KR0151432B1 - Rotary compressor and refrigerator, freezing device and airconditioner using the compressor - Google Patents

Abstract

The present invention is to improve the frame rigidity of the tightening connection portion to the fixed frame of the rotary compressor system, and to provide a rotary compressor that can stably maintain the rotary compressor system in a sealed container and a refrigerator, a freezer and an air conditioner using the compressor. In the related art, in the rotary compressor (11) containing the electric motor (21) in the sealed container (20) and the rotary compressor (22) driven by the electric motor (21), the inner side of the sealed container (20). In a plurality of places spaced apart from the flange portion 31b of the main bearing 31 of the rotary compressor system 33 and the cylinder 33 in the circumferential direction. It is characterized by fixing by simultaneous tightening.

Description

Rotary compressors and refrigerators and freezers using these rotary compressors

1 is a refrigeration cycle diagram showing an example in which the rotary compressor according to the present invention is applied to an air conditioner.

2 is a longitudinal sectional view showing one embodiment of a rotary compressor according to the present invention.

3 is a partial cross-sectional view showing a structure in which a rotary compressor system is fixed and attached to a hermetic container in a rotary compressor according to the present invention.

Figure 4a is a plan view of a fixed frame fixed to the sealed container.

4b and 4c are plan views showing a main bearing and a cylinder (cylinder block) respectively fastened to a fixed frame.

5 is a view showing an average noise level of the rotary compressor according to the present invention in comparison with a conventional compressor.

6 is a view showing the average noise level when the R134a refrigerant is used in the rotary compressor according to the present invention compared with the average noise level used when the R22 refrigerant and the R134a refrigerant are used in the conventional compressor.

7 is a view showing an average noise level when using an ester oil in a rotary compressor according to the present invention compared with the average noise level of a conventional compressor using mineral oil and ester oil.

8 is a view showing a modification of the main bearing of the rotary compressor system assembled to the rotary compressor according to the present invention.

9 is a view showing a rotary compressor in which a further low noise countermeasure is applied to the rotary compressor according to the present invention.

10 is a view showing a refrigeration cycle of a refrigerator equipped with a rotary compressor according to the present invention.

11 is a perspective view schematically showing a refrigeration cycle of the refrigerator shown in FIG.

12 is a longitudinal sectional view showing another embodiment of a rotary compressor according to the present invention.

13 is a view briefly showing a fixed attachment support structure of the rotary compressor shown in FIG.

FIG. 14 is a side view of the fixed attachment support structure of FIG. 13 as viewed from the left. FIG.

FIG. 15 is a side view of the fixed attachment support structure of FIG. 13 viewed from the right.

FIG. 16 is a cross sectional view along line XVI-XVI in FIG. 12;

FIG. 17 is a view showing the average sound pressure level of the rotary compressor shown in FIG. 12 compared with the average sound pressure level of a conventional compressor.

18 is a view showing a structure in which a rotary compressor system is attached to an airtight container in a conventional rotary compressor.

19A is a plan view showing a fixing frame fixed to the sealed container of the rotary compressor shown in FIG.

19B and 19B are plan views showing cylinders fixed to the fixed frame and main bearings fixed to the cylinders, respectively.

* Explanation of symbols for main parts of the drawings

10, 10A: Refrigeration cycle 11, 11A: Rotary compressor

12: 4-way switching valve 13: Outdoor side heat exchanger

14 decompression device 15 indoor heat exchanger

16: accumulator 20: airtight container

20a: main body case 20b, 20c: cover case

21: motor 22: rotary compressor system

23: stator 24: rotor

25: axis of rotation 26: stator winding

29: power terminal 30: fixed frame

30a: fixed part 30b: inner peripheral flange part

31: main bearing 31a, 32a: boss

31b, 32b: Flange 32: sub-bearing

33: cylinder block (cylinder) 35: cylinder chamber

36: piston roller 38, 63: section pipe

40, 41: discharge chamber 42: connection port

44: lubricating oil (refrigeration base oil) 45: oil pump

47: rib portion 48: fixing hole

50: blade groove 55: foam

60: condenser 61: pressure reducing device

62 evaporator 66 evaporation pipe

67: subcapacitor 68: oil cooler

69: main capacitor 70: clean pipe

72: capillary tube 77: body casing

78: machine room 85: oil pump

91, 95: support device

The present invention relates to a rotary compressor in which a rotary compressor system is fixed to a sealed container, and a refrigerator and a freezing device using the rotary compressor.

Refrigeration apparatuses such as refrigeration showcases, refrigerators and air conditioners are provided with a refrigeration cycle including a compressor, a condenser, a decompression device such as a capillary tube, and an evaporator.

As a compressor installed in this refrigeration cycle, for example, there is a rotary compressor disclosed in Japanese Utility Model Publication No. 51-50307. This rotary compressor houses an electric motor and a rotary compressor system driven by the electric motor in a sealed container.

The rotary compressor system is fixed in the sealed container a as shown in FIG. Specifically, as shown in the flange part 31b, FIG. 18 and FIG. 19a, 19b, 19c, the fixing frame b is inserted in the inside of the airtight container a, and it fixed by welding and this fixing frame b After bolting the cylinder (d) to the inner circumferential flange (c), the flange (f) of the main bearing (e) is fixed to the cylinder (d) by bolting. The main bearing (e) is fixed to the fixed frame (b) via the cylinder (d).

In the conventional compressor, the rotary compressor (g) is fixed to the sealed container (a) by fixing the cylinder (d) directly to the fixed frame (b) fixed to the sealed container (a) by bolting, and then fixing it. The fixing system which fixes the flange part f of the main bearing e to the cylinder d from inside is employ | adopted.

In the fixed method of the rotary compressor system employed in the conventional rotary compressor, the tightening connection of the cylinder (d) and the fixing frame (b) has an inner diameter of the hermetic container (a) and a flange part (f) of the main bearing (e). It is formed in the annular part in between. In order to reduce the size and compactness of the rotary compressor, the gap between the outer diameter of the flange portion (f) of the main bearing (e) and the inner diameter of the sealed container (a) becomes narrow, and thus the tightening connection of the fixed frame (b) Insufficient strength of the flange width) may result in a lack of strength of the fixing frame b, or the main bearing e may be fixed to the fixing frame b through the cylinder d to fix the main bearing e. The longer the path (path), the more stable the main bearing (e) may be, which may cause vibration, or even cause an unbalance in the motor clearance between the stator and the rotor of the motor. There was a problem that the compressor performance could not be maintained sufficiently.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to improve the frame rigidity of the tightening connection portion to the fixed frame of the rotary compressor system, and a rotary compressor capable of stably maintaining the rotary compressor system in a sealed container. And a refrigerator and a refrigerating device using the compressor.

