Compressor and refrigeration cycle device

Abstract

This compressor comprises: a rotating shaft; a compression mechanism that compresses a refrigerant through rotation of the rotating shaft; and a sealed container that accommodates the rotating shaft and the compression mechanism. The compression mechanism comprises: a cylinder that is a cylindrical member having, in the interior thereof, a compression chamber where the refrigerant is compressed; a first frame that is disposed, in an axial direction of the rotating shaft, at one axial-direction end surface of the cylinder, an outer peripheral surface of the first frame being fixed to an inner peripheral surface of the sealed container; and a second frame that is disposed at the other axial-direction end surface of the cylinder. In the first frame, a frame-side intake path section is formed that is a through-hole that communicates between the exterior of the first frame and the compression chamber. The frame-side intake path section comprises: a horizontal hole section which forms a cylindrical space that extends inward, in a radial direction, from the outer peripheral surface of the first frame, and into which a tip section of a refrigerant intake pipe that penetrates from the exterior of the sealed container is inserted; and an oblique hole section which forms a cylindrical space that extends obliquely from an inner end, in the radial direction, of the horizontal hole section toward the compression chamber. The radially inner end side of the horizontal hole section is formed by only one inclined surface formed by the oblique hole section.

Description

Compressor and refrigeration cycle device

[0001] The present disclosure relates to a compressor and a refrigeration cycle device.

[0002] Conventionally, rotary compressors have been known that include, in their compression mechanism, an intermediate partition plate, upper and lower cylinders arranged above and below the intermediate partition plate, and rolling pistons fitted to eccentric portions of a rotary shaft within the cylinders, causing eccentric rotation within the cylinders (see, for example, Patent Document 1). The compressor of Patent Document 1 includes vanes that abut the rolling pistons to divide the interior of the cylinders into a low-pressure chamber and a high-pressure chamber, respectively, and upper and lower support members that close the upper and lower openings of the upper and lower cylinders and also serve as bearings for the rotary shaft. In the compressor of Patent Document 1, suction passages are formed in the upper and lower support members, extending radially inward from the outer peripheral surfaces of the upper and lower support members. Furthermore, in the compressor of Patent Document 1, suction ports are formed in the upper and lower cylinders, connecting the suction passages of the upper and lower support members with the low-pressure chamber.

[0003] Japanese Patent Application Laid-Open No. 2003-129982

[0004] However, in the compressor of Patent Document 1, the suction passage formed in the support members, such as the upper support member and the lower support member, has a right-angled surface, which is the surface of the passage along the axis of the rotary shaft, at the radially inner end side. Therefore, in the compressor of Patent Document 1, the refrigerant flowing through the suction passage may hit the right-angled surface, hindering the smooth flow of the refrigerant.

[0005] The present disclosure is intended to solve the above-mentioned problems, and has an object to provide a compressor and a refrigeration cycle device that can smooth the flow of refrigerant flowing into a compression mechanism.

[0006] The compressor according to the present disclosure includes a rotating shaft, a compression mechanism that compresses a refrigerant by rotation of the rotating shaft, and a sealed container that houses the rotating shaft and the compression mechanism. The compression mechanism has an internal compression chamber that compresses the refrigerant, and includes a cylinder that is a cylindrical member, a first frame that is arranged on one axial end face of the cylinder in the axial direction of the rotating shaft and has an outer peripheral surface fixed to the inner peripheral surface of the sealed container, and a second frame that is arranged on the other axial end face of the cylinder. The first frame has a frame-side suction passage that is a through hole that connects the outside of the first frame to the compression chamber. The frame-side suction passage forms a cylindrical space extending radially inward from the outer peripheral surface of the first frame. The frame-side suction passage forms a cylindrical space that extends radially inward from the outer peripheral surface of the first frame and has a horizontal hole into which a tip end of a refrigerant suction pipe that penetrates from the outside of the sealed container is inserted, and an oblique hole that forms a cylindrical space that extends obliquely from the radial inner end of the horizontal hole toward the compression chamber. The radial inner end side of the horizontal hole is formed with only a single inclined surface formed by the oblique hole.

[0007] The refrigeration cycle device according to the present disclosure includes a compressor having the above-described configuration, an outdoor heat exchanger that exchanges heat between outdoor air and the refrigerant flowing inside, a pressure reducing device that reduces the pressure of the refrigerant flowing inside, and an indoor heat exchanger that exchanges heat between indoor air and the refrigerant flowing inside.

[0008] In the compressor and refrigeration cycle apparatus according to the present disclosure, a first frame is formed with a frame-side suction passage, which is a through-hole that connects the outside of the first frame with the compression chamber. The frame-side suction passage is a cylindrical space extending radially inward from the outer peripheral surface of the first frame. The frame-side suction passage has a horizontal hole into which the tip of a refrigerant suction pipe penetrating from the outside of the sealed container is inserted, and an oblique hole that forms a cylindrical space extending obliquely from the radial inner end of the horizontal hole toward the compression chamber. In the compressor and refrigeration cycle apparatus, the radial inner end of the horizontal hole in the frame-side suction passage is formed with only a single inclined surface formed by the oblique hole. Therefore, in the compressor and refrigeration cycle apparatus, there is no right-angled surface along the axis of the rotation shaft at the radial inner end of the horizontal hole, allowing refrigerant flowing from the horizontal hole to the oblique hole to flow smoothly into the compression mechanism.

[0009] 1 is a schematic longitudinal sectional view of a compressor according to embodiment 1. FIG. 2 is a schematic transverse sectional view of a main part of the compressor according to embodiment 1. FIG. 3 is a schematic longitudinal sectional view of a part of the compression mechanism of the compressor according to embodiment 1. FIG. 4 is an explanatory view showing the angle formed between a horizontal hole portion and an oblique hole portion in the compressor according to embodiment 1. FIG. 5 is a processed sectional view of a frame-side suction path portion of an upper bearing used in the compressor according to embodiment 1. FIG. 6 is a schematic configuration diagram of a refrigeration cycle device such as an air conditioner to which the compressor according to embodiment 1 is connected. FIG. 7 is a schematic longitudinal sectional view of a compressor according to embodiment 2. FIG. 8 is a schematic longitudinal sectional view of a part of the compression mechanism of the compressor according to embodiment 2. FIG. 9 is an explanatory view showing the angle formed between a horizontal hole portion and an oblique hole portion in the compressor according to embodiment 2. FIG. 10 is a processed sectional view of a frame-side suction path portion of a lower bearing used in the compressor according to embodiment 2.

[0010] A compressor and a refrigeration cycle device according to an embodiment will be described below with reference to the drawings. Note that in the following drawings, including FIG. 1, the relative dimensional relationships and shapes of the components may differ from those in reality. In the following drawings, the same reference numerals denote the same or equivalent components, and this applies throughout the entire specification. To facilitate understanding, terms indicating directions (e.g., "up," "down," "right," "left," "front," "rear," etc.) are used as appropriate, but these notations are merely used for the convenience of explanation and do not limit the arrangement or orientation of the device or components.

[0011] Embodiment 1 [Configuration of Compressor 1] Fig. 1 is a schematic vertical cross-sectional view of a compressor 1 according to Embodiment 1. The compressor 1, which is a hermetic compressor, will be described using Fig. 1. The compressor 1 draws in a low-temperature, low-pressure refrigerant, compresses the drawn refrigerant, and discharges a high-temperature, high-pressure refrigerant.

[0012] The compressor 1 is a single-cylinder rotary compressor, and is a fluid machine that discharges low-pressure gas refrigerant drawn into the compressor 1 as high-pressure gas refrigerant. Note that the single-cylinder rotary compressor is an example, and rotary compressors of other structures, such as a two-cylinder rotary compressor, may also be used.

[0013] The compressor 1 includes a rotating shaft 51, an electric motor 4, a compression mechanism 5 that is driven by the electric motor 4 and compresses the refrigerant by rotation of the rotating shaft 51, and a sealed container 2 that houses the rotating shaft 51, the electric motor 4, and the compression mechanism 5. The compressor 1 houses, inside the sealed container 2, the compression mechanism 5 that compresses the refrigerant and the electric motor 4 that drives the compression mechanism 5. The compressor 1 has the compression mechanism 5 housed in a lower part of the sealed container 2, and the electric motor 4 housed in an upper part of the sealed container 2.

[0014] The sealed container 2 forms the outer shell and external appearance of the compressor 1, and includes a substantially cylindrical body 21, a substantially hemispherical upper lid 22, and a substantially hemispherical lower lid 23. The sealed container 2 has the upper lid 22 welded to the top of the body 21, and the lower lid 23 welded to the bottom of the body 21. The sealed container 2 is provided on a base 3, and the lower lid 23 is fixed to the base 3. When the compressor 1 is installed, the base 3 is fixed to the installation location with bolts or the like.

[0015] A refrigerant suction pipe 7a, through which refrigerant passes to be drawn into a compression chamber 52a (see FIG. 2), which will be described later, is connected to the body 21 of the sealed container 2. The compressor 1 has a through-hole formed in the body 21 of the sealed container 2, and the refrigerant suction pipe 7a is inserted into this through-hole from the outside and connected to the body 21. The tip of the refrigerant suction pipe 7a protrudes into the inside of the sealed container 2 and is inserted into and connected to a horizontal hole 153b (see FIG. 3) of a frame-side suction passage 153 provided in an upper bearing 53, which will be described later.

[0016] A refrigerant discharge pipe 7b that discharges compressed refrigerant to the outside of the sealed container 2 is connected to the upper lid 22 of the sealed container 2. The refrigerant discharge pipe 7b is a refrigerant piping that discharges high-pressure gas refrigerant to the outside of the sealed container 2. The fixed portion of the refrigerant discharge pipe 7b and the upper lid 22 is joined by, for example, brazing or resistance welding.

[0017] The interior of the sealed container 2 is filled with compressed, high-temperature, high-pressure refrigerant gas. Refrigeration oil is stored in the lower portion, i.e., the bottom, of the sealed container 2 to lubricate the compression mechanism 5. The compressor 1 is provided with an oil pump (not shown) that pumps up refrigeration oil below the rotating shaft 51. As the rotating shaft 51 rotates, the oil pump draws up the refrigeration oil stored in the bottom of the sealed container 2 and supplies it to each sliding part of the compression mechanism 5. This ensures mechanical lubrication of the compression mechanism 5 in the compressor 1.

