Rotary compressor and refrigeration device

Abstract

To suppress generation of bubbles in oil stored in a bottom part of a casing.SOLUTION: The oil discharged from the oil discharge passage (52) of the housing (50) and then flowing toward the bottom of the casing (20) passes through the oil return passage (35). A first member (80) is disposed below the motor (30). The first member (80) includes an oil receiving portion (81) and an oil outlet portion (82). The oil receiving portion (81) receives the oil that has passed through the oil return passage (35). The oil outlet portion (82) allows the oil received by the oil receiving portion (81) to flow out toward the bottom of the casing (20).SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a rotary compressor and a refrigeration device. [Background technology]

[0002] Patent Document 1 discloses a high-pressure dome type rotary compressor in which high-pressure refrigerant compressed by a compression mechanism is discharged into a casing, creating high pressure inside the casing.

[0003] In the rotary compressor of Patent Document 1, oil is pumped up from an oil reservoir at the bottom of the casing, discharged through an oil discharge passage in the housing, then discharged into a first space below the motor and returned to the oil reservoir. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-005060 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if the oil that has been discharged from the oil drain passage flows forcefully down toward the oil reservoir at the bottom of the casing, the oil surface in the oil reservoir will be disturbed, causing air bubbles to form in the oil, which may deteriorate the lubricity of the oil.

[0006] The object of the present disclosure is to suppress the formation of air bubbles in the oil stored at the bottom of the casing. [Means for solving the problem]

[0007] A first aspect of the present disclosure is a rotary compressor including: a casing (20) having an oil reservoir (21) at its bottom; a compression mechanism (40) accommodated in the casing (20); a drive shaft (11) that rotationally drives the compression mechanism (40); and a motor (30) that is disposed below the compression mechanism (40) and rotates the drive shaft (11). The rotary compressor further includes a housing (50) disposed between the compression mechanism (40) and the motor (30); and a first member (80) disposed below the motor (30). The drive shaft (11) is provided with an oil supply passage (16) that draws up oil from the oil reservoir (21), and the housing (50) includes an oil supply passage (16) that draws up oil from the oil reservoir (21). The motor (30) is provided with an oil return passage (35) that penetrates in the axial direction between the outer peripheral surface of the motor (30) and the inner peripheral surface of the casing (20) and passes oil that is discharged from the oil drain passage (52) and heads toward the bottom of the casing (20). The first member (80) has an oil receiving portion (81) that receives the oil that has passed through the oil return passage (35) and an oil outflow portion (82) that causes the oil received in the oil receiving portion (81) to flow toward the bottom of the casing (20).

[0008] In the first aspect, the oil that has passed through the oil return passage (35) is temporarily received in the oil receiving portion (81) of the first member (80) to reduce the oil discharge speed, and then the oil is allowed to flow out from the oil outlet portion (82), thereby allowing the oil to be slowly returned to the oil reservoir (21) at the bottom of the casing (20). This reduces the risk of air bubbles being generated in the oil due to disturbances in the oil surface in the oil reservoir (21), which could deteriorate the lubricity of the oil.

[0009] In a second aspect of the present disclosure, in the rotary compressor of the first aspect, the oil outflow portion (82) is formed by a through hole (85) that opens at a position different from the oil receiving portion (81) in the first member (80).

[0010] In the second embodiment, the oil received in the oil receiver (81) can be returned to the oil reservoir (21) at the bottom of the casing (20) through the through-hole (85) formed in the first member (80).

[0011] In a third aspect of the present disclosure, in the rotary compressor of the first aspect, the oil outflow portion (82) is formed by an inclined portion (86) that extends obliquely downward at a position different from the oil receiving portion (81) in the first member (80).

[0012] In the third aspect, the oil received in the oil receiver (81) can be returned to the oil reservoir (21) at the bottom of the casing (20) via the inclined portion (86) formed in the first member (80).

