Rotary compressor and refrigeration system

Abstract

This disclosure provides a rotary compressor that suppresses vibrations in the compression mechanism. [Solution] A rotary compressor comprising: a shaft extending in a first direction; a motor for driving the shaft; a first bearing for supporting the shaft; a cylinder forming a cylinder chamber inside; a roller fixed to the shaft and rotating eccentrically in the cylinder chamber; a casing housing the shaft, motor, first bearing, cylinder and roller; a fixing member housed in the casing and fixing the first bearing to the casing; and an intake pipe inserted through the casing and supplying refrigerant to the cylinder chamber, wherein the motor, first bearing and cylinder are arranged sequentially along the first direction, and the fixing member has a first part positioned between the outer circumferential surface of the first bearing and the casing and welded to the casing, and a second part positioned on the cylinder side of the first bearing and fixed to the first bearing, the first part of the fixing member having a notch at the position of the intake pipe.

Description

Technical Field

[0001] The present disclosure relates to a rotary compressor and a refrigeration device. The rotary compressor is a compressor that compresses the gas in the compression chamber formed in the cylinder by eccentrically rotating a roller in the cylinder. The rotary compressor generally has a vane for partitioning the compression chamber. The rotary compressor includes a so-called rolling piston type in which a vane separate from the roller contacts the roller while the roller rotates eccentrically, a so-called swing type in which a vane integrally formed with the roller swings as the roller rotates eccentrically, a so-called hinge vane type in which the tip of the vane is rotatably fitted in a recess on the outer peripheral surface of the roller while the roller rotates eccentrically, and the like.

Background Art

[0002] Patent Document 1 discloses a hermetic compressor in which a compression element for compressing a working fluid is housed in a casing. Patent Document 1 discloses that the compression element is made of steel having a carbon content of 2.0% or less and is fixed by a welded portion welded to the casing. Patent Document 1 discloses that the welded portion is constituted by a separate fixing member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a rotary compressor, it is required to suppress the vibration of the compression mechanism portion.

[0005] The present disclosure provides a rotary compressor that suppresses the vibration of the compression mechanism portion.

Means for Solving the Problems

[0006] The rotary compressor from the first perspective is, A shaft extending in the first direction, A motor that drives the aforementioned shaft, The first bearing supporting the shaft, A cylinder that forms a cylinder chamber inside, A roller fixed to the shaft and rotating eccentrically within the cylinder chamber, A casing that houses the shaft, the motor, the first bearing, the cylinder, and the roller, A fixing member housed in the casing and used to fix the first bearing to the casing, A suction pipe is inserted into the casing and supplies refrigerant to the cylinder chamber, Equipped with, The motor, the first bearing, and the cylinder are arranged in order along the first direction. The aforementioned fixing member is A first part is positioned between the outer circumferential surface of the first bearing and the casing and is welded to the casing, A second part is positioned on the cylinder side of the first bearing and fixed to the first bearing, It has, The first part of the fixing member has a notch at the position of the suction pipe. It is a rotary compressor.

[0007] According to the rotary compressor of the first perspective, by providing a notch at the position of the suction pipe, vibrations of the compression mechanism can be suppressed while preventing mechanical interference between the fixed member and the suction pipe.

[0008] The rotary compressor from the second perspective is, The suction pipe is connected to the first bearing or the cylinder, This is a rotary compressor from the first perspective.

[0009] According to the rotary compressor from the second perspective, by providing a notch at the position of the suction pipe connected to the first bearing or cylinder, vibrations of the compression mechanism can be suppressed while preventing mechanical interference between the fixed member and the suction pipe.

[0010] The rotary compressor from the third perspective is, A shaft extending in the first direction, A motor that drives the aforementioned shaft, The first bearing supporting the shaft, A cylinder that forms a cylinder chamber inside, A roller fixed to the shaft and rotating eccentrically within the cylinder chamber, A second bearing supporting the aforementioned shaft, A casing that houses the shaft, the motor, the first bearing, the cylinder, the roller, and the second bearing, A fixing member housed in the casing and used to fix the first bearing to the casing, A suction pipe is inserted into the casing, connected to the second bearing, and supplies refrigerant. Equipped with, The motor, the first bearing, the cylinder, and the second bearing are arranged in order along the first direction. The aforementioned fixing member is A first part is positioned between the outer circumferential surface of the first bearing and the casing and is welded to the casing, A second part is positioned on the cylinder side of the first bearing and fixed to the first bearing, Having, It is a rotary compressor.

