a refrigerator that is an example of a refrigeration cycle device according to a first embodiment; FIG. 1 is a configuration diagram of an air conditioner that is an example of a refrigeration cycle device according to Embodiment 1. FIG. 1 is a configuration diagram of an air conditioner using a refrigerant and a heat medium, which is an example of a refrigeration cycle device according to a first embodiment. 2 is a cross-sectional view taken along a cross section parallel to the axial direction of a main shaft of a motor of the compressor according to the first embodiment. FIG. 5 is a cross-sectional view of the compressor according to the first embodiment taken along line AA of FIG. 4. FIG. 3 is a first top view of the stator according to the first embodiment. FIG. 4 is a second top view of the stator according to the first embodiment. 1 is a front view of a stator according to Embodiment 1. FIG. 4 is a front view of the upper insulator according to the first embodiment, as viewed from the outer periphery of the stator. FIG. 4 is a side view of the upper insulator according to the first embodiment. FIG. FIG. 3 is a front view of the lower insulator according to Embodiment 1, viewed from the outer circumferential direction of the stator. FIG. 4 is a side view of a lower insulator according to the first embodiment. FIG. 2 is a cross-sectional view of the end of the magnet wire according to Embodiment 1, cut parallel to the length direction. 3 is a front view of the insulation displacement terminal according to the first embodiment, as viewed from the outer periphery of the stator; FIG. FIG. 3 is an enlarged view of a first restraint part and a second restraint part of the stator according to Embodiment 1; FIG. 2 is an electrical circuit diagram of the stator according to the first embodiment. FIG. 4 is a flowchart of a method for manufacturing a stator according to the first embodiment. FIG. 3 is a side view showing the stator immediately after step S3 of the stator manufacturing method according to the first embodiment is performed. 7 is a side view showing details of step S7 of the stator manufacturing method according to the first embodiment. FIG. 11A to 11C are diagrams illustrating details of a cutting step in the manufacturing method of the stator according to the comparative example. FIG. 7 is a cross-sectional view of the end of the magnet wire cut in the cutting step of the stator manufacturing method according to the comparative example, cut in parallel to the length direction. A cross-sectional view of an end of a magnet wire according to a modified example of embodiment 1 cut parallel to the longitudinal direction. FIG. 11 is a flowchart of a method for manufacturing a stator according to a modified example of the first embodiment. FIG. 7 is a cross-sectional view of the end of the magnet wire according to Embodiment 2, cut parallel to the length direction. 7 is a flowchart diagram of a method for manufacturing a stator according to a second embodiment. FIG. 13 is an enlarged view of a first restraining portion and a second restraining portion of a stator according to a modified example of the second embodiment. FIG. A cross-sectional view of an end of a magnet wire according to embodiment 3 cut parallel to the longitudinal direction. FIG. 11 is a flowchart of a method for manufacturing a stator according to the third embodiment.

A refrigeration cycle device and a compressor according to an embodiment of the present disclosure will be described based on the drawings. Note that the present disclosure is not limited to the following embodiments, and may be modified or omitted without departing from the spirit of the present disclosure. In addition, common elements in each figure are given the same reference numerals, and redundant explanations will be omitted.

Embodiment 1.
FIG. 1 is a configuration diagram of a refrigerator that is an example of a refrigeration cycle device according to a first embodiment. As an example of a refrigeration cycle device, the configuration of a refrigerator 100, which is a device for storing things at low temperatures, such as a showcase, a refrigerator, or a freezer compartment, will be described with reference to FIG. The refrigerator 100 includes a compressor 101 , a condenser 102 , a pressure reducing device 103 , an evaporator 104 , and a refrigerant pipe 105 . Further, the compressor 101 , the condenser 102 , the pressure reducing device 103 , and the evaporator 104 are connected in an annular manner by a refrigerant pipe 105 . Therefore, a refrigerant circuit is formed in which refrigerant circulates through the compressor 101, condenser 102, pressure reducing device 103, and evaporator 104 in sequence.

The compressor 101 has a discharge port 101a and a suction port 101b, and compresses the refrigerant sucked in through the suction port 101b into a high-temperature, high-pressure gas state and discharges it from the discharge port 101a.

Condenser 102 has a flow path formed inside that connects inlet 102a and outlet 102b, and heat exchange occurs between the refrigerant passing through the flow path and the heating side heat medium. The heating side heat medium is a heat medium that exchanges heat with the refrigerant passing through the flow path in condenser 102. In addition, in refrigerator 100, condenser 102 is provided in a space different from the space in which objects are stored. Therefore, in refrigerator 100, the heating side heat medium is air in a space different from the space in which objects are stored.

The pressure reducing device 103 reduces the pressure of the refrigerant passing through it. For example, an electronic expansion valve or a capillary tube may be used as the pressure reducing device 103.

Evaporator 104 has a flow path formed inside that connects inlet 104a and outlet 104b, and heat exchange occurs between the refrigerant passing through the flow path and the cooling side heat medium. The cooling side heat medium is a heat medium that exchanges heat with the refrigerant passing through the flow path in evaporator 104. In addition, in refrigerator 100, evaporator 104 is provided in the same space as the space in which the object is stored. Therefore, in refrigerator 100, the cooling side heat medium is the air in the space in which the object is stored.

The refrigerant pipe 105 includes a first refrigerant pipe 105a, a second refrigerant pipe 105b, a third refrigerant pipe 105c, and a fourth refrigerant pipe 105d. The first refrigerant pipe 105a connects the discharge port 101a of the compressor 101 and the inlet port 102a of the condenser 102. The second refrigerant pipe 105b connects the outlet 102b of the condenser 102 and the pressure reducing device 103. The third refrigerant pipe 105c connects the pressure reducing device 103 and the inlet 104a of the evaporator 104. The fourth refrigerant pipe 105d connects the outlet 104b of the evaporator 104 and the inlet 101b of the compressor 101.

Refrigerant circulating in the refrigerant circuit produces substances that accelerate the deterioration of metals. In Embodiment 1, the refrigerant includes trifluoroiodomethane. For example, a single refrigerant of trifluoroiodomethane may be used, or a mixed refrigerant in which other refrigerants and trifluoroiodomethane are mixed may be used. Furthermore, the refrigerant may or may not have additives added thereto. Trifluoroiodomethane has an extremely low GWP of 0.4, and is classified as nonflammable in ISO 817:2014. Therefore, by including trifluoroiodomethane, the refrigerant can have characteristics of low GWP and low flammability. Note that since the refrigerant of Embodiment 1 contains trifluoroiodomethane, hydrogen iodide is generated as a substance that accelerates metal deterioration.

Furthermore, it is desirable for the refrigerant to have a GWP of 750 or less. A GWP of 750 or less is an environmentally friendly refrigerant and is highly compliant with legal regulations. In addition, a refrigerant with a GWP of 750 or less can be used not only in refrigerators as refrigeration cycle devices, but also in air conditioners, which will be described later. The GWP is the value (100-year value) from the Fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC). In addition, the GWP of a refrigerant not listed in AR5 may be a value listed in other publicly known documents, or a value calculated or measured using a publicly known method.

Furthermore, the refrigerant is desirably a refrigerant classified as non-flammable in the flammability category according to ISO 817:2014. Refrigerants classified as non-flammable require means, equipment, or structure for diffusing refrigerant leaked into the refrigeration cycle equipment, a sensor for detecting refrigerant leakage, and an alarm device that issues an alarm when the sensor detects refrigerant leakage. There is no need to provide Furthermore, refrigerants classified as non-flammable can be used even in areas where the use of flammable refrigerants is not permitted under legal regulations.

Further, the refrigerant is preferably a mixed refrigerant of HFC32, HFC125, and trifluoroiodomethane. By including HFC32, high refrigeration capacity and high energy efficiency can be ensured. Furthermore, by including HFC125, it is possible to reduce the temperature gradient, which is the temperature difference between the start temperature and the end temperature of the phase change of the refrigerant. Therefore, the mixed refrigerant of HFC32, HFC125, and trifluoroiodomethane can have low GWP and low flammability. Furthermore, by using the mixed refrigerant, a refrigeration cycle device with excellent refrigeration capacity and energy efficiency can be obtained.

In particular, it is more desirable that the mixed refrigerant contains 39.5 wt % or less of trifluoroiodomethane. In addition, the number below two decimal places of the weight ratio of trifluoroiodomethane shall be rounded up.

Among them, it is more preferable that the mixed refrigerant contains 49 wt% HFC32, 11.5 wt% R125, and 39.5 wt% trifluoroiodomethane. A mixed refrigerant with this composition has a GWP of 733 and is classified as non-flammable.

Next, the flow of refrigerant flowing through the refrigerant circuit formed in the refrigerator 100 will be described. The high-temperature, high-pressure gas-state refrigerant discharged from the discharge port 101a of the compressor 101 passes through the first refrigerant pipe 105a and flows into the internal flow path of the condenser 102 from the inlet 102a. The refrigerant passing through the internal flow path of the condenser 102 is cooled by the heating side heat medium. In other words, the heating side heat medium is heated by the refrigerant passing through the internal flow path of the condenser 102. The refrigerant cooled in the condenser 102 becomes a low-temperature, high-pressure liquid state and flows out of the condenser 102 from the outlet 102b. The refrigerant flowing out of the condenser 102 flows into the pressure reducing device 103 through the second refrigerant pipe 105b. The low-temperature, high-pressure liquid refrigerant that flows into the pressure reducing device 103 is decompressed and flows out of the pressure reducing device 103 in a low-temperature, low-pressure, gas-liquid two-phase state. The refrigerant flowing out of the pressure reducing device 103 flows into the flow path inside the evaporator 104 from the inlet 104a via the third refrigerant pipe 105c. The refrigerant passing through the flow path inside the evaporator 104 is heated by the cooling-side heat medium. In other words, the cooling-side heat medium is cooled by the refrigerant passing through the flow path inside the evaporator 104. The refrigerant heated in the evaporator 104 becomes a high-temperature, low-pressure gas state and flows out of the evaporator 104 from the outlet 104b. The refrigerant flowing out of the evaporator 104 is sucked into the inside of the compressor 101 from the suction port 101b of the compressor 101 via the fourth refrigerant pipe 105d. The refrigerant sucked into the inside of the compressor 101 becomes a high-temperature, high-pressure gas state again and is discharged from the discharge port 101a. In this way, the refrigerant flows through the refrigerant circuit, and the cooling-side heat medium is cooled. In other words, the air in the space where the object is stored is cooled, and the object can be stored at a low temperature.

Figure 2 is a configuration diagram of an air conditioner, which is an example of a refrigeration cycle device according to the first embodiment. The configuration of an air conditioner 200 that performs air conditioning in a building as an example of a refrigeration cycle device will be described with reference to Figure 2. The air conditioner 200 includes a compressor 201, an outdoor heat exchanger 202, a pressure reducing device 203, an indoor heat exchanger 204, a flow path switching device 205, and a refrigerant piping 206. The compressor 201, the outdoor heat exchanger 202, the pressure reducing device 203, the indoor heat exchanger 204, and the flow path switching device 205 are connected in a ring shape by the refrigerant piping 206. For this reason, a refrigerant circuit is formed in which the refrigerant circulates through the compressor 201, the outdoor heat exchanger 202, the pressure reducing device 203, the indoor heat exchanger 204, and the flow path switching device 205 in sequence. The compressor 201 and the pressure reducing device 203 are similar to the compressor 101 and the pressure reducing device 103 described above, and therefore will not be described. Moreover, the refrigerant flowing through the refrigerant circuit of the air conditioner 200 is similar to the refrigerant flowing through the above-mentioned refrigerator 100, and therefore a description thereof will be omitted.

The outdoor heat exchanger 202 has a flow path connecting a first connection port 202a and a second connection port 202b formed therein, and heat is transferred between the refrigerant passing through the flow path and the air outside the building. Let the exchange take place.

The indoor heat exchanger 204 has a flow path formed therein connecting the first connection port 204a and the second connection port 204b, and performs heat exchange between the refrigerant passing through the flow path and the air inside the building.

The flow path switching device 205 switches the flow direction of the refrigerant flowing through the refrigerant circuit. Specifically, the flow path switching device 205 is a four-way valve having four ports: port a, port b, port c, and port d.

The refrigerant piping 206 is composed of a first refrigerant piping 206a, a second refrigerant piping 206b, a third refrigerant piping 206c, a fourth refrigerant piping 206d, a fifth refrigerant piping 206e, and a sixth refrigerant piping 206f. The first refrigerant piping 206a connects the discharge port 201a of the compressor 201 to the a port of the flow path switching device 205. The second refrigerant piping 206b connects the b port of the flow path switching device 205 to the first connection port 202a of the outdoor heat exchanger 202. The third refrigerant piping 206c connects the second connection port 202b of the outdoor heat exchanger 202 to the pressure reducing device 203. The fourth refrigerant piping 206d connects the pressure reducing device 203 to the first connection port 204a of the indoor heat exchanger 204. The fifth refrigerant pipe 206e connects the second connection port 204b of the indoor heat exchanger 204 and the c port of the flow path switching device 205. The sixth refrigerant pipe 206f connects the d port of the flow path switching device 205 and the suction port 201b of the compressor 201.

Next, the flow of the refrigerant flowing through the refrigerant circuit formed in the air conditioner 200 will be explained. In the air conditioner 200, the flow path switching device 205 forms two types of refrigerant circuits: a refrigerant circuit for cooling and a refrigerant circuit for heating.

The flow of refrigerant flowing through the refrigerant circuit during cooling will be explained. In the refrigerant circuit during cooling, the flow path switching device 205 is in a state where the a port and b port are connected and the c port and d port are connected, as shown by the solid line in FIG. The high-temperature, high-pressure gaseous refrigerant discharged from the discharge port 201a of the compressor 201 passes through the first refrigerant pipe 206a, the flow path switching device 205, and the second refrigerant pipe 206b, and is discharged outdoors from the first connection port 202a. It flows into the flow path inside the heat exchanger 202. The refrigerant passing through the flow path inside the outdoor heat exchanger 202 is cooled by outdoor air. In other words, the outdoor heat exchanger 202 plays the role of a condenser in the refrigerant circuit during cooling. The refrigerant cooled by the outdoor heat exchanger 202 becomes a low-temperature, high-pressure liquid state and flows out of the outdoor heat exchanger 202 from the second connection port 202b. The refrigerant flowing out of the outdoor heat exchanger 202 flows into the pressure reducing device 203 via the third refrigerant pipe 206c. The low temperature, high pressure, liquid state refrigerant that has flowed into the pressure reducing device 203 is depressurized, becomes a low temperature, low pressure, gas-liquid two-phase state, and flows out from the pressure reducing device 203. The refrigerant flowing out of the pressure reducing device 203 flows into the flow path inside the indoor heat exchanger 204 from the first connection port 204a via the fourth refrigerant pipe 206d. The refrigerant passing through the flow path inside the indoor heat exchanger 204 is heated by the indoor air. In other words, the indoor air is cooled by the refrigerant passing through the flow path inside the indoor heat exchanger 204. In other words, the indoor heat exchanger 204 plays the role of an evaporator in the refrigerant circuit during cooling. The refrigerant heated in the indoor heat exchanger 204 becomes a high temperature, low pressure gas state and flows out of the indoor heat exchanger 204 from the second connection port 204b. The refrigerant flowing out from the indoor heat exchanger 204 is sucked into the compressor 201 from the suction port 201b of the compressor 201 via the fifth refrigerant pipe 206e, the flow path switching device 205, and the sixth refrigerant pipe 206f. The refrigerant sucked into the compressor 201 becomes a high-temperature, high-pressure gas again and is discharged from the discharge port 201a. As the refrigerant flows through the refrigerant circuit in this manner, indoor air is cooled and indoor air conditioning can be performed.