[0018] (Motor 4) The motor 4 is disposed inside the sealed container 2 and is used to drive the compression mechanism 5. The motor 4 is a motor that generates a rotational driving force in the rotary shaft 51 using power supplied from an external power source and transmits the rotational driving force to the compression mechanism 5 via the rotary shaft 51. The motor 4 may be, for example, a brushless DC motor.

[0019] The electric motor 4 includes a stator 41 having a hollow cylindrical appearance when viewed from above, and a rotor 42 that is rotatably disposed inside the stator 41 and rotates by magnetic action. The stator 41 is formed by laminating stator core sheets that are formed by punching thin electromagnetic steel sheets. The core that forms the stator 41 has, for example, an outer diameter larger than the inner diameter of the body portion 21, and is fixed to the inner wall of the body portion 21 by shrink fitting.

[0020] The electric motor 4 has a stator 41 fixed to the inner circumferential surface of the body 21 of the sealed container 2, and a rotor 42 arranged inside the stator 41 with a small gap provided. The stator 41 and the body 21 are fixed together by arc spot welding, shrink fitting, or the like. The stator 41 is connected to a terminal 6a attached to the center of the upper lid 22 by a lead wire 6b, and power is supplied to the electric motor 4 from the terminal 6a via the lead wire 6b. In the electric motor 4, power is supplied from an external power source to the stator 41 via the lead wire 6b, causing the rotor 42 to rotate inside the stator 41.

[0021] (Compression mechanism 5) Figure 2 is a schematic cross-sectional view of a main portion of the compressor 1 according to the first embodiment. Figure 3 is a schematic longitudinal-sectional view of a portion of the compression mechanism 5 of the compressor 1 according to the first embodiment. The compression mechanism 5 will be described with reference to Figures 1 to 3. The compression mechanism 5 is operated by the electric motor 4 and compresses fluid drawn in from the outside. The compression mechanism 5 compresses low-pressure refrigerant gas drawn into the compression mechanism 5 from the refrigerant suction pipe 7a by the rotational driving force supplied from the electric motor 4 into high-pressure refrigerant gas, and discharges the compressed high-pressure refrigerant gas above the compression mechanism 5.

[0022] The compression mechanism 5 has a cylinder 52 , an upper bearing 53 , a lower bearing 54 , a rolling piston 55 , and a vane 56 , and includes a rotary shaft 51 .

[0023] 2, the compression mechanism 5 includes a hollow cylindrical cylinder 52. The cylinder 52 has a compression chamber 52a therein for compressing the refrigerant, and is a cylindrical member formed in a cylindrical shape with both ends open in the axial direction of the rotating shaft 51. The inner diameter of the cylinder 52 is, for example, 40 mm or 44 mm, and the outer diameter of the cylinder 52 is, for example, 107 mm or 132.1 mm.

[0024] Cylinder 52 is formed in a hollow cylindrical shape, and has a through-hole in the center that is concentric with the axis of rotary shaft 51. This through-hole is closed by an upper bearing 53 arranged in contact with the upper end surface of cylinder 52 and a lower bearing 54 arranged in contact with the lower end surface of cylinder 52, thereby forming compression chamber 52a. In other words, compression chamber 52a is formed inside cylinder 52.

[0025] The compression chamber 52a contains an eccentric portion 51a of the rotary shaft 51 that performs eccentric motion inside the compression chamber 52a, and a rolling piston 55 that fits into the eccentric portion 51a of the rotary shaft 51. The compression chamber 52a also contains a vane 56 that separates the compression chamber 52a, which is formed between an inner peripheral wall 52h of the cylinder 52 and an outer peripheral wall 55a of the rolling piston 55.

[0026] The rolling piston 55 is formed in a cylindrical shape. The rolling piston 55 is attached to the outer periphery of the eccentric portion 51 a of the rotary shaft 51 inside the cylinder 52. When the rotary shaft 51 is rotated by the electric motor 4, the rolling piston 55 rotates inside the cylinder 52 along its inner circumferential wall 52 h. The rotation of the rotary shaft 51 causes the rolling piston 55 to rotate eccentrically inside the compression chamber 52 a.

[0027] A vane groove 52d is formed in the cylinder 52. The vane groove 52d is a groove that extends in the radial direction of the cylinder 52. One end of the vane groove 52d in the radial direction of the cylinder 52 opens into the compression chamber 52a and communicates with the compression chamber 52a, and the other end is provided with a back pressure chamber 52e. A vane 56 is housed in the vane groove 52d.

[0028] The vane 56 is inserted into a vane groove 52d provided in the cylinder 52. The vane 56 is arranged to reciprocate radially within the vane groove 52d. When attached to the vane groove 52d, the vane 56 has a substantially rectangular parallelepiped shape such that the thickness in the circumferential direction of the compression chamber 52a is smaller than the radial and axial lengths of the compression chamber 52a.

[0029] A spring 57 is provided in the back pressure chamber 52e of the vane groove 52d. In the compression mechanism 5, high-pressure refrigerant gas inside the sealed container 2 flows into the back pressure chamber 52e, and a pressure difference between the pressure of the refrigerant gas in the back pressure chamber 52e and the pressure of the refrigerant gas in the compression chamber 52a generates a force that moves the vane 56 radially toward the center of the compression chamber 52a. In the compression mechanism 5, the force due to the pressure difference between the back pressure chamber 52e and the compression chamber 52a and the force of the spring 57 pressing the vane 56 radially move the vane 56 radially toward the center of the compression chamber 52a.

[0030] The force moving the vane 56 in the radial direction causes one end of the vane 56, i.e., the end on the compression chamber 52a side, to abut against the cylindrical outer peripheral wall 55a of the rolling piston 55. This allows the vane 56 to separate the space formed by the inner peripheral wall 52h of the cylinder 52 and the outer peripheral wall 55a of the rolling piston 55. The vane 56 is pressed radially inward by a spring 57 or the like, and comes into contact with the outer peripheral surface of the rolling piston 55, separating the compression chamber 52a into a low-pressure chamber 52f and a high-pressure chamber 52g.

[0031] In the compressor 1, the pressure of the refrigerant gas inside the sealed container 2, i.e., the pressure difference between the pressure of the refrigerant gas in the back pressure chamber 52e and the pressure of the refrigerant gas inside the compression chamber 52a, may not be sufficient to press the vane 56 against the outer peripheral wall 55a of the rolling piston 55. Even in such cases, the compression mechanism 5 can press one end of the vane 56 against the outer peripheral wall 55a of the rolling piston 55 using the force of the spring 57, so that one end of the vane 56 can always abut against the outer peripheral wall 55a of the rolling piston 55. In the compression mechanism 5, one end of the vane 56, which reciprocates radially within the vane groove 52d provided in the cylinder 52, abuts against the outer peripheral wall 55a of the rolling piston 55, thereby dividing the compression chamber 52a into a low-pressure chamber 52f and a high-pressure chamber 52g.

[0032] The cylinder 52 has an inner peripheral surface formed with a cylinder-side intake passage 52b communicating with the low-pressure chamber 52f and a discharge port 52c (see FIG. 2) communicating with the high-pressure chamber 52g.

[0033] The cylinder 52 includes a cylinder-side suction passage 52b formed radially outward of the compression chamber 52a of the cylinder 52 and allowing the refrigerant to flow from the oblique hole 153a to the compression chamber 52a. The cylinder-side suction passage 52b is connected to a frame-side suction passage 153 of the upper bearing 53, which will be described later, and is a through-hole through which the refrigerant passes as it is drawn from the outside of the sealed container 2 into the compression chamber 52a.

[0034] The cylinder side suction path portion 52b is formed to extend, for example, in the radial direction and the up-down direction in the cylinder 52. The cylinder side suction path portion 52b is inclined with respect to the axial direction of the rotary shaft 51 in a vertical cross section taken along the axial direction and the radial direction of the rotary shaft 51.

[0035] Cylinder-side suction path 52b defines a perfectly circular cylindrical space, and a portion of cylinder-side suction path 52b facing oblique hole 153a in the axial direction of rotating shaft 51 is formed with inclined surface 52b2 having the same diameter and inclination angle as oblique hole 153a. In a vertical cross section taken along the axial and radial directions of rotating shaft 51, inclined surface 52b2 is inclined so as to face radially inward and upward in the axial direction of rotating shaft 51.

[0036] Cylinder-side suction path 52b and oblique hole 153a are configured with holes of the same diameter at least at the connection portion between cylinder-side suction path 52b and oblique hole 153a. Furthermore, cylinder-side suction path 52b and oblique hole 153a are formed so as to be inclined at the same inclination angle with respect to rotation shaft 51 at least at the connection portion between cylinder-side suction path 52b and oblique hole 153a in a vertical cross section along the axial and radial directions of rotation shaft 51.

[0037] The cylinder-side suction path 52b is formed so that the cross section of the flow path perpendicular to the flow path direction is a perfect circle. Note that the cross section of the flow path of the cylinder-side suction path 52b is preferably a perfect circle, but is not limited to a perfect circle. The cross section of the flow path of the cylinder-side suction path 52b may have various shapes, such as a perfect circle or an ellipse.

[0038] The cylinder side suction path 52b is inclined downward from the outer periphery toward the inner periphery in the radial direction of the cylinder 52. The cylinder side suction path 52b is inclined toward the compression chamber 52a of the cylinder 52 from the outer periphery toward the inner periphery in the radial direction of the cylinder 52. The cylinder side suction path 52b is inclined from the outer periphery toward the inner periphery in the radial direction of the cylinder 52 from the top to the bottom in the axial direction of the rotating shaft 51.

[0039] The cylinder side intake path portion 52b of the cylinder 52 has one end connected to the frame side intake path portion 153 of the upper bearing 53 described later, and the other end connected to the low pressure chamber 52f of the compression chamber 52a of the cylinder 52.

[0040] Openings at both axial ends of the hollow cylindrical cylinder 52 are closed by an upper bearing 53 and a lower bearing 54. In the compressor 1, a compression chamber 52a is formed by a space surrounded by the rolling piston 55, the cylinder 52, the upper bearing 53, and the lower bearing 54, which compresses the low-pressure gas refrigerant sucked through the refrigerant suction pipe 7a.