[0011] According to the rotary compressor of the third perspective, the fixing member is positioned on the cylinder side of the first bearing and has a second part that is fixed to the first bearing, thereby lowering the position in which the compression mechanism is fixed and suppressing vibration of the compression mechanism.

[0012] The rotary compressor from the fourth perspective is, The fixing member is fixed to the first bearing by a bolt. In the front view in the first direction, the angle formed by the straight line connecting the axial center of the shaft and the bolt and the straight line connecting the axial center and the suction pipe is 20 degrees or more. It is a rotary compressor from any of the first to third viewpoints.

[0013] According to the rotary compressor from the fourth viewpoint, by shifting the positions of the bolt and the suction pipe, it is possible to prevent interference between the bolt and the suction pipe and increase the holding force at a portion close to the antinode of vibration, so that vibration can be suppressed.

[0014] The rotary compressor from the fifth viewpoint The fixing member is fixed to the first bearing by three or more bolts. It is a rotary compressor from any of the first to third viewpoints.

[0015] According to the rotary compressor from the fifth viewpoint, by firmly fixing the fixing member with three or more bolts, the vibration of the compression mechanism portion can be suppressed.

[0016] The refrigeration device from the first viewpoint It is a refrigeration device including the compressor according to any one of claims 1 to 3.

[0017] According to the refrigeration device from the first viewpoint, the vibration of the compression mechanism portion in the compressor included in the refrigerator can be suppressed.

Brief Description of Drawings

[0018] [Figure 1] FIG. 1 is a perspective view of a rotary compressor according to the first embodiment. [Figure 2] FIG. 2 is a cross-sectional view of a rotary compressor according to the first embodiment. [Figure 3] FIG. 3 is a perspective view of a fixing member in a rotary compressor according to the first embodiment. [Figure 4] FIG. 4 is a diagram for explaining the fixing of the fixing member in a rotary compressor according to the first embodiment to the upper bearing. [Figure 5] Figure 5 is a cross-sectional view of a rotary compressor according to the second embodiment. [Figure 6] Figure 6 is a perspective view of the fixed member in the rotary compressor according to the second embodiment. [Figure 7] Figure 7 is a perspective view of the fixed member in the rotary compressor according to the second embodiment. [Figure 8] Figure 8 is a cross-sectional view of a rotary compressor according to the third embodiment. [Figure 9] Figure 9 is a perspective view of the fixed member in the rotary compressor according to the third embodiment. [Figure 10] Figure 10 is a perspective view of the fixed member in a rotary compressor according to the third embodiment. [Figure 11] Figure 11 is a schematic diagram of a refrigeration system equipped with a rotary compressor according to this embodiment. [Modes for carrying out the invention]

[0019] <First Embodiment> A specific example of the rotary compressor of the first embodiment will be described below with reference to the drawings. However, this disclosure is not limited to these examples, and all modifications are intended to be included in the meaning and scope equivalent to the claims, as indicated by the claims.

[0020] In addition, regarding the descriptions and drawings of each embodiment, components having substantially the same or corresponding functional configurations may be denoted by the same reference numerals, thereby omitting redundant explanations. Furthermore, for ease of understanding, the scale of each part in the drawings may differ from the actual scale.

[0021] A degree of deviation is permissible in directions such as parallel, right angles, orthogonal, horizontal, vertical, up and down, left and right, and front and back, as long as it does not impair the effects of the embodiment. The shape of the corners is not limited to right angles and may be rounded. Parallel, right angles, orthogonal, horizontal, and vertical may include approximately parallel, approximately right angles, approximately orthogonal, approximately horizontal, and approximately vertical, respectively.

[0022] For example, "approximately parallel" means that two lines or two planes can be treated as parallel to each other within a manufacturingly acceptable range, even if they are not perfectly parallel. Similarly, "approximately right angle," "approximately perpendicular," "approximately horizontal," and "approximately vertical" are intended to apply as long as the relative positions of the two lines or two planes are within a manufacturingly acceptable range.