Another object of the present invention is to improve the frame rigidity of the tightening connection portion for the fixed frame of the rotary compressor system and to maintain the rotary compressor system and the motor in a sealed container to improve the compressor performance and improve the reliability of the rotary compressor It is to provide a refrigerator and a freezing device using a compressor.

Still another object of the present invention is to provide a rotary compressor which stably fixes a rotary compressor system in a sealed container to reduce compressor noise and vibration, and a refrigerator and a freezing device using the compressor.

Another object of the present invention is to provide a compact, compact and low noise rotary compressor.

The rotary compressor according to the present invention is a rotary compressor containing an electric motor and a rotary compressor system driven by the electric motor in a sealed container, wherein a fixed frame is provided inside the sealed container, and the rotary compressor system is mounted on the fixed frame. The flange part of the main bearing and the cylinder are fixed by simultaneous tightening in multiple places at intervals in the circumferential direction.

In addition, the rotary compressor according to the present invention has a plurality of ribs in which the flange portion of the main bearing protrudes in the radial direction, and is provided by drilling a fixing hole for simultaneous tightening in the rib portion.

In addition, in the rotary compressor according to the present invention, the main bearing has an outer diameter of the flange portion substantially equal to the inner diameter of the sealed container.

In addition, the rotary compressor according to the present invention uses a refrigeration oil containing ester oil in the lubricating oil for lubricating the sliding portion of the rotary compressor system.

In addition, the rotary compressor according to the present invention uses HFC refrigerants such as R134a as the refrigerant for compressors compressed by the rotary compressor system.

The rotary compressor of the present invention as described above is provided with a fixed frame inside the sealed container, and the fixed frame is simultaneously tightened in a plurality of places spaced apart in the circumferential direction by the main bearing flange portion of the rotary compressor system. Since the main bearing and the cylinder can be directly fastened to the fixed frame at the same time, the work efficiency can be improved, while the fixed frame can secure sufficient frame width and the frame strength can be increased to increase the frame rigidity. . Since the main bearing and the cylinder can be stably fixed to the fixed frame having high frame rigidity, vibration of the rotary compressor system and the motor can be reduced, and compressor noise and vibration can be reduced.

In addition, this rotary compressor can fix the flange part of the main bearing directly to the fixed frame, which can reduce the size and compactness of the rotary compressor. Even if it is miniaturized or compact, the frame width of the fixed frame is sufficiently secured to increase the frame strength. Therefore, it is possible to maintain the rigidity of the frame to maintain the main bearing and the rotary compressor system stably, and to improve the compressor performance and the reliability of the rotary compressor by balancing the motor distance between the stator and the rotor of the motor. have.

In addition, in the rotary compressor of the present invention, the flange portion of the main bearing has a plurality of rib portions projecting outward in the radial direction and is installed by drilling a fixing hole for simultaneous tightening in the rib portion, thereby eliminating the unnecessary thickness of the main bearing, thereby saving material. The main bearing and the cylinder are fixed directly to the fixed frame, so that the frame width can be secured and the frame strength can be increased. The vibration of the rotary compressor system can be reduced to reduce the compressor noise and vibration. You can do it.

In addition, since the main bearing is directly and stably fixed to the fixed frame of the hermetically sealed container, it is possible to maintain the rotating shaft supported by the main bearing stably and balance the motor spacing of the motor to improve the compressor performance and improve reliability.

By forming the outer weave of the flange part of the main bearing approximately the same as the inner diameter of the sealed container, and stably and firmly fixing the main bearing to the fixed frame of the sealed container, it reduces vibration of the rotary compressor system and reduces compressor noise and vibration. You can do it.

In addition, when the main bearing is stably fixed, the maintenance of the rotating shaft supported by the main bearing is stabilized and the motor interval of the motor is balanced, thereby improving the compressor performance and improving the reliability.

The rotary compressor of the present invention has excellent heat resistance by using a lubricating oil for lubricating the sliding part of a rotary compressor system and a refrigeration oil containing ester-based oil. On the other hand, the ester-based oil and the like have a noise transfer rate compared to the mineral oils conventionally used. High noise level in the entire frequency range, but by keeping the rotary compressor system in a sealed container stably and balancing the motor spacing of the motor, there is no problem in practical use even when using a refrigerator oil containing ester oil. Properties are obtained.

In the rotary compressor of the present invention, HFC (hydrochlorofluorocarbon) refrigerant such as R134a is used as the refrigerant for the compressor.

For example, HFC refrigerants have a higher noise transfer rate than conventional CFC (chlorofluorocarbon) refrigerants, but in the rotary compressor of the present invention, the rotary compressor system is stably held in a sealed container and the motor spacing of the motor is balanced. Even if a coolant or the like is used, a silent characteristic without practical problems is obtained.

In addition, in the rotary compressor of the present invention, even when using a refrigeration oil and an HFC refrigerant (HFC single refrigerant or HFC mixed refrigerant) containing a refrigeration oil having a higher noise transfer rate than conventional mineral oil and CFC refrigerants, the noise level is not improved. Silent characteristics are obtained without any problems in practical use.

Refrigerators and freezers equipped with the rotary compressor of the present invention, since the noise and vibration of the compressor is reduced, it operates quietly and stably.

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

1 shows an example in which a rotary compressor according to the present invention is applied to a refrigeration cycle of an air conditioner. The refrigeration cycle 10 includes a rotary compressor 11, a four-way switching valve 12, and an outdoor heat exchanger 13. ), A pressure reducing device (14) such as an expansion valve and a capillary tube, and an indoor side heat exchanger (15) are sequentially connected, and the refrigerant circulation is returned from the four-way switching valve (12) to the rotary compressor (11) via the accumulator (16). It constitutes a circuit.

By discharging the high pressure, high temperature refrigerant compressed by the rotary compressor (11) to the refrigerant circulation circuit, and switching the four-way switching valve (12), the indoor side heat exchanger (15) can perform room cooling and heating. . Cooling operation is indicated by solid arrows and heating operation is indicated by dashed arrows.

On the other hand, the rotary compressor 11 provided in the refrigerating cycle 10 of the air conditioner is configured as shown in FIG. 2, and the rotary compressor 11 is, for example, a vertically mounted rotary compressor, which is a sealed container 20. In the upper part, the motor 21 is accommodated in the upper part, and the rotary compressor system 22 driven by the electric motor 21 is accommodated in the lower part.

The sealed container 20 of the rotary compressor 11 is formed in a two-piece structure of a cylindrical body case portion 20a having a bottom and a cover case portion 20b covering the upper opening of the body case portion 20a. The main body case 20a and the cover case 20b are integrally assembled by sealing the entire circumference by welding.