The flow of refrigerant through the refrigerant circuit during heating will be explained. In the refrigerant circuit during heating, the flow path switching device 205 is in a state where the a port and c port are connected and the b port and d port are connected, as shown by the broken line in FIG. The high-temperature, high-pressure gaseous refrigerant discharged from the discharge port 201a of the compressor 201 passes through the first refrigerant pipe 206a, the flow path switching device 205, and the fifth refrigerant pipe 206e, and enters the room from the second connection port 204b. It flows into the flow path inside the heat exchanger 204. The refrigerant passing through the flow path inside the indoor heat exchanger 204 is cooled by indoor air. In other words, indoor air is heated by the refrigerant passing through the flow path inside the indoor heat exchanger 204. In other words, the indoor heat exchanger 204 plays the role of a condenser in the refrigerant circuit during heating. The refrigerant cooled by the indoor heat exchanger 204 becomes a low-temperature, high-pressure liquid state and flows out of the indoor heat exchanger 204 from the first connection port 204a. The refrigerant flowing out of the indoor heat exchanger 204 flows into the pressure reducing device 203 via the fourth refrigerant pipe 206d. The low temperature, high pressure, liquid state refrigerant that has flowed into the pressure reducing device 203 is depressurized, becomes a low temperature, low pressure, gas-liquid two-phase state, and flows out from the pressure reducing device 203. The refrigerant flowing out of the pressure reducing device 203 flows into the flow path inside the outdoor heat exchanger 202 from the second connection port 202b via the third refrigerant pipe 206c. The refrigerant passing through the flow path inside the outdoor heat exchanger 202 is heated by the outdoor air. In other words, the outdoor heat exchanger 202 plays the role of an evaporator in the refrigerant circuit during heating. The refrigerant heated by the outdoor heat exchanger 202 becomes a high-temperature, low-pressure gas state and flows out of the outdoor heat exchanger 202 from the first connection port 202a. The refrigerant flowing out of the outdoor heat exchanger 202 is sucked into the compressor 201 from the suction port 201b of the compressor 201 via the second refrigerant pipe 206b, the flow path switching device 205, and the sixth refrigerant pipe 206f. The refrigerant sucked into the compressor 201 becomes a high-temperature, high-pressure gas again and is discharged from the discharge port 201a. As the refrigerant flows through the refrigerant circuit in this manner, indoor air is heated and indoor air conditioning can be performed.

FIG. 3 is a configuration diagram of an air conditioner using a refrigerant and a heat medium, which is an example of a refrigeration cycle device according to the first embodiment. As an example of a refrigeration cycle device, the configuration of an air conditioner 300 that performs air conditioning in a building using an intermediate heat medium will be described with reference to FIG. 3. The air conditioner 300 includes a compressor 301, an outdoor heat exchanger 302, a pressure reducing device 303, a refrigerant heat medium heat exchanger 304, a flow path switching device 305, a refrigerant pipe 306, an indoor heat exchanger 307, a pump 308, and a heat medium. and piping 309. Further, the compressor 301 , the outdoor heat exchanger 302 , the pressure reducing device 303 , the refrigerant heat medium heat exchanger 304 , and the flow path switching device 305 are connected in an annular manner by the refrigerant pipe 306 . Therefore, a refrigerant circuit is formed in which the refrigerant circulates through the compressor 301, the outdoor heat exchanger 302, the pressure reducing device 303, the refrigerant heat medium heat exchanger 304, and the flow path switching device 305 in this order. Further, the refrigerant/heat medium heat exchanger 304 , the indoor heat exchanger 307 , and the pump 308 are connected in an annular manner by the heat medium piping 309 . Therefore, a heat medium circuit is formed in which the heat medium circulates through the refrigerant/heat medium heat exchanger 304, the indoor heat exchanger 307, and the pump 308 in sequence. Note that the compressor 301, outdoor heat exchanger 302, pressure reducing device 203, and flow path switching device 305 are the same as the compressor 101, outdoor heat exchanger 202, pressure reducing device 103, and flow path switching device 205 described above. , the explanation is omitted. The refrigerant that flows through the refrigerant circuit of the air conditioner 300 is the same as the refrigerant that flows through the refrigerator 100 described above, so a description thereof will be omitted.

The refrigerant-to-heat medium heat exchanger 304 has a refrigerant flow path connecting the first refrigerant side connection port 304a and the second refrigerant side connection port 304b, and a heat medium flow path connecting the first heat medium side connection port 304c and the second heat medium side connection port 304d. The refrigerant-to-heat medium heat exchanger 304 exchanges heat between the refrigerant flowing through the refrigerant flow path and the heat medium flowing through the heat medium flow path.

The refrigerant piping 306 is composed of a first refrigerant piping 306a, a second refrigerant piping 306b, a third refrigerant piping 306c, a fourth refrigerant piping 306d, a fifth refrigerant piping 306e, and a sixth refrigerant piping 306f. The fourth refrigerant piping 306d connects the pressure reducing device 203 and the first refrigerant side connection port 304a of the refrigerant-to-heat medium heat exchanger 304. The fifth refrigerant piping 306e connects the second refrigerant side connection port 304b of the refrigerant-to-heat medium heat exchanger 304 and the c port of the flow switching device 205. Note that the first refrigerant piping 306a, the second refrigerant piping 306b, the third refrigerant piping 306c, and the sixth refrigerant piping 306f are the same as the first refrigerant piping 206a, the second refrigerant piping 206b, the third refrigerant piping 206c, and the sixth refrigerant piping 206f described above, so their explanations will be omitted.

The indoor heat exchanger 307 has a flow path formed therein connecting the first connection port 307a and the second connection port 307b, and heat exchange is performed between the heat medium passing through the flow path and the air inside the building.

The pump 308 includes a discharge port 308a and a suction port 308b, sucks the heat medium through the suction port 308b, and discharges the sucked heat medium through the discharge port 308a.

The heat medium piping 309 is composed of a first heat medium piping 309a, a second heat medium piping 309b, and a third heat medium piping 309c. The first heat medium piping 309a connects the discharge port 308a of the pump 308 and the first heat medium side connection port 304c of the refrigerant-to-heat medium heat exchanger 304. The second heat medium piping 309b connects the second heat medium side connection port 304d of the refrigerant-to-heat medium heat exchanger 304 and the first connection port 204a of the indoor heat exchanger 307. The third heat medium piping 309c connects the second connection port 204b of the indoor heat exchanger 307 and the suction port 308b of the pump 308.

As the heat medium circulating in the heat medium circuit, a heat medium that exchanges heat in a liquid state in the refrigerant/heat medium heat exchanger 304 and the indoor heat exchanger 307 is used. For example, brine (antifreeze), water, a mixture of brine and water, or a mixture of water and an additive having a high anticorrosion effect can be used as the heat medium.

Next, the flow of the refrigerant flowing through the refrigerant circuit formed in the air conditioner 300 will be explained. In the air conditioner 300, similarly to the air conditioner 200, the flow path switching device 305 forms two types of refrigerant circuits: a refrigerant circuit for cooling and a refrigerant circuit for heating.

The flow of refrigerant flowing through the refrigerant circuit during cooling will be explained. In addition, an explanation of the connection state of the flow path switching device 305, an explanation of the process from when the refrigerant is discharged from the compressor 301 until it flows out from the pressure reducing device 303, and an explanation from when the refrigerant is sucked into the compressor 301 until it flows out from the compressor 301 again. The explanation up to discharge is the same as that of the air conditioner 200 except for the numbering of each component, so the explanation will be omitted. The refrigerant flowing out of the pressure reducing device 303 flows into the refrigerant flow path of the refrigerant/thermal medium heat exchanger 304 from the first refrigerant side connection port 304a via the fourth refrigerant pipe 306d. The refrigerant passing through the refrigerant flow path of the refrigerant-heat-medium heat exchanger 304 is heated by the heat medium passing through the heat-medium flow path of the refrigerant-heat-medium heat exchanger 304 . In other words, the heat medium passing through the heat medium flow path of the refrigerant-heat-medium heat exchanger 304 is cooled by the refrigerant passing through the refrigerant flow path of the refrigerant-heat-medium heat exchanger 304 . In other words, in the refrigerant circuit during cooling, the refrigerant/thermal medium heat exchanger 304 plays the role of an evaporator. The refrigerant heated in the refrigerant-heat-medium heat exchanger 304 becomes a high-temperature, low-pressure gas state and flows out of the refrigerant-heat-medium heat exchanger 304 from the second refrigerant side connection port 304b.

The flow of the refrigerant flowing through the refrigerant circuit during heating will be described. The connection state of the flow path switching device 305 and the description of the refrigerant from when it flows into the pressure reducing device 303 to when it is discharged again from the compressor 301 are the same as those of the air conditioner 200 except for the numbering of each component, so the description will be omitted. The high-temperature, high-pressure gaseous refrigerant discharged from the discharge port 301a of the compressor 301 passes through the first refrigerant piping 306a, the flow path switching device 305, and the fifth refrigerant piping 306e and flows into the refrigerant flow path of the refrigerant-to-heat medium heat exchanger 304 from the second refrigerant side connection port 304b. The refrigerant passing through the refrigerant flow path of the refrigerant-to-heat medium heat exchanger 304 is cooled by the heat medium passing through the heat medium flow path of the refrigerant-to-heat medium heat exchanger 304. In other words, the heat medium passing through the heat medium flow path of the refrigerant-to-heat medium heat exchanger 304 is heated by the refrigerant passing through the refrigerant flow path of the refrigerant-to-heat medium heat exchanger 304. In other words, in the refrigerant circuit during heating, the refrigerant-to-heat medium heat exchanger 304 functions as a condenser. The refrigerant cooled in the refrigerant-to-heat medium heat exchanger 304 becomes a low-temperature, high-pressure liquid state and flows out of the refrigerant-to-heat medium heat exchanger 304 from the first refrigerant-side connection port 304a.

Next, the flow of the heat medium flowing through the heat medium circuit formed in the air conditioner 300 will be explained. The heat medium discharged from the discharge port 308a of the pump 308 passes through the first heat medium pipe 309a and flows into the heat medium flow path of the refrigerant/heat medium heat exchanger 304 from the first heat medium side connection port 304c. . The heat medium passing through the heat medium flow path of the refrigerant-heat-medium heat exchanger 304 exchanges heat with the refrigerant passing through the refrigerant flow path of the refrigerant-heat-medium heat exchanger 304 . In other words, the heat medium passing through the heat medium flow path of the refrigerant heat medium heat exchanger 304 is cooled when the refrigerant circuit is a refrigerant circuit for cooling, and is cooled when the refrigerant circuit is a refrigerant circuit for heating. heated. The heat medium that has undergone heat exchange in the refrigerant-heat-medium heat exchanger 304 flows out of the refrigerant-heat-medium heat exchanger 304 from the second heat-medium side connection port 304d. The heat medium flowing out from the refrigerant-heat-medium heat exchanger 304 passes through the second heat medium pipe 309b and flows into the flow path inside the indoor heat exchanger 207 from the first connection port 207a. The refrigerant passing through the flow path inside the indoor heat exchanger 207 exchanges heat with indoor air. In other words, the refrigerant passing through the flow path inside the indoor heat exchanger 207 cools the indoor air when the refrigerant circuit is used for cooling, and cools the indoor air when the refrigerant circuit is used for heating. heats the indoor air. The heat medium that has undergone heat exchange in the indoor heat exchanger 207 flows out of the indoor heat exchanger 207 from the second connection port 207b. The heat medium flowing out of the indoor heat exchanger 207 passes through the third heat medium pipe 309c, is sucked in from the suction port 308b of the pump 308, and is discharged from the pump 308 again.

Figure 4 is a cross-sectional view taken along a cross section parallel to the axial direction of the main shaft of the motor of the compressor according to embodiment 1. Next, the compressor 1 used in the refrigeration cycle device according to the embodiment will be described with reference to Figure 4. The compressor 1 can be used as the compressor 101 of the refrigerator 100 shown in Figure 1, the compressor 201 of the air conditioner 200 shown in Figure 2, or the compressor 301 of the air conditioner 300 shown in Figure 3.

The compressor 1 includes a closed container 2, an accumulator 3, a motor 4, a main shaft 5, an upper bearing 6, a lower bearing 7, and a compression mechanism section 8. Moreover, these parts are metal parts formed from metal materials such as iron, copper, or aluminum.

The sealed container 2 houses the motor 4, main shaft 5, upper bearing 6, lower bearing 7, and compression mechanism 8, and constitutes the outer shell of the compressor 1. The sealed container 2 is also connected to a discharge pipe 9 and a connecting pipe 10. One end of the discharge pipe 9 corresponds to the discharge ports 101a, 201a, and 301a. The other end of the discharge pipe 9 is connected to the inside of the sealed container 2. One end of the connecting pipe 10 is connected to the compression mechanism 8 inside the sealed container 2, and the other end of the connecting pipe 10 is connected to the inside of the accumulator 3.

In addition, refrigeration oil is stored in the lower part of the sealed container 2. The part where this refrigeration oil is stored is called the oil storage section 11. Refrigeration oil is used for purposes such as reducing wear, regulating temperature, or improving sealing performance. In the compressor 1 according to embodiment 1, existing refrigeration oils such as polyol ester oil, polyvinyl ether oil, polyalkylene glycol oil, mineral oil, or mixtures thereof can be used as the refrigeration oil.