[0041] The upper bearing 53 and the lower bearing 54 support the rotating shaft 51. The upper bearing 53 is fitted onto the main shaft portion 51b of the rotating shaft 51 to rotatably support the main shaft portion 51b, and closes one axial opening of the cylinder 52. Similarly, the lower bearing 54 is fitted onto the counter shaft portion 51c of the rotating shaft 51 to rotatably support the counter shaft portion 51c, and closes one axial opening of the cylinder 52. The upper bearing 53 is a first frame 58a of the compressor 1, and the lower bearing 54 is a second frame 58b of the compressor 1.

[0042] Furthermore, the upper bearing 53 and the lower bearing 54 are collectively referred to as bearings 58. The bearings 58 close the opening of the cylinder 52 and rotatably support the rotating shaft 51. Of the two bearings 58, one bearing 58 is referred to as a first frame 58a, and the other bearing 58 is referred to as a second frame 58b. The first frame 58a is disposed on one axial end face of the cylinder 52 in the axial direction of the rotating shaft 51, and its outer peripheral surface is fixed to the inner peripheral surface of the sealed container 2. The second frame 58b is disposed on the other axial end face of the cylinder 52.

[0043] The upper bearing 53 is arranged on one axial end face of the cylinder 52 in the axial direction of the rotating shaft 51, and its outer circumferential surface is fixed to the inner circumferential surface of the sealed container 2. The lower bearing 54 is arranged on the other axial end face of the cylinder 52. The upper bearing 53 is formed in a substantially inverted T-shape in side view, and the lower bearing 54 is formed in a substantially T-shape in side view. The upper bearing 53 is fixed at multiple points to the inner circumferential surface of the body portion 21 of the sealed container 2 by arc spot welding. The lower bearing 54 is fixed to the underside of the cylinder 52.

[0044] The upper bearing 53 includes an upper closing portion 53a formed in a plate or columnar shape. The upper closing portion 53a has a thickness in the axial direction of the rotating shaft 51. The upper closing portion 53a is formed, for example, in a disk or columnar shape. As an example, the upper closing portion 53a is formed in a substantially circular shape in a plan view, but the shape in a plan view is not limited to a substantially circular shape. An upper opening 53b, through which the rotating shaft 51 passes, is formed in the center of the upper closing portion 53a.

[0045] The lower bearing 54 includes a lower blocking portion 54a formed in a plate or columnar shape. The lower blocking portion 54a has a thickness in the axial direction of the rotating shaft 51. The lower blocking portion 54a is formed, for example, in a disk or columnar shape. As an example, the lower blocking portion 54a is formed in a substantially circular shape in a plan view, but the shape in a plan view is not limited to a substantially circular shape. A lower opening 54b, through which the rotating shaft 51 passes, is formed in the center of the lower blocking portion 54a.

[0046] A frame-side intake path 153 is formed in the upper closing portion 53a of the upper bearing 53, extending inward from the radially outer end and penetrating obliquely at the radially inner portion toward the lower end face of the upper bearing 53. The lower end face of the upper bearing 53 is the end face facing the cylinder 52. The detailed structure of the frame-side intake path 153 will be described later.

[0047] The upper bearing 53 is provided with a discharge port (not shown) that discharges compressed refrigerant gas to the outside of the compression chamber 52a. A discharge valve (not shown) is provided in the discharge port (not shown) of the upper bearing 53. The discharge valve controls the timing of discharge of high-temperature, high-pressure refrigerant gas discharged from the cylinder 52 through the discharge port. The discharge valve closes until the refrigerant gas compressed inside the compression chamber 52a of the cylinder 52 reaches a predetermined pressure, and opens the valve when the refrigerant gas inside the compression chamber 52a reaches or exceeds the predetermined pressure, thereby discharging the high-temperature, high-pressure refrigerant gas to the outside of the compression chamber 52a.

[0048] (Rotating shaft 51) The rotating shaft 51 is inserted into and fixed to the center of the rotor 42 of the electric motor 4. The axis of the rotating shaft 51 coincides with the center line of the body portion 21. The compression mechanism 5 is connected to the electric motor 4 via the rotating shaft 51. The rotating shaft 51 transmits the rotational motion of the electric motor 4 to the compression mechanism 5. In the compression mechanism 5, the refrigerant gas is compressed by the rotational force of the electric motor 4 transmitted by the rotating shaft 51, and the compressed refrigerant gas is discharged into the sealed container 2.

[0049] The rotating shaft 51 has a main shaft portion 51b, an eccentric portion 51a, and a counter shaft portion 51c. The main shaft portion 51b, the eccentric portion 51a, and the counter shaft portion 51c are provided in this order in the axial direction of the rotating shaft 51 from the side where the electric motor 4 is disposed toward the side where the compression mechanism 5 is disposed. In the compressor 1, the rotor 42 of the electric motor 4 is fixed to the main shaft portion 51b by shrink fitting or press fitting, and a cylindrical rolling piston 55 (described later) is slidably fitted into the eccentric portion 51a.

[0050] The rotating shaft 51 has an eccentric portion 51a that is eccentric in one direction. The rotating shaft 51 has the eccentric portion 51a that is disposed in a position corresponding to the cylinder 52 inside the compression mechanism 5. A substantially cylindrical rolling piston 55 that is rotatably attached along the outer surface of the eccentric portion 51a is disposed on the outer periphery of the eccentric portion 51a.

[0051] The refrigerant gas is repeatedly drawn, compressed, and discharged from the compression chamber 52a. Therefore, the refrigerant gas is intermittently discharged from the discharge port, which may generate noise such as pulsating sounds. To reduce noise caused by the refrigerant gas, the compression mechanism 5 includes a discharge muffler 61 attached to the outer side of the upper bearing 53, i.e., on the motor 4 side of the upper bearing 53, so as to cover the upper bearing 53.

[0052] The discharge muffler 61 is provided with a discharge hole (not shown) that connects the space formed by the discharge muffler 61 and the upper bearing 53 to the internal space of the sealed container 2. The refrigerant gas discharged from the cylinder 52 through the discharge port is first discharged into the space formed by the discharge muffler 61 and the upper bearing 53, and then discharged from the discharge hole of the discharge muffler 61 into the internal space of the sealed container 2.

[0053] 2 and 3, the configuration of the frame-side suction path 153 will be described in detail. As shown in Fig. 3, the upper bearing 53, which is the first frame 58a, is formed with the frame-side suction path 153, which is a through-hole that connects the outside of the upper bearing 53, which is the first frame 58a, with the compression chamber 52a. The frame-side suction path 153 is a refrigerant suction hole in the compression mechanism 5. The frame-side suction path 153 is formed in one of the two bearings 58.

[0054] In the first embodiment, the frame-side intake path 153 is formed in the upper bearing 53, which is the first frame 58a. The frame-side intake path 153 has a horizontal hole 153b that forms a perfectly circular cylindrical space extending radially inward from the outer peripheral surface of the upper bearing 53, and an oblique hole 153a that forms a perfectly circular cylindrical space extending obliquely from a radial inner end 153b1 of the horizontal hole 153b toward the compression chamber 52a. The frame-side intake path 153 is such that the horizontal hole 153b and the oblique hole 153a intersect on the radial inner end 153b1 side of the horizontal hole 153b.

[0055] The horizontal hole 153b and the oblique hole 153a are formed so that the cross section of the flow path perpendicular to the flow path direction is a perfect circle. Note that the cross sections of the flow path of the horizontal hole 153b and the oblique hole 153a are preferably, but not limited to, a perfect circle. The cross sections of the flow path of the horizontal hole 153b and the oblique hole 153a include various shapes, such as a perfect circle or an ellipse.

[0056] The diameter of the horizontal hole 153b and the diameter of the oblique hole 153a are the same. The diameters of the horizontal hole 153b and the oblique hole 153a of the frame-side intake path 153 are, for example, 7 mm, 9.8 mm, or 16 mm.

[0057] The lateral hole 153b is formed in the upper closed portion 53a of the upper bearing 53 so as to extend radially. The outer peripheral end of the lateral hole 153b forms an opening in the outer peripheral surface of the upper closed portion 53a of the upper bearing 53. The tip of the refrigerant suction pipe 7a, which penetrates from the outside of the sealed container 2, is inserted into the lateral hole 153b. The tip of the refrigerant suction pipe 7a protrudes into the sealed container 2 and is inserted and connected to the lateral hole 153b of the frame-side suction path 153 provided in the upper bearing 53. The outer peripheral end of the lateral hole 153b is connected to the tip of the refrigerant suction pipe 7a, and the internal space of the lateral hole 153b communicates with the internal space of the refrigerant suction pipe 7a.

[0058] The inner end of lateral hole 153b is connected to oblique hole 153a. The radially inner end 153b1 of lateral hole 153b is formed by a single inclined surface 153c formed by oblique hole 153a. Inclined surface 153c is configured to face the tip of refrigerant suction pipe 7a at the intersection with lateral hole 153b in the radial direction of cylinder 52.

[0059] The oblique hole portion 153a is formed to extend radially and vertically in the upper closed portion 53a of the upper bearing 53. The oblique hole portion 153a is inclined with respect to the axial direction of the rotating shaft 51 in a vertical cross section along the axial and radial directions of the rotating shaft 51.

[0060] The oblique hole portion 153a is inclined downward from the outer circumferential side toward the inner circumferential side in the radial direction in the upper closed portion 53a of the upper bearing 53. The oblique hole portion 153a is inclined toward the cylinder 52 from the outer circumferential side toward the inner circumferential side in the radial direction in the upper closed portion 53a of the upper bearing 53. The oblique hole portion 153a is inclined from the outer circumferential side toward the inner circumferential side in the radial direction in the axial direction of the rotating shaft 51 from the top to the bottom.

[0061] Oblique hole portion 153a has an inclined surface 153c at a portion facing horizontal hole portion 153b in a vertical cross section taken along the axial and radial directions of rotating shaft 51. Oblique hole portion 153a has an inner wall formed by a single inclined surface 153c in a vertical cross section taken along the axial and radial directions of rotating shaft 51. In other words, oblique hole portion 153a does not have an inner wall formed by a plurality of inclined surfaces at different angles in a vertical cross section taken along the axial and radial directions of rotating shaft 51.

[0062] The inclined surface 153c is inclined downward from the outer circumferential side toward the inner circumferential side in the radial direction in a vertical cross section along the axial and radial directions of the rotating shaft 51. The inclined surface 153c is inclined from the outer circumferential side toward the inner circumferential side in the radial direction as it goes from top to bottom in the axial direction of the rotating shaft 51. The inclined surface 153c is inclined so as to face the outer circumferential side in the radial direction and the lower side in the axial direction of the rotating shaft 51 in a vertical cross section along the axial and radial directions of the rotating shaft 51. The inclined surface 153c faces the inclined surface 52b2 of the cylinder 52 in the axial direction of the rotating shaft 51.