[0013] In a fourth aspect of the present disclosure, in the rotary compressor of the first aspect, the oil outflow portion (82) is formed by a notch (87) formed by cutting out a part of the outer circumferential edge of the first member (80) at a position different from the oil receiving portion (81) in the first member (80).

[0014] In the fourth aspect, the oil received in the oil receiver (81) can be returned to the oil reservoir (21) at the bottom of the casing (20) through the cutout (87) formed in the first member (80).

[0015] A fifth aspect of the present disclosure is a rotary compressor according to any one of the first to fourth aspects, further comprising a second member (90) disposed between the motor (30) and the first member (80) and covering the upper side of the first member (80), wherein the second member (90) has a communication passage (91) that opens at a position communicating with the oil return passage (35) and the oil receiving portion (81) as viewed in the axial direction of the casing (20).

[0016] In the fifth aspect, the second member (90) is disposed between the motor (30) and the first member (80) to separate a gas space (36) above the second member (90), in which the gas refrigerant flows, from an oil space (37), in which the oil flows between the second member (90) and the first member (80), thereby making it possible to prevent oil from rising.

[0017] A sixth aspect of the present disclosure is the rotary compressor of any one of the first to fourth aspects, wherein the oil outlet (82) is provided at a position spaced apart from the oil receiving portion (81) in the circumferential direction of the casing (20).

[0018] In the sixth aspect, the oil that flows in the circumferential direction of the casing (20) after being received in the oil receiving portion (81) can be made to flow out from the oil outlet portion (82).

[0019] A seventh aspect of the present disclosure is the rotary compressor of the sixth aspect, wherein the oil outflow portion (82) is provided downstream of the oil receiving portion (81) in the air flow that flows over the upper surface of the first member (80) in the circumferential direction of the casing (20).

[0020] In the seventh aspect, the oil flows more easily from the oil receiver (81) toward the oil outlet (82) due to the airflow that flows over the upper surface of the first member (80) in the circumferential direction of the casing (20).

[0021] An eighth aspect of the present disclosure is a refrigeration system including a rotary compressor (10) according to any one of the first to seventh aspects and a refrigerant circuit (1a) through which a refrigerant compressed by the rotary compressor (10) flows.

[0022] In an eighth aspect, a refrigeration system can be provided, which includes a rotary compressor (10) and a refrigerant circuit (1a). [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a refrigerant circuit diagram showing the configuration of the refrigeration device of the first embodiment. [Figure 2] FIG. 2 is a vertical cross-sectional view showing the configuration of the rotary compressor. [Figure 3] FIG. 3 is a perspective view illustrating the flow of oil during the oil return operation. [Figure 4] FIG. 4 is a perspective view showing the configuration of the first oil separation plate. [Figure 5]FIG. 5 is a cross-sectional view showing the configuration of the first oil separation plate. [Figure 6] FIG. 6 is a cross-sectional view showing the configuration of the second oil separation plate. [Figure 7] FIG. 7 is a perspective view showing the configuration of the first oil separation plate according to the second embodiment. [Figure 8] FIG. 8 is a perspective view showing the configuration of the first oil separation plate according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0024] First Embodiment As shown in Fig. 1, the rotary compressor (10) is provided in a refrigeration system (1). The refrigeration system (1) has a refrigerant circuit (1a) filled with a refrigerant. The refrigerant circuit (1a) has the rotary compressor (10), a radiator (3), a pressure reduction mechanism (4), and an evaporator (5). The pressure reduction mechanism (4) is, for example, an expansion valve. The refrigerant circuit (1a) performs a vapor compression refrigeration cycle.

[0025] The refrigeration system (1) is an air conditioner. The air conditioner may be a cooling-only unit, a heating-only unit, or an air conditioner that switches between cooling and heating. In this case, the air conditioner has a switching mechanism (e.g., a four-way switching valve) that switches the refrigerant circulation direction. The refrigeration system (1) may be a water heater, a chiller unit, a cooling device that cools the air inside a storage unit, or the like. A cooling device cools the air inside a refrigerator, a freezer, a container, or the like.