The motor 21 accommodated in the upper portion of the airtight container 20 is rotatably installed in the stator (stator) 23 and the stator 23 fixed in such a way as to press-fit and shrink-fit the main body case portion 20a. The rotating shaft 25 is fitted to the rotor 24 with the electrons (rotor) 24. The coil ends 27 on both sides of the stator windings 26 provided on the stator 23 are bundled and connected to the power supply terminal 29 through a lead 28 from one coil end 27. . This power supply terminal 29 is attached to the cover case 20b of the airtight container 20.

The rotating shaft 25 supporting the rotor 24 of the electric motor 21 is rotatably supported by the main bearing 31 and the sub bearing 32 of the rotary compressor system 22. The rotary compressor system 22 is attached to the fixed frame 30 fixed to the hermetic container 20, while the cylinder chamber (3) is provided inside by the main bearing 31, the cylinder block 33, and the sub bearing 32. 35 is formed and the piston roller 36 is accommodated in this cylinder chamber 35. As shown in FIG. 2 and FIG. 3, the main bearing 31 is integrally comprised with the boss part 31a which comprises a bearing, and the flange part 31b which comprises the cylinder chamber 35. As shown in FIG. The sub bearing 32 is also composed of a boss portion 32a and a flange portion 32b similarly to the main bearing 31.

The piston roller 36 is mounted on the crank portion 25a of the rotating shaft 25 and is eccentrically rotated in the cylinder chamber 35 by the rotation of the rotating shaft 25. A blade (not shown) pressed by a spring is pressed against the roller face of the piston roller 36, and the cylinder chamber 35 is divided into a suction side and a discharge side.

The refrigerant absorbed into the cylinder chamber 35 through the section pipe 38 by the eccentric rotation of the piston roller 36 is compressed to high temperature and high pressure, and the upper and lower discharge chambers 40 are discharged from the discharge side through the discharge port 39. Discharged to (41).

The refrigerant discharged to the lower discharge chamber 41 is led to the upper discharge chamber 40 through the connection port 42, and is joined therein and sent into the sealed container 20, and the refrigerating cycle from the discharge pipe 43 Discharged into (10).

As the compressor refrigerant compressed by the rotary compressor system 22, 1, 1, 1, 2 tetrafluoroethane (hereinafter referred to as R134a refrigerant), which is an HFC (hydrofluorocarbon) refrigerant that does not destroy the ozone layer, is used. The R134a refrigerant has a refrigerant characteristic close to that of the R22 refrigerant of the HCFC (hydrochlorofluorocarbon) refrigerant.

In the bottom portion of the sealed container 20, a refrigerator oil 44 for lubricating the sliding part of the rotary compressor system 22 is stored. The stored refrigeration oil (44) is raised in the rotary shaft (25) by an oil pump (45) formed at the lower part of the rotary shaft (25) and supplied to the sliding part of the rotary compressor system (22), and the sliding part is lubricated. Let's do it. As the refrigerator oil 44, for example, an ester oil having excellent heat resistance is used.

On the other hand, the fixed frame 30, in which the rotary compressor system 22 is fixed in the hermetic container 20, is inserted into the main body case portion 20a by shrinkage fitting or the like and fixed by welding. As shown in FIG. 2 and FIG. 3, the fixing frame 30 has a cylindrical fixing portion 30a fixed to the inner circumferential wall of the hermetic container 20 and an inner circumferential flange portion 30b forming an attachment portion, and has a cross section L. As shown in FIG. It is formed into a magnetic strip.

The cylinder block 33 constituting the cylinder with the flange portion 31b of the main bearing 31 is connected to the inner circumferential flange portion 30b of the fixing frame 30 by means of fixing means 46 such as a tightening bolt or a screw. As shown in Figs. 4B and 4C, the joints are tightened simultaneously in a plurality of places spaced in the circumferential direction, for example, three places. The flange portion 31b of the main bearing 31 has a plurality of rib portions 47 projecting outward in the radial direction, and the fixing holes for simultaneous tightening allow the fixing means 46 to fit through the rib portions 47. 48 is formed. The fixing hole 48 is larger than the outer diameter of the bolt such as a tightening bolt to fit the tightening bolt. The tightening bolt is fixed by screwing into the fixing hole 49 of the cylinder block 33.

The main bearing 31 and the cylinder block 33 are fixed by co-tightening to the fixed frame 30 fixed to the hermetic container 20 as shown in FIG. The rib portion 47 and the cylinder block 33 of the main bearing 31 may be simultaneously tightened in a sandwich structure from the up-down direction centering on the inner circumferential flange 30b. In this case, the outer circumference of the rib portion 47 or the cylinder block 33 of the main bearing 31 to be engaged with the inner circumferential flange 30b of the fixed frame 30 to couple the main bearing 31 and the cylinder block 33. It is necessary to form the engagement end by recessing a side.

In the cylinder block 33 shown in FIG. 4C, reference numeral 50 denotes a blade groove for accommodating the blade, and reference numeral 51 denotes a plurality of attachment holes for attaching the sub bearing.

Next, the assembly procedure of the rotary compressor 11 is demonstrated.

When assembling the rotary compressor 11, the rotary compressor system 22 is accommodated in the bottomed cylindrical body case 20a. At that time, the fixed frame 30 may be accommodated in the rotary compressor system 22 in a fixed state by simultaneous tightening, or after the assembled rotary compressor system 22 is accommodated, the fixed frame 30 may be sealed. The main bearing 31 and the cylinder block 33 of the rotary compressor system 22 may be simultaneously tightened to the fixed frame 30 fixed to the main body case part 20a of 20).

The fixing frame 30 is attached to the sealed container 20 by inserting the fixed frame 30 into the sealed container 20 by shrinkage fitting or the like, and inserting the fixed frame 30 in a predetermined position and then fixing the portion 30a of the fixed frame 30. ) Is fixed to the inner circumferential wall of the body case portion 20a by welding.

In this way, the fixed frame 30 is fixed in the main body case part 20a of the sealed container 20, and the rotary compressor system 22 is attached to this fixed frame 30. As shown in FIG. At this time, the flange block 31b of the main bearing 31 of the rotary compressor system 22 and the cylinder block 33 constituting the cylinder are stable by direct simultaneous tightening to the inner circumferential flange portion 30b of the fixed frame 30. Is kept fixed.

Since the main bearing 31 has the flange portion 31b directly attached to the inner circumferential flange portion 30b of the fixed frame 30, the rotary compressor 11 can be miniaturized and compacted. The flange width (frame width) of the inner circumferential flange portion 30b of 30 can be sufficiently secured, thereby improving the frame strength and increasing the frame rigidity. In addition, since the vane bearing 31 is directly attached to the fixed frame 30, a path (path) for attachment is shorter than that when the vane bearing 31 is attached to the fixed frame through a cylinder as in the prior art, and the main bearing ( 31) can be maintained.