[0023] A rotary compressor according to the first embodiment will now be described. The rotary compressor according to the first embodiment comprises a shaft extending in a first direction, a motor that drives the shaft, a first bearing that supports the shaft, a cylinder that forms a cylinder chamber inside, and a roller fixed to the shaft that rotates eccentrically in the cylinder chamber. The rotary compressor according to the first embodiment also comprises a second bearing that supports the shaft, a casing that houses the shaft, motor, first bearing, cylinder, roller, and second bearing, and a fixing member housed in the casing that fixes the first bearing to the casing. Furthermore, the rotary compressor according to the first embodiment includes a suction pipe that is inserted through the casing, connected to the second bearing, and supplies refrigerant. In the rotary compressor according to the first embodiment, the motor, first bearing, cylinder, and second bearing are arranged in order along the first direction. The fixing member in the rotary compressor according to the first embodiment has a first part that is arranged between the outer circumferential surface of the first bearing and the casing and welded to the casing, and a second part that is arranged on the cylinder side of the first bearing and fixed to the first bearing.

[0024] Figure 1 is a perspective view of a rotary compressor 1, which is an example of a rotary compressor according to the first embodiment. Figure 2 is a cross-sectional view of a rotary compressor 1, which is an example of a rotary compressor according to the first embodiment.

[0025] For ease of explanation, drawings may sometimes include a virtual three-dimensional coordinate system (XYZ Cartesian coordinate system) consisting of mutually orthogonal X, Y, and Z axes (XYZ axes). For example, when a coordinate axis perpendicular to the plane of the drawing is shown with a black circle inside, it indicates that the coordinate axis is pointing towards the viewer relative to the plane of the drawing. Conversely, when a coordinate axis is shown with an X inside, it indicates that the coordinate axis is pointing away from the plane of the drawing.

[0026] However, this coordinate system is defined for illustrative purposes only and is not limited to the orientation of the rotary compressor, etc., according to this embodiment.

[0027] In the following diagram, the shaft 81 of the rotary compressor 1 extends in the direction along the Z-axis, and the rollers 61 and 62 of the rotary compressor 1 rotate in a plane parallel to the XY plane, which includes the X and Y axes. The direction along the Z-axis (Z-axis direction) is the vertical direction.

[0028] A view of an object along the Z-axis, looking from the +Z side in the opposite direction of the Z-axis, is called a plan view. A view of an object along the Z-axis, looking from the +Z side in the opposite direction of the Z-axis, is called a bottom view. A view of an object along the Z-axis, looking from the -Z side in the direction of the Z-axis, is called a bottom view.

[0029] The rotary compressor 1 compresses a refrigerant. The refrigerant used in the rotary compressor 1 is, for example, carbon dioxide. However, the refrigerant is not limited to carbon dioxide; for example, fluorocarbon-based, hydrofluoroolefin-based, or hydrocarbon-based refrigerants may also be used. The rotary compressor 1 comprises a compressor body 10 and an accumulator 20.

[0030] [Compressor body 10] The compressor body 10 comprises a casing 11, an intake pipe 12, an exhaust pipe 13, and power terminals 15. The casing 11 also includes a plate 14 for mounting the compressor body 10.

[0031] The casing 11 is a cylindrical sealed container. The casing 11 comprises a body portion 11a, an upper end plate 11b, and a lower end plate 11c. The end of the body portion 11a is closed by the upper end plate 11b and the lower end plate 11c, respectively. The casing 11 is sealed by the body portion 11a being closed by the pair of upper end plates 11b and lower end plates 11c.

[0032] The body portion 11a has a cylindrical shape. The intake pipe 12 is attached to the lower part of the body portion 11a of the casing 11. The upper end plate 11b and the lower end plate 11c each have a dish shape. The exhaust pipe 13 is attached to the upper part of the body portion 11a of the casing 11.

[0033] The compressor body 10 comprises a compression mechanism 70 and a motor 80 inside the casing 11. The motor 80 rotates a shaft 81. The compression mechanism 70 compresses the refrigerant supplied from the suction pipe 12. The refrigerant compressed in the compression mechanism 70 is discharged to the outside of the rotary compressor 1 through the exhaust pipe 13. The compression mechanism 70 is fixed to the casing 11 by a fixing member 71.