[0026] As shown in Fig. 2, the rotary compressor (10) includes a casing (20), a motor (30), and a compression mechanism (40). The casing (20) is formed in a vertically elongated cylindrical shape and is configured as a sealed dome. The casing (20) accommodates the motor (30) and the compression mechanism (40). The motor (30) is disposed below the compression mechanism (40) and drives the compression mechanism (40) to rotate.

[0027] The motor (30) has a stator (31) and a rotor (32). The stator (31) is fixed to the inner peripheral surface of the casing (20). An oil return passage (35) that passes through the motor (30) in the axial direction is provided between the outer peripheral surface of the stator (31) and the inner peripheral surface of the casing (20).

[0028] Specifically, core cut portions (33) are formed continuously in the vertical direction on the outer peripheral surface of the stator (31). A plurality of core cut portions (33) are formed at intervals in the circumferential direction. One of the plurality of core cut portions (33) is used as an oil return passage (35) that returns oil discharged from an oil discharge passage (52) of the housing (50), which will be described later, to the oil reservoir (21).

[0029] The rotor (32) is disposed inside the stator (31). The drive shaft (11) passes through the rotor (32). The rotor (32) is fixed to the drive shaft (11).

[0030] An oil reservoir (21) is provided at the bottom of the casing (20). Oil is stored in the oil reservoir (21). A suction pipe (12) is connected to the top of the casing (20). A discharge pipe (13) is connected to the body of the casing (20).

[0031] A housing (50) is fixed to the casing (20). The housing (50) is disposed above the motor (30). The compression mechanism (40) is disposed above the housing (50). The inlet end of the discharge pipe (13) is located between the motor (30) and the housing (50).

[0032] The housing 50 has a recess 53 formed therein. The recess 53 is formed by recessing a portion of the upper surface of the housing 50. An upper bearing 51 is provided below the recess 53.

[0033] The drive shaft (11) extends vertically along the axis of the casing (20). The drive shaft (11) has a main shaft portion (14) and an eccentric portion (15). The eccentric portion (15) is provided at the upper end of the main shaft portion (14).

[0034] An upper portion of the main shaft portion (14) passes through the housing (50) and is rotatably supported by an upper bearing (51) of the housing (50). A lower portion of the main shaft portion (14) is rotatably supported by a lower bearing (26).

[0035] The lower bearing (26) is provided in a bearing body (27). The bearing body (27) is formed in a cylindrical shape extending in the vertical direction. The lower bearing (26) rotatably supports the main shaft (14). For example, a positive displacement pump (23) is provided in the bearing body (27).

[0036] The bearing body 27 is provided with a plurality of support legs 28. The support legs 28 protrude radially outward from the outer peripheral surface of the bearing body 27. For example, three support legs 28 are provided at intervals in the circumferential direction of the bearing body 27. The support legs 28 are fixed to the inner peripheral surface of the casing 20.

[0037] The compression mechanism (40) includes a fixed scroll (60) and a movable scroll (70). The fixed scroll (60) is fixed to the upper surface of the housing (50). The movable scroll (70) is disposed between the fixed scroll (60) and the housing (50).

[0038] The fixed scroll (60) has a fixed end plate (61), a fixed side wrap (62), and an outer peripheral wall (63). The outer peripheral wall (63) is formed in a substantially cylindrical shape. The outer peripheral wall (63) stands on the outer edge of the front surface (the lower surface in FIG. 2 ) of the fixed end plate (61).

[0039] The fixed side wrap (62) is formed in a spiral shape and is provided upright inside the outer peripheral wall (63) of the fixed side end plate (61).

[0040] The fixed scroll end plate (61) is located on the outer periphery and is formed continuously with the fixed scroll wrap (62). The tip end surface of the fixed scroll wrap (62) and the tip end surface of the outer periphery wall (63) are formed to be substantially flush with each other. The fixed scroll (60) is fixed to the housing (50).

