JP7257831B2 - Rotary compressor and refrigeration cycle equipment - Google Patents

Description

The present invention relates to a rotary compressor and a refrigerating cycle device.

The stator and rotor of a rotation angle detector (resolver) are installed on the compressor stator and rotor, respectively, and the drive is controlled based on the rotor position information detected by this rotation angle detector. Compressors are known that

JP 2003-003963 A

A rotation angle detector, a refrigerant compression mechanism, and an electric motor for driving the compression mechanism are provided in the sealed container. The end plate of the closed container is provided with a discharge pipe for discharging the refrigerant compressed by the compression mechanism to the outside of the closed container.

The electric motor is arranged between the compression mechanism and the rotation angle detector. A rotation angle detector is arranged between the electric motor and the discharge pipe. In other words, the electric motor and the rotation angle detector are arranged between the compression mechanism and the discharge pipe. In other words, the rotation angle detector is arranged in the middle of the circulation path of the refrigerant discharged from the compression mechanism into the sealed container and leading to the discharge pipe. Therefore, the rotation angle detector may increase the pressure loss in the flow path of the gas refrigerant inside the closed container.

Accordingly, the present invention provides a rotary compressor capable of stably controlling the driving of the compressor by housing a rotation angle detector in a sealed container and suppressing the influence of the rotation angle detector on pressure loss, and a refrigerator. An object of the present invention is to provide a cycle device.

In order to solve the above problems, a rotary compressor according to an embodiment of the present invention includes a closed container, a compression mechanism provided in the closed container, an electric motor provided in the closed container, and a rotary drive of the electric motor. A rotating shaft that transmits force to the compression mechanism, a detector stator that is fixed to the closed container via a holder, and a detector rotor that is fixed to the rotating shaft, a rotation angle detector for detecting a rotation angle, wherein the electric motor includes an electric motor stator fixed to the airtight container, and an electric motor rotor integrally rotatable with the rotating shaft, the detector stator and the detector rotor is greater than or equal to the minimum clearance between the motor stator and the motor rotor, and the compression is performed from the end of the motor near the compression mechanism. A first refrigerant passage through which the refrigerant gas passes to the end on the far side from the mechanism, and a second refrigerant passage through which the refrigerant gas passes from the end on the side closer to the electric motor of the rotation angle detector to the end on the far side from the electric motor. and a refrigerant passage, wherein the passage cross-sectional area of the second refrigerant passage is greater than or equal to the passage cross-sectional area of the first refrigerant passage.

Further, the refrigeration cycle apparatus according to the embodiment of the present invention includes the rotary compressor, the radiator, the expansion device, the heat absorber, the rotary compressor, the radiator, the expansion device, and the heat absorber. a refrigerant pipe that connects the devices and circulates the refrigerant.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic diagram of the refrigerating-cycle apparatus and rotary compressor which concern on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing of the rotary compressor which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing of the rotary compressor which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing of the rotary compressor which concerns on embodiment of this invention. Sectional drawing of the rotating shaft and 2nd rotor of the rotary compressor which concern on embodiment of this invention. The top view of the rotating shaft and 2nd rotor of the rotary compressor which concern on embodiment of this invention. Sectional drawing of other examples of the rotating shaft and 2nd rotor of the rotary compressor which concern on embodiment of this invention.

An embodiment of a rotary compressor and a refrigeration cycle apparatus according to the present invention will be described with reference to FIGS. 1 to 7. FIG. In addition, the same code|symbol is attached|subjected to the structure which is the same or corresponds in several drawings.

FIG. 1 is a schematic diagram of a refrigeration cycle device and a rotary compressor according to an embodiment of the invention.

As shown in FIG. 1, a refrigeration cycle apparatus 1 according to the present embodiment includes a hermetic rotary compressor 2 (hereinafter simply referred to as "compressor 2"), a radiator 3, and an expansion device 5. , a heat absorber 6 , an accumulator 7 , and a refrigerant pipe 8 . A refrigerant pipe 8 connects the compressor 2, the radiator 3, the expansion device 5, the heat absorber 6, and the accumulator 7 in order to distribute the refrigerant.

The compressor 2 sucks in the refrigerant that has passed through the heat absorber 6 through the refrigerant pipe 8 , compresses it, and discharges high-temperature, high-pressure refrigerant to the radiator 3 through the refrigerant pipe 8 .

