Compressors and air conditioners

Abstract

To provide a compressor capable of reducing noise caused by bending vibration of a rotation shaft.SOLUTION: A compressor comprises a sealed container, a compression mechanism unit, a motor unit, a bearing, and a bobbin. The sealed container is cylindrical. The compression mechanism unit has a rotation shaft that rotates around an axis at the inside of the sealed container to compress a coolant. The motor unit has a rotor fixed to the rotation shaft, and a stator which is fixed on an inner periphery of the sealed container to surround the rotor, and around which a coil is wound to drive the rotation shaft. The bearing is provided on an opposite side to the compression mechanism unit with the motor unit in between in an axial direction of the rotation shaft to rotatably support the rotation shaft. The bobbin has a first portion including a coil wiring portion in which the coil is wired, and a second portion including a bearing holding portion that holds the bearing, and is provided on one end portion in the axial direction in the stator.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a compressor and an air conditioner including the compressor. [Background technology]

[0002] Refrigeration cycle devices such as air conditioners are equipped with compressors that compress refrigerants. The compressor includes, as its main components, an electric motor that rotates a rotating shaft, a compression mechanism connected to the electric motor via the rotating shaft, and a sealed container that houses the electric motor and compression mechanism. The electric motor includes, for example, an inner rotor motor, and includes a rotor fixed to the rotating shaft and a stator fixed to the inner periphery of the sealed container. The rotating shaft has a crank pin (eccentric portion). The compression mechanism includes, for example, a cylinder that forms a cylinder chamber and a roller fitted to the eccentric portion of the rotating shaft and rotating eccentrically within the cylinder chamber. The cylinder chamber is divided into a suction chamber and a compression chamber by vanes. The rotating shaft is rotatably supported by bearings arranged in the compression mechanism. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-177158 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-66164 [Patent Document 3] Japanese Utility Model Application Publication No. 63-4394 Summary of the Invention [Problem to be solved by the invention]

[0004] In the sealed container, the electric motor unit is located at the top and the compression mechanism unit is located at the bottom, and they are connected via a rotating shaft. The bearing that supports the rotating shaft is built into the compression mechanism unit and supports the lower part of the rotating shaft. In contrast, the upper part of the rotating shaft is not supported by a bearing. As a result, the rotating shaft is supported in a cantilevered state, which can cause the rotating shaft to whirl during operation, which can increase noise due to vibration. [Means for solving the problem]

[0005] The compressor according to one embodiment includes a sealed container, a compression mechanism, and an electric motor. ,shaft Receiver , Bo The sealed container has a cylindrical shape. The compression mechanism includes a rotary compressor that rotates around an axis inside the sealed container. Axis Yes and compresses the refrigerant The electric motor section has a rotor fixed to the rotary shaft and a stator fixed to the inner periphery of the sealed container, surrounding the rotor, and wound with a coil, and drives the rotary shaft. Marking axis The bearing is in the axial direction of the rotating shaft. Before The bobbin is disposed on the opposite side of the motor unit from the compression mechanism unit and rotatably supports the rotary shaft. The bobbin has a first portion including a coil wiring portion to which the coil wound around the stator is wired, and a front portion including a coil wiring portion to which the coil wound around the stator is wired. Marking axis bearing holder that holds the bearing Mu-th The rotor has two portions and is disposed at one end of the stator in the axial direction. In addition to the first and second parts, the bobbin has a third part connecting the first part and the second part. The third part connects the first part and the second part so that the first part and the second part are continuous on approximately the same plane in a first state before the bearing holder holds the bearing, and connects the first part and the second part so that the first part and the second part face each other in the axial direction in a second state after the bearing holder holds the bearing. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a circuit diagram schematically showing the configuration of an air conditioner according to a first embodiment. [Figure 2] 1 is a vertical cross-sectional view of a compressor according to a first embodiment. [Figure 3] 1 is a perspective view schematically showing a state in which a bobbin according to a first embodiment is assembled to a stator. [Figure 4] FIG. 1 is a perspective view schematically showing a bobbin according to a first embodiment. [Figure 5] 1 is a perspective view schematically illustrating a configuration of a bobbin in which a first portion, a second portion, and a third portion are formed by processing a metal plate in a first embodiment. FIG. [Figure 6] FIG. 10 is a diagram schematically illustrating, from below, a state in which a first claw of a second portion holds a bearing (third bearing) in the first embodiment. [Figure 7] FIG. 10 is a perspective view schematically showing a bobbin according to a second embodiment. [Figure 8] FIG. 10 is a perspective view schematically showing a bobbin according to a third embodiment. [Figure 9] FIG. 10 is a perspective view schematically showing a bobbin according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0007] Hereinafter, the embodiment will be described with reference to FIGS.

[0008] (First embodiment) 1 is a refrigeration cycle circuit diagram of an air conditioner 1 according to this embodiment. The air conditioner 1 is a device that performs air conditioning using this refrigeration cycle, and is an example of a refrigeration cycle device. The air conditioner 1 is equipped with a compressor 2, a four-way valve 3, an outdoor heat exchanger 4, an outdoor blower 40, an expansion device 5, an indoor heat exchanger 6, and an indoor blower 60 as its main elements.

[0009] As shown in Figure 1, the discharge side of the compressor 2 is connected to a first port 3a of a four-way valve 3. A second port 3b of the four-way valve 3 is connected to an outdoor heat exchanger 4. The outdoor heat exchanger 4 is connected to an indoor heat exchanger 6 via an expansion device 5. The indoor heat exchanger 6 is connected to a third port 3c of the four-way valve 3. A fourth port 3d of the four-way valve 3 is connected to the suction side of the compressor 2 via an accumulator 8.

[0010] The refrigerant circulates through a circulation circuit 7 that runs from the discharge side of the compressor 2 to the suction side via an outdoor heat exchanger 4, an expansion device 5, an indoor heat exchanger 6, and an accumulator 8. The refrigerant is preferably a chlorine-free refrigerant, and examples of applicable refrigerants include R448A, R449A, R449B, R407G, R407H, R449C, R456A, R516A, R406B, R463A, R744, and HC-based refrigerants.

[0011] For example, when the air conditioner 1 operates in cooling mode, the four-way valve 3 switches so that the first port 3a communicates with the second port 3b and the third port 3c communicates with the fourth port 3d. When the air conditioner 1 starts operating in cooling mode, high-temperature, high-pressure gas-phase refrigerant compressed by the compressor 2 is discharged into the circulation circuit 7. The discharged gas-phase refrigerant passes through the four-way valve 3 and is guided to the outdoor heat exchanger 4, which functions as a condenser (heat radiator).