[0041] The movable scroll (70) has a movable end plate (71), a movable lap (72), and a boss portion (73). The movable lap (72) is formed in a spiral shape. The movable lap (72) is formed on the upper surface of the movable end plate (71). The movable lap (72) meshes with the fixed lap (62).

[0042] The boss portion 73 is formed at the center of the lower surface of the movable end plate 71. The eccentric portion 15 of the drive shaft 11 is inserted into the boss portion 73, and the drive shaft 11 is connected to the boss portion 73.

[0043] The compression mechanism (40) has a fluid chamber (S) into which the refrigerant flows. The fluid chamber (S) is formed between a fixed scroll (60) and a movable scroll (70). The movable scroll (70) is disposed such that a movable wrap (72) meshes with a fixed wrap (62) of the fixed scroll (60).

[0044] An intake port (64) is formed in the outer peripheral wall (63) of the fixed scroll (60). The intake port (64) opens near the end of the fixed side wrap (62). The downstream end of the intake pipe (12) is connected to the intake port (64).

[0045] A discharge port (65) is formed in the center of the fixed end plate (61) of the fixed scroll (60). The discharge port (65) opens in the upper surface of the fixed end plate (61) of the fixed scroll (60). The high-pressure gas refrigerant discharged from the discharge port (65) flows through a passage (not shown) formed in the housing (50) into the upper space (24) below the housing (50) and above the motor (30).

[0046] An oil supply passage (16) is formed inside the drive shaft (11). The oil supply passage (16) extends vertically from the lower end to the upper end of the drive shaft (11). The lower end of the drive shaft (11) is connected to a pump (23). The lower end of the pump (23) is immersed in the oil reservoir (21). As the drive shaft (11) rotates, the pump (23) draws up oil from the oil reservoir (21) and delivers it to the oil supply passage (16).

[0047] The oil supply passage (16) supplies oil from the oil reservoir (21) to the sliding surface between the lower bearing (26) and the drive shaft (11), the sliding surface between the upper bearing (51) and the drive shaft (11), and also to the sliding surface between the boss portion (73) and the drive shaft (11). The oil supply passage (16) opens to the upper end surface of the drive shaft (11) and supplies oil above the drive shaft (11).

[0048] The oil supplied to the boss portion (73) flows out into the recessed portion (53) of the housing (50) through a gap between the eccentric portion (15) of the drive shaft (11) and the boss portion (73). When high-pressure oil is supplied to the recessed portion (53), a high pressure corresponding to the discharge pressure of the compression mechanism (40) acts on the recessed portion (53). The high pressure of the recessed portion (53) presses the movable scroll (70) against the fixed scroll (60).

[0049] An oil passage (55) is formed inside the housing (50) and the fixed scroll (60). An inlet end of the oil passage (55) communicates with the recess (53) of the housing (50). An outlet end of the oil passage (55) opens to the opposing surface of the fixed scroll (60). The oil passage (55) supplies high-pressure oil in the recess (53) to the opposing surface between the movable end plate (71) of the movable scroll (70) and the outer peripheral wall (63) of the fixed scroll (60).

[0050] The housing (50) is provided with an oil drain passage (52). The oil drain passage (52) is a passage for draining oil that has flowed into the recess (53) to the outside of the housing (50). The upstream end of the oil drain passage (52) communicates with the recess (53). An oil return member (56) is provided downstream of the oil drain passage (52).

[0051] The oil return member (56) guides downward the oil discharged from the recess (53) toward the oil discharge passage (52). A guide plate (57) is provided below the oil return member (56).

[0052] The guide plate (57) guides the oil discharged from the oil return member (56) to the oil return passage (35) of the motor (30). The guide plate (57) is formed of a tapered plate material whose opening width narrows from top to bottom. The lower part of the oil return member (56) is inserted into the upper part of the guide plate (57). The lower part of the guide plate (57) extends so as to pass through the gap between the casing (20) and the coil part of the motor (30) and the gap in the oil return passage (35).