The compressor 2 includes a cylindrical closed container 11 placed vertically, an electric motor 12 arranged in the upper half of the closed container 11 , and a compression mechanism section 13 arranged in the lower half of the closed container 11 . , a rotating shaft 15 that transmits the rotational driving force of the electric motor 12 to the compression mechanism 13, a main bearing 16 that rotatably supports the rotating shaft 15, and a main bearing 16 that cooperates with the rotating shaft 15 to rotatably support the rotating shaft 15. and a sub-bearing 17 that

The airtight container 11 includes a vertically extending cylindrical body 11a, a panel 11b covering the upper end of the body, and a panel 11c covering the lower end of the body.

A discharge pipe 8a for discharging the refrigerant is connected to the end plate 11b on the upper side of the sealed container 11. As shown in FIG. The discharge pipe 8 a is connected to the refrigerant pipe 8 . Further, the end plate 11b on the upper side of the sealed container 11 is provided with a sealed terminal portion 18 for power supply.

The electric motor 12 generates driving force for rotating the compression mechanism portion 13 . The electric motor 12 is, for example, a DC brushless motor. The electric motor 12 is disposed inside a cylindrical first stator 21 (motor stator) fixed to the inner wall of the closed container 11 and fixed to the rotating shaft 15 so as to rotate integrally. A first rotor 22 (motor rotor) and a plurality of lead wires 23 drawn out from the first stator 21 and connected to the sealed terminal portion 18 are provided.

The first rotor 22 includes a rotor core 25 having magnet accommodation holes (not shown) and permanent magnets accommodated in the magnet accommodation holes. The first rotor 22 is rotatable with respect to the first stator 21 and supported by the rotating shaft 15 . The rotation centerline C of the first rotor 22 and the rotating shaft 15 substantially coincides with the centerline P of the first stator 21 .

The plurality of lead wires 23 are wires for supplying power to the first stator 21 through the sealed terminal portion 18, and are so-called lead wires. A plurality of lead wires 23 are wired according to the type of the electric motor 12 .

The rotating shaft 15 connects the electric motor 12 and the compression mechanism section 13 . The rotating shaft 15 transmits the rotational driving force generated by the electric motor 12 to the compression mechanism portion 13 .

An intermediate portion 15 a of the rotary shaft 15 connects the electric motor 12 and the compression mechanism portion 13 and is rotatably supported by a main bearing 16 . A lower end portion 15 b of the rotating shaft 15 is rotatably supported by a sub-bearing 17 . The main bearing 16 and the sub-bearing 17 are also part of the compression mechanism section 13 . In other words, the rotating shaft 15 passes through the compression mechanism portion 13 .

The rotary shaft 15 also has an eccentric portion 26 between the intermediate portion 15 a supported by the main bearing 16 and the lower end portion 15 b supported by the sub-bearing 17 . The eccentric portion 26 is a disc or cylinder having a center that does not coincide with the rotation centerline of the rotating shaft 15 .

The compression mechanism section 13 can compress a refrigerant, that is, a single refrigerant or a mixed refrigerant. When the electric motor 12 rotates the rotary shaft 15 , the compression mechanism section 13 sucks gaseous refrigerant from the refrigerant pipe 8 , compresses it, and discharges it into the sealed container 11 .

The compression mechanism portion 13 includes a cylinder 32 having a circular cylinder chamber 31, an annular roller 33 arranged in the cylinder chamber 31, and reciprocating motions in contact with the outer peripheral surface of the roller 33, and moves inside the cylinder chamber 31 into the suction chamber. and a blade 37 partitioning into a compression chamber.

The cylinder 32 is fixed to the sealed container 11 at a plurality of points by welding, for example, spot welding.

The cylinder chamber 31 is a space inside the cylinder 32 and is closed by the main bearing 16 and the sub-bearing 17 . The cylinder chamber 31 accommodates the eccentric portion 26 of the rotating shaft 15 .

The main bearing 16 is fixed to the cylinder 32 with a fastening member 34 such as a bolt. The main bearing 16 is provided with a discharge valve mechanism (not shown) for discharging refrigerant compressed in the cylinder chamber 31 and a discharge muffler 35 covering the discharge valve mechanism. The discharge valve mechanism opens the discharge port when the pressure difference between the pressure in the cylinder chamber 31 and the pressure in the discharge muffler 35 reaches a predetermined value due to the compression action of the compression mechanism 13 to release the compressed refrigerant. is discharged into the discharge muffler 35 . The discharge muffler 35 has a discharge hole (not shown) connecting the inside and outside of the discharge muffler 35 . The compressed refrigerant discharged into the discharge muffler 35 is discharged into the sealed container 11 through the discharge hole.