It is desirable that the moisture content of the refrigeration oil is 100 ppm by weight or less. By reducing the moisture content of the refrigeration oil to 100 ppm by weight or less, the deterioration of the refrigerant, the refrigeration oil, or metal parts due to moisture can be suppressed. The moisture content of the refrigeration oil can be reduced, for example, by drying the refrigeration oil, adjusting the atmosphere when filling the refrigeration oil, reducing the degree of vacuum applied to the refrigeration cycle device when filling the refrigeration oil, or installing a dryer or desiccant in the refrigeration cycle device. The moisture content of the refrigeration oil can be determined by collecting the refrigeration oil that is compatible with the refrigerant from inside the refrigeration cycle. The moisture content of the refrigeration oil can be measured in accordance with JIS K 2275-3:2015 "Crude oil and petroleum products - Determination of moisture - Part 3: Karl Fischer coulometric titration method".

Moreover, it is preferable to use polyvinyl ether oil as the refrigerating machine oil used in the compressor 1 according to the embodiment.

Further, it is preferable that the refrigerating machine oil used in the compressor 1 according to the first embodiment is a refrigerating machine oil to which alkylnaphthalene is added. Furthermore, it is more desirable that the refrigerating machine oil used in the compressor 1 according to the first embodiment is a refrigerating machine oil containing 4 wt % or more of alkylnaphthalene. Among these, it is more desirable that the refrigerating machine oil used in the compressor 1 according to the first embodiment is a polyvinyl ether oil containing 4 wt% or more and 20 wt% or less of alkylnaphthalene.

Alkylnaphthalene is a polycyclic aromatic hydrocarbon compound represented by the following chemical formula (1). Each of R ₁ to R ₈ represents an alkyl group or a hydrogen atom, and may be the same or different from each other. Further, physical properties such as viscosity and pour point vary depending on the structure of R ₁ to R ₈ . Although R ₁ to R ₈ may have any structure, it is desirable that they have excellent low-temperature fluidity.

The addition of alkylnaphthalene to the refrigerating machine oil has the effect of suppressing the production of hydrogen iodide caused by the cleavage of the CI bond of trifluoroiodomethane contained in the refrigerant. This effect is because the alkylnaphthalene captures the iodine radical by replacing the alkyl group or hydrogen atom of the alkylnaphthalene with the iodine radical generated by the cleavage of the CI bond of trifluoroiodomethane. In addition, when the refrigerant is a mixed refrigerant containing 39.5 wt% or less of trifluoroiodomethane, if the refrigerating machine oil contains 4 wt% or more of alkylnaphthalene, corrosion of the metal materials of the compressor 1 can be prevented. The generation of hydrogen iodide can be suppressed to a certain degree. Furthermore, if the refrigerant is a mixed refrigerant containing 49 wt% of HFC32, 11.5 wt% of R125, and 39.5 wt% of trifluoroiodomethane, the refrigerating machine oil contains alkylnaphthalene of 4 wt% or more and 20 wt%. % or less, the mixed refrigerant and refrigerating machine oil are compatible.

The sealed container 2 is provided with a power terminal 12 that electrically connects the inside and outside of the sealed container 2. The power supply terminal 12 is electrically connected to the power supply located outside the sealed container 2 and the motor 4 located inside the sealed container 2. Inside the sealed container 2, the motor 4 and the power terminal 12 are electrically connected via a lead wire 13, which is a conductor. That is, the motor 4 receives power from the power supply via the power terminal 12 and the lead wire 13. The lead wire 13 is a conductor that includes a lead wire core that is a conductor and a lead wire coating that is an insulating material that covers the outer periphery of the lead wire core. Examples of conductors used for the lead wire core include metals such as copper, aluminum, or conductive alloys. Examples of insulators used for the lead wire coating include resin materials such as PVC (polyvinyl chloride). The power supplied to the motor 4 of the compressor 1 according to the first embodiment is a three-phase AC that combines three systems of single-phase AC of U phase, V phase, and W phase. For this reason, three lead wires 13 are provided corresponding to the U-phase, V-phase, and W-phase, respectively.

The accumulator 3 stores surplus refrigerant generated in response to changes in load or operating conditions of the refrigeration cycle device. Further, the accumulator 3 is connected to a suction pipe 14 and a connecting pipe 10. One end of the suction pipe 14 corresponds to the suction ports 101b, 201b, and 301b. The other end of the suction pipe 14 is connected to the inside of the accumulator 3.

The motor 4 receives power from a power source to rotate the main shaft 5. The motor 4 has a rotor 41 and a stator 42, and is located above the upper bearing 6, the lower bearing 7, and the compression mechanism 8. The rotor 41 is a cylindrical part. The stator 42 is a ring-shaped part having an inner circumferential surface and an outer circumferential surface, with a hole in the center in which the rotor 41 is disposed. In other words, when the motor 4 is assembled, the rotor 41 and the stator 42 are arranged so that the side surface of the rotor 41 and the inner circumferential surface of the stator 42 face each other. Also, when the motor 4 is stored inside the sealed container 2, the outer circumferential surface of the stator 42 and the inner circumferential surface of the sealed container 2 are in contact with each other, and the motor 4 is fixed inside the sealed container 2. Details of the rotor 41 and the stator 42 will be described later. In addition, in the first embodiment, the motor 4 is a three-phase motor that receives power from a three-phase AC power source. In addition, the ring shape in this disclosure refers to a shape having a hole formed in the center, an inner circumferential surface facing the hole, and an outer circumferential surface behind the inner circumferential surface.

The main shaft 5 is fixed to the rotor 41 of the motor 4 and transmits the rotational force of the motor 4 to the compression mechanism 8. The main shaft 5 is a long, rod-shaped part, and is arranged so that the central axis of the main shaft 5 coincides with the rotation axis of the motor 4. The lower end of the main shaft 5 is immersed in refrigeration oil stored in the oil reservoir 11. In addition, an oil flow path (not shown) through which the refrigeration oil flows is formed inside the main shaft 5, and the refrigeration oil is sucked up from the oil reservoir 11 into the oil flow path during operation of the compressor 1.

The upper bearing 6 and the lower bearing 7 rotatably support the main shaft 5. Further, the refrigerating machine oil sucked up into the oil flow path is supplied to a location where the upper bearing 6 and the main shaft 5 slide and a location where the lower bearing 7 and the main shaft 5 slide. Further, the upper bearing 6 is located above the compression mechanism section 8, and the lower bearing 7 is located below the compression mechanism section 8.

The compression mechanism section 8 is driven by the rotational force of the motor 4 transmitted by the main shaft 5, and compresses the refrigerant that has flowed into the compression mechanism section 8. The compression mechanism section 8 according to the first embodiment is a rotary compression mechanism section having a cylinder and a rolling piston. The cylinder has a cylinder chamber which is a substantially circular space in a cross section perpendicular to the axial direction of the main shaft 5, and the rolling piston is arranged in the cylinder chamber. The cylinder chamber is formed with a discharge port that communicates with the inside of the closed container 2, and an intake port that is connected to one end of the connecting pipe 10. The rolling piston is fixed to the main shaft 5, and as the main shaft 5 rotates, the rolling piston performs an eccentric rotational movement. The space surrounded by the inner peripheral surface of the cylinder, the outer peripheral surface of the rolling piston, and the vanes becomes the compression chamber. The volume of the compression chamber changes as the rolling piston eccentrically rotates. Note that a compressor in which the compression mechanism section 8 includes a cylinder and a rolling piston, such as the compressor 1 according to Embodiment 1, is called a rotary compressor. In addition, the eccentric rotation motion refers to a motion in which an object revolves around the central axis of the main shaft 5 while rotating around the central axis of the object.

Next, the operation of compressor 1 according to the first embodiment to compress refrigerant will be described. First, when the rolling piston performs an eccentric rotational movement, the compression chamber and the suction port are brought into communication. When the compression chamber and the suction port are in communication, low-pressure gaseous refrigerant flows into the compression chamber via the suction pipe 14, the accumulator 3, and the connecting pipe 10. When the rolling piston performs an eccentric rotational movement from a state in which the compression chamber and the suction port are in communication, the compression chamber is no longer in communication with the suction port. When the rolling piston performs an eccentric rotational movement from a state where the compression chamber and the suction port are no longer in communication, the volume of the compression chamber is reduced and the refrigerant that has flowed into the compression chamber is compressed. Further, when the rolling piston performs an eccentric rotational movement, the compression chamber communicates with the discharge port. When the compression chamber is in communication with the discharge port, the high-pressure gas refrigerant compressed in the compression chamber flows into the closed container 2 . The high-pressure gaseous refrigerant that has flowed into the inside of the closed container 2 flows out of the closed container 2 through the discharge pipe 9. Further, a motor 4 is housed inside the sealed container 2, and the refrigerant inside the sealed container 2 passes through a gap formed between the rotor 41 and the stator 42 or a gap formed in the stator 42 itself. and flows out of the closed container 2 from the discharge pipe 9. Furthermore, when the rolling piston performs an eccentric rotational movement, the compression chamber is no longer communicated with the discharge port, and the compression chamber and the suction port are communicated again. This series of operations is performed while the rolling piston makes one rotation around the cylinder chamber, and by repeating this series of operations, the compressor 1 repeats suction of refrigerant, compression of the sucked refrigerant, and discharge of the compressed refrigerant.

Figure 5 is a cross-sectional view of the compressor according to embodiment 1 taken along the A-A section in Figure 4. Figure 6 is a first top view of the stator according to embodiment 1. Figure 7 is a second top view of the stator according to embodiment 1. Figure 8 is a front view of the stator according to embodiment 1. Next, the rotor 41 and stator 42 of the motor 4 will be described in detail. Note that, for the sake of explanation, the accumulator 3 is omitted from Figure 5. Also, for the sake of explanation, the lead wires 13, jumper wires 65 and crimp terminals 66 are omitted from Figures 7 and 8.

The rotor 41 has a rotor core 51 and a plurality of permanent magnets 52.

The rotor core 51 is constructed by laminating disk-shaped magnetic materials. Examples of the magnetic material used for the rotor core 51 include iron or an iron alloy. Further, the stacking direction of the magnetic members of the rotor core 51 is parallel to the direction along the rotation axis of the motor 4 (corresponding to the vertical direction in FIG. 4). The laminated disk-shaped magnetic materials are each fixed by caulking or welding, and the rotor core 51 is formed by the plurality of fixed disk-shaped magnetic materials. Further, a shaft insertion hole 53 and a plurality of magnet insertion holes 54 are formed in the rotor core 51 so as to penetrate in the stacking direction. The shaft insertion hole 53 is located at the center of the rotor core 51. Moreover, the rotor 41 and the main shaft 5 are fixed by press-fitting the main shaft 5 into the shaft insertion hole 53. The magnet insertion holes 54 are located near the radial outer peripheral surface of the rotor core 51 and are formed at predetermined intervals in the circumferential direction, into which the permanent magnets 52 are inserted.

The permanent magnet 52 generates a magnetic flux. Examples of magnets used for the permanent magnet 52 include rare earth magnets such as magnets whose main components are neodymium, iron, and boron, or magnets whose main components are samarium, iron, and nitrogen.

In addition, the rotor 41 in embodiment 1 has six permanent magnets 52, and magnet insertion holes 54 are formed in six locations.

The stator 42 includes a lead wire 13, a stator core 61, an upper insulator 62, a lower insulator 63, a magnet wire 64, a crossover wire 65, and a pressure contact terminal 66.

The stator core 61 is made of a magnetic material similarly to the rotor core 51. The stator core 61 includes a back yoke portion 67 that forms the outer circumferential surface of the stator 42 and a plurality of teeth portions 68 that protrude from the inner circumferential surface of the back yoke portion 67 toward the center of the stator 42 . Furthermore, the tips of the teeth portions 68 located on the center side of the stator 42 form the inner circumferential surface of the stator 42 . Further, the stator core 61 includes a plurality of split cores 69 each made of laminated plate-shaped magnetic materials. The number of divided cores 69 is the same as the number of teeth portions 68, and each divided core 69 has an arc-shaped back yoke portion 67 and a tooth portion 68. The back yoke portions 67 of the plurality of split iron cores 69 are arranged along the circumferential direction of the stator 42, and the circumferential end surfaces of the back yoke portions 67 that are adjacent in the circumferential direction are in contact with each other. Similarly to the rotor core 51, the product direction of the magnetic material of the split core 69 is parallel to the direction along the rotation axis of the motor 4 (corresponding to the vertical direction in FIG. 4). The laminated flat magnetic materials are fixed by caulking or welding, and the divided iron core 69 is formed by the plurality of fixed flat magnetic materials. Further, the split cores 69 arranged along the circumferential direction of the stator 42 are fixed by caulking or welding, and the stator core 61 is formed by the plurality of fixed split cores 69. In the stator 42 according to the first embodiment, the stator core 61 has nine teeth portions 68 and nine divided cores 69. The plurality of teeth portions 68 according to the first embodiment are individually referred to as first to ninth teeth portions 68a to 68i, and the divided iron cores 69 having the first to ninth teeth portions 68a to 68i are respectively referred to as first to ninth teeth portions 68a to 68i. They will be individually referred to as ninth divided cores 69a to 69i, and if it is necessary to individually describe each tooth portion 68 and each divided core 69, the individual names will be used. The number in the order or the subscript of the number that modifies a certain tooth portion 68 is the same as the number in the order or the subscript of the number that modifies the split core 69 having a certain tooth portion 68, for example, the first tooth portion 68a. The split core 69 having the above is the first split core 69a.

FIG. 9 is a front view of the upper insulator according to the first embodiment, viewed from the outer circumferential direction of the stator. FIG. 10 is a side view of the upper insulator according to the first embodiment. The upper insulator 62 is arranged at one end of the stator core 61 in a direction parallel to the rotation axis of the motor 4 (the upper end in FIG. 4 corresponds to this). Further, there are a plurality of upper insulators 62, and each of the upper insulators 62 is arranged in each of the divided iron cores 69. The upper insulator 62 has an upper back yoke insulating part 70 and an upper tooth insulating part 71. The upper back yoke insulating part 70 is in contact with the back yoke part 67 of the split core 69, and the upper teeth insulating part 71 is in contact with the tooth part 68. The upper insulator 62 is arranged so as to be in contact with the upper insulator 62 . The upper insulator 62 is made of an insulator and is located between the magnet wire 64 and the surface of one end of the stator core 61 in a direction parallel to the rotational axis of the motor 4 . Therefore, the upper insulator 62 insulates the magnet wire 64 from the surface on the one end side of the stator core 61 in a direction parallel to the rotation axis of the motor 4 . Examples of the insulator used for the upper insulator 62 include LCP (Liquid Crystal Polymer), ABS (Acrylonitrile butadiene styrene), and PBT (Polybutylene Terrephtal). ate: polybutylene terephthalate) and other resin molded products.