[0053] <Oil return operation> However, if the oil discharged from the oil drain passage (52) of the housing (50) passes through the oil return passage (35) and flows forcefully down toward the oil reservoir (21) at the bottom of the casing (20), the oil surface in the oil reservoir (21) will be disturbed, which may cause air bubbles to form in the oil and deteriorate the lubricity of the oil.

[0054] Therefore, in this embodiment, the oil that has passed through the oil return passage (35) of the motor (30) can be slowly returned to the oil reservoir (21) at the bottom of the casing (20).

[0055] Specifically, as shown in Fig. 3, a first oil separation plate (80) as a first member and a second oil separation plate (90) as a second member are arranged below the motor (30). Fig. 4 is a perspective view showing the configuration of the first oil separation plate (80). In Figs. 3 and 4, the flow of oil is indicated by arrows.

[0056] The first oil separation plate (80) is attached to the lower side of the support legs (28). The first oil separation plate (80) is disposed so as to close the gap between a pair of adjacent support legs (28) of the three support legs (28) when viewed in the axial direction of the casing (20) (see also FIG. 5).

[0057] The first oil separation plate (80) has an oil receiving portion (81) and an oil outlet portion (82). The oil receiving portion (81) receives the oil that has passed through the oil return passage (35). The oil outlet portion (82) allows the oil received in the oil receiving portion (81) to flow out toward the bottom of the casing (20).

[0058] The oil outlet portion (82) is formed by a through hole (85). The through hole (85) opens at a position different from the oil receiving portion (81) in the first oil separation plate (80). A plurality of the through holes (85) are provided at intervals in the circumferential and radial directions of the casing (20).

[0059] The oil outlet (82) is provided at a position spaced apart from the oil receiving portion (81) in the circumferential direction of the casing (20). Specifically, the oil outlet (82) is provided downstream of the oil receiving portion (81) in the airflow that flows over the upper surface of the first member (80) in the circumferential direction of the casing (20). In this embodiment, the motor (30) rotates counterclockwise as viewed from the top surface of the motor (30).

[0060] The second oil separation plate (90) is disposed between the motor (30) and the first oil separation plate (80). The second oil separation plate (90) is attached to the upper side of the support leg (28). The second oil separation plate (90) covers the upper side of the first oil separation plate (80). The second oil separation plate (90) is disposed so as to close all of the gaps between the three support legs (28) when viewed in the axial direction of the casing (20) (see also FIG. 6).

[0061] The second oil separation plate (90) separates a gas space (36) above the second oil separation plate (90) in which gas refrigerant flows, from an oil space (37) in which oil flows between the second oil separation plate (90) and the first oil separation plate (80).

[0062] The second oil separation plate (90) has a communication passage (91). The communication passage (91) is formed by cutting out a part of the outer periphery of the second oil separation plate (90). The communication passage (91) opens at a position communicating with the oil return passage (35) and the oil receiver (81), as viewed in the axial direction of the casing (20).

[0063] Oil flowing toward the bottom of the casing (20) passes through the oil return passage (35). The oil that has passed through the oil return passage (35) passes through the communication passage (91) of the second oil separation plate (90) and strikes the oil receiver (81) of the first oil separation plate (80). The oil that has struck the oil receiver (81) flows circumferentially along the upper surface of the first oil separation plate (80) toward the through-hole (85) of the oil outlet (82). The oil then passes through the through-hole (85) and flows toward the oil reservoir (21).

[0064] Here, the motor (30) rotates counterclockwise when viewed from above the motor (30), and therefore, in the gas space (36) above the second oil separation plate (90), air containing gas refrigerant flows counterclockwise.

[0065] When the counterclockwise airflow enters the oil space (37) from the communication passage (91) of the second oil separation plate (90), it collides with the side wall surface of the support leg (28). As a result, the flow of the airflow is reversed in the oil space (37) and the airflow flows clockwise. The oil that collides with the oil outflow portion (82) is easily caused to flow toward the through-hole (85) of the oil outflow portion (82) by the airflow flowing over the upper surface of the first oil separation plate (80) in the circumferential direction of the casing (20).