[0012] The gas-phase refrigerant guided to the outdoor heat exchanger 4 condenses through heat exchange with the air (outdoor air) drawn in by the outdoor blower 40, and changes into a high-pressure liquid-phase refrigerant. The high-pressure liquid-phase refrigerant is reduced in pressure as it passes through the expansion device 5, and changes into a low-pressure two-phase gas-liquid refrigerant. The two-phase gas-liquid refrigerant is guided to the indoor heat exchanger 6, which functions as an evaporator (heat absorber), and exchanges heat with the air (indoor air) drawn in by the indoor blower 60 as it passes through the indoor heat exchanger 6.

[0013] As a result, the gas-liquid two-phase refrigerant absorbs heat from the air and evaporates, changing into a low-temperature, low-pressure gas-phase refrigerant. The air passing through the indoor heat exchanger 6 is cooled by the latent heat of evaporation of the liquid-phase refrigerant, and is sent as cool air by the indoor fan 60 to the area to be air-conditioned (cooled).

[0014] The low-temperature, low-pressure gas-phase refrigerant that has passed through the indoor heat exchanger 6 is guided to the accumulator 8 via the four-way valve 3. If the refrigerant contains liquid-phase refrigerant that has not completely evaporated, it is separated into liquid and gas-phase refrigerant here. The low-temperature, low-pressure gas-phase refrigerant separated from the liquid-phase refrigerant is drawn from the accumulator 8 into the compressor 2, where it is compressed again into high-temperature, high-pressure gas-phase refrigerant and discharged into the circulation circuit 7.

[0015] On the other hand, when the air conditioner 1 operates in heating mode, the four-way valve 3 switches so that the first port 3a communicates with the third port 3c and the second port 3b communicates with the fourth port 3d. When the air conditioner 1 starts operating in heating mode, the high-temperature, high-pressure gas-phase refrigerant discharged from the compressor 2 is guided via the four-way valve 3 to the indoor heat exchanger 6, where it exchanges heat with the air passing through the indoor heat exchanger 6. In this case, the indoor heat exchanger 6 functions as a condenser.

[0016] As a result, the gas-phase refrigerant passing through the indoor heat exchanger 6 condenses and changes into high-pressure liquid-phase refrigerant by exchanging heat with the air (indoor air) drawn in by the indoor blower 60. The air passing through the indoor heat exchanger 6 is heated by the heat exchange with the gas-phase refrigerant, and is sent as warm air by the indoor blower 60 to the place to be air-conditioned (heated).

[0017] The high-temperature liquid-phase refrigerant that has passed through the indoor heat exchanger 6 is guided to the expansion device 5, and is reduced in pressure while passing through the expansion device 5, changing into low-pressure two-phase gas-liquid refrigerant. The two-phase gas-liquid refrigerant is guided to the outdoor heat exchanger 4, which functions as an evaporator, and evaporates by exchanging heat with air (outdoor air) drawn in by the outdoor blower 40, changing into low-temperature, low-pressure gas-phase refrigerant. The low-temperature, low-pressure gas-phase refrigerant that has passed through the outdoor heat exchanger 4 is drawn into the compressor 2 via the four-way valve 3 and accumulator 8, and is compressed again by the compressor 2 into high-temperature, high-pressure gas-phase refrigerant before being discharged into the circulation circuit 7.

[0018] In this embodiment, the air conditioner 1 can be operated in either cooling mode or heating mode, but the air conditioner 1 may also be, for example, a cooling-only machine or a heating-only machine that can be operated in either cooling mode or heating mode only.

[0019] Next, the specific configuration of the compressor 2 used in the air conditioner 1 will be described with reference to Fig. 2. Fig. 2 is a vertical cross-sectional view of the compressor 2. As shown in Fig. 2, the compressor 2 is a so-called vertical rotary compressor, and includes, as its main elements, a sealed container 10, a compression mechanism 11, and an electric motor 12. In the following description, the relative positional relationship between the compression mechanism 11 and the electric motor 12, which are aligned along a central axis O1 of the sealed container 10 (described later), will be used as a reference, and the side where the compression mechanism 11 is located will be referred to as the bottom, and the side where the electric motor 12 is located will be referred to as the top.

[0020] The sealed container 10 has a cylindrical peripheral wall 10a and stands perpendicular to the installation surface. The installation surface may be, for example, the bottom plate of an outdoor unit. A discharge pipe 10b is provided at the upper end of the sealed container 10. The discharge pipe 10b is connected to the first port 3a of the four-way valve 3 via the circulation circuit 7. An oil reservoir 10c for storing lubricating oil is provided at the bottom of the sealed container 10.

[0021] The compression mechanism 11 is a mechanism that compresses the refrigerant. The compression mechanism 11 is housed in the lower part of the sealed container 10 so as to be immersed in lubricating oil. In the example shown in FIG. 2, the compression mechanism 11 has a twin-cylinder structure and includes a first cylinder 13, a second cylinder 14, and a rotating shaft 15 as main elements. The first cylinder 13 and the second cylinder 14 each have a roller (rolling piston) and a vane therein. The number of cylinders in the compression mechanism is not limited to two, and may be one or three or more.

[0022] The first cylinder 13 is fixed to the inner peripheral surface of the peripheral wall 10a of the sealed container 10. The second cylinder 14 is fixed to the lower surface of the first cylinder 13 via a partition plate 18.

[0023] A first bearing 20 is fixed above the first cylinder 13. The first bearing 20 covers the inner diameter portion of the first cylinder 13 from above and protrudes upward from the first cylinder 13. The space surrounded by the inner diameter portion of the first cylinder 13, the partition plate 18, and the first bearing 20 constitutes a first cylinder chamber. The partition plate 18 corresponds to a closing member that defines the lower surface of the first cylinder chamber, and the first bearing 20 corresponds to a closing member that defines the upper surface of the first cylinder chamber.

[0024] A second bearing 22 is fixed below the second cylinder 14. The second bearing 22 covers the inner diameter portion of the second cylinder 14 from below and protrudes downward from the second cylinder 14. The space surrounded by the inner diameter portion of the second cylinder 14, the partition plate 18, and the second bearing 22 constitutes a second cylinder chamber. The partition plate 18 corresponds to a closing member that defines the upper surface of the second cylinder chamber, and the second bearing 22 corresponds to a closing member that defines the lower surface of the second cylinder chamber. The first cylinder chamber and the second cylinder chamber are arranged concentrically with the central axis O1 of the sealed container 10.