[0034] Motor 80 rotates shaft 81. Shaft 81 is connected to rollers 61 and 62, respectively. In the compression mechanism 70, shaft 81, rotated by motor 80, rotates rollers 61 and 62, respectively. Rollers 61 and 62 rotate eccentrically as shaft 81 rotates. As rollers 61 and 62 rotate, the refrigerant is compressed in the compression mechanism 70. The compression chamber is partitioned by vanes as rollers 61 and 62 rotate.

[0035] The shaft 81 has a passage through which lubricating oil flows. The shaft 81 has a communication hole that penetrates from the internal passage to the outside of the shaft 81 in order to supply lubricating oil to the lower bearing 31, cylinder 41, cylinder 42, and upper bearing 32, respectively.

[0036] The shaft 81 has a main shaft portion 82, an eccentric portion 83, an intermediate connecting portion 84, an eccentric portion 86, and a sub-shaft portion 87. In the shaft 81, the main shaft portion 82, the eccentric portion 83, the intermediate connecting portion 84, the eccentric portion 86, and the sub-shaft portion 87 are formed integrally.

[0037] The main shaft portion 82 has a cylindrical or cylindrical shape. The upper end of the main shaft portion 82 is connected to the rotor of the motor 80. The lower end of the main shaft portion 82 is rotatably supported by the upper bearing 32. The lower end of the main shaft portion 82 forms a journal.

[0038] The eccentric portion 83 is a cylindrical part with a larger diameter than the main shaft portion 82. The central axis of the eccentric portion 83 is eccentric to the central axis of the main shaft portion 82. A roller 62 is attached to the eccentric portion 83.

[0039] The intermediate connecting section 84 connects the eccentric section 83 and the eccentric section 86.

[0040] The eccentric portion 86 is a cylindrical part with a larger diameter than the main shaft portion 82. The central axis of the eccentric portion 86 is eccentric from the central axis of the main shaft portion 82. The eccentric portion 86 is eccentric with respect to the central axis of the main shaft portion 82 on the opposite side from the eccentric portion 83. A roller 61 is attached to the eccentric portion 86. The lower surface of the eccentric portion 86 slides against the upper surface of the lower bearing 31.

[0041] The sub-shaft portion 87 has a cylindrical or cylindrical shape. The sub-shaft portion 87 is rotatably supported by the lower bearing 31. The sub-shaft portion 87 constitutes a journal.

[0042] The compression mechanism 70 comprises a lower bearing 31, a cylinder 41, a middle plate 33, a cylinder 42, and an upper bearing 32. The lower bearing 31, cylinder 41, middle plate 33, cylinder 42, and upper bearing 32 of the compression mechanism 70 are stacked from bottom to top.

[0043] The upper bearing 32 is positioned above the cylinders 41 and 42, respectively. The lower bearing 31 is positioned below the cylinders 41 and 42, respectively. The shaft 81 passes through the lower bearing 31, cylinder 41, middle plate 33, cylinder 42, and upper bearing 32. The shaft 81 has communication holes that penetrate from an internal flow path to the outside of the shaft 81 in order to supply lubricating oil to the lower bearing 31, cylinder 41, cylinder 42, and upper bearing 32, respectively.

[0044] The compression mechanism 70 includes a roller 61 that rotates eccentrically by a shaft 81 in a cylinder chamber formed inside the cylinder 41. The lower surface of the roller 61 slides against the upper surface of the lower bearing 31. The upper surface of the roller 61 also slides against the lower surface of the middle plate 33.

[0045] Furthermore, the compression mechanism 70 includes a roller 62 that rotates eccentrically by a shaft 81 in a cylinder chamber formed inside the cylinder 42. The lower surface of the roller 62 slides against the upper surface of the middle plate 33. The upper surface of the roller 62 also slides against the lower surface of the upper bearing 32.

[0046] The compression mechanism 70 is fixed to the casing 11 by a fixing member 71. Figure 3 is a perspective view of the fixing member 71 in a rotary compressor 1, which is an example of a rotary compressor according to the first embodiment.

[0047] The fixing member 71 has a cylindrical first part 71a and an annular second part 71b. The first part 71a extends from the second part 71b in the -Z direction along the Z-axis. The second part 71b has an opening 71h at the center of a disk parallel to the XY plane. Having an opening 71h at the center of the disk gives the second part 71b an annular shape. A fillet is formed between the first part 71a and the second part 71b, for example. The second part 71b is positioned on the cylinder 42 side of the upper bearing 32. The second part 71b is fixed to the upper bearing 32.