Since the main bearing 31 and the cylinder block 33 are directly fastened by simultaneously tightening the inner peripheral flange portion 30b of the fixed frame 30, the rotary compressor system 22 is stably maintained while the main bearing 31 is Adhesion accuracy is improved. Since the sub bearing 32 is fixed to the cylinder block 33 which is stably fixed by fixing means such as a tightening screw, the holding of the main bearing 31 and the sub bearing 32 is stabilized, so that both bearings 31 and 32 ), The support accuracy of the rotating shaft 25 rotatably supported by) is improved, and the rotating shaft 25 is supported by both bearings 31 and 32 so that the shaft rotates without shaking.

For this reason, the motor spacing formed between the rotor 24 and the stator 23 of the electric motor 21 supported by the rotating shaft 25 can be balanced.

The stator 23 of the electric motor 21 is inserted and fixed from the opening of the main body case portion 20a by press fitting or shrink fitting.

Then, the rotary compressor system 22 and the motor 21 are accommodated in the main body case 20a, and then the cover case 20b is covered with the entire circumference of the main body case 20a and the cover case 20b. Weld by welding to form a closed structure.

Since the rotary compressor 11 directly attaches the flange portion 31b of the main bearing 31 to the fixed frame 30, even if the rotary compressor 11 is miniaturized and compact, the inner flange portion of the fixed frame 30 ( 30b) the flange width can be secured sufficiently and the frame rigidity can be increased, and the main bearing 31 and the cylinder block 33 are directly attached to the fixed frame having high frame rigidity, so that the main bearing 31 and the cylinder block ( 33) can be stably held, and the rotary compressor system 22 and the electric motor 21 can be stably held to reduce their vibrations, thereby reducing compressor noise and vibration.

In addition, since the main bearing 31 is directly and stably held on the fixed frame 30, the holding of the rotating shaft 25 supported by the main bearing 31 is stabilized. As a result, the motor spacing of the motor 21 is increased. By balancing, the compressor performance can be improved and the reliability of the compressor can be improved.

In this rotary compressor (11), the rotary compressor system (22) is stably fixed to the fixed frame (30) having a high frame rigidity fixed in the sealed container (20), and the motor (21) also has a balanced motor interval. Since the rotary compressor 11 is driven, the noise and vibration of the compressor due to shaking can be reduced.

Therefore, even if H134 refrigerant of R134a is used as the refrigerant of the rotary compressor 11 and synthetic oil of ester oil is used as the lubricating oil, the compressor noise of the rotary compressor 11 is indicated by the broken line b as shown by the solid line (a) of FIG. It is possible to reduce the sound pressure level than the compressor noise of the conventionally used rotary compressor (11).

In this rotary compressor 11, compressor noise can be reduced over approximately the entire frequency range, and a very good low noise compressor is obtained. Further, by increasing the thickness of the main body case portion 20a of the hermetic container 20, the vibration of the compressor can be further reduced, resulting in a low vibration type compressor.

In the rotary compressor 11, an example in which an HFC refrigerant of R134a is used as the compressor refrigerant and an ester oil is used as the lubricating oil is shown.

R134a refrigerant as an HFC refrigerant has a higher noise transfer efficiency than R12 refrigerant, a CFC refrigerant, and when the R134a refrigerant is used in a conventional rotary compressor, the compressor noise of the compressor using the R134a refrigerant is increased as shown in FIG.

However, in the rotary compressor 11, the rotary compressor system 22 which fixes the main bearing 31 and the cylinder block 33 by co-tightening to the fixed frame 30 fixed in the sealed container 20 is maintained. Since the structure is adopted, if other compressor conditions are set equally, even if H134 refrigerant of R134a is employed, the compressor noise can be reduced compared to the conventional rotary compressor using R12 refrigerant.

In addition, the ester-based oil has a higher noise transfer efficiency than the mineral oil used in the conventional rotary compressor, and when the ester-based oil lubricant is used in the conventional rotary compressor, it is higher than the compressor noise using the mineral oil as shown in FIG.

However, in the rotary compressor 11 of the present invention, if the different compressor conditions are the same, the use of ester oil can reduce the compressor noise than the conventional rotary compressor.

In addition, in one embodiment of the present invention, an example in which an HFC refrigerant of R134a is used as the refrigerant for a compressor is shown. Instead of this R134a refrigerant, another HFC refrigerant may be used.

As other HFC refrigerants, as a single refrigerant, difluoromethane (R32), pentafluoroethane (R125), 1,1,2,2-tetrafluoroethane (R134), 1,1,2-tree having a higher discharge pressure than R22 refrigerant Fluoroethane (R143), 1,1,1-trifluoroethane (R143a), 1,1-difluoroethane (R152a), and monofluoroethane (R161).

Among these, R134, R143, and R143a have a boiling point close to that of the conventional CFC12 (R12) refrigerant, and thus are preferable as alternative refrigerants.

The HFC refrigerant may not only be used as a single refrigerant but also a mixture of two or more types of HFC refrigerants. As the HFC mixed refrigerant, a mixed refrigerant of R125 / R143a / R134a, a mixed refrigerant of R32 / R134a, a mixed refrigerant of R32 / R125, and a mixed refrigerant of R32 / R125 / R134a can be considered.

Alternatively, a HCFC (hydrofluorocarbon) refrigerant may be used instead of the HFC refrigerant. The representative of this HCFC refrigerant is HCFC22 (R22) refrigerant.

Moreover, although the example which used ester type oil was shown as lubricating oil used for the rotary compressor 11, you may use the refrigeration oil which has ester type oil like the mixed oil of alkylbenzene type oil and ester type oil.

In addition, in one embodiment of the rotary compressor of the present invention, although the rotary compressor system 22 shows an example in which the rib portion 47 is provided in the flange portion 31b of the main bearing 31, the rib compressor must be provided. As shown in FIG. 8, the main bearing 31 may form the flange part 31b in disk shape. The other configuration is the same as shown in FIG. 3 and FIG. The disc flange 31b is stably and firmly fixed to the main bearing 31 by the fixing frame 30 of the hermetic container 20 by making its outer diameter approximately the same as the inner diameter of the hermetic container 20. The vibration of the rotary compressor system 22 can be reduced, and the compressor noise and vibration can be reduced.

In addition, since the main bearing 31 is stable and firmly fixed, the holding of the rotating shaft 25 supported by the main bearing 31 is stabilized and the motor intervals of the electric motor 21 are balanced to improve the compressor performance and improve reliability. You can.

In the rotary compressor 11 for an air conditioner, the outer case of the sealed container 20 containing the electric motor 21 and the rotary compressor system 22 and the surface of the case of the accumulator 16 are shown in FIG. As shown, the foamed solution is applied, and then the foamed solution is foamed to cover the outer surface of the case with the foam 55 for low noise, or to cover the entire rotary compressor 11 and the accumulator 16 with sound absorbing and soundproofing materials. Existing foams, sound absorbing materials, soundproofing materials and the like can be used even when using the structure of the present invention, the ester oil having a higher noise transfer rate than mineral oil and the HFC refrigerant having a higher noise transfer rate than R12.