[0025] The first cylinder chamber and the second cylinder chamber are connected to the accumulator 8 via suction pipes 10d and 10e, which are part of the circulation circuit 7. The gas phase refrigerant separated from the liquid phase refrigerant in the accumulator 8 is guided to the first cylinder chamber and the second cylinder chamber through the suction pipes 10d and 10e.

[0026] The rotating shaft 15 has an axis positioned coaxially with the central axis O1 of the sealed casing 10 and penetrates the first cylinder chamber, the second cylinder chamber, and the partition plate 18. The rotating shaft 15 has a first journal portion 27a, a second journal portion 27b, and a pair of crank pin portions (eccentric portions) 28a, 28b. In other words, the rotating shaft 15 is configured as a crankshaft. The first journal portion 27a is rotatably supported by a first bearing 20. The second journal portion 27b is rotatably supported by a second bearing 22.

[0027] Furthermore, the rotating shaft 15 has an extension portion 27c that extends coaxially from the first journal portion 27a. The extension portion 27c passes through the first bearing 20 and protrudes above the compression mechanism portion 11. A rotor 33 of the electric motor portion 12, which will be described later, is fixed to the extension portion 27c. The extension portion 27c is also rotatably supported by a third bearing 24, which will be described later. As a result, the rotating shaft 15 is supported by the third bearing 24 in addition to the first and second bearings 20 and 22, and rotates around the axis (central axis O1) inside the sealed container 10.

[0028] The eccentric portions 28a, 28b are located between the first journal portion 27a and the second journal portion 27b. The eccentric portions 28a, 28b have a phase difference of, for example, 180 degrees, and have the same amount of eccentricity relative to the central axis O1 of the sealed casing 10. One eccentric portion (hereinafter referred to as the first eccentric portion) 28a is housed in the first cylinder chamber. The other eccentric portion (hereinafter referred to as the second eccentric portion) 28b is housed in the second cylinder chamber.

[0029] Rollers 16 and 17 are fitted onto the outer peripheral surfaces of first eccentric portion 28a and second eccentric portion 28b, respectively. A slight gap is provided between the inner peripheral surfaces of rollers 16 and 17 and the outer peripheral surfaces of eccentric portions 28a and 28b to allow rollers 16 and 17 to rotate relative to eccentric portions 28a and 28b. As a result, when rotary shaft 15 rotates, rollers 16 and 17 rotate eccentrically within the cylinder chamber, and part of the outer peripheral surface of rollers 16 and 17 comes into contact with the inner peripheral surface of the cylinder chamber via an oil film.

[0030] Vanes (not shown) are disposed in the first cylinder 13 and the second cylinder 14, respectively. The vanes are supported by the cylinders 13, 14 while being biased radially inward by a biasing means. The tips of each vane are slidably pressed against the outer peripheral surfaces of rollers 16, 17. These vanes cooperate with the rollers 16, 17 to divide the cylinder chambers of the cylinders 13, 14 into suction chambers and compression chambers, respectively, and move (advance and retreat) in directions extending into and retracting from the cylinder chambers as the rollers 16, 17 eccentrically rotate. As the vanes advance and retreat relative to the cylinder chambers and the rollers 16, 17 eccentrically rotate, the volumes of the suction and compression chambers of the cylinder chambers change, compressing the gas-phase refrigerant drawn into the cylinder chambers from the suction pipe.

[0031] The high-temperature, high-pressure gas-phase refrigerant compressed in each cylinder chamber of the first cylinder 13 and the second cylinder 14 is discharged into the sealed container 10 via a discharge valve mechanism (not shown), which will be described later. The discharged gas-phase refrigerant rises inside the sealed container 10. Furthermore, while the compression mechanism 11 is operating, the lubricating oil stored in the oil reservoir 10c of the sealed container 10 turns into mist and rises inside the sealed container 10 toward the discharge pipe 10b along with the flow of the gas-phase refrigerant. The sealed container 10 is equipped with an oil separator and the like that separates the lubricating oil contained in the gas-phase refrigerant rising inside the sealed container 10.

[0032] The electric motor unit 12 is a mechanism that drives the compression mechanism unit 11. The electric motor unit 12 is housed in an intermediate portion along the central axis O1 of the sealed casing 10 so as to be located between the compression mechanism unit 11 and the discharge pipe 10b. The electric motor unit 12 includes a so-called inner rotor type motor, and is equipped with a rotor 33 fixed to the rotary shaft 15 and a stator 34 fixed to the inner circumferential surface of the peripheral wall 10a of the sealed casing 10.

[0033] The rotor 33 is configured to include, for example, a cylindrical rotor core 33a fixed coaxially to the rotating shaft 15, and a plurality of permanent magnets (not shown) arranged on the rotor core 33a. The rotor 33 is arranged coaxially with the stator 34 with a small air gap provided inside the stator 34.

[0034] The stator 34 includes, for example, a cylindrical stator core 34a and windings (coils) 34b wound around the stator core 34a, and is disposed to surround the rotor 33. A plurality of slots and a plurality of teeth are alternately formed on the inner periphery of the stator core 34a. The coils 34b are wired into each slot and wound around each tooth. When current is applied to the coils 34b, the rotor 33 rotates about the central axis O1 relative to the stator 34, and the rotating shaft 15 rotates together with the rotor 33.

[0035] The rotating shaft 15 is rotatably supported by three bearings 20, 22, and 24. Of the three bearings 20, 22, and 24, the first bearing (hereinafter referred to as the first bearing) 20 is disposed in the middle in the axial direction of the rotating shaft 15. The first bearing 20 has a first flange portion 20a that defines the upper surface of the first cylinder chamber of the first cylinder 13, and a first boss portion 20b that extends upward in a cylindrical shape continuous with the first flange portion 20a. The upper surface is an end face on one end side of the first cylinder 13 in the axial direction of the rotating shaft 15 (the direction along the central axis O1 of the sealed container 10).

[0036] The second bearing (hereinafter referred to as the second bearing) 22 is disposed at the lower end in the axial direction of the rotary shaft 15. The second bearing 22 has a second flange portion 22a that defines the lower surface of the second cylinder chamber of the second cylinder 14, and a second boss portion 22b that extends cylindrically downward and is continuous with the second flange portion 22a. The lower surface is the end face on the other end side of the second cylinder 14 in the axial direction of the rotary shaft 15. In other words, the first bearing 20 corresponds to a member that closes the first cylinder chamber from above, and the second bearing 22 corresponds to a member that closes the second cylinder chamber from below.