[0048] Part 1 71a is welded to the casing when the compression mechanism 70 is fixed to the casing 11 by the fixing member 71.

[0049] The second part 71b has a plurality of through holes 71h1 through which bolts pass. The second part 71b also has a plurality of elongated holes 71h2 between the through holes 71h1. The second part 71b is fastened to the upper bearing 32 by bolts. The elongated holes 71h2 serve as passages for lubricating oil, for example, to flow from the top to the bottom of the casing 11.

[0050] When the compression mechanism 70 is assembled, the upper part of the cylinder 42 is positioned in the opening 71h in the second part 71b.

[0051] The compression mechanism 70 is connected to the upper bearing 32 by a fixed member 71. Specifically, the fixed member 71 is connected to the upper bearing 32. The fixed member 71 is then welded to the casing 11. By welding the casing 11 and the fixed member 71, and fixing the upper bearing 32 to the fixed member 71, the upper bearing 32 is indirectly fixed to the casing 11.

[0052] The fixing of the fixing member to the upper bearing in the rotary compressor according to the first embodiment will be described. Figure 4 is a diagram illustrating the fixing of the fixing member 71 to the upper bearing 32 in a rotary compressor 1, which is an example of a rotary compressor according to the first embodiment.

[0053] The upper bearing 32 has a plurality of screw holes 32h that open into the lower surface 32S1. The plurality of screw holes 32h are provided corresponding to the through holes 71h1 in the fixing member 71. A bolt 72 is screwed into each of the plurality of screw holes 32h.

[0054] The bolt 72 passes through the through hole 71h1 in the fixing member 71 and is screwed into the threaded hole 32h. The fixing member 71 is fastened to the upper bearing 32 by the bolt 72. It is preferable that the fixing member 71 be fastened with three or more bolts 72. By fastening the fixing member 71 with three or more bolts 72, the fixing member 71 is firmly fixed to the upper bearing 32, thereby suppressing vibration of the compression mechanism 70. It is preferable that the angle between the bolt 72 and the intake pipe 12 with respect to the central axis of the shaft 81 be 20 degrees or more. By offsetting the positions of the bolt 72 and the intake pipe 12, it is possible to increase the holding force in the part close to the antinode of vibration while preventing interference between the bolt 72 and the intake pipe 12, thereby suppressing vibration. In the upper bearing 32, the threaded hole 32h is provided on the lower surface 32S1, so the fixing member 71 is attached to the lower side of the upper bearing 32.

[0055] When the compression mechanism 70 is fixed inside the casing 11, part 1 71a is positioned between the outer circumferential surface 32S2 of the upper bearing 32 and the casing 11 in a top view.

[0056] In rotary compressors, for example, the casing and bearings were sometimes directly welded together. When carbon dioxide is used as a refrigerant, the refrigerant pressure is higher than with other refrigerants. When the refrigerant pressure is high, the casing needs to be thicker to withstand the pressure. When the casing is thicker, welding can not be performed without a higher welding temperature. If the welding temperature is high, the bearings may warp due to the heat, which can reduce their reliability.

[0057] In the rotary compressor 1, the thermal distortion of the upper bearing 32 can be reduced by welding the fixing member 71 to the casing 11.

[0058] According to the rotary compressor of the first embodiment, the fixing member is positioned on the cylinder side of the first bearing and has a second part that is fixed to the first bearing, thereby lowering the position in which the compression mechanism is fixed and suppressing vibration of the compression mechanism.

[0059] <Second Embodiment> A rotary compressor according to the second embodiment will now be described. The rotary compressor according to the second embodiment comprises a shaft extending in a first direction, a motor that drives the shaft, a first bearing that supports the shaft, a cylinder that forms a cylinder chamber inside, and a roller fixed to the shaft and rotating eccentrically in the cylinder chamber. The rotary compressor according to the second embodiment also comprises a casing that houses the shaft, motor, first bearing, cylinder and roller, and a fixing member housed in the casing that fixes the first bearing to the casing. Furthermore, the rotary compressor according to the first embodiment includes a suction pipe inserted through the casing, connected to a second bearing, and supplying refrigerant. In the rotary compressor according to the first embodiment, the motor, first bearing and cylinder are arranged in order along the first direction. The fixing member in the rotary compressor according to the second embodiment has a first part that is arranged between the outer circumferential surface of the first bearing and the casing and welded to the casing, and a second part that is arranged on the cylinder side of the first bearing and fixed to the first bearing. Furthermore, the first part of the fixing member in the rotary compressor according to the second embodiment has a notch at the position of the suction pipe. In the rotary compressor according to the second embodiment, the suction pipe is connected to the cylinder.