10 and 11 show another embodiment of the rotary compressor 11A applied to the refrigeration cycle 10A of the refrigerator.

The refrigeration cycle 10A of the refrigerator basically constitutes a refrigerant circulation circuit by connecting a rotary compressor 11A, a condenser 60, a pressure reducing device 61, and an evaporation device 62 to the refrigerant pipe 63 in order. .

Specifically, as shown in FIG. 11, the refrigeration cycle 10A constitutes a main capacitor constituting the compressor 60 via a rotary compressor 11A, an evaporation pipe 66, a subcondenser 67, and an oil cooler 68. As shown in FIG. (69), after being connected to the clean pipe (70), from the dryer (71) to the evaporator (62) via a decompression device (61), such as a capillary tube (72). This evaporator 62 is subsequently connected to the suction side of the rotary compressor 11A by the section pipe 75 via the accumulator 73 and the silencer 74, and constitutes a refrigerant circulation closed circuit.

11 A of rotary compressors are provided in the machine room 78 formed in the lower back part of the main body casing 77 of a refrigerator as shown in FIG. The compressor 11A uses 1,1,1,2 tetrafluoroethane (hereinafter referred to as R134a refrigerant), which is an HFC (hydrofluorocarbon) refrigerant that does not destroy the ozone layer in the compressor refrigerant.

The rotary compressor 11A using the HFC refrigerant of R134a is configured as shown in FIG.

The rotary compressor 11A is, for example, a horizontally mounted rotary compressor, in which the electric motor 21 and the rotary compressor system 22 driven by the electric motor 21 are accommodated in the sealed container 20.

The sealed container 20A is formed in a three-piece structure consisting of a cylindrical body case portion 20a and cover case portions 20b and 20c provided to cover an opening at both sides of the body case portion 20a. The main body case 20a and the cover case 20b and 20c are integrally assembled in a hermetic structure by welding all around.

As shown in FIG. 13, the main body case part 20a of the airtight container (20 airtight container) is formed by bending a rectangular plate-shaped steel sheet round and welding the joining part 79 to form a joint. Since the main body case 20a is molded by round bending, conventional core drawing is unnecessary, and it can be molded easily and economically. The thickness of the body case portion 20a is formed to be thicker than the thickness of the cover case portions 20b and 20c to increase the case rigidity of the body case portion 20a. The main body case 20a may be formed by cutting the net tube to a predetermined length, or by cutting the ordinary member formed by extrusion molding and drawing molding.

In addition, the electric motor 21 has a stator (stator) 23 pushed into the sealed container 20A and a rotor (rotor) 24 which is rotatably installed on the stator 23, and the rotor 24 is provided. The rotating shaft 250 is fitted in. The stator 23 is pressed into the main body case part 20a of the airtight container 20A, or is pressed in by shrinking fitting, and the stator winding 26 is installed on the stator 23. The coil end 27 is bundled and connected to the power supply terminal 29 through the conductive wire 28. The power supply terminal 29 is attached to the cover case portion 20b of the sealed container 20A.

In addition, the rotating shaft 25 into which the shaft is fitted to the rotor 24 of the electric motor 21 is disposed in the horizontal direction, and is rotated by the main bearing 31 and the sub bearing 32 of the rotary compressor system 22. Possibly supported. The main bearing 31 is directly attached to the fixed frame 30 fixed in the sealed container 20A by co-tightening with the cylinder block 33 as a cylinder, while the main bearing 31 and the cylinder block 33 are attached. And the cylinder chamber 35 is formed inside by the sub bearing 32, and the piston roller 36 is accommodated in this cylinder chamber 35. As shown in FIG.

On the other hand, the fixed frame 30 is formed in an L-shape by integrally molding the cylindrical fixing portion 30a and the inner circumferential flange portion 30b and the flange portion 31b of the main bearing 31 on the inner circumferential flange portion 30b. Since the cylinder block 33 is fastened and fixed at the same time, the main bearing 31 can be directly fastened to the fixed frame 30, and the flange width of the inner circumferential flange portion 30b of the fixed frame 30 is sufficiently secured and fixed. The strength of the frame 30 can be improved and the frame rigidity can be increased. Accordingly, the rotary compressor system 22 is stably and firmly maintained on the fixed frame 30.

The piston roller 36 accommodated in the cylinder chamber 35 is attached to the crank portion 25a of the rotation shaft 25, and is eccentrically rotated in the cylinder chamber 35 with the rotation of the rotation shaft 25. The blade 81 pressed against the piston roller 36 by the spring 80 is pressed against the outside to separate the inside of the cylinder chamber 35 into the suction side and the discharge side. The HFC refrigerant absorbed into the cylinder chamber 35 through the section pipe 75 accompanied by the eccentric rotation of the piston roller 36 is compressed to high temperature and high pressure and is discharged to the discharge chamber 40 via the discharge port 39 from the discharge side. Discharged.

The HFC refrigerant discharged to the discharge chamber 40 is continuously guided into the sealed container 20A and then sent to the compressor 62 via the discharge pipe 43 which is a refrigerant pipe.

In addition, an oil storage unit 33 is formed at the bottom of the case in the sealed container 20A, and the oil storage unit 83 stores lubricating oil (freezing base oil) 44 for lubricating the sliding part of the compressor system 22. have. The stored lubricating oil 44 is supplied to a sliding part such as a bearing part of the rotating shaft 25 by the oil pump 85 via the oil supply pipe 86 to lubricate the sliding part. The oil pump 85 is adapted to supply the lubricating oil stored by the advancing and retracting action of the blade 81 to the oil supply pipe 86 to the sliding part.

The lubricating oil 44 stored in the sealed container 20A is cooled by the oil cooler 68 to maintain the lubricating performance of the lubricating oil 44. The oil cooler 68 is formed by installing a heat exchange pipe 88 for cooling the lubricating oil 44 by using a dead space in the sealed container 20A.

By the way, as lubricating oil 44 which lubricates the compressor sliding part of 11 A of rotary compressors, although mineral oil (naphthenic oil) may be sufficient, the refrigeration oil which has ester oil excellent in heat resistance so that deterioration of lubricating oil and carbonization is used is used.

By using the ester oil as the lubricant 44, the heat resistance is excellent, and the cooling action of the oil cooler 68 is assisted to effectively prevent deterioration and carbonization of the lubricant 44 and improve the lubricating performance of the lubricant 44. The fall can be prevented effectively.