[0037] The third bearing (hereinafter referred to as the third bearing) 24 is disposed at a predetermined position different from both the first bearing 20 and the second bearing 22 in the axial direction of the rotating shaft 15. This predetermined position is on the opposite side of the compressor mechanism 11 across the motor unit 12 in the axial direction of the rotating shaft 15 (the direction along the central axis O1 of the sealed container 10). Specifically, the upper end 15a of the rotating shaft 15, i.e., the upper end of the extension 27c of the first journal 27a, corresponds to the predetermined position. The upper end of the rotating shaft 15 is one end of the rotating shaft 15 in the axial direction.

[0038] The types of the first bearing 20, the second bearing 22, and the third bearing 24 are not particularly limited. As shown in Fig. 2, the first bearing 20 and the second bearing 22 are sliding bearings, and the third bearing 24 is a rolling bearing including an inner ring 24a, an outer ring 24b, and rolling elements 24c. The inner ring 24a and the outer ring 24b are arranged concentrically and opposite to each other about the central axis O1, with the inner ring 24a being the rotating ring and the outer ring 24b being the stationary ring. The rolling elements 24c are a plurality of balls or rollers held in a cage or the like, and roll between raceways formed on the outer periphery of the inner ring 24a and the inner periphery of the outer ring 24b.

[0039] A muffler (hereinafter referred to as "first muffler") 41 that covers the first bearing 20 is provided above the first bearing 20. The first muffler 41 suppresses pulsation and noise caused by, for example, refrigerant discharged from the compression chamber of the first cylinder 13 into the sealed container 10. The first muffler 41 covers the first bearing 20, in other words, the upper surface of the first cylinder chamber in the first cylinder 13, and forms a first muffler chamber 43 between the first bearing 20 and the first muffler 41. In addition, a muffler (hereinafter referred to as "second muffler") 42 that covers the second bearing 22 is provided below the second bearing 22. The second muffler 42 suppresses pulsation and noise caused by, for example, refrigerant discharged from the compression chamber of the second cylinder 14 into the sealed container 10. The second muffler 42 covers the second bearing 22, in other words, the lower surface of the second cylinder chamber in the second cylinder 14, and forms a second muffler chamber 44 between itself and the second bearing 22.

[0040] As shown in FIG. 2, the electric motor unit 12 also has a bobbin 26. The bobbin 26 is a component on which a coil 34b, which is wound around the stator core 34a of the stator 34, is wired. The bobbin 26 also serves as a holding component for holding the third bearing 24. As shown in FIGS. 2 and 3, the bobbin 26 is disposed on the upper surface 34c of the stator 34. FIG. 3 is a perspective view schematically illustrating the bobbin 26 attached to the upper surface 34c of the stator 34. The upper surface 34c is one end of the stator 34 in the axial direction of the rotating shaft 15 (the direction along the central axis O1 of the sealed container 10), i.e., an end face on one end side. The bobbin 26 is attached to the upper surface 34c of the stator 34 by the tension of the coil 34b wound around the stator core 34a. The material of the bobbin 26 is not particularly limited. In this embodiment, as an example, it is assumed that the bobbin 26 is formed from sheet metal. However, the bobbin 26 may be made from a material other than metal, such as resin. Note that in this embodiment, as an example, the bobbin 26 is regarded as one of the components of the electric motor unit 12, but the bobbin 26 may be a separate component independent of the electric motor unit 12.

[0041] Fig. 4 is a perspective view that schematically shows the bobbin 26. As shown in Fig. 4, the bobbin 26 is composed of three main elements: a first portion 52, a second portion 54, and a third portion 56. These portions 52, 54, and 56 are formed by processing the metal sheet that will become the bobbin 26, such as by shearing, punching, or bending. Fig. 5 is a perspective view that schematically shows the configuration of the bobbin 26 in which the first portion 52, the second portion 54, and the third portion 56 are formed by processing the metal sheet in this manner.

[0042] 2 and 3, the first portion 52 serves as a base when the bobbin 26 is attached to the top surface 34c of the stator 34, and includes a coil wiring portion 53 where the coil 34b is wired. When the coil 34b wound around the stator core 34a of the stator 34 is wired to the first portion 52, tension due to the winding acts from the coil 34b to the first portion 52. This tension acts to press and hold the first portion 52 against the top surface 34c. In this way, the bobbin 26 is attached to the stator 34 via the first portion 52.

[0043] 3 to 5, the first portion 52 has an overall outline shape that is roughly octagonal. However, the outline shape of the first portion 52 is not limited to the octagonal shape shown in the drawings. The outline shape may be any polygon that fits within the inner peripheral portion of the peripheral wall 10a of the substantially cylindrical sealed container 10, taking into consideration errors that may occur during molding of the first portion 52, for example.

[0044] The first portion 52 has an opening (first opening) 52a at the center of the octagonal contour. The opening 52a opens in a substantially circular shape that is concentric with the central axis O1 of the sealed container 10. The diameter of the opening 52a is larger than the outer diameter of the outer ring 24b of the third bearing 24.

[0045] The annular portion (first annular portion) 52b surrounding the opening 52a has a plurality of slots 52c and a plurality of teeth 52d. The slots 52c and teeth 52d form a coil wiring portion 53 in the first portion 52 where the coils 34b are wired. The slots 52c are missing portions of the annular portion 52b, and are portions where the coils 34b wound around the stator core 34a of the stator 34 are wired. The teeth 52d are part of the solid portion (non-missing portion) of the annular portion 52b, and are portions where the coils 34b wired in the slots 52c are wound. Therefore, the teeth 52d have an insulating portion on their surface to protect against the coils 34b. The insulating portion may be, for example, a component separate from the bobbin 26, or may be a coating formed by insulating the surface of the teeth 52d.

[0046] The slots 52c and teeth 52d are alternately arranged at approximately equal intervals in the circumferential direction of the opening 52a. As a result, the teeth 52d protrude toward the opening 52a relative to the annular portion of the annular portion 52b. For example, the coils 34b wound around adjacent teeth 52d in the circumferential direction are wired together in the slots 52c. The number of slots 52c and the number of teeth 52d may be the same as the number of slots in the stator core 34a, and the number of teeth 52d may be the same as the number of teeth in the stator core 34a. The slots 52c and the teeth 52d are arranged at positions corresponding to the slots in the stator core 34a and the teeth 52d, respectively. In this embodiment, as shown in FIG. 5 as an example, the annular portion 52b has nine slots 52c and nine teeth 52d.

[0047] 4 and 5, the slot 52c narrows from the outer periphery of the annular portion 52b toward the inner periphery thereof. The slot 52c communicates with the opening 52a at an open portion 52e.