[0060] A rotary compressor according to the second embodiment will now be described in detail. Figure 5 is a cross-sectional view of rotary compressor 2, which is an example of a rotary compressor according to the second embodiment. Rotary compressor 2 is equipped with a compression mechanism 170 in place of the compression mechanism 70 provided in rotary compressor 1. Rotary compressor 2 is also equipped with a fixing member 171 in place of the fixing member 71 provided in rotary compressor 1. For components of rotary compressor 2 that are common with rotary compressor 1, please refer to the description of rotary compressor 1, and the description will be omitted here.

[0061] The compression mechanism 170 includes a cylinder 142 in place of the cylinder 42 in the compression mechanism 70. Furthermore, the compression mechanism 170 includes a lower bearing 131 in place of the lower bearing 31 in the compression mechanism 70.

[0062] In the compression mechanism 70, the suction pipe 12 is connected to the lower bearing 31, whereas in the compression mechanism 170, the suction pipe 12 is connected to the cylinder 142.

[0063] When the suction pipe 12 is connected to the cylinder 142, there is a possibility that the fixing member 171 and the suction pipe 12 may mechanically interfere with each other. Therefore, the fixing member 171 has a notch at the position where the suction pipe 12 is connected.

[0064] Figures 6 and 7 are perspective views of a fixing member 171 in a rotary compressor 2, which is an example of a rotary compressor according to the second embodiment. Figure 7 is a perspective view of the fixing member 171 from a different direction than that shown in Figure 6.

[0065] The fixing member 171 has a cylindrical first part 171a and an annular second part 171b. The first part 171a extends from the second part 171b in the +Z direction along the Z-axis. The second part 171b has an opening 171h at the center of a disc parallel to the XY plane. Having an opening 171h at the center of the disc gives the second part 171b an annular shape. A fillet is formed between the first part 171a and the second part 171b, for example. The second part 171b is positioned on the cylinder 142 side of the upper bearing 32. The second part 171b is fixed to the upper bearing 32.

[0066] Part 1 171a is welded to the casing when the compression mechanism 170 is fixed to the casing 11 by the fixing member 171.

[0067] The second part 171b has a plurality of through holes 171h1 through which bolts pass. The second part 171b also has a plurality of elongated holes 171h2 between the through holes 171h1. The second part 171b is fastened to the upper bearing 32 by bolts. The elongated holes 171h2 serve as passages for lubricating oil, for example, to flow from the top to the bottom of the casing 11.

[0068] The fixing member 171 has a notch 171c at the position where the suction pipe 12 is connected. The notch 171c is formed so that the fixing member 171 and the suction pipe 12 do not mechanically interfere with each other.

[0069] According to the rotary compressor of the second embodiment, the fixing member is positioned on the cylinder side of the first bearing and has a second part that is fixed to the first bearing, thereby lowering the position where the compression mechanism is fixed and suppressing vibration of the compression mechanism. Furthermore, according to the rotary compressor of the second embodiment, by providing a notch at the position of the suction pipe, vibration of the compression mechanism can be suppressed while preventing mechanical interference between the fixing member and the suction pipe.

[0070] <Third Embodiment> A rotary compressor according to the third embodiment will now be described. In the rotary compressor according to the second embodiment, the suction pipe is connected to the cylinder, whereas in the rotary compressor according to the third embodiment, the suction pipe is connected to the first bearing.

[0071] A rotary compressor according to the third embodiment will now be described in detail. Figure 8 is a cross-sectional view of a rotary compressor 3, which is an example of a rotary compressor according to the third embodiment. Rotary compressor 3 is equipped with a compression mechanism 270 in place of the compression mechanism 70 provided in rotary compressor 1. Rotary compressor 3 is also equipped with a fixing member 271 in place of the fixing member 71 provided in rotary compressor 1. For components of rotary compressor 3 that are common with rotary compressor 1, please refer to the description of rotary compressor 1, and the description will be omitted here.