The secondary bearing 17 is fixed to the cylinder 32 with a fastening member 36 such as a bolt.

The roller 33 is fitted on the peripheral surface of the eccentric portion 26 . The roller 33 is housed inside the cylinder chamber 31 . The outer peripheral surface of the roller 33 is in line contact with the inner peripheral surface of the cylinder chamber 31 . As the rotating shaft 15 rotates, the roller 33 moves eccentrically while its outer peripheral surface is in line contact with the inner peripheral surface of the cylinder chamber 31 .

The contact between the roller 33 and the cylinder 32 is not a direct contact, but an indirect one with an oil film (not shown) of the lubricating oil 39 interposed. The contact made is simply referred to as "contact". The same applies between roller 33 and eccentric 26 , between roller 33 and main bearing 16 , and between roller 33 and sub-bearing 17 .

The suction pipe 7 a is connected to the cylinder chamber 31 of the cylinder 32 through the closed container 11 . The cylinder 32 is provided with a suction hole (not shown) that is connected to the suction pipe 7 a and reaches the cylinder chamber 31 .

The compression mechanism part 13 is housed in the closed container 11 and arranged in the lower part of the closed container 11 . The lower portion of the sealed container 11 is filled with lubricating oil 39 . Most of the compression mechanism 13 is immersed in the lubricating oil 39 inside the sealed container 11 .

The compressor 2 also includes a rotation angle detector 41 that detects the rotation angle of the rotating shaft 15 and a holder 42 that supports the rotation angle detector 41 inside the sealed container 11 .

The rotation angle detector 41 is provided on the upper end portion 15c of the rotating shaft 15. As shown in FIG. The first distance L1 between the first stator 21 of the electric motor 12 and the rotation angle detector 41 is determined by the end plate 11b of the pair of end plates 11b and 11c of the sealed container 11 which is closer to the rotation angle detector 41, that is, the upper side. is shorter than the second distance L2 between the top of the end plate 11b and the rotation angle detector 41.

The rotation angle detector 41 detects the rotation angle of the rotating shaft 15 , the rotation angle of the first rotor 22 of the electric motor 12 , the rotation angle of the eccentric portion 26 of the compression mechanism section 13 , and the rotation angle of the roller 33 . The rotation angle detector 41 is a so-called inner rotor type resolver. The rotation angle detector 41 may continuously detect the rotation angle of the rotation shaft 15, or partially detect the rotation angle of the rotation shaft 15 and estimate the rotation angle from the results. It can be.

The rotation angle detector 41 includes an annular second stator 45 (detector stator) fixed to the inner wall of the closed container 11 via a holder 42, 15 and a second rotor 46 (detector rotor) fixed to rotate integrally.

The second rotor 46 is fixed to the upper end portion 15 c of the rotating shaft 15 . Therefore, the second rotor 46 , the first rotor 22 of the electric motor 12 , and the eccentric portion 26 of the rotating shaft 15 are integrated via the rotating shaft 15 .

The second stator 45 has coils (not shown).

When the electric motor 12 operates and the first rotor 22 rotates, the second rotor 46 also rotates. A voltage having a phase difference is induced in the second stator 45 by the rotation of the second rotor 46 .

A drive circuit (not shown) of the compressor 2 acquires the induced voltage waveform output from the second stator 45 and calculates the rotation angle of the second rotor 46 . The compressor drive circuit controls the electric motor 12 based on the rotation angle of the second rotor 46, that is, the rotation angle of the first rotor 22 of the electric motor 12, and rotates the compressor 2 driven by the electric motor 12. Control.

Next, the electric motor 12 will be explained.

FIG. 2 is a cross-sectional view of a rotary compressor according to an embodiment of the invention, taken along line II-II of FIG.

As shown in FIG. 2 in addition to FIG. 1, the compressor 2 according to the present embodiment includes a gap 51 between the closed container 11 and the electric motor 12 and a gap 52 inside the electric motor 12. It has a first refrigerant passage 53 through which the refrigerant gas passes from the end closer to 13 (that is, the lower end) to the end that is farther from the compression mechanism section 13 (that is, the upper end).