[0048] Teeth 52d are each configured to include a hanging portion 52f and an upright portion 52g. Hanging portion 52f hangs down from the circumferential edge of tooth 52d and guides coil 34b wound around tooth 52d to prevent bending. Upright portion 52g rises from the tip of tooth 52d (the protruding end facing the center of opening 52a) on the opposite side (upward) from hanging portion 52f and prevents coil 34b wound around tooth 52d from falling off tooth 52d.

[0049] The annular portion 52b has a plurality of flanges 52h and a plurality of claw fixing portions 52i. The flanges 52h are portions for stabilizing the position of the bobbin 26 on the upper surface 34c of the stator 34 and are part of the solid portion of the annular portion 52b. The claw fixing portions 52i are portions for positioning and fixing second claws 54d (described later) that support the second portion 54 relative to the first portion 52. These flanges 52h and claw fixing portions 52i are alternately arranged at approximately equal intervals around the circumferential direction of the opening 52a. In this embodiment, as shown as an example in FIG. 5, the annular portion 52b has four flanges 52h and three claw fixing portions 52i, each at a position corresponding to each side of the octagonal contour. The number of flanges 52h and claw fixing portions 52i does not necessarily have to match the number of slots 52c and teeth 52d. Of the sides of the octagonal shape of the annular portion 52b, a third portion 56 is disposed at a position P52 corresponding to the remaining side on which the flange 52h and the claw fixing portion 52i are not disposed.

[0050] Flange 52h hangs down from the outer peripheral edge of annular portion 52b. In this embodiment, as shown in Fig. 5 as an example, flange 52h hangs down from the edge of one side of the octagonal contour of annular portion 52b. That is, flange 52h hangs down in the same direction as hanging portion 52f.

[0051] Claw fixing portion 52i is a part of the flesh (non-defective portion) of annular portion 52b, and stands up from the outer periphery of annular portion 52b on the opposite side (upward) from flange 52h. Claw fixing portion 52i has slit 52j. Slit 52j is a defect portion of annular portion 52b, and is a portion into which tip end 54g of second claw 54d of second portion 54, which will be described later, is inserted and caught.

[0052] 2 and 3, the second portion 54 is a portion that covers the upper part of the first portion 52, which is the base portion of the bobbin 26, and includes a bearing holding portion 55 that holds the third bearing 24. The third bearing 24 is held in the second portion 54, whereby the third bearing 24 is positioned and fixed relative to the rotating shaft 15.

[0053] 3 to 5, the second portion 54 has a rough overall outline shape of a substantially rectangular shape with rounded corners. However, the outline shape of the second portion 54 is not limited to the substantially rectangular shape shown in the drawings. Such an outline shape may be any shape that takes into consideration errors that may occur during molding of the second portion 54, as long as a portion of the second portion 54 abuts against the inner circumferential portion of the peripheral wall 10a of the substantially cylindrical sealed container 10, for example.

[0054] The second portion 54 has an opening (second opening) 54a at the center of the roughly rectangular outline. The opening 54a is open in a roughly circular shape that is concentric with the axis of the rotating shaft 15 (the central axis O1 of the sealed container 10). The diameter across the opening 54a may be large enough to allow the rotating shaft 25 to be inserted therein. In the example shown in FIGS. 3 to 5, the diameter across the opening 54a is roughly the same as or slightly larger than the outer diameter of the extension 27c of the rotating shaft 15.

[0055] The annular portion (second annular portion) 54b surrounding the opening 54a has a plurality of first claws 54c and a plurality of second claws 54d, which stand in the same direction relative to the rest of the annular portion 54b.

[0056] 3 to 5, four first claws 54c are provided at approximately equal intervals around the circumferential direction of the opening 54a. These four first claws 54c form bearing holders 55 that hold the third bearing 24 in the second portion 54. The number of first claws 54c needs to be sufficient to position and fix the third bearing 24 relative to the rotating shaft 15 and stabilize the posture of the third bearing 24. Therefore, the number of first claws 54c may be three or less, or may be five or more, and can be set as desired depending on, for example, the size and weight of the third bearing 24.

[0057] The first claw 54c is an elastic piece for holding the third bearing 24. In the present embodiment, as an example, the first claw 54c is formed by cutting and raising a portion of the annular portion 54b toward the opening 54a. The raised tip 54e of the first claw 54c is further bent toward the opening 54a in a hook-like shape. The cut-and-raised height of the first claw 54c, i.e., the standing height from the annular portion 54b, is set in accordance with the assembly width (the vertical dimension in FIG. 2) of the third bearing 24, to be equal to or greater than the assembly width, for example, to be approximately the same as the assembly width. The tip 54e is bent toward the opening 54a in a hook-like shape at this standing height position.

[0058] The distance between a pair of opposing first claws 54c of the four first claws 54c is set to be equal to or greater than the outer diameter of the third bearing 24, i.e., equal to or greater than the outer diameter of the outer ring 24b (the dimension in the left-right direction in FIG. 2), and is, for example, set to be approximately the same as the outer diameter of the outer ring 24b. As a result, the first claws 54c hold the third bearing 24 by embracing the outer ring 24b at their tip ends 54e, as shown in FIG. 6. FIG. 6 is a diagram schematically illustrating, from below, the state in which the first claws 54c hold the third bearing 24. At this time, the four first claws 54c elastically deform so as to collapse outward relative to the opening 54a, and then return to their original shape. In other words, the opposing first claws 54c elastically deform so as to move away from each other, and then return to their original shape.

[0059] 3 to 5, the annular portion 54b has through holes 54f formed at the cut-and-raised portions of the first claws 54c, the through holes 54f corresponding to the four first claws 54c. In the example shown in Figures 3 to 5, the annular portion 54b has four through holes 54f corresponding to the four first claws 54c. These through holes 54f function as passages for the refrigerant compressed by the compression mechanism 11 inside the sealed container 10, and also function as deformation allowances when the bobbin 26 is assembled to the inner peripheral portion of the peripheral wall 10a of the sealed container 10.

[0060] 3 to 5, three second claws 54d are provided on the outer circumferential edge of the opening 54a at approximately equal intervals in the circumferential direction of the opening 54a. These three second claws 54d are elastic pieces for fixing the second portion 54 to the first portion 52. The number of second claws 54d may be sufficient to position and fix the second portion 54 relative to the first portion 52 and stabilize the posture of the second portion 54. Therefore, the number of second claws 54d may be two or less, or may be four or more, and can be set as desired depending on, for example, the size and weight of the bobbin 26.