[0063] The oblique hole 153a communicates with the cylinder-side suction path 52b of the cylinder 52, which is formed in communication with the compression chamber 52a. One end of the oblique hole 153a communicates with the horizontal hole 153b, and the other end communicates with the cylinder-side suction path 52b. As a result, the frame-side suction path 153 formed in the upper closing portion 53a of the upper bearing 53 communicates with the compression chamber 52a of the cylinder 52 via the cylinder-side suction path 52b of the cylinder 52.

[0064] 4 is an explanatory diagram showing the angle α formed between the lateral hole 153b and the oblique hole 153a in the compressor 1 according to the first embodiment. As shown in FIG. 4 , the compressor 1 is configured such that the angle α formed between the lateral hole axis L1 of the lateral hole 153b and the oblique hole axis L2 of the oblique hole 153a is 120° in a vertical cross section taken along the axial and radial directions of the rotating shaft 51. Note that the angle α is the angle formed between the lateral hole axis L1 of the lateral hole 153b and the oblique hole axis L2 of the oblique hole 153a in a vertical cross section taken along the axial and radial directions of the rotating shaft 51, and is an angle directed radially outward and axially downward.

[0065] Figure 5 is a cross-sectional view of the frame-side suction passage 153 of the upper bearing 53 used in the compressor 1 according to Embodiment 1. Using Figure 5, a case will be described in which the frame-side suction passage 153 is cut with a drill D in the upper bearing 53 so that the angle α between the horizontal hole axis L1 and the oblique hole axis L2 is 120°. The angle β of the cutting edge D1 of the drill D used to form the frame-side suction passage 153 is 120°.

[0066] The lateral hole portion 153b is formed by advancing the drill D from the outer circumferential side toward the inner circumferential side in the radial direction of the upper bearing 53. The oblique hole portion 153a is formed by advancing the drill D obliquely from the lower side of the upper bearing 53 so that the angle α with respect to the lateral hole portion 153b is 120°.

[0067] 5, when forming the frame-side intake passage portion 153 of the upper bearing 53, by using a drill D having a cutting edge D1 with an angle β of 120°, it is possible to prevent a step from occurring at the intersection of the lateral hole portion 153b and the oblique hole portion 153a. Furthermore, because the lateral hole portion 153b and the oblique hole portion 153a are holes that form cylindrical spaces that are perfect circles, they can be formed by cutting using only the same drill D. This allows the upper bearing 53 to be manufactured at a lower cost than when different types of drills are used.

[0068] 4 and 5 , upper bearing 53 is configured with horizontal hole portion 153b forming a perfectly circular cylindrical space relative to upper bearing 53 and oblique hole portion 153a forming a perfectly circular cylindrical space such that angle α between horizontal hole axis L1 and oblique hole axis L2 is 120°. However, upper bearing 53 is not limited to a configuration in which angle α between horizontal hole axis L1 and oblique hole axis L2 is 120°. Compression mechanism 5 is configured such that angle α between horizontal hole axis L1, which is the axis of horizontal hole portion 153b, and oblique hole axis L2, which is the axis of oblique hole portion 153a, is in the range of 110° to 150°.

[0069] For example, upper bearing 53 may be configured with horizontal hole portion 153b forming a perfect circular cylindrical space relative to upper bearing 53 and oblique hole portion 153a forming a perfect circular cylindrical space, so that the angle α between horizontal hole axis L1 and oblique hole axis L2 is 110°. In this configuration, when cutting horizontal hole portion 153b forming a perfect circular cylindrical space relative to upper bearing 53 and oblique hole portion 153a forming a perfect circular cylindrical space with drill D, a drill D having a cutting edge D1 with an angle β of 140° is used. By using a drill D having a cutting edge D1 with an angle β of 140° to cut frame-side suction passage portion 153 of upper bearing 53, it is possible to prevent a step from occurring at the intersection of horizontal hole portion 153b and oblique hole portion 153a.

[0070] For example, upper bearing 53 may be configured with horizontal hole portion 153b forming a perfect circular cylindrical space relative to upper bearing 53 and oblique hole portion 153a forming a perfect circular cylindrical space, so that the angle α between horizontal hole axis L1 and oblique hole axis L2 is 115°. In this configuration, when cutting horizontal hole portion 153b forming a perfect circular cylindrical space relative to upper bearing 53 and oblique hole portion 153a forming a perfect circular cylindrical space with drill D, a drill D having a cutting edge D1 with an angle β of 130° is used. By using a drill D having a cutting edge D1 with an angle β of 130° to cut frame-side suction passage portion 153 of upper bearing 53, it is possible to prevent a step from occurring at the intersection of horizontal hole portion 153b and oblique hole portion 153a.

[0071] For example, upper bearing 53 may be configured with horizontal hole portion 153b forming a perfect circular cylindrical space relative to upper bearing 53 and oblique hole portion 153a forming a perfect circular cylindrical space such that angle α between horizontal hole axis L1 and oblique hole axis L2 is 121°. In this configuration, when cutting horizontal hole portion 153b forming a perfect circular cylindrical space relative to upper bearing 53 and oblique hole portion 153a forming a perfect circular cylindrical space with drill D, a drill D having a cutting edge D1 with an angle β of 118° is used. By using a drill D having a cutting edge D1 with an angle β of 118° to cut frame-side suction passage portion 153 of upper bearing 53, it is possible to prevent a step from occurring at the intersection between horizontal hole portion 153b and oblique hole portion 153a.

[0072] [Operation of Compressor 1] Next, a description will be given of the operation of the compressor 1 according to embodiment 1. The compressor 1 configured as described above is used by being connected to an evaporator of a refrigeration cycle via a refrigerant suction pipe 7a and to a condenser of the refrigeration cycle via a refrigerant discharge pipe 7b, for example.

[0073] When power is supplied to the electric motor 4 from outside the compressor 1 through the terminal 6a, the rotating shaft 51 fixed to the rotor 42 rotates around its axis, and the refrigerant is sucked from the refrigeration cycle into the low-pressure chamber 52f through the refrigerant suction pipe 7a and the frame-side suction path portion 153.

[0074] When the electric motor 4 is operated to rotate the rotary shaft 51, the rotational movement of the rotary shaft 51 causes the eccentric portion 51a of the rotary shaft 51 to rotate inside the compression chamber 52a of the cylinder 52. When the electric motor 4 is operated to rotate the rotary shaft 51, the eccentric portion 51a and the rolling piston 55 housed inside the cylinder 52 rotate eccentrically together with the rotary shaft 51. Due to the eccentric rotation of the eccentric portion 51a and the rolling piston 55, an outer peripheral wall 55a of the rolling piston 55 moves in contact with an inner peripheral wall 52h of the cylinder 52 in the compression chamber 52a of the cylinder 52.

[0075] A vane 56 disposed in a vane groove 52d formed in the cylinder 52 performs piston-like motion in conjunction with the eccentric rotation of a rolling piston 55 inside the cylinder 52. The low-pressure gas refrigerant that flows into the compression mechanism 5 from the refrigerant suction pipe 7a flows into a low-pressure chamber 52f of the compression chamber 52a, which is an enclosed space surrounded by the rolling piston 55, the cylinder 52, the vane 56, the upper bearing 53, and the lower bearing 54.

[0076] The refrigerant drawn into the low-pressure chamber 52f is compressed as the volume of the compression chamber 52a decreases due to the eccentric movement of the rolling piston 55. The compressed, high-pressure refrigerant is discharged from the high-pressure chamber 52g into the sealed container 2 through the discharge port 52c and a discharge port (not shown) formed in the upper bearing 53. This places the inside of the sealed container 2 in a high-pressure state. The high-pressure refrigerant in the sealed container 2 is discharged into the refrigeration cycle through the refrigerant discharge pipe 7b.

[0077] [Configuration of Refrigeration Cycle Apparatus 200] Figure 6 is a schematic diagram of a refrigeration cycle apparatus 200, such as an air conditioner, to which the compressor 1 according to the first embodiment is connected. The refrigeration cycle apparatus 200 includes the compressor 1, an outdoor heat exchanger 104 that exchanges heat between outdoor air and the refrigerant flowing therethrough, a pressure reducing device 105 that reduces the pressure of the refrigerant flowing therethrough, and an indoor heat exchanger 106 that exchanges heat between indoor air and the refrigerant flowing therethrough. The refrigeration cycle apparatus 200 may also include a flow path switching device 103. The refrigeration cycle apparatus 200 also includes an intake muffler 101 that is connected to the intake side of the compressor 1. While it is desirable for the refrigeration cycle apparatus 200 to include the intake muffler 101, the refrigeration cycle apparatus 200 does not necessarily need to include the intake muffler 101.

[0078] In the refrigeration cycle apparatus 200, a compressor 1, a flow path switching device 103, an outdoor heat exchanger 104, a pressure reducing device 105, and an indoor heat exchanger 106 are connected in sequence via refrigerant piping to form a refrigerant circuit 201 through which the refrigerant circulates. Note that in the refrigeration cycle apparatus 200 such as an air conditioner, the indoor heat exchanger 106 is often mounted in a device located indoors, and the compressor 1, flow path switching device 103, the outdoor heat exchanger 104, and the pressure reducing device 105 are often mounted in a device located outdoors.

[0079] The flow path switching device 103 is, for example, a four-way valve, and switches the flow direction of the refrigerant. The flow path switching device 103 is connected to the discharge side of the compressor 1. The outdoor heat exchanger 104 exchanges heat between the outdoor air and the refrigerant flowing inside the outdoor heat exchanger 104. The outdoor heat exchanger 104 functions as a condenser or an evaporator depending on the flow direction of the refrigerant. The pressure reducing device 105 reduces the pressure of the refrigerant that flows out of the condenser and into the pressure reducing device 105 and flows inside the pressure reducing device 105. The pressure reducing device 105 is, for example, a pressure reducing device that performs electric expansion, etc.