The upper back yoke insulating part 70 of the upper insulator 62 has a first restraining part 72 and a second restraining part 73. The first restraining part 72 has a first magnet wire restraining part 72a in which a groove into which the magnet wire 64 can be inserted is formed, and a first conductor restraining part 72b in which a groove into which the lead wire 13 or the jumper wire 65 can be inserted is formed. The second restraining part 73 has a second magnet wire restraining part 73a in which a groove into which the magnet wire 64 can be inserted is formed, and a second conductor restraining part 73b in which a groove into which the lead wire 13 or the jumper wire 65 can be inserted is formed. Furthermore, the first restraining part 72 and the second restraining part 73 can each have a pressure-displacement terminal 66 inserted therein. By inserting the pressure-displacement terminal 66 into the first restraining part 72 or the second restraining part 73, the lead wire 13, the magnet wire 64, or the jumper wire 65 inserted into the groove is restrained by the first restraining part 72 or the second restraining part 73.

FIG. 11 is a front view of the lower insulator according to the first embodiment, viewed from the outer circumferential direction of the stator. FIG. 12 is a side view of the lower insulator according to the first embodiment. The lower insulator 63 is arranged at the other end of the stator core 61 in the direction parallel to the rotation axis of the motor 4 (the lower end in FIG. 4 corresponds to this). Further, there are a plurality of lower insulators 63, and each of the lower insulators 63 is arranged in each of the divided iron cores 69. The lower insulator 63 has a lower back yoke insulating part 74 and a lower tooth insulating part 75. The lower back yoke insulating part 74 is in contact with the back yoke part 67 of the split core 69, and the lower tooth insulating part 75 is in contact with the back yoke part 67 of the split core 69. The lower insulator 63 is arranged such that the lower insulator 63 is in contact with the teeth portion 68 . The lower insulator 63 is made of an insulator and is located between the magnet wire 64 and the other end surface of the stator core 61 in a direction parallel to the rotational axis of the motor 4 . Therefore, the lower insulator 63 insulates the magnet wire 64 from the other end surface of the stator core 61 in a direction parallel to the rotation axis of the motor 4 . As with the upper insulator 62, the insulator used for the lower insulator 63 may be a resin molded product such as LCP, ABS, or PBT.

The magnet wire 64 will be explained using FIGS. 5 to 7. The magnet wire 64 is a linear member, and is wound around the teeth portions 68 of the stator core 61 via the upper insulator 62 and the lower insulator 63, respectively. The magnet wire 64 functions as a coil, and when a current flows through the magnet wire 64, the magnet wire 64 generates magnetic flux. In the stator 42 according to the first embodiment, each magnet wire 64 wound around each of the first to ninth teeth portions 68a to 68i is referred to as first to ninth magnet wires 64a to 64i. , if it is necessary to individually describe each magnet wire 64, the individual names will be used. The order number or number subscript that modifies a certain tooth portion 68 is the same as the order number or number subscript that modifies the magnet wire 64 wound around a certain tooth portion 68; for example, the first The magnet wire 64 wound around the teeth portion 68a is a first magnet wire 64a.

Further, one end of the magnet wire 64 is restrained by a first magnet wire restraining portion 72a of the upper insulator 62 provided on a core material 69 having teeth portions 68 around which the magnet wire 64 is wound. The other end of the magnet wire 64 is restrained by a second magnet wire restraint part 73a of the upper insulator 62 provided on a split core 69 having teeth parts 68 around which the magnet wire 64 is wound. That is, one end of the first magnet wire 64a wound around the first teeth portion 68a is restrained by the first magnet wire restraining portion 72a of the upper insulator 62 disposed on the first split iron core 69a. Ru. Further, the other end of the first magnet wire 64a wound around the first teeth portion 68a is restrained by a second magnet wire restraining portion 73a of the upper insulator 62 disposed on the first split core 69a. Ru. Note that the end portion of the magnet wire 64 refers to the portion from each end of the magnet wire 64 to the portion restrained by either the first magnet wire restraint part 72a or the second magnet wire restraint part 73a. .

Figure 13 is a cross-sectional view of the end of the magnet wire according to embodiment 1 cut parallel to the longitudinal direction. The magnet wire 64 also has a magnet wire core 80, an outer periphery protection portion 81, and an end face protection portion 82.

The magnet wire core 80 is a linear conductor. Examples of conductors used in the magnet wire core 80 include metals such as copper, aluminum, and conductive alloys. In this disclosure, "linear" refers to a long and thin shape like a line. In this disclosure, the direction corresponding to the length of the line in a linear member is referred to as the length direction, and the direction perpendicular to the length direction is referred to as the cross-sectional direction.

The outer periphery protection part 81 is provided over the length direction of the magnet wire 64 and covers the outer periphery of the magnet wire core wire 80 . The outer periphery protection portion 81 is an insulator. Further, the outer periphery protection portion 81 is made of a material that does not undergo deterioration caused by substances generated by the refrigerant that promote deterioration of metal. Examples of the material constituting the outer periphery protection portion 81 include resin materials such as polyamideimide and polyesterimide. Since the outer periphery protection portion 81 is an insulator, no current flows between the outer peripheries of the magnet wires 64 even if the outer peripheries of the magnet wires 64 come into contact with each other. The outer periphery protection part 81 according to the first embodiment is a film that covers the outer periphery of the magnet wire core wire 80, and includes the first layer outer periphery protection part 81a located closest to the outer periphery of the magnet wire 64, and the magnet wire core wire 80. It has a two-layer structure including a second layer outer periphery protection part 81b located between the first layer outer periphery protection part 81a. Further, the first layer outer periphery protection part 81a is made of polyamideimide, and the second layer outer periphery protection part 81b is made of polyesterimide.

The end face protection parts 82 are formed at both ends of the magnet wire 64 and cover the end faces of the magnet wire core wire 80. The end face protection part 82 according to the first embodiment is integrated with the outer circumference protection part 81. Therefore, the end face protection portion 82 according to the first embodiment is made of polyamideimide or polyesterimide. Further, the end face protection part 82 according to the first embodiment is formed by stretching a part of the outer periphery protection part 81 to the end face of the magnet wire core wire 80. Furthermore, the end face protection part 82 that is integral with the outer periphery protection part 81 is referred to as an integral layer part 82a. That is, in the stator 42 according to the first embodiment, the integral layer part 82a is formed as the end face protection part 82.

Since the magnet wire core wire 80 is covered by the outer periphery protection part 81 and the end face protection part 82, the magnet wire core wire 80 is configured to be difficult to come into contact with the refrigerant inside the closed container 2.

In addition, when the magnet wire 64 is restrained by the first magnet wire restraint portion 72a or the second magnet wire restraint portion 73a, the end face protection portion 82 of the magnet wire 64 faces the outer periphery of the back yoke portion 67. In other words, when the motor 4 is housed inside the sealed container 2, the end face protection portion 82 of the magnet wire 64 faces the inner wall of the sealed container 2.

The crossover wire 65 and the lead wire will be explained using FIG. 6. The crossover wire 65 is a conducting wire that electrically connects the magnet wires 64 wound around different teeth portions 68. Note that the crossover wire 65 of the stator 42 according to the first embodiment includes a crossover wire core wire that is a conductor and an insulating crossover wire coating that covers the outer periphery of the crossover wire core wire. Examples of the conductor used for the crossover core wire include metals such as copper, aluminum, and conductive alloys. Furthermore, examples of the insulator used for the crossover wire film include resin materials such as PVC. Note that the stator 42 according to the first embodiment has nine crossover wires 65.

Further, at the ends of the crossover wire 65, the crossover wire film is removed and the crossover core wire is exposed. The end portion of the crossover wire 65 with the exposed crossover wire core wire is inserted into the first conductor restraining portion 72b or the second conductor restraining portion 73b. Note that the end of the crossover wire 65 refers to a portion having a length of several mm to several hundred mm starting from the end.

The end of the lead wire 13 connected to the motor 4 has the lead wire coating removed to expose the lead core wire, similar to the end of the jumper wire 65. The end of the lead wire 13 with the exposed lead core wire is inserted into the first conductor restraint portion 72b or the second conductor restraint portion 73b. The end of the lead wire 13 refers to a portion having a length of several mm to several hundred mm starting from the end.

In addition, the ends of the lead wires 13 that are connected to the power supply terminal 12 are bundled together by a cluster 76. The cluster 76 can be fixed to the power supply terminal 12, and by fixing the cluster 76 to the power supply terminal 12, the lead wires 13 are electrically connected to the power supply terminal 12.

FIG. 14 is a front view of the stator of the pressure contact terminal according to Embodiment 1, viewed from the outer circumferential direction. The pressure contact terminal 66 is a component inserted into the first restraint part 72 or the second restraint part 73, and is made of a conductive metal piece. The pressure contact terminal 66 is provided with a first groove portion 66a and a second groove portion 66b, each having a groove formed therein. Further, the width of at least the first groove portion 66a is equal to or less than the diameter of the magnet wire core wire 80 of the magnet wire 64.

FIG. 15 is an enlarged view of the first restraint part and the second restraint part of the stator according to the first embodiment. A state in which the pressure contact terminal 66 is inserted into the first restraining portion 72 will be described. When the pressure contact terminal 66 is inserted into the first restraining portion 72, the outer circumferential protection portion 81 of the magnet wire 64 inserted into the first magnet wire restraint portion 72a is torn by the first groove portion 66a of the pressure contact terminal 66. , the pressure contact terminal 66 becomes wedged into the magnet wire core wire 80. Therefore, the magnet wire 64 inserted into the first magnet wire restraint part 72a is electrically connected to the pressure contact terminal 66 inserted into the first restraint part 72. Further, the lead wire 13 or the crossover wire 65 inserted into the first conductor restraint part 72b has a lead wire core wire or a crossover wire core wire exposed at the end inserted into the first conductor restraint part 72b. , the lead wire core wire or the crossover wire core wire contacts the second groove portion 66b of the pressure contact terminal 66. Therefore, the lead wire 13 or crossover wire 65 inserted into the first conductor restraint part 72b is electrically connected to the pressure contact terminal 66 inserted into the first restraint part 72. Therefore, the magnet wire 64 inserted into the first magnet wire restraint section 72a and the lead wire 13 or crossover wire 65 inserted into the first conductor wire restraint section 72b are electrically connected via the pressure contact terminal 66. . Note that FIG. 15 shows a case where the lead wire 13 is inserted into the first conductor restraining portion 72b.

In addition, in the portion where the outer protective portion 81 of the magnet wire 64 is broken by the insertion of the crimp terminal 66, the crimp terminal 66 covers the magnet wire core wire 80. Therefore, the magnet wire core wire 80 in the portion where the outer protective portion 81 is broken does not come into contact with the refrigerant inside the sealed container 2.

Similarly to the state in which the pressure contact terminal 66 is inserted into the second restraint part 73, the magnet inserted into the second magnet wire restraint part 73a is The wire 64 and the lead wire 13 or crossover wire 65 inserted into the second conductor restraining portion 73b are electrically connected via the pressure contact terminal 66. Note that FIG. 15 shows a case where the crossover wire 65 is inserted into the second conducting wire restraining portion 73b.

Figure 16 is an electrical circuit diagram of the stator according to embodiment 1. Next, the electrical circuit diagram of the stator 42 will be described. The electrical circuit diagram of the stator according to embodiment 1 is a star connection in which one end of each of the U phase, V phase, and W phase is connected at the neutral point 90.

Specifically, the first magnet wire 64a, the fourth magnet wire 64d, and the seventh magnet wire 64g are connected in series to form the U-phase coil group 91. That is, the lead wire 13 to which the U-phase power is supplied is restrained by the first conductor restraint portion 72b of the upper insulator 62 arranged on the first split core 69a. Also, one of the jumper wires 65 has one end restrained by the second conductor restraint portion 73b of the upper insulator 62 arranged on the first split core 69a, and the other end restrained by the first conductor restraint portion 72b of the upper insulator 62 arranged on the fourth split core 69d. Also, one of the jumper wires 65 has one end restrained by the second conductor restraint portion 73b of the upper insulator 62 arranged on the fourth split core 69d, and the other end restrained by the first conductor restraint portion 72b of the upper insulator 62 arranged on the seventh split core 69g. In addition, one of the crossover wires 65 has one end restrained by the second conductor restraint portion 73b of the upper insulator 62 arranged on the seventh split core 69g, and the other end connected to the neutral point 90.

The second magnet wire 64b, the fifth magnet wire 64e, and the eighth magnet wire 64h are connected in series to form a V-phase coil group 92. That is, the lead wire 13 to which V-phase power is supplied is restrained by the first conductor restraint portion 72b of the upper insulator 62 arranged on the second split core 69b. One end of one of the crossover wires 65 is restrained by the second conductor restraint portion 73b of the upper insulator 62 arranged on the second split core 69b, and the other end is restrained by the first conductor restraint portion 72b of the upper insulator 62 arranged on the fifth split core 69e. One end of one of the crossover wires 65 is restrained by the second conductor restraint portion 73b of the upper insulator 62 arranged on the fifth split core 69e, and the other end is restrained by the first conductor restraint portion 72b of the upper insulator 62 arranged on the eighth split core 69h. In addition, one of the jumper wires 65 has one end restrained by the second conductor restraint portion 73 b of the upper insulator 62 arranged on the eighth split core 69 h, and the other end connected to the neutral point 90 .

The third magnet wire 64c, the sixth magnet wire 64f, and the ninth magnet wire 64i are connected in series to form a W-phase coil group 93. That is, the lead wire 13 to which the W-phase power is supplied is restrained by the first conductor restraint portion 72b of the upper insulator 62 arranged on the third split core 69c. One end of one of the crossover wires 65 is restrained by the second conductor restraint portion 73b of the upper insulator 62 arranged on the third split core 69c, and the other end is restrained by the first conductor restraint portion 72b of the upper insulator 62 arranged on the sixth split core 69f. One end of one of the crossover wires 65 is restrained by the second conductor restraint portion 73b of the upper insulator 62 arranged on the sixth split core 69f, and the other end is restrained by the first conductor restraint portion 72b of the upper insulator 62 arranged on the ninth split core 69i. In addition, one of the crossover wires 65 has one end restrained by the second conductor restraint portion 73b of the upper insulator 62 arranged on the ninth split core 69i, and the other end connected to the neutral point 90.

FIG. 17 is a flowchart of the stator manufacturing method according to the first embodiment. Next, a method for manufacturing the stator 42 according to the first embodiment will be described.

First, in step S1, a lamination process is carried out. The lamination process is a process in which flat magnetic material is laminated to form the split core 69. In addition, immediately after the lamination process, the split core 69 is in a state in which the circumferential end faces of the adjacent back yoke parts 67 are not in contact with each other in the circumferential direction, and the split cores 69 are not fixed to each other.