The lubricating oil 44 makes it possible to efficiently lubricate the sliding surface between the bearing surface of the rotary compressor system 22, the piston roller 36, and the blade 81, and improve the compressor performance of the rotary compressor 11A. And the reliability of the compressor can be sufficiently maintained.

Next, the operation of the rotary compressor 11A and the refrigeration cycle 10A will be described.

By energizing the electric motor 21 of the rotary compressor 11A, the electric motor 21 is driven and the rotor 24 is driven to rotate. As the rotor 24 rotates, the rotating shaft 25 rotates integrally, and the piston roller 36 mounted on the crank portion 25a of the rotating shaft 25 eccentrically rotates in the cylinder chamber 35. . As a result, the rotary compressor system 22 is driven.

The HFC refrigerant guided to the suction side of the cylinder chamber 35 through the section pipe 75 by the eccentric rotation of the piston roller 36 is compressed in the cylinder chamber 35 and becomes a high temperature and high pressure to discharge the chamber from the discharge side. It is discharged into the sealed container 20A via 40. The HFC refrigerant discharged into the sealed container 20A is continuously passed through the discharge pipe 43 to the evaporation pipe 66 of the refrigerating cycle 10A, and the drain water stored in the evaporation dish in the evaporation pipe 66. Is evaporating.

The discharge refrigerant of the HFC having evaporated the drain water from the evaporation pipe 66 is continuously guided to the subcondenser 67 to dissipate and cooled, and then guided to the oil cooler 68, where the lubricating oil stored in the sealed container 20A. Cooling (44) prevents this deterioration and maintains lubricating performance. The oil cooler 68 prevents overheating of the inside of the sealed container 20A.

The HFC refrigerant leaving the oil cooler 68 is continuously sent to the condenser and radiated from the main capacitor 69 and the clean pipe 70. The clean pipe 70 is connected in series with the condenser 69, has a condenser function, and prevents condensation on the front surface of the main body caused by the temperature difference between the refrigerator and the room temperature.

After passing through the clean pipe 70, the HFC refrigerant is dried in the dryer 71 and guided to a capillary tube 72, which is a pressure reducing device 61, to decompress and thermally expand. The pressure reducing device 61 may be an expansion valve instead of the capillary tube 72.

The HFC refrigerant depressurized in the capillary tube 72 continues to be guided to the evaporator 62, where the evaporator 62 takes heat from the surroundings and evaporates it. The HFC refrigerant evaporated in the evaporator 62 is gas-liquid separated in the accumulator 73, and the gas component is guided to the section pipe 75. The liquid component of the HFC refrigerant is stored in this accumulator 73.

The HFC refrigerant gas guided to the section pipe 75 is negatively removed by the silencer 74 installed as necessary, and then sucked to the suction side of the rotary compressor 11A, compressed again by the next compressor 11A, and the next refrigeration cycle. Used for 10A.

By the way, as shown in FIG. 12, 11 A of rotary compressors have the cover case part 20b which covers the cylindrical main body case part 20a and both opening parts of this main body case part 20a as shown in FIG. 20c) is formed in a three-piece structure, and the main body case portion 20a is formed by round bending a rectangular plate steel sheet, so that the thickness (plate thickness) of the main body case portion 20a is selected by selecting a plate steel sheet. It can be changed easily. Since the main body case 20a is rounded and bent, the molding is easy and economical, and by this molding, it can be easily made into a cylindrical structure. Therefore, the main body case part 20a can easily ensure the required design thickness.

The thickness of the main body case 20a is preferably about 1.25 to 1.4 times the thickness of the cover case 20b or 20c. When the thickness (case plate thickness) of the main body case part 20a is made thick, case rigidity rises and the noise from the electric motor 21 and the rotary compressor system 22 can be reduced, and the rotary compressor 11A and Vibration of the device itself, such as a refrigerator, can be reduced, and compressor noise can be reduced over the entire frequency band to a practical noise level.

In addition, the thickness of the main body case portion 20a is increased so that the rigidity of the case can be improved, and the fixed frame 30 fixed to the sealed container 20A can sufficiently secure the flange width, thereby increasing the frame rigidity and increasing the fixed frame ( Since the main bearing 31 and the cylinder block 33 are directly co-tightened and fixed to 30), the rotary compressor 22 and the motor 21 can be stably and accurately maintained and the compressor vibration due to shaking can be reduced. On the other hand, since the transmission sound from the electric motor 21 and the rotary compressor system 22 which are the vibration generating sources can be shielded more than before, further noise can be reduced.

It is not necessary to have a structure as thick as cover case members 20b and 20c fixed to the main body case 20a on both sides by a full circumferential welding. This is because most of the noise from the electric motor 21 and the compressor system 22 is easily emitted from the main body case 20a, and the effective noise prevention measures can be implemented by making the main body case 20a thick.

On the contrary, even if the cover case members 20b and 20c do not have a thick structure, one cover case portion 20c constitutes a refrigerant pipe and a support device 91 such as a suction pipe 75 and a cooling pipe 90. Support pins (stad pins) 92 as case support members are attached to maintain sufficient case rigidity, while refrigerant pipes such as discharge pipes 43 and support devices 95 are also provided on the other cover case 20b. The support metal member 96 as the case member constituting the s is attached by welding to maintain sufficient rigidity.

The sealed container 20A of the rotary compressor 11A is dust-proof by the supporting devices 91 and 95 in both sides of the machine chamber 28 formed at the rear lower part of the refrigerator as shown in FIGS. 13 to 15. (Iii) Three points are supported by the structure.

One support device 91 is provided with a support leg 98 on the base 97 of the machine room 28, and puts the dustproof body 99 on the upper part of the support leg 98, and the dustproof body 99. It is a one-point support structure in which the support pins 92 are supported.

The other support device 95 has a two-point support structure, and a dustproof body 102 is placed on a support flange 101 which is a pair of support legs 100 on a base 97. The support metal member 96 is installed thereon so that the sealed container 20A is supported on the base 97. The axis of the rotating shaft 25 is contained in the plane formed by the three support points of the both support devices 91 and 95.

Moreover, the joint part 80 which is the joining part 80 of the main body case part 20a of the airtight container 20 is set in the case bottom part as shown in FIG. Since the welded portion 80 of the joint is formed on the bottom of the main body case 20a, the external portion of the rotary compressor 11A can be improved because the welded portion 80 is not exposed to the outside. In addition, since the blade can be fixed or adhered to a wide place other than the joint portion 80, the blade attachment position can be used widely, and attachment and adhesion are facilitated, thereby improving attachment freedom.

Further, the stator 23 of the electric motor 21 accommodated in the sealed container 20A is arranged as shown in FIG. 16, and the outer diameter cutout 105 of the stator core of the stator 23 has the main body case 20a. By fitting to the joint portion 80 of the c), even if the internal diameter precision of the body case portion 20a formed by the round bending process is not good, the stator core is pressed into the body case portion 20a or contracted to lubricate the fit. Since the stator core does not come into contact with the joint portion 80 and be damaged when it is pushed in or shrink-fitted, it is possible to prevent the breakage of the joint portion 80 of the body case portion 20a and ensure reliability. Can improve.