[0080] The pressure reducing device 105 is, for example, an electronic expansion valve that can adjust the aperture of a throttle, and controls the pressure of the refrigerant flowing into the outdoor heat exchanger 104 or the indoor heat exchanger 106 by adjusting the aperture. The indoor heat exchanger 106 exchanges heat between the indoor air and the refrigerant flowing inside the indoor heat exchanger 106. The indoor heat exchanger 106 functions as an evaporator or a condenser depending on the direction of refrigerant flow. The refrigeration cycle apparatus 200 may include an outdoor fan (not shown) that sends outdoor air to the outdoor heat exchanger 104, or may include an outdoor fan (not shown) that sends indoor air to the indoor heat exchanger 106.

[0081] [Operation of the refrigeration cycle apparatus 200] The following describes the operation of the refrigeration cycle apparatus 200 when the refrigeration cycle apparatus 200 is an air conditioner and the air conditioner is performing heating operation. During heating operation of the air conditioner, the flow path switching device 103 connects the pipes connected to the flow path switching device 103 to form a circuit on the solid line side in Figure 6.

[0082] The high-temperature, high-pressure refrigerant compressed by the compressor 1 flows into the indoor heat exchanger 106, where it condenses and liquefies, and then flows out of the indoor heat exchanger 106 and into the pressure reducing device 105, where it is throttled and becomes a low-temperature, low-pressure, two-phase gas-liquid refrigerant. The low-temperature, low-pressure, two-phase refrigerant throttled in the pressure reducing device 105 flows into the outdoor heat exchanger 104, where it evaporates and gasifies, and after flowing out of the outdoor heat exchanger 104, passes through the flow switching device 103 and returns to the compressor 1.

[0083] That is, when the refrigeration cycle device 200 is an air conditioner and the air conditioner is in heating operation, the refrigerant circulates through the refrigerant circuit 201 as shown by the solid arrows in Fig. 6. This circulation of the refrigerant causes heat exchange between the outside air and the refrigerant in the outdoor heat exchanger 104, which is an evaporator, and the refrigerant sent to the outdoor heat exchanger 104 absorbs heat, and the refrigerant that has absorbed heat is sent to the indoor heat exchanger 106, which is a condenser, where it exchanges heat with the indoor air and warms the indoor air.

[0084] The following describes the operation of the refrigeration cycle apparatus 200 when the refrigeration cycle apparatus 200 is an air conditioner and the air conditioner is in cooling operation. During cooling operation of the air conditioner, the flow path switching device 103 connects the pipes connected to the flow path switching device 103 to form a circuit on the dashed line side in Figure 6.

[0085] The high-temperature, high-pressure refrigerant compressed by the compressor 1 flows into the outdoor heat exchanger 104, where it condenses and liquefies, and after flowing out of the outdoor heat exchanger 104, flows into the pressure reducing device 105, where it is throttled and becomes a low-temperature, low-pressure, two-phase gas-liquid refrigerant. The refrigerant throttled in the pressure reducing device 105 and becomes a low-temperature, low-pressure, two-phase gas-liquid refrigerant flows into the indoor heat exchanger 106, where it evaporates and gasifies, and after flowing out of the indoor heat exchanger 106, it passes through the flow switching device 103 and returns to the compressor 1 again.

[0086] That is, when the refrigeration cycle apparatus 200 switches from heating operation to cooling operation, the indoor heat exchanger 106 switches from a condenser to an evaporator, and the outdoor heat exchanger 104 switches from an evaporator to a condenser. When the refrigeration cycle apparatus 200 is an air conditioner and the air conditioner is operating in cooling mode, the refrigerant circulates through the refrigerant circuit 201 as shown by the dashed arrows in Fig. 6. This circulation of the refrigerant causes heat exchange between the indoor air and the refrigerant in the indoor heat exchanger 106, which serves as an evaporator, and absorbs heat from the indoor air, i.e., cools the indoor air. The refrigerant that has absorbed heat is sent to the outdoor heat exchanger 104, which serves as a condenser, where it exchanges heat with the outdoor air and releases heat to the outdoor air.

[0087] The refrigerant flowing through the refrigerant circuit 201 may be, for example, R407C refrigerant, R410A refrigerant, R32 refrigerant, or R290 refrigerant. The refrigerant flowing through the refrigerant circuit 201 is not limited to the above refrigerants, and may be, for example, R454B refrigerant or R454C refrigerant. The refrigerant may be, for example, a single refrigerant selected from R1234yf, R1234ze, R32, or R290, a mixed refrigerant containing two or more of these, or a mixed refrigerant containing one of these with another refrigerant. The refrigerant may also be a mixed refrigerant containing R1132(E) or a mixed refrigerant containing R1123. In addition, a mixed refrigerant of R516A, R445A, R444A, R454C, R444B, R454A, R455A, R457A, R459B, R452B, R454B, R447B, R447A, R446A, and R459A may be used as the refrigerant.

[0088] [Operation and Effect of Compressor 1] In compressor 1, a frame-side suction passage 153, which is a through-hole that connects the outside of upper bearing 53, which is first frame 58a, with compression chamber 52a, is formed in upper bearing 53, which is first frame 58a. Frame-side suction passage 153 forms a cylindrical space extending radially inward from the outer peripheral surface of first frame 58a and has a horizontal hole 153b into which the tip of refrigerant suction pipe 7a, which penetrates from the outside of sealed container 2, is inserted. Frame-side suction passage 153 also has an oblique hole 153a, which forms a cylindrical space that obliquely extends from a radial inner end 153b1 of horizontal hole 153b toward compression chamber 52a. In compressor 1, the radial inner end 153b1 side of horizontal hole 153b in frame-side suction passage 153 is formed by only one inclined surface 153c defined by oblique hole 153a.

[0089] Therefore, in compressor 1, there is no right-angled surface, which is a surface along the axis of rotation shaft 51, on the radial inner end 153b1 side of lateral hole 153b, so that refrigerant can flow smoothly from lateral hole 153b to oblique hole 153a, and refrigerant can flow smoothly into compression mechanism 5. Therefore, compressor 1 can reduce pressure loss of gas refrigerant flowing into compressor 1 and improve performance. Furthermore, in compressor 1, radial inner end 153b1 side of lateral hole 153b is formed by only one inclined surface 153c constituted by oblique hole 153a, and oblique hole 153a can be formed by a single cutting process with a drill, so that frame-side suction path 153 can be easily formed.

[0090] The compressor 1 uses an R290 refrigerant, which reduces pressure loss compared to when an R32 refrigerant is used. R290 refrigerant is used at a higher rotation speed to achieve the same performance as an R32 refrigerant. Although increasing the rotation speed of the compressor 1 increases pressure loss, the shape of the frame-side intake passage 153 can reduce pressure loss, resulting in a greater reduction in pressure loss when using an R290 refrigerant than when using an R32 refrigerant.

[0091] In addition, the frame side intake path section 153 has flow path cross sections of the horizontal hole section 153b and the oblique hole section 153a formed in a perfect circular shape, and the diameter of the horizontal hole section 153b and the diameter of the oblique hole section 153a are configured to be the same size.

[0092] In the compressor 1, the cross-sectional shapes of the lateral hole 153b and the oblique hole 153a are perfectly circular, so the value of "cross-sectional area / perimeter" can be made smaller compared to holes with an elliptical cross-sectional shape, thereby minimizing refrigerant flow resistance. Therefore, the compressor 1 can further reduce refrigerant resistance and ensure a more optimal refrigerant flow compared to a compressor with an elliptical suction hole. Furthermore, because the lateral hole 153b and the oblique hole 153a have perfectly circular cross-sectional shapes and can be formed by cutting using only a drill, the upper bearing 53, which is the first frame 58a, can be manufactured at low cost.

[0093] Furthermore, in compressor 1, because the diameter of lateral hole 153b and the diameter of oblique hole 153a are the same, no step is formed at the intersection of lateral hole 153b and oblique hole 153a. Therefore, in compressor 1, the resistance of the refrigerant flowing from lateral hole 153b to oblique hole 153a can be reduced, allowing the refrigerant to flow more suitably, compared to a case in which a step is formed at the intersection of lateral hole 153b and oblique hole 153a.

[0094] In addition, the cylinder side intake path portion 52b forms a perfectly circular cylindrical space, and the portion facing the oblique hole portion 153a in the cylinder side intake path portion 52b in the axial direction is formed by an inclined surface 52b2 having the same diameter and the same inclination angle as the oblique hole portion 153a.

[0095] The compressor 1 can reduce the resistance of the refrigerant flowing from the oblique hole 153a to the cylinder-side suction path 52b, allowing the refrigerant to flow more smoothly, compared to a compressor without this configuration. Furthermore, because the cylinder-side suction path 52b forms a perfectly circular cylindrical space, the "cross-sectional area / perimeter" ratio can be made smaller than with an elliptical hole, minimizing the resistance to the refrigerant flow. Therefore, the compressor 1 can further reduce the resistance to the refrigerant and allow the refrigerant to flow more smoothly, compared to a compressor with a suction hole having an elliptical cross-sectional shape. Furthermore, because the cylinder-side suction path 52b is a hole that forms a perfectly circular cylindrical space, it can be formed by cutting using only a drill, allowing the cylinder 52 to be manufactured at low cost.

[0096] In addition, the compression mechanism 5 is configured so that the angle α between the horizontal hole axis L1, which is the axis of the horizontal hole portion 153b, and the oblique hole axis L2, which is the axis of the oblique hole portion 153a, is in the range of 110° or more and 150° or less.

[0097] In the compression mechanism 5, the frame-side suction passage portion 153 may be cut into the upper bearing 53 using a drill D so that the angle α between the horizontal hole axis L1 and the oblique hole axis L2 is 110°. In this case, by using a drill D with a cutting edge angle β of 140° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 153b and the oblique hole portion 153a.

[0098] Furthermore, in the compression mechanism 5, the frame-side suction passage portion 153 may be cut into the upper bearing 53 using a drill D so that the angle α between the horizontal hole axis L1 and the oblique hole axis L2 is 111° or more and 150° or less. Even in this case, by using a drill D with a cutting edge angle β of 140° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 153b and the oblique hole portion 153a.

[0099] Furthermore, in the compression mechanism 5, the frame-side suction passage portion 153 may be cut into the upper bearing 53 using a drill D so that the angle α between the horizontal hole axis L1 and the oblique hole axis L2 is 121° or more and 150° or less. Even in this case, by using a drill D with a cutting edge angle β of 118° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 153b and the oblique hole portion 153a.