After step S1 is completed, the process proceeds to step S2. In step S2, an insulator attachment process is performed. The insulator attaching process is a process of arranging the upper insulator 62 and the lower insulator 63 on the split core 69 formed in the lamination process. In the insulator mounting process, the upper insulator 62 is placed at one end of the split core 69 in a direction parallel to the rotation axis of the motor 4, and the lower insulator 63 is placed at one end of the split core 69 in a direction parallel to the rotation axis of the motor 4. located at the other end.

FIG. 18 is a side view showing the stator immediately after step S3 of the stator manufacturing method according to the first embodiment is performed. In addition, in FIG. 18, the divided iron core 69 is omitted, and a portion of the magnet wire 64 wound around the teeth portion 68 is shown in a cross-sectional view. After step S2 ends, the process advances to step S3. In step S3, a magnet wire winding process is performed. The magnet wire winding step is a step of winding the magnet wire 64 around the teeth portions 68 of the split core 69. Furthermore, the insulator mounting process is performed before the magnet wire winding process is performed. Therefore, an upper tooth insulating portion 71 or a lower tooth insulating portion 75 is located between the magnet wire 64 and the teeth portion 68.

In the magnet wire winding process, one end of the magnet wire 64 wound around the teeth 68 is inserted into a groove in a first magnet wire restraint portion 72a of the upper insulator 62 arranged on a split core 69 having the wound teeth 68. In the magnet wire winding process, the other end of the magnet wire 64 wound around the teeth 68 is inserted into a groove in a second magnet wire restraint portion 73a of the upper insulator 62 arranged on a split core 69 having the wound teeth 68.

Furthermore, immediately after the magnet wire winding step is performed, the magnet wire 64 is inserted into both ends of the magnet wire from the portion inserted into the groove of the first magnet wire restraint part 72a or the groove of the second magnet wire restraint part 73a. An extra portion 83 is provided that extends to the end of 64. The surplus portion 83 is located closer to the outer circumference of the upper back yoke insulating portion 70 than the groove of the first magnet wire restraining portion 72a or the groove of the second magnet wire restraining portion 73a. Further, the end face protection portion 82 is not formed on the end face of the magnet wire 64 immediately after the magnet wire winding process is performed, and the end face of the magnet wire core wire 80 is exposed.

In addition, by providing surplus portions 83 at both ends of the magnet wire 64 immediately after the magnet wire winding process is performed, the surplus portions 83 can be grasped. By grasping the surplus portions 83, the work performed in the magnet wire winding process, such as the work of winding the magnet wire around the teeth portion 68 or the work of inserting the end of the magnet wire 64 into the groove of the first magnet wire restraint portion 72a, can be easily performed.

After step S3 ends, the process proceeds to step S4. In step S4, a split core fixing process is performed. The split core fixing process is a process of arranging the split cores 69 in which the magnet wires 64 were wound around the teeth portions 68 in the magnet wire winding process in a ring shape, and fixing the split cores 69 to each other. In the split core fixing process, the split core 69 is fixed in a state where the circumferential end surfaces of circumferentially adjacent back yoke portions 67 are in contact with each other.

After step S4 ends, the process proceeds to step S5. In step S5, a wiring process is performed. The wiring process is a process of wiring the lead wires 13 and the crossover wires 65. In the wiring process, the end of the lead wire 13 on the motor 4 side and both ends of the crossover wire 65 are inserted into the groove of the first conductor restraint part 72b or the second conductor restraint part 73b so as to form the electric circuit shown in FIG. Insert into the groove.

After step S5 is completed, the process proceeds to step S6. In step S6, the crimp terminal insertion process is carried out. The crimp terminal insertion process is a process of inserting the crimp terminal 66 into the first restraint portion 72 or the second restraint portion 73. In addition, the magnet wire winding process and the wiring process are carried out before the crimp terminal insertion process. Therefore, by inserting the crimp terminal 66 into the first restraint portion 72 or the second restraint portion 73 in the crimp terminal insertion process, the end of the magnet wire 64 inserted into the groove of the first magnet wire restraint portion 72a or the groove of the second magnet wire restraint portion 73a, the end of the lead wire 13 on the motor 4 side inserted into the groove of the first conductor restraint portion 72b or the groove of the second conductor restraint portion 73b, and the end of the jumper wire 65 inserted into the groove of the first conductor restraint portion 72b or the groove of the second conductor restraint portion 73b are restrained.

After step S6 ends, the process advances to step S7. In step S7, the cutting process and the end face protection part forming process are performed simultaneously. The cutting step is a step of cutting the magnet wire 64 in order to cut off the surplus portions 83 provided at both ends of the magnet wire 64. Moreover, the end face protection part forming step is a process of forming the end face protection part 82 so as to cover the end face of the magnet wire core wire 80. Here, in the stator manufacturing method according to the first embodiment, since the integral layer part 82a is formed as the end face protection part 82, the end face protection part forming step of the stator 42 manufacturing method according to the first embodiment is performed as follows. It has an integral layer part forming step of forming an integral layer part 82a.

Figure 19 is a side view showing details of step S7 of the manufacturing method of the stator according to embodiment 1. In Figure 19, as in Figure 18, the split core 69 is omitted, and a part of the magnet wire 64 wound around the teeth portion 68 is shown in cross section. Specifically, in step S7, the excess portion 83 of the magnet wire 64 is cut by the cutter 1000. The cutter 1000 cuts the magnet wire 64 by moving in a cutting direction (a direction from the top to the bottom in Figure 19) that is perpendicular to the length direction of the magnet wire 64 (the left-right direction in Figure 19). The cutter 1000 is also configured with a cutting edge portion 1001, an inclined surface portion 1002, and a parallel surface portion 1003.

The cutting edge 1001 is the part where the tip of the inclined surface 1002 intersects with the tip of the parallel surface 1003, forming an acute angle.

The inclined surface portion 1002 is a portion that forms a surface that is inclined with respect to the cutting direction. The inclined surface portion 1002 also forms a surface that is inclined with respect to the length direction of the magnet wire 64. Here, the inclined surface in this disclosure refers to a surface that is not perpendicular or parallel to a predetermined direction, and the predetermined direction and the inclined surface form an acute angle that is greater than 0 degrees and less than 90 degrees. In other words, the inclined surface portion 1002 is a surface that is not perpendicular or parallel to the cutting direction and the length direction of the magnet wire 64. The inclined surface portion 1002 also faces the outer peripheral surface of the stator 42.

The parallel surface portion 1003 is a portion that forms a surface parallel to the cutting direction. The parallel surface portion 1003 is also a portion that forms a surface perpendicular to the longitudinal direction of the magnet wire 64. The parallel surface portion 1003 is also located on the back side of the inclined surface portion 1002.

When the cutter 1000 moves in the cutting direction in step S7, the cutting edge 1001 is pressed against the magnet wire 64, cutting the magnet wire core 80 and the outer periphery protection part 81. Also, while the cutting edge 1001 cuts the magnet wire core 80 and the outer periphery protection part 81, the inclined surface part 1002 is pressed against the outer periphery protection part 81 of the magnet wire 64 restrained by the first restraint part 72 or the second restraint part 73. A frictional force acts between the inclined surface part 1002 and the outer periphery protection part 81, and a part of the outer periphery protection part 81 is stretched to the cut surface of the magnet wire core 80 cut by the cutting edge part 1001. A part of the stretched outer periphery protection part 81 becomes the end face protection part 82 that covers the end face of the magnet wire core 80 as shown in FIG. 13. In this way, in step S7, the cutting process and the end face protection part forming process are performed simultaneously.

Figure 20 is a diagram showing details of the cutting process of the manufacturing method of the stator according to the comparative example. Figure 21 is a cross-sectional view of the end of the magnet wire cut in the cutting process of the manufacturing method of the stator according to the comparative example when it is cut parallel to the length direction. In addition, in Figure 20, as in Figure 19, the split core 69 is omitted, and a part wound around the teeth portion 68 of the magnet wire 64 is shown in a cross-sectional view. As a comparative example, an example of cutting the magnet wire 64 by the cutter 2000 will be described. The cutter 2000 has a cutting edge portion 2001, an inclined surface portion 2002, and a parallel surface portion 2003 formed in the same manner as the cutter 1000 according to the first embodiment, but unlike the cutter 1000 according to the first embodiment, the parallel surface portion 2003 faces the outer peripheral surface of the stator 42.

In the comparative example, when the cutter 2000 moves in the cutting direction (from the top to the bottom in FIG. 20), the cutting edge 2001 is pressed against the magnet wire 64, cutting the magnet wire core wire 80 and the outer periphery protection part 81. However, since the parallel surface portion 2003 is perpendicular to the length direction of the magnet wire 64, the parallel surface portion 2003 is a portion protecting the outer periphery of the magnet wire 64 restrained by the first restraining portion 72 or the second restraining portion 73. I can't press it against 81. Therefore, a frictional force sufficient to stretch the outer circumference protection part 81 does not act between the parallel surface part 2003 and the outer circumference protection part 81, and the end face protection part 82 is not formed. Therefore, in the comparative example, the end face of the magnet wire core wire 80 is exposed.

By performing the steps shown in FIG. 17 as described above, the stator 42 according to the first embodiment is manufactured.

As described above, the refrigeration cycle device according to the first embodiment includes a compressor 1 that compresses refrigerant, a condenser that condenses the refrigerant discharged from the compressor 1, and a pressure reducing device that reduces the pressure of the refrigerant flowing out from the condenser. , an evaporator that evaporates refrigerant whose pressure has been reduced by a pressure reducing device, and the refrigerant generates a substance that accelerates metal deterioration, and the compressor 1 includes a compression mechanism section 8 that compresses the refrigerant, a rotor 41, and a stator. The stator 42 has a stator core 61 having a plurality of teeth portions 68 and a magnet wire 64 wound around the teeth portions 68. However, the magnet wire 64 has a structure including a magnet wire core wire 80 that is a conductor, an outer periphery protection section 81 that covers the outer peripheral surface of the magnet wire core wire 80, and an end surface protection section 82 that covers the end surface of the magnet wire core wire 80. The refrigeration cycle device according to the first embodiment has a configuration in which the outer periphery protection portion 81 and the end face protection portion 82 prevent the magnet wire core wire 80 from coming into contact with the refrigerant. Therefore, in the refrigeration cycle device according to the first embodiment, even if a substance that accelerates metal deterioration is generated from the refrigerant, a reaction between the substance that accelerates metal deterioration and the magnet wire core wire 80 is unlikely to occur. Therefore, deterioration of the magnet wire core wire 80 caused by substances that promote metal deterioration can be suppressed. That is, in the refrigeration cycle device according to the first embodiment, the magnet wire 64 is a conductor, the magnet wire core wire 80, the outer periphery protection part 81 that covers the outer peripheral surface of the magnet wire core wire 80, and the end surface protection part that covers the end surface of the magnet wire core wire 80. 82 has the effect of suppressing deterioration of the magnet wire core wire 80 due to substances generated from the refrigerant that promote deterioration of metal.

Furthermore, the refrigeration cycle device according to the first embodiment has a configuration in which the end face protection part 82 has an integral layer part 82a that is integrated with the outer circumferential protection part 81 as an additional configuration. With the additional configuration, the refrigeration cycle device according to the first embodiment can suppress the formation of a gap between the outer periphery protection part 81 and the end face protection part 82, and can prevent the metal generated from the refrigerant from forming. This has the effect of further suppressing deterioration of the magnet wire core wire 80 due to substances that promote deterioration.

Furthermore, the refrigeration cycle device according to embodiment 1 has, as an additional configuration, a configuration in which the integral layer portion 82a is a portion in which the outer peripheral protection portion 81 is extended to the end face of the magnet wire core wire 80. With this additional configuration, the refrigeration cycle device according to embodiment 1 can simultaneously perform the process of forming the integral layer portion 82a of the end face protection portion 82 and the process of cutting the magnet wire 64, thereby achieving the effect of shortening the manufacturing process.

Furthermore, the refrigeration cycle device according to the first embodiment has an additional configuration in which the refrigerant is a refrigerant containing trifluoroiodomethane. With this additional configuration, in the refrigeration cycle device according to the first embodiment, hydrogen iodide is generated as a substance that accelerates the deterioration of metals more than the refrigerant. However, in the refrigeration cycle device according to the first embodiment, the magnet wire 64 has a magnet wire core wire 80 that is a conductor, an outer periphery protection portion 81 that covers the outer peripheral surface of the magnet wire core wire 80, and an end surface protection portion that covers the end surface of the magnet wire core wire 80. 82, it is possible to suppress deterioration of the magnet wire core wire 80 due to hydrogen iodide generated from the refrigerant.

The compressor 1 according to the first embodiment is a compressor 1 used in a refrigeration cycle device having a refrigerant circuit in which a refrigerant that produces a substance that accelerates metal deterioration circulates, and includes a compression mechanism 8 that compresses the refrigerant, and a motor 4 having a rotor 41 and a stator 42 and driving the compression mechanism 8. The stator 42 includes a stator core 61 having a plurality of teeth 68 and a magnet wire 64 wound around the teeth 68. The magnet wire 64 includes a magnet wire core 80 that is a conductor, an outer periphery protection portion 81 that covers the outer periphery of the magnet wire core 80, and an end protection portion 82 that covers the end face of the magnet wire core 80. In the compressor 1 according to the first embodiment, similarly to the refrigeration cycle device according to the first embodiment, the magnet wire 64 has a magnet wire core wire 80 which is a conductor, an outer peripheral protection portion 81 which covers the outer peripheral surface of the magnet wire core wire 80, and an end face protection portion 82 which covers the end faces of the magnet wire core wire 80, thereby achieving the effect of suppressing deterioration of the magnet wire core wire 80 caused by substances which promote deterioration of metals generated from the refrigerant.

The motor 4 according to the first embodiment is a motor 4 included in a compressor 1 used in a refrigeration cycle device equipped with a refrigerant circuit in which a refrigerant that generates a substance that accelerates metal deterioration circulates, and includes a rotor 41 and a stator 42. The stator 42 includes a stator core 61 having a plurality of teeth 68 and a magnet wire 64 wound around the teeth 68. The magnet wire 64 includes a magnet wire core 80 that is a conductor, an outer peripheral protection part 81 that covers the outer peripheral surface of the magnet wire core 80, and an end surface protection part 82 that covers the end surface of the magnet wire core 80. The motor 4 according to the first embodiment has a configuration in which the magnet wire 64 includes a magnet wire core 80 that is a conductor, an outer peripheral protection part 81 that covers the outer peripheral surface of the magnet wire core 80, and an end surface protection part 82 that covers the end surface of the magnet wire core 80, as in the refrigeration cycle device according to the first embodiment. This has the effect of suppressing deterioration of the magnet wire core 80 due to a substance that accelerates metal deterioration generated from the refrigerant.