On the other hand, in this rotary compressor, the axial length of the stator 23, which is pressed in the sealed case 20A or fixed by shrinkage fitting or the like, is set to be equal to or larger than the radial dimension of the stator core. It can reduce the noise of low frequency band.

The mechanism of generating electromagnetic noise of the motor 21 is that the stator core and the rotor core are attracted to each other by the fundamental and harmonic fluxes in the air layer between the stator 23 and the rotor 24, and the suction force is periodically generated by the replacement magnetic field. This is due to the variation of the suction force, and the polygonal strain vibration occurs at the stator core and the electromagnetic noise is generated.

Electromagnetic noise is caused by low frequency vibration of about 300Hz to 500Hz. To reduce this electromagnetic noise, (1) reduce the attraction force of the air layer, (2) make the polygonal deformation as circular as possible, and (3) the stator. It is required to reduce the vibration of the iron core.

Of these, (1) and (2) are applicable by appropriately winding the windings (main winding and auxiliary winding) of the motor 21 and making the air layer uniform, and at the same time, at the expense of motor performance such as motor efficiency and torque. . In order to maintain motor performance, (1) and (2) need to be compromised to some extent.

In the rotary compressor 11A, the stator iron core is secured by minimizing the stacking length of the stator core (axial length of the stator 23) L by focusing on the contents of (3) which reduces the vibration of the faulty magnetic core. Vibration can be suppressed.

As shown in FIG. 12, this rotary compressor 11A has a stacking thickness (axial length of the high and low pole 23) L of the stator core constituting the stator 23 of the electric motor 21 outside the stator core. Diameter The lamination thickness (L) at the ratio of D) D / 2) or more suppresses the vibration of the stator core.

FIG. 17 shows the frequency analysis result of the compressor noise comparing the rotary compressor of the solid line a according to the present invention with the rotary compressor represented by the dashed line b of the conventional type.

In FIG. 17, the hatched portion A is the compressor noise reduction area for the electric motor 21, and the other hatched portion B is the compressor noise reduction area for the compressor system 22. In FIG. In this rotary compressor 11, it was found that electromagnetic noise of about 300 Hz to 500 Hz due to the electric motor 21 and compressor noise of 2 KHz or higher due to the compressor system 22 can be reduced.

In this rotary compressor 11A, compressor noise can be reduced over approximately the entire frequency range, resulting in a very good low noise compressor. In addition, by increasing the thickness of the main body case portion 20a of the sealed container 20, the vibration of the compressor can be reduced, resulting in a low vibration type compressor.

External diameter of the stator 23 of the electric motor 21 ( The following experimental data were obtained for the relationship between D) and the lamination thickness (L) of the stator core and the noise (peak frequency of 300 Hz to 500 Hz) in the low frequency region 300 Hz to 500 Hz.

From Table 1, the noise of the motor 21 is determined by It can be seen that as D) increases, it decreases as the stack thickness (axial length of the stator) L of the stator core increases. Therefore, the axial length L of the stator 23 is equal to or greater than a predetermined length, for example, the semi-diameter of the stator core ( D / 2) or more can reduce the low frequency noise caused by the electric motor 21.

In the rotary compressor 11A, an example in which an HFC refrigerant refrigerant of R134a is used as the lubricant for the compressor and an ester oil is used as the lubricating oil is shown.

R134a refrigerant as HFC refrigerant has higher noise transfer efficiency than C12 refrigerant R12 refrigerant, and when R134a refrigerant is used in a conventional two-piece rotary compressor, the compressor noise of the compressor using R134a refrigerant is increased.

However, in the rotary compressor 11A, the three-piece structure is used to make the thickness of the main body case portion 20a of the hermetic container 20 larger than that of the cover case portions 20b and 20c, and fix the hermetic container 20. The motor 30 of the rotary compressor system 22 is sealed by adopting a sealed container structure in which the main bearing 31 and the cylinder block 33 of the rotary compressor system 22 are simultaneously tightened and fixed to the frame 30. If it can be stably maintained in (20) and other conditions are set equally, even if the HFC refrigerant of R134a is adopted, the compressor noise can be reduced than the conventional rotary compressor employing the R12 refrigerant.

In addition, the ester-based oil has a higher noise transfer efficiency than the mineral oil used in the conventional rotary compressor, and when the lubricating oil of the ester-based oil is used in the conventional rotary compressor, it is higher than the compressor noise using the mineral oil.

However, in the rotary compressor 11A of the present invention, even when the ester oil is used, the compressor noise can be reduced compared to the conventional rotary compressor.

In addition, the present invention can adopt the same structure and material as those using CFC refrigerant and mineral oil without improving the sound insulation structure of the refrigerator machine room, so that it does not affect the heat radiating mechanism of the machine room and is effective for preventing overheating. to be.

In the rotary compressor 11A, an example in which R134a is used as the refrigerant for the compressor and ester-based oil is used as the lubricating oil is shown. However, the refrigerant for the compressor is not limited to the R134a refrigerant, but other HFC single refrigerant and HFC mixed refrigerant may be used. The lubricating oil may be a refrigeration oil containing an ester oil, such as a synthetic oil mainly composed of an ester oil and an alkylbenzene oil, a mixed oil mainly composed of an ester oil and an alkylbenzene oil, in addition to the ester oil.

In addition, although the rotary compressor described in the embodiment of the present invention has been described with one cylinder, the rotary compressor can also be applied to a rotary compressor having a plurality of cylinders.

Moreover, although the example which applied this rotary compressor to the refrigerator demonstrated the compressor provided with the oil cooler, it is applicable also to the rotary compressor of the type which does not have an owl cooler.

In addition, the embodiment of the present invention shows an example in which a rotary compressor is applied to an air conditioner and a refrigerator, but may be applied to a refrigeration apparatus such as a freezing showcase and a large refrigeration plant. The rotary compressor can also be applied to a refrigeration cycle of a refrigerating device mounted in a refrigerator. Like a refrigerator, a refrigeration unit is composed of a basic refrigeration cycle by a rotary compressor, a condenser, a decompression device, and an evaporator.

In addition, in the refrigerating device, it is possible to sufficiently reduce noise without improving the sound insulation structure of the refrigerating machine machine room like the refrigerator, and is effective for preventing overheating because it does not affect the heat dissipation structure of the machine room.