[0100] The cutting edge angle of 140° is the cutting edge angle of a commonly used and commercially available drill. The compression mechanism 5 is configured so that the angle α between the horizontal hole axis L1 and the oblique hole axis L2 is in the range of 110° to 150°, which allows a drill having a commonly used cutting edge angle β to be used for cutting the frame-side suction passage portion 153. Therefore, compared to using a special drill that does not have a commonly used cutting edge angle for cutting the frame-side suction passage portion 153, the compressor 1 makes it easier to obtain cutting tools and reduces manufacturing costs.

[0101] The compression mechanism 5 is configured such that the angle α formed between the lateral hole axis L1 and the oblique hole axis L2 is any one of 110°, 115°, 120°, and 121°.

[0102] In the compression mechanism 5, the frame-side suction passage portion 153 may be cut into the upper bearing 53 using a drill D so that the angle α between the horizontal hole axis L1 and the oblique hole axis L2 is 110°. In this case, by using a drill D with a cutting edge angle β of 140° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 153b and the oblique hole portion 153a.

[0103] In the compression mechanism 5, the frame-side suction passage portion 153 may be cut into the upper bearing 53 using a drill D so that the angle α between the horizontal hole axis L1 and the oblique hole axis L2 is 115°. In this case, by using a drill D with a cutting edge angle β of 130° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 153b and the oblique hole portion 153a.

[0104] In the compression mechanism 5, the frame-side suction passage portion 153 may be cut into the upper bearing 53 using a drill D so that the angle α between the horizontal hole axis L1 and the oblique hole axis L2 is 120°. In this case, by using a drill D with a cutting edge angle β of 120° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 153b and the oblique hole portion 153a.

[0105] In the compression mechanism 5, the frame-side suction passage portion 153 may be cut into the upper bearing 53 using a drill D so that the angle α between the horizontal hole axis L1 and the oblique hole axis L2 is 121°. In this case, by using a drill D with a cutting edge angle β of 118° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 153b and the oblique hole portion 153a.

[0106] The cutting edge angles of 140°, 130°, 120°, and 118° are the cutting edge angles of commonly used and commercially available drills. The compression mechanism 5 is configured so that the angle α between the horizontal hole axis L1 and the oblique hole axis L2 is any one of 110°, 115°, 120°, and 121°. In this case, the compression mechanism 5 can use a drill having a commonly used cutting edge angle β when cutting the frame-side suction passage portion 153. Therefore, compared to using a special drill that does not have a commonly used cutting edge angle when cutting the frame-side suction passage portion 153, the compressor 1 can more easily obtain cutting tools and reduce manufacturing costs.

[0107] The refrigeration cycle apparatus 200 according to the first embodiment includes the compressor 1 according to the first embodiment. Therefore, the refrigeration cycle apparatus 200 can obtain the same effects as those of the compressor 1 according to the first embodiment.

[0108] Embodiment 2 FIG. 7 is a schematic longitudinal sectional view of a compressor 1 according to embodiment 2. FIG. 8 is a schematic longitudinal sectional view of a portion of the compression mechanism 5 of the compressor 1 according to embodiment 2. The compression mechanism 5 of embodiment 2 will be described using FIGS. 7 and 8. Note that parts having the same configuration as those in the compression mechanism 5 of FIGS. 1 to 6 are given the same reference numerals, and description thereof will be omitted. The compressor 1 according to embodiment 2 differs from embodiment 1 in the structure of the upper bearing 53 and the lower bearing 54. The following description will focus on the configuration of embodiment 2 that differs from embodiment 1, and configurations not described in embodiment 2 are the same as embodiment 1.

[0109] The compressor 1 according to the first embodiment is configured such that the frame-side suction passage 153 is provided in the upper bearing 53. In contrast, the compressor 1 according to the second embodiment is configured such that the frame-side suction passage 154 is provided in the lower bearing 54, rather than the frame-side suction passage 153 being provided in the upper bearing 53.

[0110] (Configuration of cylinder side suction path portion 52b1) The inner peripheral surface of the cylinder 52 is formed with a cylinder side suction path portion 52b1 communicating with the low pressure chamber 52f and a discharge port 52c (see Figure 2) communicating with the high pressure chamber 52g.

[0111] The cylinder 52 includes a cylinder-side suction passage 52b1 formed radially outward of the compression chamber 52a of the cylinder 52, and configured to allow refrigerant to flow from the oblique hole 154a to the compression chamber 52a. The cylinder-side suction passage 52b1 is connected to a frame-side suction passage 154 of the lower bearing 54, which will be described later, and is a through-hole through which refrigerant gas passes as it is drawn into the compression chamber 52a from outside the sealed container 2.

[0112] The cylinder side suction path portion 52b1 is formed to extend, for example, in the radial direction and the up-down direction in the cylinder 52. The cylinder side suction path portion 52b1 is inclined with respect to the axial direction of the rotary shaft 51 in a vertical cross section taken along the axial direction and the radial direction of the rotary shaft 51.

[0113] The cylinder-side suction path 52b1 defines a perfectly circular cylindrical space, and the portion of the cylinder-side suction path 52b1 facing the oblique hole 154a in the axial direction of the rotating shaft 51 is formed with an inclined surface 52b3 having the same diameter and inclination angle as the oblique hole 154a. In a vertical cross section taken along the axial and radial directions of the rotating shaft 51, the inclined surface 52b3 is inclined so as to face the radially inner side and the axially downward side of the rotating shaft 51.

[0114] Cylinder-side suction path 52b1 and oblique hole 154a are formed with holes of the same diameter at least at the connection portion between cylinder-side suction path 52b1 and oblique hole 154a. Furthermore, cylinder-side suction path 52b1 and oblique hole 154a are formed so as to be inclined at the same inclination angle with respect to rotation shaft 51 at least at the connection portion between cylinder-side suction path 52b1 and oblique hole 154a in a vertical cross section along the axial and radial directions of rotation shaft 51.

[0115] The cylinder-side suction path 52b1 is formed so that the cross section of the flow path perpendicular to the flow path direction is a perfect circle. Note that the cross section of the flow path of the cylinder-side suction path 52b1 is preferably a perfect circle, but is not limited to a perfect circle. The cross section of the flow path of the cylinder-side suction path 52b1 may have various shapes, such as a perfect circle or an ellipse.

[0116] The cylinder-side suction path 52b1 is inclined upward from the outer periphery toward the inner periphery in the radial direction of the cylinder 52. The cylinder-side suction path 52b1 is inclined toward the compression chamber 52a of the cylinder 52 from the outer periphery toward the inner periphery in the radial direction of the cylinder 52. The cylinder-side suction path 52b1 is inclined from the outer periphery toward the inner periphery in the radial direction of the cylinder 52 from the bottom toward the top in the axial direction of the rotating shaft 51.

[0117] One end of the cylinder-side intake path portion 52b1 of the cylinder 52 communicates with a frame-side intake path portion 154 of the lower bearing 54 (described later), and the other end communicates with the compression chamber 52a of the cylinder 52.

[0118] (Configuration of frame-side suction path portion 154) The lower bearing 54 is arranged on one axial end face of the cylinder 52 in the axial direction of the rotating shaft 51, and its outer circumferential surface is fixed to the inner circumferential surface of the sealed container 2. The upper bearing 53 is arranged on the other axial end face of the cylinder 52. The lower bearing 54 may be fixed at multiple points to the inner circumferential surface of the body portion 21 of the sealed container 2 by arc spot welding. In this case, the upper bearing 53 is fixed to the upper surface side of the cylinder 52. The lower bearing 54 is a first frame 58a of the compressor 1, and the upper bearing 53 is a second frame 58b of the compressor 1.

[0119] The lower bearing 54, which is the first frame 58a, has a frame-side suction passage 154, which is a through-hole that connects the outside of the lower bearing 54, which is the first frame 58a, with the compression chamber 52a. The frame-side suction passage 154 is a refrigerant suction hole in the compression mechanism 5. The frame-side suction passage 154 is formed in one of the two bearings 58.

[0120] In the second embodiment, the frame-side intake passage 154 is formed in the lower bearing 54, which is the first frame 58a. The frame-side intake passage 154 extends inward from the radially outer end of the lower closing portion 54a of the lower bearing 54 and penetrates obliquely at the radially inner portion thereof toward the upper end face of the lower bearing 54. The upper end face of the lower bearing 54 is the end face facing the cylinder 52.

[0121] When power is supplied to the electric motor 4 from the outside through the terminal 6a, the rotating shaft 51 fixed to the rotor 42 rotates around its axis, and the refrigerant is sucked from the refrigeration cycle into the low-pressure chamber 52f through the refrigerant suction pipe 7a and the frame-side suction path portion 154 of the lower bearing 54.

[0122] Frame-side suction path 154 has horizontal hole 154b, which forms a perfectly circular cylindrical space extending radially inward from the outer circumferential surface of lower bearing 54, and oblique hole 154a, which forms a perfectly circular cylindrical space extending obliquely from radial inner end 154b1 of horizontal hole 154b toward compression chamber 52a. Frame-side suction path 154 is such that horizontal hole 154b and oblique hole 154a intersect on the radial inner end 154b1 side of horizontal hole 154b.

[0123] The horizontal hole 154b and the oblique hole 154a are formed so that the cross section perpendicular to the flow path direction is a perfect circle. Note that the flow path cross sections of the horizontal hole 154b and the oblique hole 154a are preferably, but not limited to, a perfect circle. The flow path cross sections of the horizontal hole 154b and the oblique hole 154a include various shapes, such as a perfect circle or an ellipse.

[0124] The diameter of the horizontal hole 154b and the diameter of the oblique hole 154a are the same. The diameters of the horizontal hole 154b and the oblique hole 154a of the frame-side intake path 154 are, for example, 7 mm, 9.8 mm, or 16 mm.

[0125] The horizontal hole 154b is formed to extend radially in the lower closing portion 54a of the lower bearing 54. The outer peripheral end of the horizontal hole 154b forms an opening in the outer peripheral surface of the lower closing portion 54a of the lower bearing 54. The tip of the refrigerant suction pipe 7a, which penetrates from the outside of the sealed container 2, is inserted into the horizontal hole 154b. The tip of the refrigerant suction pipe 7a protrudes into the sealed container 2 and is inserted and connected to the horizontal hole 154b of the frame-side suction path portion 154 provided in the lower bearing 54. The outer peripheral end of the horizontal hole 154b is connected to the tip of the refrigerant suction pipe 7a, and the internal space of the horizontal hole 154b and the internal space of the refrigerant suction pipe 7a are in communication.