[0061] 5, the annular portion 54b has three second claws 54d at positions corresponding to three sides of the generally rectangular contour of the annular portion 54b. A third portion 56 is disposed at a position P54 corresponding to one of the generally rectangular sides of the annular portion 54b on which no second claw 54d is disposed. The positions of the three second claws 54d in the circumferential direction of the annular portion 54b correspond to the positions of the three claw fixing portions 52i in the circumferential direction of the annular portion 52b of the first portion 52.

[0062] The second claws 54d stand upright from the outer periphery of the annular portion 54b in the same direction as the first claws 54c. The tips 54g of the standing second claws 54d are bent in a hook-like shape in the same direction as the tips 54e of the first claws 54c. The height of the second claws 54d from the annular portion 54b is set so that the tips 54g can be inserted into the slits 52j when the second claws 54d reach a second state, which will be described later. The tips 54g are bent in a hook-like shape in the same direction as the tips 54e at the height of the second claws 54d. This allows the tips 54g to be inserted into the slits 52j of the claw fixing portion 52i and engage with the edges of the slits 52j. At this time, the three second claws 54d elastically deform so as to tilt outward relative to the opening 54a, and then return to their original shape.

[0063] The annular portion 54b also has multiple bracing portions 54h on its outer periphery. The bracing portions 54h correspond to the curved corners of the generally rectangular second portion 54. In the example shown in FIGS. 3 to 5, the annular portion 54b has four bracing portions 54h. These bracing portions 54h can be configured to abut against, for example, the inner periphery of a cylindrical case surrounding the stator 34 of the electric motor unit 12 or the inner periphery of the peripheral wall 10a of the generally cylindrical sealed container 10. When the bracing portions 54h are configured in this manner, the second portion 54 can be positioned and fixed by abutting, for example, the inner periphery of the cylindrical case of the stator 34. In this case, the second portion 54 is fixed to the inner periphery of the case by press-fitting, shrink-fitting, or the like so that the bracing portions 54h abut against the inner periphery of the case. In this state, the portions of the outer periphery of the annular portion 54b other than the bracing portion 54h, such as the second claw 54d and the third portion 56, do not come into contact with the inner periphery of the case or the like.

[0064] The third portion 56 is a portion of the bobbin 26 that connects the first portion 52 and the second portion 54. In the example shown in FIGS. 3 to 5, the third portion 56 connects a predetermined position P52 of the first portion 52 and a predetermined position P54 of the second portion 54. The predetermined position P52 is a position corresponding to one of the octagonal sides of the annular portion 52b of the first portion 52 that does not have the flange 52h and the claw fixing portion 52i. The predetermined position P54 is a position corresponding to one of the substantially rectangular sides of the annular portion 54b of the second portion 54 that does not have the second claw 54d.

[0065] In a first state, the third portion 56 connects the first portion 52 and the second portion 54 so that the first portion 52 and the second portion 54 are continuous on approximately the same plane. The first state is a state before the four first claws 54c of the bearing holder 55 of the second portion 54 hold the third bearing 24. FIG. 5 is a diagram showing an example of the configuration of the bobbin 26 in the first state. In a second state, the third portion 56 connects the first portion 52 and the second portion 54 so that the first portion 52 and the second portion 54 face each other in the axial direction of the rotating shaft 15 (the direction along the central axis O1). The second state is a state before the four first claws 54c of the second portion 54 hold the third bearing 24. FIGS. 3 and 4 are diagrams showing an example of the configuration of the bobbin 26 in the second state.

[0066] That is, the third portion 56 is configured to be elastically deformable during a transition from the first state to the second state. In the example shown in FIG. 4 , the third portion 56 has two deforming portions 56a, 56b arranged corresponding to the distance between the first portion 52 and the second portion 54 in the axial direction (direction along the central axis O1) of the rotation shaft 15 in the second state. The deforming portion 56a is a portion that bends upward approximately perpendicular to the annular portion 52b at a predetermined position P52 of the first portion 52 in the second state. The deforming portion 56b is a portion that bends downward approximately perpendicular to the annular portion 54b at a predetermined position P54 of the second portion 54 in the second state. These deforming portions 56a, 56b may have, for example, grooves or recesses that guide the deformation to make it easier to define the manner of deformation.

[0067] When assembling the bobbin 26 thus configured with the first section 52, the second section 54, and the third section 56 as main elements to the top surface 34c of the stator 34 as shown in Fig. 3, the following procedure may be followed, for example: In this case, the third bearing 24 is in a state where the inner ring 24a is assembled to the extension 27c of the rotating shaft 15 by press-fitting or the like.

[0068] First, in the first state shown in FIG. 5, the first portion 52 of the bobbin 26 is placed on the top surface 34c of the stator 34. At this time, the positions of the slots 52c of the first portion 52 are aligned with the positions of the slots in the stator core 34a, and the positions of the teeth 52d are aligned with the positions of the teeth in the stator core 34a. Then, the coil 34b is wound around the stator core 34a. As a result, the coil 34b is wound around the teeth 52d, and the coil 34b wound around the teeth 52d is wired. As a result, the tension of the coil 34b wound around the stator core 34a causes the bobbin 26 to be assembled to the top surface 34c of the stator 34.

[0069] Next, the third portion 56 is elastically deformed by the deformation portions 56a and 56b so that the second portion 54 faces the first portion 52 in the axial direction (the direction along the central axis O1) of the rotating shaft 15. At this time, the opening 54a of the second portion 54 is inserted into the extension portion 27c of the rotating shaft 15 while the tip portion 54e of the first claw 54c of the second portion 54 is aligned with the outer ring 24b of the third bearing 24 and the tip portion 54g of the second claw 54d is aligned with the claw fixing portion 52i of the first portion 52. At this time, the first claw 54c and the second claw 54d are elastically deformed so as to fall outward relative to the opening 54a.

[0070] Then, the third portion 56 is elastically deformed at the deformation portions 56a and 56b until it reaches the second state shown in FIGS. 3 and 4. At this time, the first claw 54c returns to its original shape so that the tip portion 54e embraces the outer ring 24b. As a result, the third bearing 24 is positioned and fixed to the rotating shaft 15 by the first claw 54c, and its posture is stabilized. Furthermore, the second claw 54d elastically returns to its original shape so that the tip portion 54g is inserted into and caught in the slit 52j of the claw fixing portion 52i. As a result, the second portion 54 is positioned and fixed to the first portion 52 by the second claw 54d, and its posture is stabilized. In this embodiment, the claw fixing portion 52i is arranged on the first portion 52 and the second claw 54d is arranged on the second portion 54, but the claw fixing portion 52i may be arranged on the second portion 54 and the second claw 54d on the first portion 52, respectively.