The first coolant passage 53 is defined by a gap 51 between the sealed container 11 and the first stator 21, a gap 52 between the first stator 21 and the first rotor 22, and between windings in the slots of the first stator 21. It includes a gap 54 and a through hole 55 provided in the first rotor 22 . These gaps 51 , 52 , 54 , and through holes 55 of the first rotor 22 are substantially uniform in shape (passage cross-sectional area) and penetrate from the lower end of the electric motor 12 to the upper end of the electric motor 12 . there is

Next, the rotation angle detector 41 will be explained.

3 is a cross-sectional view of a rotary compressor according to an embodiment of the present invention, taken along line III-III of FIG. 1. FIG.

As shown in FIG. 3 , the rotation angle detector 41 of the compressor 2 according to this embodiment has a gap 61 between the second stator 45 and the second rotor 46 .

The second stator 45 includes a plurality of teeth 62 that are arranged at equal intervals in the circumferential direction and protrude radially inward, that is, toward the second rotor 46 . A winding 63 is wound around each tooth 62 .

The second rotor 46 has a shape that causes a change in gap permeance between itself and the second stator 45 as the rotary shaft 15 rotates. and a recessed portion 66. The second rotor 46 of the present embodiment has a plurality of radially outwardly projecting protrusions, for example three protrusions, that is, three poles 65 . The plurality of poles 65 are radially spaced apart at substantially equal intervals in the circumferential direction.

The number of poles of the first rotor 22 of the electric motor 12 is the number of poles 65 of the second rotor 46 of the rotation angle detector 41, that is, the number of protruding portions protruding radially outward of the second rotor 46. Equal numbers or integer multiples of poles 65 are preferred.

It is preferable that the magnetic pole center position of the first rotor 22 and the circumferential position of the poles 65 of the second rotor 46 of the rotation angle detector 41 substantially match.

The magnetic pole center position of the first rotor 22 generally coincides with the bisector of the pole center angle with respect to the rotation center line C of the first rotor 22 . In the 6-pole first rotor 22, it passes through the center in the circumferential direction of the poles arranged every 60 degrees of the central angle. In the 4-pole first rotor 22, it passes through the center in the circumferential direction of the poles arranged every 90 degrees of the central angle. The poles of the first rotor 22 may be composed of multiple permanent magnets.

The circumferential position of the poles 65 of the second rotor 46 is the farthest point from the rotation centerline of the second rotor 46 (corresponding to the rotation centerline C of the first rotor 22), that is, the most protruding position. .

In other words, when viewed in the axial direction of the rotating shaft 15 , the bisector of the central angle of the poles of the first rotor 22 with respect to the rotation centerline C passes through the most protruding position of the second rotor 46 .

Also, the number of poles 65 of the second rotor 46 is preferably the same as the number of cylinder chambers 31 of the compression mechanism 13 or an integral multiple of the number of cylinder chambers 31 .

It is preferable that the eccentric direction of the eccentric portion 26 and the circumferential position of the poles 65 of the second rotor 46 of the rotation angle detector 41 substantially match.

The holder 42 has an annular holding portion 71 that holds the second stator 45 of the rotation angle detector 41 on the inner peripheral surface 71a, and projects radially from the outer periphery of the holding portion 71 and is fixed to the inner surface 11d of the sealed container 11. a plurality of legs 72;

For example, three legs 72 are provided. The leg portions 72 are provided at equal intervals around the holding portion 71 and extend radially outward.

Therefore, a gap 75 is provided between the sealed container 11 and the holder 42 .

That is, the compressor 2 includes the gap 75 between the closed container 11 and the holder 42 and the gap 61 inside the rotation angle detector 41, and the end of the rotation angle detector 41 near the electric motor 12 (that is, the lower end) ) to the far end from the electric motor 12 (that is, the upper end).

The gap 75 penetrates from the lower end of the holder 42 to the upper end of the holder 42 with a substantially uniform shape (passage cross-sectional area). The gap 61 penetrates from the lower end of the rotation angle detector 41 to the upper end of the rotation angle detector 41 with a substantially uniform shape (passage cross-sectional area).