As described above, in the rotary compressor according to the present invention, a fixed frame is provided inside the sealed container, and the fixed frame is provided in a plurality of places spaced apart from each other in the circumferential direction by the flange portion of the main bearing of the rotary compressor system. Since it is fixed by simultaneous tightening, the main bearing and the cylinder can be fixed by simultaneous tightening directly to the fixed frame to improve work efficiency, while the fixed frame can secure a sufficient frame width, thereby improving the frame strength. Can increase. Since the main bearing and the cylinder can be stably fixed to the fixed frame having high frame rigidity, vibration of the rotary compressor system and the motor can be reduced, and compressor noise and vibration can be reduced.

In addition, the rotary compressor can directly fix the flange portion of the main bearing to the fixed frame, so that the rotary compressor can be miniaturized and compacted, and the frame width of the fixed frame can be sufficiently secured even if the rotary compressor is reduced in size and compact. Since the strength can be increased, the frame stiffness can be sufficiently maintained to stably maintain the main bearing, and thus the rotary compressor system, and balance the motor distance between the stator and the rotor of the motor. Therefore, the compressor performance can be improved and the reliability of the rotary compressor can be improved.

In the rotary compressor of the present invention, the flange portion of the main bearing has a plurality of rib portions projecting radially outward, and the ribs are formed by drilling fixing holes for simultaneous tightening to remove the wasteful thickness of the main bearing, thereby saving material. In addition, the main bearing and the cylinder can be fixed directly to the fixed frame to secure the frame width to increase the frame strength, and to reduce the compressor noise and vibration by reducing the vibration of the rotary compressor. have.

In addition, since the main bearing is directly and stably fixed to the fixed frame of the hermetically sealed container, the maintenance of the rotating shaft supported by the main bearing is stable, and the motor interval of the motor can be balanced to improve the compressor performance and improve reliability.

In the rotary compressor of the present invention, if the outer diameter of the flange portion of the main bearing is formed to be approximately the same as the inner diameter of the sealed container, and the main bearing is stably and firmly fixed to the fixed frame of the sealed container, vibration of the rotary compressor system is reduced. The noise and vibration of the compressor can be reduced.

In addition, when the main bearing is stably fixed, the maintenance of the rotating shaft supported by the main bearing is stabilized and the motor interval of the motor is balanced to improve the compressor performance and improve reliability.

In the rotary compressor of the present invention, when the refrigerator oil including the lubricating oil and the ester oil lubricates the sliding part of the rotary compressor system, the heat resistance is excellent. On the other hand, the ester oil and the like are compared with the mineral oils conventionally used. High noise transfer rate and raises the noise level in the entire frequency band, but keeps the rotary compressor system in a sealed container stably and balances the motor spacing of the motor. Properties are obtained.

In the rotary compressor of the present invention, HFC (hydrofluorocarbon) refrigerant such as R134a is used as the refrigerant for the compressor. For example, HFC refrigerants have a higher noise transfer rate than conventional CFC (chlorofluorocarbon) refrigerants. However, in the rotary compressors of the present invention, HFC refrigerants are stably held in a rotary compressor system in an airtight container and the motor intervals of the motor are balanced. Even if it uses etc., the silent characteristic which is practically no problem is obtained.

In addition, the rotary compressor of the present invention does not increase the noise level even when using a refrigeration base oil and an HFC refrigerant (HFC alone or HFC mixed refrigerant) containing a ester-based oil having a higher noise transfer rate than conventional mineral oils and CFC refrigerants. Silent characteristics without practical problems are obtained.

Refrigerators and freezers equipped with a rotary compressor according to the present invention operate stably because the noise and vibration of the compressor are reduced.

Claims (10)

In a rotary compressor accommodating an electric motor and a rotary compressor system driven by the motor in a sealed container, a fixed frame is provided inside the sealed container, and the flange portion of the main bearing of the rotary compressor system is provided on the fixed frame. A rotary compressor characterized in that the cylinder is fixed by simultaneous tightening in multiple places spaced in the circumferential direction. 2. The rotary compressor according to claim 1, wherein the flange portion of the main bearing has a plurality of rib portions projecting in the radial direction, and is provided by drilling a fixing hole for simultaneous tightening in the rib portion. The rotary compressor of claim 1, wherein the main bearing has an outer diameter of the flange portion equal to an inner diameter of the sealed container. The rotary compressor according to any one of claims 1 to 3, wherein refrigeration oil containing ester oil is used as lubricating oil for lubricating sliding parts of the rotary compressor system. The rotary compressor according to any one of claims 1 to 3, wherein an HFC medium is used for the compressor refrigerant compressed by the rotary compressor system. The refrigerant oil according to any one of claims 1 to 3, wherein the refrigerant oil containing ester oil is used as lubricating oil for lubricating the sliding part of the rotary compressor system, and HFC refrigerant is used as the compressor refrigerant compressed in the compressor system. Rotary compressor characterized by. A refrigeration apparatus having a refrigeration cycle configured by connecting a compressor, a condenser, a decompression device, and an evaporator, wherein the compressor of the refrigeration cycle includes an electric motor and a rotary compressor driven by the electric motor in a sealed case. A fixed frame is installed inside the sealed case, and the fixed frame uses a rotary compressor fixed by simultaneous tightening at a plurality of places spaced apart in the circumferential direction by the flange of the main bearing of the rotary compressor system. Refrigeration apparatus. A refrigerator having a refrigeration cycle in which a compressor, a condenser, a decompression device, and an evaporator, which accommodate an electric motor and a compressor system driven by the motor, are sequentially connected in a sealed container, wherein the compressor has a fixed frame inside the sealed container. And a rotary compressor fixed to the fixed frame by simultaneous tightening the flange part of the main bearing of the rotary compressor system and plural spaces spaced apart in the circumferential direction, and lubricating oil for sliding the sliding part of the rotary compressor system. Refrigerator characterized by using a refrigeration oil containing an ester-based oil. A refrigerator having a refrigeration cycle in which a compressor, a condenser, a decompression device, and an evaporator, which accommodate an electric motor and a compressor system driven by the motor, are sequentially connected in a sealed container, wherein the compressor has a fixed frame inside the sealed container. It is a rotary compressor fixed to the fixed frame by simultaneous tightening the flange part and the cylinder of the main bearing of the rotary compressor system at plural places spaced in the circumferential direction, and is a compressor refrigerant compressed by the rotary compressor. Refrigerator, characterized in that using. A refrigerator having a refrigeration cycle in which a compressor, a condenser, a decompression device, and an evaporator, which accommodate an electric motor and a compressor system driven by the motor, are sequentially connected in a sealed container, wherein the compressor has a fixed frame inside the sealed container. And a rotary compressor fixed to the fixed frame by simultaneous tightening the flange part of the main bearing of the rotary compressor system and plural spaces spaced apart in the circumferential direction, and lubricating oil for sliding the sliding part of the rotary compressor system. A refrigerator characterized by using a refrigerator oil containing an ester oil.