[0071] 2, according to this embodiment, the first bearing 20 is disposed in the middle portion of the rotating shaft 15, the second bearing 22 is disposed in the lower portion of the rotating shaft 15, and the third bearing 24 is disposed in the upper portion of the rotating shaft 15. That is, by providing the bobbin 26 with the second portion 54 including the bearing holder 55, the third bearing 24 can be disposed in the upper portion of the rotating shaft 15 by the second portion 54. As a result, the middle portion of the rotating shaft 15 can be rotatably supported by the first bearing 20 and the lower portion by the second bearing 22, and in addition, the upper portion can also be rotatably supported by the third bearing 24.

[0072] Therefore, even when the electric motor unit 12 is disposed above and the compression mechanism unit 11 is disposed below in the sealed container 10, the rotating shaft 15 can be rotatably supported above the electric motor unit 12 by the third bearing 24. Therefore, compared to a case where the upper part of the rotating shaft 15 is not supported by a bearing, for example, by disposing the third bearing 24 in addition to the first bearing 20 and the second bearing 22, the rotating shaft 15 can be supported at both ends. As a result, the whirling of the rotating shaft 15 can be suppressed, and an increase in noise due to vibration can be suppressed.

[0073] Furthermore, according to this embodiment, bobbin 26 is configured by connecting first portion 52, to which coil 34b is wired, and second portion 54, which holds third bearing 24, via third portion 56. That is, there is no need to separately procure a part for holding third bearing 24 in addition to conventional parts; it is sufficient to machine sheet metal having first portion 52, second portion 54, and third portion 56 into bobbin 26. Therefore, third bearing 24 can be positioned and fixed using bobbin 26 with a very simple configuration, and rotating shaft 15 can be supported with higher precision by three bearings 20, 22, and 24 including third bearing 24.

[0074] Additionally, according to this embodiment, the second portion 54 can be positioned and fixed to the first portion 52 by engaging the elastically deformable second claws 54d with the slits 52j of the claw fixing portion 52i. That is, by deforming the third portion 56 to transition the bobbin 26 from the first state to the second state, the second claws 54d are elastically deformed, and the second portion 54 can be positioned and fixed to the first portion 52 by the second claws 54d. Furthermore, the bearing holding portion 55 is configured as four elastically deformable first claws 54c. Therefore, by similarly transitioning the bobbin 26 from the first state to the second state, the first claws 54c are elastically deformed, and the third bearing 24 can be easily held by the first claws 54c.

[0075] The bobbin 26 according to the first embodiment described above (FIGS. 3 to 5) is merely one example of a bobbin and is not limited to the illustrated form. Hereinafter, other forms of the bobbin will be described as second to fourth embodiments. The basic components of the compressors according to the second to fourth embodiments are the same as those of the compressor 2 according to the first embodiment (FIG. 2). Therefore, the following description of the basic components of the compressor will be omitted or simplified, and only differences between the bobbin 26 of the first embodiment, which are characteristic of the bobbins according to the second to fourth embodiments, will be described in detail. In this regard, the same reference numerals will be used for components that are the same as or similar to those of the first embodiment.

[0076] (Second embodiment) Fig. 7 is a perspective view schematically illustrating a bobbin 26a according to the second embodiment. As shown in Fig. 7, the bobbin 26a, like the bobbin 26, is configured with three main elements: a first portion 52, a second portion 54, and a third portion 56.

[0077] The annular portion 54b of the second portion 54 has a plurality of first claws 54c and a plurality of second claws 54d, as well as a plurality of ribs 54i. These ribs 54i are used to adjust the rigidity of the second portion 54, or more specifically, the bobbin 26a.

[0078] In the example shown in FIG. 7, four ribs 54i are provided at approximately equal intervals in the circumferential direction of the opening 54a. These four ribs 54i are arranged one between each of the first claws 54c adjacent in the circumferential direction. In other words, the first claws 54c and the ribs 54i are arranged alternately in the circumferential direction. The ribs 54i may be any suitable arrangement as long as they can appropriately adjust the rigidity of the second portion 54, or more specifically, the bobbin 26a. Therefore, the number and size of the ribs 54i are not limited to those shown in the figure. For example, the number of ribs 54i may be three or less, or five or more.

[0079] 7, the rib 54i is formed by recessing the annular portion 54b downward (in the direction approaching the first portion 52 in the second state). The rib 54i is continuous in a curved line that substantially follows the tension portion 54h.

[0080] According to the present embodiment, by providing such ribs 54i, the rigidity of the second portion 54, or more specifically, the bobbin 26a, can be reduced by the amount of the ribs 54i compared to the first embodiment. By reducing the rigidity of the bobbin 26a in this way, for example, when assembling the bobbin 26a to the top surface 34c of the stator 34, the first claws 54c and the second claws 54d can be easily elastically deformed, thereby improving workability.

[0081] (Third embodiment) Fig. 8 is a perspective view schematically illustrating a bobbin 26b according to a third embodiment. As shown in Fig. 8, the bobbin 26b, like the bobbin 26, is composed of three main elements: a first portion 52, a second portion 54, and a third portion 56.

[0082] The annular portion 54b of the second portion 54 has a plurality of first claws 54c and a plurality of second claws 54d, as well as a plurality of ribs 54j. Similar to the ribs 54i (FIG. 7) according to the second embodiment, these ribs 54j are used to adjust the rigidity of the second portion 54, or more specifically, the bobbin 26b.

[0083] In the example shown in FIG. 8, four ribs 54j are provided at approximately equal intervals in the circumferential direction of the opening 54a. These four ribs 54j are arranged one between each pair of first claws 54c adjacent to each other in the circumferential direction. That is, the first claws 54c and the ribs 54j are arranged alternately in the circumferential direction. The ribs 54j may be any suitable arrangement as long as they can appropriately adjust the rigidity of the second portion 54, or more specifically, the bobbin 26b. Therefore, the number and size of the ribs 54j are not limited to those shown in the figure. For example, the number of ribs 54j may be three or less, or five or more.

[0084] 8, the rib 54j is formed by recessing the annular portion 54b downward (in the direction approaching the first portion 52 in the second state). The rib 54j is continuous in a substantially linear manner along the radial direction (radial direction) with respect to the center of the opening 54a.

[0085] According to the present embodiment, by providing such ribs 54j, the rigidity of the second portion 54, and therefore the bobbin 26b, can be increased by the amount of the ribs 54j compared to the first embodiment. Increasing the rigidity of the bobbin 26b in this manner makes it possible to improve, for example, the durability of the bobbin 26b.