The passage cross-sectional area of the second refrigerant passage 77 is greater than or equal to the passage cross-sectional area of the first refrigerant passage 53 . In other words, the cross-sectional area of the second refrigerant passage 77 far from the compression mechanism 13 and close to the discharge pipe 8a of the closed container 11 is the first refrigerant passage close to the compression mechanism 13 and far from the discharge pipe 8a of the closed container 11. 53 passage cross-sectional area or more.

Also, the minimum clearance GminR (Fig. 1) between the second stator 45 and the second rotor 46 is the minimum clearance GminM (Fig. 2) between the first stator 21 and the first rotor 22. That's it.

2, and the minimum clearance between the second stator 45 and the second rotor 46 in FIG. The illustrated position of GminR is just an example, and the positions for determining the respective minimum gap amounts may be other positions.

Furthermore, the maximum outer diameter DR1 of the first rotor 22 of the electric motor 12 is substantially the same as the maximum outer diameter DR2 of the second rotor 46 of the rotation angle detector 41, or the second stator of the rotation angle detector 41. 45 is set to be greater than or equal to the maximum outer diameter DS2. Note that when the maximum outer diameter DR1 of the first rotor 22 of the electric motor 12 is set to be equal to or larger than the maximum outer diameter DS2 of the second stator 45 of the rotation angle detector 41, the maximum outer diameter DR1 of the holding portion 71 of the holder 42 is It is preferably larger than the outer diameter.

FIG. 4 is obtained by further providing a pressing plate 82 to the embodiment of FIG.

4, the second stator 45 of the rotation angle detector 41 is shown in a simplified manner, and the second rotor 46 is omitted.

As shown in FIG. 4 , the holder 42 of the compressor 2 according to this embodiment has a concave portion 81 (counterbore portion) that accommodates the second stator 45 of the rotation angle detector 41 . The concave portion 81 is a circular recess concentric with the annular holding portion 71 and is provided in the holding portion 71 . The recessed portion 81 is open upward from the sealed container 11 . In other words, the recessed portion 81 is open toward the upper end plate 11b of the sealed container 11 .

An annular pressing plate 82 is attached to the holding portion 71 with screws 83 . The retainer plate 82 prevents the second stator 45 of the rotation angle detector 41 arranged in the recess 81 of the holder 42 from slipping out of the recess 81 . It is preferable that the pressing plate 82 does not cover the gap 61 between the second stator 45 and the second rotor 46 . A gap 61 between the second stator 45 and the second rotor 46 extends vertically through the sealed container 11 without being obstructed by the pressing plate 82 .

FIG. 5 is a cross-sectional view of the rotating shaft and second rotor of the rotary compressor according to the embodiment of the present invention.

FIG. 6 is a plan view of the rotating shaft and second rotor of the rotary compressor according to the embodiment of the present invention.

As shown in FIGS. 5 and 6, the second rotor 46 of the compressor 2 according to this embodiment is fixed to the upper end portion 15c of the rotating shaft 15. As shown in FIGS. The rotating shaft 15 has a positioning stepped portion 85 that determines the insertion position of the second rotor 46 in its axial direction, and a positioning convex portion 86 in its circumferential direction (that is, the rotation direction of the second rotor 46). there is The second rotor 46 has a hole 87 into which the upper end portion 15c of the rotating shaft 15 can be inserted, and the insertion depth of which is determined by the positioning step portion 85. and a positioning concave portion 88 into which the positioning convex portion 86 is fitted.

The second rotor 46 is joined to the upper end portion 15c of the rotating shaft 15 by shrink fitting.

FIG. 7 is a cross-sectional view of another example of the rotating shaft and second rotor of the rotary compressor according to the embodiment of the present invention.

As shown in FIG. 7, the compressor 2 according to the present embodiment includes a pressing plate 91 that presses the second rotor 46 inserted into the upper end portion 15c of the rotating shaft 15 against the positioning step portion 85 of the rotating shaft 15. , a fastening member 92 , such as a screw, for fixing the pressing plate 91 to the top of the rotary shaft 15 .

The second rotor 46 is coupled to the upper end portion 15 c of the rotating shaft 15 by a force acting from a fastening member 92 tightened to the top of the rotating shaft 15 via a pressing plate 91 .

5 and 7, the depth of insertion of the second rotor 46 into the rotary shaft 15 is determined by the positioning step portion 85, and the unevenness (positioning convex portion) 86, positioning concave portion 88, FIG. 5) and the member (pressing plate 91, fastening member 92, FIG. 7) that presses the second rotor 46 against the positioning step portion 85. is located.