Further, the stator 42 according to the first embodiment is the stator 42 of the motor 4 included in the compressor 1 used in a refrigeration cycle device including a refrigerant circuit in which a refrigerant that generates a substance that promotes metal deterioration circulates. The stator core 61 includes a stator core 61 having a plurality of teeth portions 68 and a magnet wire 64 wound around the teeth portions 68, and the magnet wire 64 covers a magnet wire core wire 80 which is a conductor and an outer peripheral surface of the magnet wire core wire 80. It has a configuration including an outer periphery protection part 81 and an end face protection part 82 that covers the end face of the magnet wire core wire 80. In the stator 42 according to the first embodiment, similarly to the refrigeration cycle apparatus according to the first embodiment, the magnet wire 64 includes a magnet wire core wire 80 that is a conductor and an outer peripheral protection part 81 that covers the outer peripheral surface of the magnet wire core wire 80. By providing the configuration including the end face protection part 82 that covers the end face of the magnet wire core wire 80, it is possible to suppress deterioration of the magnet wire core wire 80 due to a substance that accelerates the deterioration of metal generated from a refrigerant.

Furthermore, the additional configuration of the refrigeration cycle device according to the first embodiment described above may be used as an additional configuration of the compressor 1, motor 4, and stator 42 according to the first embodiment.

The manufacturing method of the stator 42 according to the first embodiment is a manufacturing method of the stator 42 of the motor 4 of the compressor 1 used in a refrigeration cycle device equipped with a refrigerant circuit in which a refrigerant that generates a substance that accelerates metal deterioration circulates, and includes a magnet wire winding process (corresponding to step S3) in which the magnet wire 64 is wound around the teeth 68 of the stator core 61, a cutting process (corresponding to step S7) that is performed after the magnet wire winding process and cuts the magnet wire 64, and an end face protection part forming process (corresponding to step S7) that is performed simultaneously with the cutting process and forms an end face protection part 82 that covers the end face of the magnet wire core 80 that is a conductor of the magnet wire 64. By including the end face protection part forming process, the manufacturing method of the stator 42 according to the first embodiment can form the end face protection part 82 that covers the end face of the magnet wire core 80, and has the effect of manufacturing a stator 42 that suppresses deterioration of the magnet wire core 80 due to a substance that accelerates metal deterioration generated from the refrigerant.

In addition, the manufacturing method of the stator 42 according to the first embodiment has, as an additional configuration, an end face protection portion forming process that includes an integral layer portion forming process (corresponding to step S7), and the cutting process and the integral layer portion forming process are performed simultaneously. In the cutting process and the integral layer portion forming process, a cutter 1000 having an inclined surface portion 1002 that forms a surface inclined with respect to the longitudinal direction of the magnet wire 64 and a cutting edge portion 1001 that is the tip of the inclined surface portion 1002 is used to press the cutting edge portion 1001 against the magnet wire core wire 80 and the outer peripheral protection portion 81 that covers the outer peripheral surface of the magnet wire core wire 80, while pressing the inclined surface portion 1002 against the outer peripheral protection portion 81 to stretch the outer peripheral protection portion 81 on the cut surface of the magnet wire core wire 80, thereby forming an integral layer portion 82a that is the end face protection portion 82 and is integral with the outer peripheral protection portion 81. By including this additional configuration, the manufacturing method of the stator 42 of embodiment 1 can simultaneously perform the process of forming the integral layer portion 82a of the end face protection portion 82 and the process of cutting the magnet wire 64, thereby achieving the effect of shortening the manufacturing process.

Note that the compressor 1 according to Embodiment 1 is an example of the compressor of the present disclosure. For example, the compression mechanism section 8 of the compressor 1 may be a scroll-type compression mechanism section that includes two scrolls, one of which is fixed and the other scroll is oscillated to compress the refrigerant, or a screw-type rotating body. Other existing compression mechanisms may be used, such as a screw-type compression mechanism that rotates to compress the refrigerant.

Further, the motor 4 according to the first embodiment is an example of the motor of the present disclosure. Further, the rotor 41 according to the first embodiment is an example of the rotor of the present disclosure, and the stator 42 according to the first embodiment is an example of the stator of the present disclosure. Therefore, the motor, rotor, and stator can be changed as appropriate depending on the design. For example, the number of teeth portions 68 and the number of divided cores 69 that stator core 61 has are not limited to nine, but may be changed. In particular, when a three-phase AC power source is used as the power source for the motor 4, the number of teeth of the stator and the number of divided iron cores may be a multiple of three other than nine. Furthermore, although the stator core 61 according to the first embodiment is formed into a ring shape by fixing the plurality of split cores 69, the present invention is not limited to this, and the flat magnetic member itself is ring-shaped. A stator core that cannot be divided in the circumferential direction like the split core according to the first embodiment may be formed by laminating magnetic members. Further, the number of permanent magnets 52 and the number of magnet insertion holes 54 of the rotor are not limited to six, but can be changed as appropriate depending on the design.

Further, the magnet wire 64 according to the first embodiment is an example of the magnet wire 64 of the present disclosure. The outer periphery protection portion 81 of the magnet wire 64 may have at least one layer.

The refrigerant used in the refrigeration cycle device according to the first embodiment is an example of the refrigerant disclosed herein, and may be a refrigerant that does not contain trifluoroiodomethane as long as it produces a substance that accelerates the deterioration of metals. An example of such a refrigerant is hydrofluoroolefin (hereinafter referred to as HFO). HFO is an organic compound composed of hydrogen, fluorine, and carbon, and hydrogen fluoride is generated when HFO decomposes. Hydrogen fluoride corresponds to a substance that accelerates the deterioration of metals. HFO also contains a carbon double bond. Carbon double bonds are easily cleaved, so HFO is easily decomposed and hydrogen fluoride is easily generated.

Therefore, the refrigeration cycle device according to the first embodiment may have an additional configuration in which the refrigerant is a refrigerant containing hydrofluoroolefin. With the additional configuration, in the refrigeration cycle device according to the first embodiment, hydrogen fluoride is generated as a substance that accelerates the deterioration of metals more than the refrigerant. However, in the refrigeration cycle device according to the first embodiment, the magnet wire 64 has a magnet wire core wire 80 that is a conductor, an outer periphery protection portion 81 that covers the outer peripheral surface of the magnet wire core wire 80, and an end surface protection portion that covers the end surface of the magnet wire core wire 80. 82, it is possible to suppress deterioration of the magnet wire core wire 80 due to hydrogen fluoride generated from the refrigerant.

The manufacturing method of the stator 42 according to embodiment 1 is one example of a manufacturing method of the stator of the present disclosure. The manufacturing method of the stator can be modified as appropriate depending on factors such as the structure of the stator or the manufacturing equipment. For example, a mechanism for inserting the insulation displacement terminal into the first restraining portion 72 or the second restraining portion 73 may be linked with a cutter for cutting the magnet wire, and the insulation displacement terminal insertion process, cutting process, and end face protection portion formation process may be performed simultaneously. Furthermore, if the flat magnetic member constituting the stator core is itself ring-shaped, the split core fixing process may be omitted.

In addition, in the cutting step of the method for manufacturing the stator 42 according to the first embodiment, a case where only the magnet wire 64 is cut is described, but this is not limited thereto. For example, if an excess portion is provided at the end of the lead wire 13 or the end of the jumper wire 65, the lead wire 13 or the jumper wire 65 may be cut at the same time as the magnet wire 64 in the cutting step, and the excess portion of the lead wire 13 or the jumper wire 65 may be cut off.

Next, a modified version of embodiment 1 will be described. The refrigeration cycle device of the modified version of embodiment 1 is different from the refrigeration cycle device of embodiment 1 in that the magnet wire 64 has a joint 84 and in the manufacturing method of the stator 42. The refrigeration cycle device of the modified version of embodiment 1 is similar to the refrigeration cycle device of embodiment 1 in other configurations except for the magnet wire 64 having a joint 84 and the manufacturing method of the stator 42. Descriptions of these similar parts will be omitted in the modified version of embodiment 1.

FIG. 22 is a cross-sectional view of the end of the magnet wire according to the modification of the first embodiment, cut parallel to the length direction. The magnet wire 64 of the stator 42 according to the modification of the first embodiment has a joint portion 84 . The joint portion 84 is located at the joint portion between the outer periphery protection portion 81 and the integral layer portion 82a or the joint portion between the integral layer portions 82a, and is located at the joint portion between the outer periphery protection portion 81 and the end face protection portion 82, or between the integral layer portions 82a. is the joined part. The outer periphery protection part 81 and the integral layer part 82a according to the modification of the first embodiment are made of thermoplastic resin that softens when heated, and the outer periphery protection part 81 and the integral layer part 82a of the joint part 84 are made of a thermoplastic resin that softens when heated. This is the welded part. In addition, the polyamideimide or polyesterimide used for the outer periphery protection part 81 and the integral layer part 82a in Embodiment 1 is a thermoplastic resin, and the outer periphery protection part 81 and the integral layer part 82a in the modification of Embodiment 1 are The outer periphery protection part 81 and the end face protection part 82 according to the first embodiment are similar to each other.

Figure 23 is a flowchart diagram of a method for manufacturing a stator according to a modified example of embodiment 1. Next, a method for manufacturing a stator 42 according to a modified example of embodiment 1 will be described. Note that steps S1 to S7 are the same as the method for manufacturing a stator 42 according to embodiment 1. In the description of the method for manufacturing a stator 42 according to a modified example of embodiment 1, the description of steps S1 to S7 will be omitted.

After step S7 is completed, the process proceeds to step S8. In step S8, a joining process is performed. The joining process is a process of forming a joint 84 in the magnet wire 64. In the joining process according to the modified example of embodiment 1, the joint 84 is formed by heating the joint portion between the outer peripheral protection portion 81 and the integral layer portion 82a or the joint portion between the integral layer portions 82a with a heating device, and the outer peripheral protection portion 81 and the integral layer portion 82a or the integral layer portions 82a are joined together. Examples of the heating device used in the joining process according to the modified example of embodiment 1 include devices that generate heat by burning fuel, such as a burner that generates heat by burning fuel, a heating wire that generates heat by passing an electric current, or a laser oscillator that irradiates laser light, which can soften thermoplastic resin.

By performing the steps shown in FIG. 23 as described above, the stator 42 according to the modification of the first embodiment is manufactured.

As described above, the refrigeration cycle device according to the modified example of embodiment 1 has, as an additional configuration of the refrigeration cycle device according to embodiment 1, a configuration in which the magnet wire 64 has a joint 84 that joins the outer peripheral protection portion 81 and the integral layer portion 82a or the integral layer portions 82a to each other. With this additional configuration, the refrigeration cycle device according to embodiment 1 can further prevent the refrigerant from coming into contact with the end face of the magnet wire core wire 80 by the joint 84, and has the effect of further preventing deterioration of the magnet wire core wire 80 due to substances that promote deterioration of metals generated from the refrigerant.

Note that additional configurations included in the refrigeration cycle device according to the modification of the first embodiment include the compressor 1 according to the first embodiment, the motor 4 according to the first embodiment, and the stator 42 according to the first embodiment. It is also possible to have an additional configuration.

Furthermore, the method for manufacturing the stator 42 according to the modification of the first embodiment is performed after the integral layer forming step as an additional configuration of the method for manufacturing the stator 42 according to the first embodiment, and The structure includes a joining step (step S8 corresponds to this) of forming a joining part 84 that joins the part 81 and the integral layer part 82a or the integral layer parts 82a together. With this additional configuration, in the method for manufacturing the stator 42 according to the first embodiment, by forming the joint portion 84 on the magnet wire 64, it is possible to suppress the end surface protection portion 82 from peeling off from the end surface of the magnet wire core wire 80. However, it is possible to manufacture a stator 42 that further suppresses deterioration of the magnet wire core wire 80 due to substances generated from the refrigerant that promote deterioration of metal.

In the modified example of the first embodiment, the outer peripheral protection part 81 and the integral layer part 82a are made of a thermoplastic resin, and the joint part 84 is formed by heating the outer peripheral protection part 81 and the integral layer part 82a, but this is not limiting, and the joint part 84 may be formed by other well-known methods. For example, the joint part 84 may be formed by applying pressure to the outer peripheral protection part 81 and the integral layer part 82a to press the outer peripheral protection part 81 and the integral layer part 82a together.

Embodiment 2.
Next, a refrigeration cycle device according to a second embodiment will be explained. The refrigeration cycle device according to the second embodiment differs from the refrigeration cycle device according to the first embodiment in the structure of the end face protection portion 82 of the magnet wire 64 and the manufacturing method of the stator 42. The refrigeration cycle apparatus according to the second embodiment is the same as the refrigeration cycle apparatus according to the first embodiment except for the structure of the end face protection part 82 of the magnet wire 64 and the method of manufacturing the stator 42. Description of the similar portions will be omitted in the second embodiment.

Figure 24 is a cross-sectional view of the end of the magnet wire according to the second embodiment when it is cut parallel to the length direction. The details of the end face protection part 82 of the magnet wire 64 according to the second embodiment will be described. The end face protection part 82 is formed on both ends of the magnet wire 64 and covers the end face of the magnet wire core wire 80. The end face protection part 82 is made of a material that does not deteriorate due to substances that accelerate the deterioration of metals generated from refrigerants such as hydrogen iodide, and an example of the material is a resin material. The end face protection part 82 according to the second embodiment is separate from the outer periphery protection part 81. The end face protection part 82 according to the second embodiment is made of a cured resin that is applied in a fluid state such as a thermosetting resin, a photocurable resin, or a varnish and hardens after application. Furthermore, the end face protection part 82, which is separate from the outer periphery protection part 81, is referred to as a separate layer part 82b. In other words, the stator 42 according to the second embodiment has a separate layer part 82b formed as the end face protection part 82.

FIG. 25 is a flowchart of the stator manufacturing method according to the second embodiment. Next, a method for manufacturing the stator 42 according to the second embodiment will be described. Note that steps S1 to S6 are the same as the method for manufacturing the stator 42 according to the first embodiment. In the method for manufacturing the stator 42 according to the second embodiment, descriptions of steps S1 to S6 will be omitted.

After step S6 ends, the process advances to step S9. In step S9, a cutting process is performed. In step S9, unlike step S7 according to the first embodiment, the integral layer portion forming step is not performed simultaneously with the cutting step as in the comparative example described in step S7 according to the first embodiment. Therefore, the end face of the magnet wire core wire 80 is exposed immediately after the magnet wire 64 is cut in step S9.

After step S9 ends, the process advances to step S10. In step S10, an end face protection portion forming step is performed. Here, in the method for manufacturing the stator 42 according to the second embodiment, in order to form the separate layer portion 82b which is the end face protection part 82 so as to cover the end face of the magnet wire core wire 80, the fixing method according to the first embodiment The end face protection portion forming step of the method for manufacturing the child 42 includes a separate layer portion forming step of forming the separate layer portion 82b.