[0072] The compression mechanism 270 is equipped with an upper bearing 232 in place of the upper bearing 32 in the compression mechanism 70. Furthermore, the compression mechanism 270 is equipped with a lower bearing 231 in place of the lower bearing 31 in the compression mechanism 70.

[0073] In the compression mechanism 70, the suction pipe 12 is connected to the lower bearing 31, whereas in the compression mechanism 270, the suction pipe 12 is connected to the upper bearing 232.

[0074] When the suction pipe 12 is connected to the upper bearing 232, the fixing member 271 and the suction pipe 12 mechanically interfere with each other. Therefore, the fixing member 271 has a notch at the position where the suction pipe 12 is connected.

[0075] Figures 9 and 10 are perspective views of a fixing member 271 in a rotary compressor 3, which is an example of a rotary compressor according to the third embodiment. Figure 9 is a perspective view of the fixing member 271 from a different direction than that shown in Figure 8.

[0076] The fixing member 271 has a cylindrical first part 271a and an annular second part 271b. The first part 271a extends from the second part 271b in the +Z direction along the Z-axis. The second part 271b has an opening 271h at the center of a disk parallel to the XY plane. Having an opening 271h at the center of the disk gives the second part 271b an annular shape. A fillet is formed between the first part 271a and the second part 271b, for example. The second part 271b is positioned on the cylinder 142 side of the upper bearing 232. The second part 271b is fixed to the upper bearing 232.

[0077] Part 1 271a is welded to the casing when the compression mechanism 270 is fixed to the casing 11 by the fixing member 271.

[0078] The second part 271b has a plurality of through holes 271h1 through which bolts pass. The second part 271b also has a plurality of elongated holes 271h2 between the through holes 271h1. The second part 271b is fastened to the upper bearing 32 by bolts. The elongated holes 271h2 serve as passages for lubricating oil, for example, to flow from the top to the bottom of the casing 11.

[0079] The fixing member 271 has a notch 271c at the position where the suction pipe 12 is connected. The notch 271c is formed so that the fixing member 271 and the suction pipe 12 do not mechanically interfere with each other.

[0080] According to the rotary compressor of the third embodiment, the fixing member is positioned on the cylinder side of the first bearing and has a second part that is fixed to the first bearing, thereby lowering the position where the compression mechanism is fixed and suppressing vibration of the compression mechanism. Furthermore, according to the rotary compressor of the third embodiment, by providing a notch at the position of the suction pipe, vibration of the compression mechanism can be suppressed while preventing mechanical interference between the fixing member and the suction pipe.

[0081] <Refrigeration equipment> A refrigeration system equipped with a rotary compressor according to this embodiment will be described. Figure 11 is a schematic diagram of a refrigeration system 100, which is an example of a refrigeration system equipped with a rotary compressor according to this embodiment.

[0082] The refrigeration system 100 includes a compressor 101, a four-way valve 102, a heat exchanger 103, an expansion valve 104, and a heat exchanger 105. The compressor 101 is a rotary compressor according to this embodiment.

[0083] First, we will explain the case where the refrigeration system 100 is cooled by the heat exchanger 105. Figure 11 shows the connections when the refrigeration system 100 is cooled by the heat exchanger 105.

[0084] The refrigerant compressed by the compressor 101 is supplied to the heat exchanger 103 through the four-way valve 102. In the heat exchanger 103, the refrigerant supplied to the heat exchanger 103 is cooled by heat exchange with air or the like. The refrigerant cooled in the heat exchanger 103 condenses and liquefies, and is supplied to the expansion valve 104. The refrigerant is depressurized by the expansion valve 104. The depressurized refrigerant is supplied to the heat exchanger 105. In the heat exchanger 105, the refrigerant evaporates and vaporizes. The refrigerant discharged from the heat exchanger 105 then returns to the compressor 101 and is compressed again. In the heat exchanger 105, the refrigeration device 100 cools the object by the heat of vaporization caused by the evaporation of the refrigerant.