The second rotor 46 also functions as an oil separation disk that separates the lubricating oil mixed in the gas refrigerant compressed by the compression mechanism 13 and discharged into the sealed container 11 . The compressor 2 thus comprises a rotation angle detector 41 having a second rotor 46 which also functions as an oil separation disc. As such, the compressor 2 does not require an oil separation disc with independent function. If it is possible to eliminate the oil separation disc having a single function, the total length (shaft length) of the rotary shaft 15 can be shortened. Therefore, the shaft vibration of the rotating shaft 15 is suppressed, the reliability of the compressor 2 is improved by reducing the number of parts, and the cost of the compressor 2 is reduced.

Thus, in the refrigeration cycle device 1 and the compressor 2 according to the present embodiment, the passage cross-sectional area of the first refrigerant passage 53 that allows the refrigerant gas to pass through in the vertical direction of the electric motor 12 (the direction along the rotating shaft 15, the axial direction) The second refrigerant passage 77 having the passage cross-sectional area described above is provided, and allows the refrigerant gas to pass through the rotation angle detector 41 in the vertical direction (the direction along the rotating shaft 15, the axial direction). Therefore, the refrigeration cycle apparatus 1 and the compressor 2 feed back the rotation angle information obtained from the rotation angle detector 41 to the operation control of the electric motor 12, optimize the amount of current to the electric motor 12 and the timing of power supply, The electric motor 12 can be operated with high efficiency. Optimizing the operation control of the electric motor 12 also reduces vibrations induced by the electric motor 12 . In other words, the refrigeration cycle device 1 and the compressor 2 can achieve high performance, low vibration, and low noise.

Furthermore, the refrigeration cycle device 1 and the compressor 2 according to the present embodiment can reduce the pressure loss in the path along which the gas refrigerant discharged from the compression mechanism portion 13 reaches the discharge pipe 8a of the compressor 2 . Such a reduction in pressure loss within the closed container 11 contributes to higher performance of the compressor 2 .

Further, in the refrigeration cycle apparatus 1 and the compressor 2 according to the present embodiment, the minimum clearance between the second stator 45 and the second rotor 46 of the rotation angle detector 41 is It is equal to or larger than the minimum clearance between the child 21 and the first rotor 22 . In other words, the minimum clearance between the second stator 45 and the second rotor 46 near the free end of the rotary shaft 15 supported by the main bearing 16 and the secondary bearing 17 is the free end of the rotary shaft 15. is greater than or equal to the minimum clearance amount between the first stator 21 and the first rotor 22, which is farther from. Therefore, the refrigeration cycle device 1 and the compressor 2 can prevent contact between the second stator 45 and the second rotor 46 due to deflection of the rotary shaft 15 during operation of the compressor 2 . That is, the reliability of the refrigerating cycle device 1 and the compressor 2 is not lowered by mounting the rotation angle detector 41 .

Furthermore, in the refrigeration cycle apparatus 1 and the compressor 2 according to the present embodiment, the outer diameter DR1 of the first rotor 22 of the electric motor 12 is substantially the same as the outer diameter DR2 of the second rotor 46 of the rotation angle detector 41. or greater than the outer diameter DS2 of the second stator 45 of the rotation angle detector 41 . By the way, in the refrigerating cycle device 1 and the compressor 2, in the manufacturing process, a gauge is inserted into the gap between the first stator 21 and the first rotor 22 to check (inspect) the gap amount, and the second stator 45 and the second rotor 46 to check (inspect) the amount of clearance. At that time, in the refrigeration cycle apparatus 1 and the compressor 2, the gap between the first stator 21 and the first rotor 22 is detected through the gap between the second rotor 46 and the second stator 45 of the rotation angle detector 41. can be inserted into the gap between the first stator 21 and the first rotor 22 through the gap between the second stator 45 of the rotation angle detector 41 and the closed container 11 . Therefore, the refrigerating cycle device 1 and the compressor 2 collectively cover the gap between the first stator 21 and the first rotor 22 and the gap between the second stator 45 and the second rotor 46 with a single gauge. It is possible to check and manage gaps.