Specifically, in step S10, a cured resin having a flowable state is applied to cover the end face of the magnet wire core 80, and the applied cured resin is cured. The cured resin applied in step S10 becomes the separate layer portion 82b, and the end face protection portion 82 is formed.

By carrying out the steps shown in Figure 25 as described above, the stator 42 of embodiment 2 is manufactured.

As described above, the refrigeration cycle device according to the second embodiment, like the refrigeration cycle device according to the first embodiment, includes a compressor 1 for compressing a refrigerant, a condenser for condensing the refrigerant discharged from the compressor 1, a pressure reducing device for reducing the pressure of the refrigerant flowing out from the condenser, and an evaporator for evaporating the refrigerant reduced in pressure by the pressure reducing device, and the refrigerant produces a substance that accelerates the deterioration of metals. The compressor 1 includes a compression mechanism 8 for compressing the refrigerant, a motor 4 having a rotor 41 and a stator 42 and driving the compression mechanism 8, and the stator 42 includes a stator core 61 having a plurality of teeth 68 and a magnet wire 64 wound around the teeth 68. The magnet wire 64 includes a magnet wire core 80 which is a conductor, an outer peripheral protection part 81 which covers the outer peripheral surface of the magnet wire core 80, and an end surface protection part 82 which covers the end surface of the magnet wire core 80. Therefore, the refrigeration cycle device according to the second embodiment has the same effect as the refrigeration cycle device according to the first embodiment.

Furthermore, the refrigeration cycle device according to the second embodiment has a configuration in which the end face protection part 82 has a separate layer part 82b that is separate from the outer circumferential protection part 81 as an additional structure. With this additional configuration, the refrigeration cycle device according to the second embodiment can protect the end face protection portion 82 even in existing equipment where the end face of the magnet wire core wire 80 is exposed when the magnet wire 64 is cut in the cutting process. It is possible to manufacture the stator 42 that suppresses deterioration of the magnet wire core wire 80 due to substances that can be formed and promote deterioration of metal generated from the refrigerant.

In addition, the configuration of the compressor 1 according to the second embodiment, the configuration of the motor 4 according to the second embodiment, and the configuration of the stator 42 according to the second embodiment are the same as the configuration of the compressor 1 according to the first embodiment, the configuration of the motor 4 according to the first embodiment, and the configuration of the stator 42 according to the first embodiment. Therefore, the compressor 1 according to the second embodiment, the motor 4 according to the second embodiment, and the stator 42 according to the second embodiment have a configuration in which the magnet wire 64 has a magnet wire core wire 80 which is a conductor, an outer peripheral protective part 81 which covers the outer peripheral surface of the magnet wire core wire 80, and an end surface protective part 82 which covers the end surface of the magnet wire core wire 80, thereby achieving the effect of suppressing deterioration of the magnet wire core wire 80 due to a substance that promotes deterioration of metal generated from the refrigerant.

Furthermore, the additional configuration of the refrigeration cycle device according to the second embodiment may be an additional configuration of the compressor 1, motor 4, and stator 42 according to the second embodiment.

The manufacturing method of the stator 42 according to the second embodiment is a manufacturing method of the stator 42 of the motor 4 of the compressor 1 used in a refrigeration cycle device equipped with a refrigerant circuit in which a refrigerant that generates a substance that accelerates metal deterioration circulates, and includes a magnet wire winding process (corresponding to step S3) in which the magnet wire 64 is wound around the teeth 68 of the stator core 61, a cutting process (corresponding to step S9) that is performed after the magnet wire winding process and cuts the magnet wire 64, and an end face protection part forming process (corresponding to step S10) that is performed after the cutting process and forms an end face protection part 82 that covers the end face of the magnet wire core wire 80 that is a conductor of the magnet wire 64. As with the manufacturing method of the stator 42 according to the first embodiment, the manufacturing method of the stator 42 according to the second embodiment also includes an end face protection part forming process, thereby forming the end face protection part 82 that covers the end face of the magnet wire core wire 80, and has the effect of manufacturing a stator 42 that suppresses deterioration of the magnet wire core wire 80 due to a substance that accelerates metal deterioration generated from the refrigerant.

Furthermore, in the method for manufacturing the stator 42 according to the second embodiment, as an additional configuration, the end face protection portion forming step includes a separate layer portion forming step (step S10 corresponds to), and the separate layer portion The forming process is performed after the cutting process (step S9 applies), and in the separate layer forming process, a hardened resin that hardens after application is applied to the end face of the magnet wire 64 cut in the cutting process, thereby forming the end face protection part 82. It has a structure in which a separate layer part 82b is formed separately from the outer peripheral protection part 81 that covers the outer peripheral surface of the magnet wire core wire 80. With this additional configuration, the method for manufacturing the stator 42 according to the second embodiment can protect the end face even in existing equipment where the end face of the magnet wire core wire 80 is exposed when the magnet wire 64 is cut in the cutting process. The stator 42 can be manufactured to suppress deterioration of the magnet wire core wire 80 due to substances generated from the refrigerant that promote deterioration of metal.

Next, a modified example of the second embodiment will be described. The refrigeration cycle device according to the modified example of the second embodiment is different from the refrigeration cycle device according to the second embodiment in that the separate layer part 82b of the end face protection part 82 covers the end face of the lead core wire of the lead wire 13 or the end face of the jumper core wire of the jumper wire 65, and in the manufacturing method of the stator 42. The refrigeration cycle device according to the modified example of the second embodiment is similar to the refrigeration cycle device according to the second embodiment in other configurations except that the separate layer part 82b of the end face protection part 82 covers the end face of the lead core wire of the lead wire 13 or the end face of the jumper core wire of the jumper wire 65, and in the manufacturing method of the stator 42. The description of the similar parts will be omitted in the modified example of the second embodiment.

FIG. 26 is an enlarged view of a first restraint part and a second restraint part of a stator according to a modification of the second embodiment. The end face of the lead core wire of the lead wire 13 or the crossover core wire of the crossover wire 65 according to the modification of the second embodiment is exposed from the first conductor restraining portion 72b or the second conductor restraining portion 73b. The separate layer part 82b of the end face protection part 82 covers both end faces of the magnet wire core wire 80, as well as the end face of the lead core wire or the crossover core wire exposed from the first conductor restraint part 72b or the second conductor restraint part 73b. Cover the edge. Note that originally the magnet wire 64, lead wire 13, and crossover wire 65 are covered by a separate layer 82b and cannot be seen, but in FIG. 26, the magnet wire 64, lead wire 13, and crossover wire 65 are shown with broken lines for explanation. It is shown in

Next, a method for manufacturing a stator 42 according to a modified example of embodiment 2 will be described. Note that, except for the details of step S9 and step S10, this method is the same as the method for manufacturing a stator 42 according to embodiment 2. Descriptions of these similar parts will be omitted in the method for manufacturing a stator 42 according to embodiment 2. Also, the flowchart of the method for manufacturing a stator 42 according to embodiment 2 is the same as the flowchart of the method for manufacturing a stator 42 according to embodiment 2, and is represented in FIG. 25.

In the cutting process carried out in step S9, the lead wire 13 or the crossover wire 65 is cut at the same time as the magnet wire 64 in order to cut off the surplus portion of the lead wire 13 and the surplus portion of the crossover wire 65. Therefore, immediately after the lead wire 13 or the crossover wire 65 is cut in step S9, the end face of the lead core wire or the end face of the crossover core wire is exposed from the first conductor restraint part 72b or the second conductor restraint part 73b.

In the end face protection portion forming process performed in step S10, a separate layer portion 82b, which is the end face protection portion 82, is formed so that the separate layer portion 82b covers the end face of the magnet wire core wire 80 and the end face of the lead core wire or the end face of the jumper core wire.

Specifically, in step S10, a cured resin having fluidity is applied so as to cover the end face of the magnet wire core wire 80 and the end face of the lead core wire or the end face of the crossover core wire, and the applied cured resin is cured. The cured resin applied in step S10 becomes the separate layer portion 82b, and the end face protection portion 82 is formed.

By performing the steps shown in FIG. 25 as described above, the stator 42 according to the modification of the second embodiment is manufactured.

As described above, in the refrigeration cycle device according to the modified embodiment 2, as an additional configuration of the refrigeration cycle device according to the embodiment 2, the stator 42 has a jumper wire 65 that electrically connects the magnet wire 64 wound around different teeth 68, the jumper wire 65 has a jumper core wire that is a conductor and a jumper wire coating that covers the outer periphery of the jumper core wire, and the separate layer portion 82b of the end surface protection portion 82 has a configuration that covers the end surface of the jumper core wire. By having this additional configuration, the refrigeration cycle device according to the modified embodiment 2 can manufacture a stator 42 that can suppress contact between the jumper core wire and the refrigerant by the separate layer portion 82b and suppress deterioration of the jumper core wire due to substances that accelerate deterioration of metals generated from the refrigerant.

Further, in the refrigeration cycle device according to the modification of the second embodiment, as an additional configuration of the refrigeration cycle device according to the second embodiment, the stator 42 is connected to a lead wire 13 that electrically connects the power source and the magnet wire 64. The lead wire 13 has a lead core wire that is a conductor and a lead wire coating that covers the outer periphery of the lead core wire, and the separate layer portion 82b of the end surface protection portion 82 has a configuration that covers the end surface of the lead core wire. By including the additional configuration, the refrigeration cycle device according to the modification of the second embodiment can suppress contact between the lead core wire and the refrigerant by the separate layer portion 82b, and promote deterioration of metal generated from the refrigerant. It is possible to manufacture a stator 42 that suppresses deterioration of the lead core wires due to substances that cause deterioration.

Note that additional configurations included in the refrigeration cycle device according to the modification of the second embodiment include the compressor 1 according to the second embodiment, the motor 4 according to the second embodiment, and the stator 42 according to the second embodiment. It is also possible to have an additional configuration.

Furthermore, the manufacturing method of the stator 42 according to the modified embodiment of the second embodiment includes, as an additional configuration of the manufacturing method of the stator 42 according to the second embodiment, a wiring process (corresponding to step S5) that is performed before the separate layer portion forming process (corresponding to step S10) and that electrically connects the power source and the magnet wire 64 to the lead wire 13 or the jumper wire 65 that electrically connects the magnet wire 64 wound around different teeth portions 68, and in the separate layer portion forming process, the end face of the lead wire 13 or the end face of the jumper wire 65 is covered with the separate layer portion 82b. By including this additional configuration, the manufacturing method of the stator 42 according to the modified embodiment of the second embodiment has the effect of being able to manufacture a stator 42 that suppresses deterioration of the lead core wire or the jumper core wire caused by a substance that promotes deterioration of metal generated from the refrigerant.

Embodiment 3.
Next, a refrigeration cycle apparatus according to embodiment 3 will be described. The refrigeration cycle apparatus according to embodiment 3 differs from the refrigeration cycle apparatus according to embodiment 1 in the structure of the end face protection portion 82 of the magnet wire 64 and the manufacturing method of the stator 42. The refrigeration cycle apparatus according to embodiment 3 is similar to the refrigeration cycle apparatus according to embodiment 1 in other configurations except for the structure of the end face protection portion 82 of the magnet wire 64 and the manufacturing method of the stator 42. Descriptions of the similar parts will be omitted in embodiment 3.

FIG. 27 is a cross-sectional view of the end of the magnet wire according to Embodiment 3, cut parallel to the length direction. Details of the end face protection portion 82 of the magnet wire 64 according to the third embodiment will be described. The end face protection parts 82 are formed at both ends of the magnet wire 64 and cover the end faces of the magnet wire core wire 80. The end face protection portion 82 has a two-layer structure including an integral layer portion 82a and a separate layer portion 82b. The integral layer portion 82a covers the end face of the magnet wire core wire 80. Further, the separate layer portion 82b covers the integral layer portion 82a.

FIG. 28 is a flowchart of a method for manufacturing a stator according to the third embodiment. Next, a method for manufacturing the stator 42 according to the third embodiment will be described. Note that steps S1 to S7 are the same as the method for manufacturing the stator 42 according to the first embodiment. In the method for manufacturing the stator 42 according to the third embodiment, descriptions of steps S1 to S7 will be omitted.

After step S7 is completed, the process proceeds to step S11. In step S11, an end face protection portion forming step is performed. Here, in the method for manufacturing the stator 42 according to the third embodiment, the separate layer portion 82b is formed so as to cover the end surface of the magnet wire 64 on which the integral layer portion 82a is formed in step S7. Therefore, the end face protection portion forming step of the method for manufacturing the stator 42 according to the third embodiment includes a separate layer portion forming step of forming the separate layer portion 82b.

Specifically, in step S11, a cured resin having fluidity is applied so as to cover the end of the magnet wire 64 on which the integral layer portion 82a is formed, and the applied cured resin is cured. The cured resin applied in step S11 becomes the separate layer portion 82b.

By performing the steps shown in Figure 28 as described above, the stator 42 of embodiment 3 is manufactured.

As described above, the refrigeration cycle device according to the third embodiment, like the refrigeration cycle device according to the first embodiment, includes a compressor 1 for compressing a refrigerant, a condenser for condensing the refrigerant discharged from the compressor 1, a pressure reducing device for reducing the pressure of the refrigerant flowing out from the condenser, and an evaporator for evaporating the refrigerant reduced in pressure by the pressure reducing device, and the refrigerant produces a substance that accelerates the deterioration of metals. The compressor 1 includes a compression mechanism 8 for compressing the refrigerant, a motor 4 having a rotor 41 and a stator 42 and driving the compression mechanism 8, and the stator 42 includes a stator core 61 having a plurality of teeth 68 and a magnet wire 64 wound around the teeth 68. The magnet wire 64 includes a magnet wire core 80 which is a conductor, an outer peripheral protection part 81 which covers the outer peripheral surface of the magnet wire core 80, and an end surface protection part 82 (the integral layer part 82a and the separate layer part 82b) which covers the end surface of the magnet wire core 80. Therefore, the refrigeration cycle device according to the third embodiment has the same effect as the refrigeration cycle device according to the first embodiment.

Furthermore, in the refrigeration cycle device according to the third embodiment, as an additional configuration, the end face protection part 82 has an integral layer part 82a that is integral with the outer periphery protection part 81 and a separate layer part 82b that is separate from the outer periphery protection part 81, and the separate layer part 82b has a configuration in which the integral layer part 82a covers the integral layer part 82a. With this additional configuration, in the refrigeration cycle device according to the third embodiment, the magnet wire core wire 80 is covered with the integral layer part 82a and the separate layer part 82b, and deterioration of the magnet wire core wire 80 caused by substances that promote deterioration of metals generated from the refrigerant can be further suppressed.