[0085] Next, we will explain the case where the refrigeration system 100 is heated by the heat exchanger 105. The refrigerant compressed by the compressor 101 is supplied to the heat exchanger 105 through the four-way valve 102. In the heat exchanger 105, the refrigeration system 100 heats the object by supplying the compressed, high-temperature refrigerant. The refrigerant that has undergone heat exchange in the heat exchanger 105 condenses and liquefies, and is supplied to the expansion valve 104. The refrigerant is depressurized by the expansion valve 104. The depressurized refrigerant is supplied to the heat exchanger 103. In the heat exchanger 103, the refrigerant evaporates and vaporizes by exchanging heat with air or the like. The refrigerant discharged from the heat exchanger 103 then passes through the four-way valve 102 and returns to the compressor 101 to be compressed again.

[0086] Although embodiments have been described above, it will be understood that various modifications to the form and details are possible without departing from the spirit and scope of the claims. Various modifications and improvements are possible, such as combinations or substitutions with parts or all of other embodiments. [Explanation of Symbols]

[0087] 1, 2, 3 Rotary Compressors 10 Compressor body 11 Casing 12 Suction pipe 31, 131, 231 Lower bearing 32,232 Upper bearing 32S2 Outer surface 41, 42, 142 cylinders 61 Laura 62 Laura 70, 170, 270 Compression Mechanism 71, 171, 271 Fixing members 71a, 171a, 271a Part 1 71b, 171b, 271b Part 2 171c, 271c notches 72 volts 80 Motor 81 Shaft 100 Refrigeration equipment

Claims

1. A shaft (81) extending in the first direction (Z), A motor (80) that drives the shaft (81), The first bearing (232) supports the shaft (81), Cylinders (41, 42, 142) that form a cylinder chamber inside, A roller (61, 62) fixed to the shaft (81) and rotating eccentrically within the cylinder chamber, A casing (11) housing the shaft (81), the motor (80), the first bearing (232), the cylinders (41, 42, 142), and the rollers (61, 62), The fixing members (171, 271) housed in the casing (11) and fix the first bearing (232) to the casing (11), A suction pipe (12) is inserted into the casing (11) and supplies refrigerant to the cylinder chamber, Equipped with, The motor (80), the first bearing (232), and the cylinders (41, 42, 142) are arranged in order along the first direction (Z). The aforementioned fixing members (171, 271) are A first part (171a, 271a) is positioned between the outer circumferential surface (32S2) of the first bearing (232) and the casing (11), and is welded to the casing (11), The second part (171b, 272b) is positioned on the cylinder (41, 42, 142) side of the first bearing (232) and is fixed to the first bearing (232), It has, The first portion (171a, 271a) of the fixing member (171, 271) has notches (171c, 272c) at the position of the suction pipe (12). Rotary compressors (2, 3).

2. The suction pipe (12) is connected to the first bearing (232) or the cylinder (142). The rotary compressor (2, 3) according to claim 1.

3. A shaft (81) extending in the first direction (Z), A motor (80) that drives the shaft (81), The first bearing (32) supports the shaft (81), A cylinder (42) that forms a cylinder chamber inside, A roller (61, 62) fixed to the shaft (81) and rotating eccentrically within the cylinder chamber, The second bearing (31) supports the shaft (81), A casing (11) housing the shaft (81), the motor (80), the first bearing (32), the cylinder (42), the rollers (61, 62), and the second bearing (31), A fixing member (71) is housed in the casing (11) and fixes the first bearing (32) to the casing (11), A suction pipe (12) is inserted into the casing (11), connected to the second bearing (31), and supplies refrigerant. Equipped with, The motor (80), the first bearing (32), the cylinder (42), and the second bearing (31) are arranged in order along the first direction (Z). The aforementioned fixing member (71) is A first part (71a) is positioned between the outer circumferential surface (32S2) of the first bearing (32) and the casing (11), and is welded to the casing (11), The second part (171b, 272b) is positioned on the cylinder (42) side of the first bearing (32) and fixed to the first bearing (32), Having, Rotary compressor (1).

4. The fixing members (71, 171, 271) are fixed to the first bearing (32) by bolts. In the first direction (Z) view, the angle between the line connecting the axis of the shaft (81) and the bolt and the line connecting the axis of the shaft and the suction pipe (12) is 20 degrees or more. A rotary compressor (1, 2, 3) according to any one of claims 1 to 3.

5. The fixing members (71, 171, 271) are fixed to the first bearing (32) by three or more bolts. A rotary compressor (1, 2, 3) according to any one of claims 1 to 3.

6. A refrigeration system (100) comprising a rotary compressor (1, 2, 3) according to any one of claims 1 to 3.

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