Further, the refrigerating cycle apparatus 1 and the compressor 2 according to the present embodiment have an annular holding portion 71 that holds the second stator 45 of the rotation angle detector 41 on the inner peripheral surface 71a, and A holder 42 having a plurality of legs 72 projecting radially and fixed to the inner surface 11 d of the sealed container 11 is provided. Therefore, the refrigeration cycle device 1 and the compressor 2 reliably hold the rotation angle detector 41 in the closed container 11, and the second stator Contact between 45 and second rotor 46 can be more reliably prevented.

Therefore, according to the refrigeration cycle apparatus 1 and the compressor 2 according to the present embodiment, the rotation angle detector 41 can be accommodated in the sealed container 11 to stably control the driving of the compressor 2, and the rotation angle detector 41 can be suppressed.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 1... Refrigeration cycle apparatus, 2... Rotary compressor, 3... Radiator, 5... Expansion device, 6... Heat absorber, 7... Accumulator, 7a... Suction pipe, 8... Refrigerant pipe, 8a... Discharge pipe, 11... Closed container 11a Body portion 11b End plate 11c End plate 11d Inner surface 12 Electric motor 13 Compression mechanism 15 Rotating shaft 15a Intermediate portion 15b Lower end portion 15c Upper end portion DESCRIPTION OF SYMBOLS 16... Main bearing, 17... Sub bearing, 18... Sealed terminal part, 21... First stator, 22... First rotor, 23... Lead wire, 25... Rotor core, 26... Eccentric part, 31... Cylinder Chamber 32 Cylinder 33 Roller 34 Fastening member 35 Discharge muffler 36 Fastening member 39 Lubricating oil 41 Rotation angle detector 42 Holder 45 Second stator 46 Second rotor 51 Gap between closed container and electric motor 52 Gap inside electric motor 53 First refrigerant passage 55 Through hole 61 Gap between second stator and second rotor 62... Teeth, 63... Winding, 65... Pole, 66... Recessed portion, 71... Holding portion, 71a... Inner peripheral surface, 72... Leg, 75... Gap between sealed container and holder, 77... Second refrigerant passage , 81... Recess 82... Pressing plate of second stator 85... Positioning step 86... Positioning protrusion 87... Hole of second rotor 88... Positioning recess 91... Second rotor pressing plate, 92 ... fastening member.

Claims (5)

a closed container;
a compression mechanism provided in the closed container;
an electric motor provided in the closed container;
a rotating shaft that transmits the rotational driving force of the electric motor to the compression mechanism;
a rotation angle detector that has a detector stator fixed to the closed container via a holder and a detector rotor fixed to the rotation shaft, and that detects the rotation angle of the rotation shaft; prepared,
The electric motor includes an electric motor stator fixed to the closed container, and an electric motor rotor integrally rotating with the rotating shaft,
a minimum clearance between the detector stator and the detector rotor is greater than or equal to a minimum clearance between the motor stator and the motor rotor;
a first refrigerant passage through which refrigerant gas passes from an end of the electric motor on a side closer to the compression mechanism to an end on a side farther from the compression mechanism;
a second refrigerant passage through which a refrigerant gas passes from an end of the rotation angle detector closer to the electric motor to an end farther from the electric motor;
The rotary compressor, wherein the cross-sectional area of the second refrigerant passage is greater than or equal to the cross-sectional area of the first refrigerant passage. The sealed container has a cylindrical body and end plates provided at both ends of the body,
The first distance between the motor stator of the electric motor and the rotation angle detector is the distance between the top of the end plate of the closed container that is closer to the rotation angle detector and the rotation angle detector. 2. The rotary compressor of claim 1 which is less than the second distance between. 2. An outer diameter of an electric motor rotor of said electric motor is substantially the same as an outer diameter of a detector rotor of said rotation angle detector or is equal to or greater than an outer diameter of a detector stator of said rotation angle detector. Or the rotary compressor according to 2 . The holder has an annular holding portion for holding the detector stator of the rotation angle detector on its inner peripheral surface, and a plurality of leg portions projecting radially from the outer periphery of the holding portion and fixed to the inner surface of the closed container. The rotary compressor according to any one of claims 1 to 3 , comprising: A rotary compressor according to any one of claims 1 to 4 ;
a radiator;
an inflator;
a heat absorber;
A refrigeration cycle apparatus comprising: a refrigerant pipe that connects the pre-rotary compressor, the radiator, the expansion device, and the heat absorber and circulates the refrigerant.

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