In addition, the configuration of the compressor 1 according to the third embodiment, the configuration of the motor 4 according to the third embodiment, and the configuration of the stator 42 according to the third embodiment are the same as the configuration of the compressor 1 according to the first embodiment, the configuration of the motor 4 according to the first embodiment, and the configuration of the stator 42 according to the first embodiment. Therefore, the compressor 1 according to the third embodiment, the motor 4 according to the third embodiment, and the stator 42 according to the third embodiment have a magnet wire 64 having a magnet wire core 80 which is a conductor, an outer peripheral protective part 81 which covers the outer peripheral surface of the magnet wire core 80, and an end surface protective part 82 which covers the end surface of the magnet wire core 80, thereby suppressing deterioration of the magnet wire core 80 due to a substance which promotes deterioration of metal generated from the refrigerant.

Furthermore, the additional configuration of the refrigeration cycle device according to the third embodiment may be an additional configuration of the compressor 1, motor 4, and stator 42 according to the third embodiment.

Further, the method for manufacturing the stator 42 according to the third embodiment is a method for manufacturing the stator 42 of the motor 4 of the compressor 1 used in a refrigeration cycle device including a refrigerant circuit in which a refrigerant that generates a substance that accelerates metal deterioration circulates. 42, which includes a magnet wire winding step (step S3 corresponds) of winding the magnet wire 64 around the teeth portions 68 of the stator core 61, and a cutting of the magnet wire 64 performed after the magnet wire winding step. (step S7 is applicable); and an end face protection part forming process (step S7 and Step S10 corresponds to this). Similarly to the method for manufacturing the stator 42 according to Embodiment 1, the method for manufacturing the stator 42 according to the third embodiment also includes the step of forming an end surface protection portion, thereby creating an end surface protection that covers the end surface of the magnet wire core wire 80. The stator 42 can be manufactured to suppress deterioration of the magnet wire core wire 80 due to substances generated from the refrigerant that promote deterioration of metal.

Furthermore, in the manufacturing method of the stator 42 according to the third embodiment, as an additional configuration, the end face protection part forming process has an integral layer part forming process (corresponding to step S7) and a separate layer part forming process (corresponding to step S10), and the cutting process and the integral layer part forming process are performed simultaneously. In the cutting process and the integral layer part forming process, a cutter 1000 having an inclined surface part 1002 forming a surface inclined with respect to the longitudinal direction of the magnet wire 64 and a cutting edge part 1001 which is the tip of the inclined surface part 1002 is used to cut the magnet wire core wire 80 and the outer periphery protection part 8 which covers the outer periphery of the magnet wire core wire 80. 1 to cut it, and the inclined surface portion 1002 is pressed against the outer periphery protection portion 81 to stretch the outer periphery protection portion 81 to the end face of the magnet wire core wire 80 cut by the cutting edge portion 1001 to form an integral layer portion 82a which is the end face protection portion 82 and is integral with the outer periphery protection portion 81, and the separate layer portion forming step is performed after the cutting step (corresponding to step S7), and in the separate layer portion forming step, a cured resin which is applied and cured after application is applied to the end face of the magnet wire 64 cut by the cutting step to form a separate layer portion 82b which is the end face protection portion 82 and is separate from the outer periphery protection portion 81. By providing this additional configuration, the manufacturing method of the stator 42 according to the third embodiment has an effect of manufacturing a stator 42 in which the magnet wire core wire 80 is covered with the integral layer portion 82a and the separate layer portion 82b, and which further suppresses deterioration of the magnet wire core wire 80 caused by a substance which accelerates deterioration of metal generated from the refrigerant.

In addition, the refrigeration cycle device of embodiment 3, the compressor of embodiment 3, the motor of embodiment 3, the stator of embodiment 3, or the manufacturing method of a stator of embodiment 3 may be supplemented with an additional configuration of the refrigeration cycle device of a modified example of embodiment 1, an additional configuration of the manufacturing method of a stator of a modified example of embodiment 1, an additional configuration of the refrigeration cycle device of a modified example of embodiment 2, or an additional configuration of the manufacturing method of a stator of a modified example of embodiment 2.

For example, the magnet wire 64 may have a joint 84, and the separate layer portion 82b may be formed to cover the integral layer portion 82a and the joint 84. In this case, in the manufacturing method of the stator 42, the separate layer portion forming process is carried out after the joining process is carried out.

In addition, the separate layer portion 82b covering the integral layer portion 82a may be formed to cover the end face of the lead core wire or the end face of the jumper core wire.

1 Compressor, 2 Airtight container, 3 Accumulator, 4 Motor, 5 Main shaft, 6 Upper bearing, 7 Lower bearing, 8 Compression mechanism section, 9 Discharge pipe, 10 Connecting pipe, 11 Oil storage section, 12 Power terminal, 13 Lead wire, 14 suction pipe, 41 rotor, 42 stator, 51 rotor core, 52 permanent magnet, 53 shaft insertion hole, 54 magnet insertion hole, 61 stator core, 62 upper insulator, 63 lower insulator, 64 magnet wire , 64a first magnet wire, 64b second magnet wire, 64c third magnet wire, 64d fourth magnet wire, 64e fifth magnet wire, 64f sixth magnet wire, 64g seventh magnet wire, 64h eighth magnet wire, 64i ninth magnet wire, 65 crossover wire, 66 pressure contact terminal, 66a first groove, 66b second groove, 67 back yoke, 68 teeth, 68a first teeth, 68b Second tooth portion, 68c Third tooth portion, 68d Fourth tooth portion, 68e Fifth tooth portion, 68f Sixth tooth portion, 68g Seventh tooth portion, 68h Eighth tooth portion, 68i Ninth teeth portion, 69 Split core, 69a First split core, 69b Second split core, 69c Third split core, 69d Fourth split core, 69e Fifth split core, 69f Sixth split Iron core, 69g Seventh split core, 69h Eighth split core, 69i Ninth split core, 70 Upper back yoke insulation part, 71 Upper teeth insulation part, 72 First restraint part, 72a First magnet wire restraint Part, 72b First conductor restraint part, 73 Second restraint part, 73a Second magnet wire restraint part, 73b Second conductor restraint part, 74 Lower back yoke insulation part, 75 Lower teeth insulation part, 76 Cluster, 80 Magnet wire core wire, 81 Outer periphery protection part, 81a First layer outer periphery protection part, 81b Second layer outer periphery protection part, 82 End face protection part, 82a Integral layer part, 82b Separate layer part, 83 Surplus part, 84 Joining part, 90 neutral point, 91 U-phase coil group, 92 V-phase coil group, 93 W-phase coil group, 100 refrigerator, 101 compressor, 101a discharge port, 101b suction port, 102 condenser, 102a flow Inlet, 102b Outlet, 103 Pressure reducing device, 104 Evaporator, 104a Inlet, 104b Outlet, 105 Refrigerant pipe, 105a First refrigerant pipe, 105b Second refrigerant pipe, 105c Third refrigerant pipe, 105d Fourth refrigerant piping, 200 air conditioner, 201 compressor, 201a discharge port, 201b suction port, 202 outdoor heat exchanger, 202a first connection port, 202b second connection port, 203 pressure reduction device, 204 indoor heat exchanger , 204a first connection port, 204b second connection port, 205 flow path switching device, 206 refrigerant pipe, 206a first refrigerant pipe, 206b second refrigerant pipe, 206c third refrigerant pipe, 206d fourth Refrigerant piping, 206e Fifth refrigerant piping, 206f Sixth refrigerant piping, 300 Air conditioner, 301 Compressor, 301a Discharge port, 301b Suction port, 302 Outdoor heat exchanger, 302a First connection port, 302b Second connection port, 303 pressure reduction device, 304 refrigerant heat medium heat exchanger, 304a first refrigerant side connection port, 304b second refrigerant side connection port, 304c first heat medium side connection port, 304d second heat Medium side connection port, 305 flow path switching device, 306 refrigerant piping, 306a first refrigerant piping, 306b second refrigerant piping, 306c third refrigerant piping, 306d fourth refrigerant piping, 306e fifth refrigerant piping, 306f Sixth refrigerant pipe, 307 Indoor heat exchanger, 307a First connection port, 307b Second connection port, 308 Pump, 308a Discharge port, 308b Suction port, 309 Heat medium pipe, 309a First heat medium pipe , 309b second heat medium pipe, 309c third heat medium pipe, 1000 cutter, 1001 cutting edge portion, 1002 inclined surface portion, 1003 parallel surface portion, 2000 cutter, 2001 cutting edge portion, 2002 inclined surface portion, 2003 parallel surface portion.

Claims (12)

a compressor that compresses refrigerant;
a condenser that condenses the refrigerant discharged from the compressor;
a pressure reducing device that reduces the pressure of the refrigerant flowing out from the condenser;
an evaporator that evaporates the refrigerant reduced in pressure by the pressure reduction device;
Equipped with
the refrigerant generates a substance that accelerates metal deterioration;
The compressor includes a compression mechanism unit that compresses the refrigerant, and a motor that has a rotor and a stator and drives the compression mechanism unit,
The stator includes a stator core having a plurality of teeth portions, and a magnet wire wound around the teeth portions,
The magnet wire has a magnet wire core wire that is a conductor, an outer peripheral protection part that covers an outer peripheral surface of the magnet wire core wire, and an end surface protection part that covers an end surface of the magnet wire core wire ,
The end face protection part has an integral layer part that is integrated with the outer periphery protection part,
The integral layer portion is a portion where the outer periphery protection portion is extended to an end surface of the magnet wire core wire.
Refrigeration cycle equipment. The end surface protection portion has a separate layer portion that is separate from the outer periphery protection portion,
The refrigeration cycle apparatus according to claim 1 , wherein the separate layer portion covers the integral layer portion . The stator has a crossover wire that electrically connects the magnet wires wound around different teeth portions,
The crossover wire has a crossover core wire that is a conductor, and a crossover wire coating that covers the outer periphery of the crossover core wire,
The refrigeration cycle device according to claim 2 , wherein the separate layer part of the end face protection part covers the end face of the crossover core wire . The stator has a crossover wire that electrically connects the magnet wires wound around different teeth portions,
The crossover wire has a crossover core wire that is a conductor, and a crossover wire coating that covers the outer periphery of the crossover core wire,
The refrigeration cycle device according to claim 2 or 3 , wherein the separate layer part of the end face protection part covers the end face of the crossover core wire . The refrigeration cycle device according to any one of claims 1 to 4, wherein the refrigerant is a refrigerant containing trifluoroiodomethane . The refrigeration cycle device according to claim 1 , wherein the refrigerant is a refrigerant containing a hydrofluoroolefin . A compressor used in a refrigeration cycle device having a refrigerant circuit in which a refrigerant that produces a substance that accelerates metal deterioration circulates,
a compression mechanism unit that compresses the refrigerant;
a motor having a stator and a rotor and driving the compression mechanism,
The stator includes a stator core having a plurality of teeth portions, and a magnet wire wound around the teeth portions,
The magnet wire has a magnet wire core wire that is a conductor, an outer peripheral protection part that covers an outer peripheral surface of the magnet wire core wire, and an end surface protection part that covers an end surface of the magnet wire core wire,
the end surface protection portion has an integral layer portion that is integral with the outer periphery protection portion,
The integral layer portion is a portion in which the outer circumferential protection portion is extended to an end face of the magnet wire core. A motor included in a compressor used in a refrigeration cycle device including a refrigerant circuit in which a refrigerant that generates a substance that accelerates metal deterioration circulates,
Comprising a rotor and a stator,
The stator includes a stator core having a plurality of teeth portions, and a magnet wire wound around the teeth portions,
The magnet wire has a magnet wire core wire that is a conductor, an outer peripheral protection portion that covers an outer peripheral surface of the magnet wire core wire, and an end surface protection portion that covers an end surface of the magnet wire core wire,
The end face protection part has an integral layer part that is integrated with the outer periphery protection part,
The motor, wherein the integral layer portion is a portion in which the outer peripheral protection portion is extended to the end face of the magnet wire core. A stator of a motor included in a compressor used in a refrigeration cycle device having a refrigerant circuit in which a refrigerant that produces a substance that accelerates metal deterioration circulates,
A stator core having a plurality of teeth and a magnet wire wound around the teeth,
The magnet wire has a magnet wire core wire that is a conductor, an outer peripheral protection part that covers an outer peripheral surface of the magnet wire core wire, and an end surface protection part that covers an end surface of the magnet wire core wire,
the end surface protection portion has an integral layer portion that is integral with the outer periphery protection portion,
In the stator, the integral layer portion is a portion in which the outer periphery protection portion is extended to an end surface of the magnet wire core wire. A method for manufacturing a stator of a motor included in a compressor used in a refrigeration cycle device having a refrigerant circuit in which a refrigerant that produces a substance that accelerates metal deterioration circulates, comprising:
a magnet wire winding process for winding magnet wire around teeth of a stator core;
a cutting step of cutting the magnet wire, which is performed after the magnet wire winding step;
an end surface protection portion forming step, which is performed after the cutting step or simultaneously with the cutting step, and which forms an end surface protection portion that covers an end surface of a magnet wire core wire that is a conductor of the magnet wire,
The end surface protection portion forming step includes an integral layer portion forming step,
The cutting step and the integral layer portion forming step are carried out simultaneously,
In the cutting step and the integral layer forming step, a cutter having an inclined surface portion forming a surface inclined with respect to the length direction of the magnet wire and a cutting edge portion that is the tip of the inclined surface portion is used, While cutting by pressing the cutting edge portion against the magnet wire core wire and an outer peripheral protection portion that covers the outer peripheral surface of the magnet wire core wire, pressing the inclined surface portion against the outer peripheral protection portion to cut the magnet wire core wire. A method for manufacturing a stator, comprising stretching the outer periphery protection portion to form an integral layer portion that is the end face protection portion and is integral with the outer periphery protection portion. The end surface protection portion forming step includes a separate layer portion forming step,
The separate layer portion forming step is performed after the cutting step,
In the separate layer forming step, a cured resin that is cured after application is applied to the end face of the magnet wire cut in the cutting step to form an outer periphery protection which is the end face protection part and covers the outer circumferential surface of the magnet wire core wire. 11. The method for manufacturing a stator according to claim 10, further comprising forming a separate layer section that is separate from the stator section. a wiring step, which is carried out before the separate layer portion forming step, for wiring a lead wire that electrically connects a power source to the magnet wire or a jumper wire that electrically connects the magnet wire wound around different teeth portions;
12. The stator manufacturing method according to claim 11, wherein in the separate layer forming step, the separate layer covers an end face of the lead wire or an end face of the crossover wire.

Images