[0126] The inner end of lateral hole 154b is connected to oblique hole 154a. The radially inner end 154b1 of lateral hole 154b is formed by a single inclined surface 154c defined by oblique hole 154a. Inclined surface 154c faces the tip of refrigerant suction pipe 7a at the intersection with lateral hole 154b in the radial direction of cylinder 52.

[0127] The oblique hole portion 154a is formed to extend radially and vertically in the lower closed portion 54a of the lower bearing 54. The oblique hole portion 154a is inclined with respect to the axial direction of the rotating shaft 51 in a vertical cross section taken along the axial and radial directions of the rotating shaft 51.

[0128] The oblique hole portion 154a is inclined upward from the outer circumferential side toward the inner circumferential side in the radial direction in the lower closed portion 54a of the lower bearing 54. The oblique hole portion 154a is inclined toward the cylinder 52 from the outer circumferential side toward the inner circumferential side in the radial direction in the lower closed portion 54a of the lower bearing 54. The oblique hole portion 154a is inclined from the outer circumferential side toward the inner circumferential side in the radial direction in the axial direction of the rotating shaft 51 from the bottom to the top.

[0129] Oblique hole portion 154a has an inclined surface 154c at a portion facing horizontal hole portion 154b in a vertical cross section taken along the axial and radial directions of rotating shaft 51. Oblique hole portion 154a has an inner wall formed by a single inclined surface 154c in a vertical cross section taken along the axial and radial directions of rotating shaft 51. In other words, oblique hole portion 154a does not have an inner wall formed by a plurality of inclined surfaces at different angles in a vertical cross section taken along the axial and radial directions of rotating shaft 51.

[0130] The inclined surface 154c is inclined upward from the outer circumferential side toward the inner circumferential side in the radial direction in a vertical cross section taken along the axial and radial directions of the rotating shaft 51. The inclined surface 154c is inclined from the outer circumferential side toward the inner circumferential side in the radial direction as it moves from the bottom to the top in the axial direction of the rotating shaft 51. The inclined surface 154c is inclined so as to face the outer circumferential side in the radial direction and toward the upper side in the axial direction of the rotating shaft 51 in a vertical cross section taken along the axial and radial directions of the rotating shaft 51. The inclined surface 154c faces the inclined surface 52b3 of the cylinder 52 in the axial direction of the rotating shaft 51.

[0131] The oblique hole 154a communicates with the cylinder-side suction path 52b1 of the cylinder 52, which is formed in communication with the compression chamber 52a. One end of the oblique hole 154a communicates with the horizontal hole 154b, and the other end communicates with the cylinder-side suction path 52b1. As a result, the frame-side suction path 154, which is formed in the lower blocking portion 54a of the lower bearing 54, communicates with the compression chamber 52a of the cylinder 52 via the cylinder-side suction path 52b1 of the cylinder 52.

[0132] 9 is an explanatory diagram showing the angle γ formed between the lateral hole 154b and the oblique hole 154a in the compressor 1 according to the second embodiment. As shown in FIG. 9 , the compressor 1 is configured such that the angle γ formed between the lateral hole axis L3 of the lateral hole 154b and the oblique hole axis L4 of the oblique hole 154a is 120° in a vertical cross section taken along the axial and radial directions of the rotating shaft 51. The angle γ is the angle formed between the lateral hole axis L3 of the lateral hole 154b and the oblique hole axis L4 of the oblique hole 154a in a vertical cross section taken along the axial and radial directions of the rotating shaft 51, and is an angle directed radially outward and axially upward.

[0133] Figure 10 is a cross-sectional view of the frame-side suction passage 154 of the lower bearing 54 used in the compressor 1 according to embodiment 2. Using Figure 10, a case will be described in which the frame-side suction passage 154 is cut with a drill D into the lower bearing 54 so that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 120°. The angle β of the cutting edge D1 of the drill D used to form the frame-side suction passage 154 is 120°.

[0134] The lateral hole portion 154b is formed by advancing the drill D from the outer circumferential side toward the inner circumferential side in the radial direction of the lower bearing 54. The oblique hole portion 154a is formed by advancing the drill D obliquely from the upper side of the lower bearing 54 so that the angle γ with respect to the lateral hole portion 154b is 120°.

[0135] 10 , when forming the frame-side intake passage portion 154, by using a drill D having a cutting edge D1 with an angle β of 120°, it is possible to prevent a step from occurring at the intersection of the lateral hole portion 154b and the oblique hole portion 154a of the lower bearing 54. Furthermore, because the lateral hole portion 154b and the oblique hole portion 154a are holes that form cylindrical spaces that are perfect circles, they can be formed by cutting using only the same drill D. This allows the lower bearing 54 to be manufactured at a lower cost than when different types of drills are used.

[0136] 9 and 10 , the lower bearing 54 is configured with a horizontal hole portion 154b forming a perfectly circular cylindrical space relative to the lower bearing 54 and an oblique hole portion 154a forming a perfectly circular cylindrical space such that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 120°. However, the lower bearing 54 is not limited to a configuration in which the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 120°. The compression mechanism 5 is configured such that the angle γ between the horizontal hole axis L3, which is the axis of the horizontal hole portion 154b, and the oblique hole axis L4, which is the axis of the oblique hole portion 154a, is in the range of 110° to 150°. In the compression mechanism 5, the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is, for example, any one of 110°, 115°, 120°, and 121°.

[0137] The lower bearing 54 may be configured with a horizontal hole portion 154b that forms a perfect circular cylindrical space relative to the lower bearing 54 and an oblique hole portion 154a that forms a perfect circular cylindrical space, such that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 110°. In this configuration, when cutting the horizontal hole portion 154b that forms a perfect circular cylindrical space relative to the lower bearing 54 and the oblique hole portion 154a that forms a perfect circular cylindrical space relative to the lower bearing 54 with a drill D, a drill D whose cutting edge D1 has an angle β of 140° is used. By using a drill D whose cutting edge D1 has an angle β of 140° to cut the frame-side intake passage portion 154 of the lower bearing 54, it is possible to prevent a step from occurring at the intersection of the horizontal hole portion 154b and the oblique hole portion 154a.

[0138] The lower bearing 54 may be configured with a horizontal hole portion 154b that forms a perfect circular cylindrical space relative to the lower bearing 54 and an oblique hole portion 154a that forms a perfect circular cylindrical space, so that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 115°. In this configuration, when cutting the horizontal hole portion 154b that forms a perfect circular cylindrical space relative to the lower bearing 54 and the oblique hole portion 154a that forms a perfect circular cylindrical space relative to the lower bearing 54 with a drill D, a drill D having a cutting edge D1 with an angle β of 130° is used. By using a drill D having a cutting edge D1 with an angle β of 130° to cut the frame-side intake passage portion 154 of the lower bearing 54, it is possible to prevent a step from occurring at the intersection of the horizontal hole portion 154b and the oblique hole portion 154a.

[0139] The lower bearing 54 may be configured with a horizontal hole portion 154b that forms a perfect circular cylindrical space relative to the lower bearing 54 and an oblique hole portion 154a that forms a perfect circular cylindrical space, so that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 121°. In this configuration, when cutting the horizontal hole portion 154b that forms a perfect circular cylindrical space relative to the lower bearing 54 and the oblique hole portion 154a that forms a perfect circular cylindrical space relative to the lower bearing 54 with a drill D, a drill D having an angle β of 118° at its cutting edge D1 is used. By using a drill D having an angle β of 118° at its cutting edge D1 to cut the frame-side intake passage portion 154 of the lower bearing 54, it is possible to prevent a step from occurring at the intersection of the horizontal hole portion 154b and the oblique hole portion 154a.

[0140] [Operation and Effect of Compressor 1] In compressor 1, a frame-side suction passage 154, which is a through-hole that connects the outside of lower bearing 54, which is first frame 58a, with compression chamber 52a, is formed in lower bearing 54, which is first frame 58a. Frame-side suction passage 154 forms a cylindrical space extending radially inward from the outer peripheral surface of first frame 58a and has a horizontal hole 154b into which the tip of refrigerant suction pipe 7a, which penetrates from the outside of sealed container 2, is inserted. Frame-side suction passage 154 also has an oblique hole 154a, which forms a cylindrical space that obliquely extends from a radial inner end 154b1 of horizontal hole 154b toward compression chamber 52a. In compressor 1, the radial inner end 154b1 side of horizontal hole 154b in frame-side suction passage 154 is formed by only one inclined surface 154c defined by oblique hole 154a.

[0141] Therefore, in compressor 1, there is no right-angled surface, which is a surface along the axis of rotation shaft 51, on the radial inner end 154b1 side of lateral hole 154b, so that refrigerant can flow smoothly from lateral hole 154b to oblique hole 154a, and refrigerant can flow smoothly into compression mechanism 5. Therefore, compressor 1 can reduce pressure loss of gas refrigerant flowing into compressor 1 and improve performance. Furthermore, in compressor 1, radial inner end 154b1 side of lateral hole 154b is formed by only one inclined surface 154c formed by oblique hole 154a, and oblique hole 154a can be formed by a single drill cutting process, so that frame-side suction path 154 can be easily formed.

[0142] As described above in the first embodiment, increasing the rotation speed of the compressor 1 increases the pressure loss. However, the pressure loss can be reduced by changing the shape of the frame-side intake passage portion 154, and therefore, the pressure loss reduction effect can be greater when using R290 refrigerant than when using R32 refrigerant.

[0143] In addition, the frame side intake path section 154 has flow path cross sections of the horizontal hole section 154b and the oblique hole section 154a formed in a perfect circular shape, and the diameter of the horizontal hole section 154b and the diameter of the oblique hole section 154a are configured to be the same size.

[0144] In the compressor 1, the cross-sectional shapes of the lateral hole 154b and the oblique hole 154a are perfectly circular, so the value of "cross-sectional area / perimeter" can be made smaller compared to holes with an elliptical cross-sectional shape, thereby minimizing refrigerant flow resistance. Therefore, the compressor 1 can further reduce refrigerant resistance and ensure a more optimal refrigerant flow compared to a compressor with an elliptical suction hole. Furthermore, because the lateral hole 154b and the oblique hole 154a have perfectly circular cross-sectional shapes and can be formed by cutting using only a drill, the lower bearing 54, which is the first frame 58a, can be manufactured at low cost.