[0086] (Fourth embodiment) Fig. 9 is a perspective view schematically illustrating a bobbin 26c according to a fourth embodiment. As shown in Fig. 9, the bobbin 26c, like the bobbin 26, is composed of three main elements: a first portion 52, a second portion 54, and a third portion 56.

[0087] The annular portion 54b of the second portion 54 has a plurality of first claws 54c and a plurality of second claws 54d, as well as a plurality of slits 54k. These slits 54k are portions (deformation allowances) for adjusting the rigidity of the second portion 54, or more specifically, the bobbin 26c. Together with the through-hole 54f, these slits 54k serve as passages within the sealed container 10 for the refrigerant compressed by the compression mechanism 11.

[0088] In the example shown in FIG. 9, four slits 54k are provided at approximately equal intervals in the circumferential direction of the opening 54a. These four slits 54k are arranged one between each of the first claws 54c adjacent in the circumferential direction. That is, the first claws 54c and the slits 54k are arranged alternately in the circumferential direction. The slits 54k may be any suitable arrangement as long as they can appropriately adjust the rigidity of the second portion 54, or more specifically, the bobbin 26c. Therefore, the number and size of the slits 54k are not limited to those shown in the figure. For example, the number of slits 54k may be three or less, or five or more.

[0089] 9, the slit 54k is formed by vertically penetrating the annular portion 54b, and is continuous in a straight line that is substantially along the tension portion 54h.

[0090] According to the present embodiment, by providing such slits 54k, the rigidity of the second portion 54, or more specifically, the bobbin 26c, can be reduced by the amount of the slits 54k compared to the first embodiment. By reducing the rigidity of the bobbin 26c in this manner, it is possible to improve the workability when assembling the bobbin 26c to the upper surface 34c of the stator 34, for example. Furthermore, since the slits 54k serve as a passage within the sealed container 10 for the refrigerant compressed by the compression mechanism 11, it is possible to improve the conductivity of the refrigerant within the sealed container 10.

[0091] Although various embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments may be embodied in various other forms, and various omissions, substitutions, and modifications may be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the inventions and their equivalents as defined in the claims.

[0092] In the above-described embodiments, the bobbins 26, 26a, 26b, and 26c are configured such that the first portion 52 and the second portion 54 are connected by the third portion 56. However, the bobbin configuration is not limited to this. For example, the portion corresponding to the third portion may be omitted, and the portions corresponding to the first portion and the second portion may be molded as separate parts and then assembled to form the bobbin. Also, in the above-described embodiments, the bobbins 26, 26a, 26b, and 26c are molded by sheet metal processing. However, the bobbins may be molded by processing resin, for example. In this case, the portions corresponding to the first portion and the second portion may be connected by the third portion, or the portion corresponding to the third portion may be omitted, and the portions corresponding to the first portion and the second portion may be configured as separate parts. [Explanation of symbols]

[0093] REFERENCE SIGNS LIST 1... air conditioner, 2... compressor, 3... four-way valve, 4... outdoor heat exchanger, 5... expansion device, 6... indoor heat exchanger, 7... circulation circuit, 8... accumulator, 10... sealed container, 11... compression mechanism section, 12... electric motor section, 13... first cylinder, 14... second cylinder, 15... rotating shaft, 15a... upper end section, 20... first bearing, 22... second bearing, 24... third bearing, 24a... inner 34a...stator core; 34b...winding (coil); 34c...upper surface (one end) of stator; 40...outdoor blower; 52...first portion; 52a...opening; Mouth portion, 52b...annular portion, 52c...slot, 52d...teeth, 52e...open portion, 52f...hanging portion, 52g...upright portion, 52h...flange, 52i...claw fixing portion, 52j...slit, 53...coil wiring portion, 54...second portion, 54a...opening, 54b...annular portion, 54c...first claw, 54d...second claw, 54e...tip portion of first claw, 54f...through hole, 54g...tip portion of second claw, 54h...tension portion, 54i, 54j...rib, 54k...slit, 55...bearing retaining portion, 56...third portion, 56a, 56b...deformed portion, 60...indoor blower, O1...central axis of sealed container, P52...connection position between first portion and third portion, P54...connection position between second portion and third portion.

Claims

1. A cylindrical sealed container; a compression mechanism unit having a rotary shaft that rotates around an axis inside the sealed container and compresses the refrigerant; an electric motor unit including a rotor fixed to the rotary shaft and a stator fixed to the inner periphery of the sealed container, surrounding the rotor, and wound with a coil, for driving the rotary shaft; a bearing that is disposed on the opposite side of the compression mechanism unit with the electric motor unit interposed therebetween in the axial direction of the rotary shaft and rotatably supports the rotary shaft; a bobbin having a first portion including a coil wiring portion to which the coil wound around the stator is wired, and a second portion including a bearing holding portion that holds the bearing, the bobbin being disposed at one end of the stator in the axial direction; the bobbin has, in addition to the first portion and the second portion, a third portion connecting the first portion and the second portion; The third portion connects the first portion and the second portion so that the first portion and the second portion are continuous on approximately the same plane in a first state before the bearing holder holds the bearing, and connects the first portion and the second portion so that the first portion and the second portion face each other in the axial direction in a second state after the bearing holder holds the bearing. Compressor.

2. The third portion has a deformed portion disposed in correspondence with the opposing distance between the first portion and the second portion in the axial direction in the second state. The compressor according to claim 1 .

3. The bearing holding portion has a first claw that elastically deforms to hold the bearing when the state transitions from the first state to the second state. The compressor according to claim 1 .

4. One of the first portion and the second portion has an elastically deformable second claw that supports the second portion relative to the first portion in the second state, and the other has a claw fixing portion that positions and fixes the second claw in the second state. The compressor according to claim 1 .

5. the first portion has an opening concentric with the rotation axis in the first state and an annular portion surrounding the opening, The coil wiring portion is a missing portion formed by partially missing an inner circumferential portion of the annular portion, and includes a plurality of slots in which the coil wound around the stator is wired, and a plurality of teeth that are part of a solid portion of the annular portion arranged between adjacent slots in the circumferential direction of the opening, and around which the coil wired in the slots is wound. The compressor according to claim 1 .

6. The plurality of teeth have insulating portions for the coils wired in the slots on the surface layer, either integrally or separately. The compressor according to claim 5.

7. A compressor according to any one of claims 1 to 6; a condenser connected to the compressor; an expansion device connected to the condenser; an evaporator connected to the expansion device; Air conditioner.

Images