[0145] Furthermore, in compressor 1, because the diameter of lateral hole 154b and the diameter of oblique hole 154a are the same, no step is formed at the intersection of lateral hole 154b and oblique hole 154a. Therefore, in compressor 1, the resistance of the refrigerant flowing from lateral hole 154b to oblique hole 154a can be reduced, allowing the refrigerant to flow more suitably, compared to a case in which a step is formed at the intersection of lateral hole 154b and oblique hole 154a.

[0146] In addition, the compression mechanism 5 is configured so that the angle γ between the horizontal hole axis L3, which is the axis of the horizontal hole portion 154b, and the oblique hole axis L4, which is the axis of the oblique hole portion 154a, is in the range of 110° or more and 150° or less.

[0147] In the compression mechanism 5, the frame-side suction passage portion 154 may be cut into the lower bearing 54 using a drill D so that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 110°. In this case, by using a drill D with a cutting edge angle β of 140° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 154b and the oblique hole portion 154a.

[0148] Furthermore, in the compression mechanism 5, the frame-side suction passage portion 154 may be cut into the lower bearing 54 using a drill D so that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 111° or more and 150° or less. Even in this case, by using a drill D with a cutting edge angle β of 140° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 154b and the oblique hole portion 154a.

[0149] Furthermore, in the compression mechanism 5, the frame-side suction passage portion 154 may be cut into the lower bearing 54 using a drill D so that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 121° or more and 150° or less. Even in this case, by using a drill D with a cutting edge angle β of 118° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 154b and the oblique hole portion 154a.

[0150] The cutting edge angle of 140° is the cutting edge angle of a commonly used and commercially available drill. The compression mechanism 5 is configured so that the angle β between the horizontal hole axis L3 and the oblique hole axis L4 is in the range of 110° to 150°, which allows a drill having a commonly used cutting edge angle β to be used for cutting the frame-side intake path portion 154. Therefore, compared to using a special drill that does not have a commonly used cutting edge angle for cutting the frame-side intake path portion 154, the compressor 1 makes it easier to obtain cutting tools and reduces manufacturing costs.

[0151] The compression mechanism 5 is configured such that the angle γ formed between the lateral hole axis L3 and the oblique hole axis L4 is any one of 110°, 115°, 120°, and 121°.

[0152] In the compression mechanism 5, the frame-side suction passage portion 154 may be cut into the lower bearing 54 using a drill D so that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 110°. In this case, by using a drill D with a cutting edge angle β of 140° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 154b and the oblique hole portion 154a.

[0153] In the compression mechanism 5, the frame-side suction passage portion 154 may be cut into the lower bearing 54 using a drill D so that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 115°. In this case, by using a drill D with a cutting edge angle β of 130° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 154b and the oblique hole portion 154a.

[0154] In the compression mechanism 5, the frame-side suction passage portion 154 may be cut into the lower bearing 54 using a drill D so that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 120°. In this case, by using a drill D with a cutting edge angle β of 120° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 154b and the oblique hole portion 154a.

[0155] In the compression mechanism 5, the frame-side suction passage portion 154 may be cut into the lower bearing 54 using a drill D so that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is 121°. In this case, by using a drill D with a cutting edge angle β of 118° in the cutting process, the compression mechanism 5 can prevent a step from occurring at the intersection between the horizontal hole portion 154b and the oblique hole portion 154a.

[0156] The cutting edge angles of 140°, 130°, 120°, and 118° are the cutting edge angles of commonly used and commercially available drills. The compression mechanism 5 is configured so that the angle γ between the horizontal hole axis L3 and the oblique hole axis L4 is any one of 110°, 115°, 120°, and 121°. In this case, the compression mechanism 5 can use a drill having a commonly used cutting edge angle β to cut the frame-side suction passage 154. Therefore, compared to using a special drill that does not have a commonly used cutting edge angle to cut the frame-side suction passage 154, the compressor 1 can more easily obtain cutting tools and reduce manufacturing costs.

[0157] In addition, the cylinder side intake path portion 52b1 forms a perfectly circular cylindrical space, and the portion facing the oblique hole portion 154a in the cylinder side intake path portion 52b1 in the axial direction is formed by an inclined surface 52b3 having the same diameter and the same inclination angle as the oblique hole portion 154a.

[0158] The compressor 1 can reduce the resistance of the refrigerant flowing from the oblique hole 154a to the cylinder-side suction path 52b1, allowing for a smoother flow of the refrigerant, compared to a compressor without this configuration. Furthermore, because the cylinder-side suction path 52b1 forms a perfectly circular cylindrical space, the "cross-sectional area / perimeter" ratio can be made smaller compared to an elliptical hole, minimizing the resistance to the refrigerant flow. Therefore, the compressor 1 can further reduce the resistance of the refrigerant and allow for a more suitable flow of the refrigerant, compared to a compressor with a suction hole having an elliptical cross-sectional shape. Furthermore, because the cylinder-side suction path 52b1 is a hole that forms a perfectly circular cylindrical space, it can be formed by cutting using only a drill, allowing the cylinder 52 to be manufactured at low cost.

[0159] The refrigeration cycle apparatus 200 according to the second embodiment is similar in configuration and operation to the refrigeration cycle apparatus 200 according to the first embodiment shown in Fig. 6. The refrigeration cycle apparatus 200 according to the second embodiment is equipped with the compressor 1 according to the second embodiment. Therefore, the refrigeration cycle apparatus 200 can obtain the same effects as the compressor 1 according to the second embodiment.

[0160] The configurations shown in the above embodiments are merely examples, and may be combined with other known technologies, and parts of the configurations may be omitted or modified without departing from the spirit of the invention.

[0161] REFERENCE SIGNS LIST 1 Compressor, 2 Sealed container, 3 Base, 4 Motor, 5 Compression mechanism, 6a Terminal, 6b Lead wire, 7a Refrigerant suction pipe, 7b Refrigerant discharge pipe, 21 Body, 22 Upper cover, 23 Lower cover, 41 Stator, 42 Rotor, 51 Rotating shaft, 51a Eccentric portion, 51b Main shaft, 51c Countershaft, 52 Cylinder, 52a Compression chamber, 52b Cylinder side suction path portion, 52b1 Cylinder side suction path portion, 52b2 Inclined surface, 52b3 Inclined surface, 52c Discharge port, 52d Vane groove, 52e Back pressure chamber, 52f Low pressure chamber, 52g High pressure chamber, 52h Inner peripheral wall, 53 Upper bearing, 53a Upper blocking portion, 53b Upper opening, 54 Lower bearing, 54a Lower blocking portion, 54b Lower opening, 55 rolling piston, 55a outer peripheral wall, 56 vane, 57 spring, 58 bearing, 58a first frame, 58b second frame, 61 discharge muffler, 101 suction muffler, 103 flow path switching device, 104 outdoor heat exchanger, 105 pressure reducing device, 106 indoor heat exchanger, 153 frame side suction path portion, 153a oblique hole portion, 153b horizontal hole portion, 153b1 radial inner end, 153c inclined surface, 154 frame side suction path portion, 154a oblique hole portion, 154b horizontal hole portion, 154b1 radial inner end, 154c inclined surface, 200 refrigeration cycle device, 201 refrigerant circuit, D drill, D1 cutting edge, L1 horizontal hole axis, L2 hole axis, L3 horizontal hole axis, L4 Hole axis, α angle, β angle, γ angle.

Claims

1. A rotating shaft, a compression mechanism that compresses a refrigerant by the rotation of the rotating shaft, and a sealed container that houses the rotating shaft and the compression mechanism, wherein the compression mechanism has a compression chamber for compressing the refrigerant therein, and a cylinder that is a cylindrical member, a first frame that is disposed on one end surface of the cylinder in the axial direction of the rotating shaft and whose outer peripheral surface is fixed to the inner peripheral surface of the sealed container, and a second frame that is disposed on the other end surface of the cylinder in the axial direction, wherein the first frame is formed with a frame-side suction passage portion that is a through-hole communicating the outside of the first frame and the compression chamber, the frame-side suction passage portion forms a cylindrical space extending radially inward from the outer peripheral surface of the first frame, and has a lateral hole portion into which the tip of a refrigerant suction pipe penetrating from the outside of the sealed container is inserted, and an inclined hole portion that forms a cylindrical space extending obliquely from the radially inner end of the lateral hole portion toward the compression chamber, wherein the radially inner end side of the lateral hole portion is formed only by one inclined surface formed by the inclined hole portion, the frame-side suction passage portion is formed such that the flow path cross-sections of the lateral hole portion and the inclined hole portion are circular, and the compression machine is configured such that the diameter of the lateral hole portion and the diameter of the inclined hole portion are the same size.

2. The compression mechanism is configured such that the angle formed by the lateral hole axis that is the axis of the lateral hole portion and the inclined hole axis that is the axis of the inclined hole portion is in the range of 110° or more and 150° or less. The compression machine according to Claim 1.

3. The compression mechanism is configured such that the angle formed by the lateral hole axis and the inclined hole axis is any one of the angles of 110°, 115°, 120°, and 121°. The compression machine according to Claim 2.

4. The cylinder is formed radially outside the compression chamber of the cylinder, and includes a cylinder-side suction passage portion that allows the refrigerant to flow from the inclined hole portion to the compression chamber, the cylinder-side suction passage portion forms a cylindrical space with a true circle, and in the axial direction, the portion of the cylinder-side suction passage portion that faces the inclined hole is formed by an inclined surface having the same diameter and the same inclination angle as the inclined hole portion. The compression machine according to any one of Claims 1 to 3. **Claim 5**: The refrigerant is any one of single refrigerants of R1234yf, R1234ze, R32, and R290, or a mixed refrigerant of any two or more of these, or a mixed refrigerant of any one of these and another refrigerant, or a mixed refrigerant containing R1132(E), or a mixed refrigerant containing R1123, and is the compressor according to any one of claims 1 to 3. **Claim 6**: The refrigerant is a single refrigerant of R290, or a mixed refrigerant of R290 and another refrigerant, and is the compressor according to claim 5. **Claim 7** A compressor according to any one of claims 1 to 3, an outdoor heat exchanger that performs heat exchange between outdoor air and the refrigerant flowing through the interior, a pressure reducing device that reduces the pressure of the refrigerant flowing through the interior, an indoor heat exchanger that performs heat exchange between indoor air and the refrigerant flowing through the interior, and a refrigeration cycle device provided with these.