[0066] -Effects of the first embodiment- According to this embodiment, the oil that has passed through the oil return passage (35) is temporarily received in the oil receiving portion (81) of the first member (80) to reduce the oil discharge speed, and then the oil is allowed to flow out from the oil outlet portion (82), thereby allowing the oil to be slowly returned to the oil reservoir (21) at the bottom of the casing (20). This reduces the risk of air bubbles being generated in the oil due to disturbances in the oil surface in the oil reservoir (21), which would deteriorate the lubricity of the oil.

[0067] According to this embodiment, the oil received in the oil receiver (81) can be returned to the oil reservoir (21) at the bottom of the casing (20) through the through-hole (85) formed in the first member (80).

[0068] According to this embodiment, the second member (90) is disposed between the motor (30) and the first member (80) to separate the gas space (36) above the second member (90), in which gas flows, from the oil space (37), in which oil flows between the second member (90) and the first member (80), thereby making it possible to prevent oil from rising.

[0069] According to this embodiment, by providing the oil outflow section (82) at a position away from the oil receiving section (81) in the circumferential direction of the casing (20), the oil that flows in the circumferential direction of the casing (20) after being received in the oil receiving section (81) can be discharged from the oil outflow section (82).

[0070] According to this embodiment, the oil flows more easily from the oil receiver (81) toward the oil outlet (82) due to the airflow that flows over the upper surface of the first member (80) in the circumferential direction of the casing (20).

[0071] According to the present embodiment, a refrigeration system (1) is provided, which includes a rotary compressor (10) and a refrigerant circuit (1a) through which a refrigerant compressed by the rotary compressor (10) flows. This makes it possible to provide a refrigeration system (1) including the rotary compressor (10) and the refrigerant circuit (1a).

[0072] Second Embodiment Hereinafter, the same parts as those in the first embodiment will be denoted by the same reference numerals, and only the differences will be described.

[0073] As shown in Fig. 7, the first oil separation plate (80) has an oil receiving portion (81) and an oil outlet portion (82). In Fig. 7, the flow of oil is indicated by arrows.

[0074] The oil receiving portion (81) receives the oil that has passed through the oil return passage (35). The oil outlet portion (82) allows the oil received in the oil receiving portion (81) to flow out toward the bottom of the casing (20).

[0075] The oil outflow portion (82) is formed by an inclined portion (86). The inclined portion (86) extends obliquely downward at a position different from the oil receiving portion (81) of the first oil separation plate (80). The inclined portion (86) is formed, for example, by bending a part of the outer peripheral edge of the first oil separation plate (80). The inclined portion (86) is inclined obliquely downward toward the radially outer side of the casing (20). A gap is provided between the lower edge of the inclined portion (86) and the inner peripheral wall of the casing (20).

[0076] The oil that has passed through the oil return passage (35) passes through the communication passage (91) of the second oil separation plate (90) and hits the oil receiver (81) of the first oil separation plate (80). The oil that hits the oil receiver (81) flows circumferentially along the upper surface of the first oil separation plate (80) toward the inclined portion (86) of the oil outlet portion (82). The oil that has flowed along the inclined surface of the inclined portion (86) heads toward the inner peripheral wall of the casing (20). The oil then flows down along the inner peripheral wall of the casing (20) toward the oil reservoir (21). By making the oil flow along the inner peripheral wall of the casing (20) in this way, the flow velocity of the oil can be further reduced.

[0077] -Effects of the second embodiment- According to this embodiment, the oil received in the oil receiver (81) can be returned to the oil reservoir (21) at the bottom of the casing (20) through the inclined portion (86) formed in the first member (80).

[0078] Third Embodiment As shown in Fig. 8, the first oil separation plate (80) has an oil receiving portion (81) and an oil outlet portion (82). In Fig. 8, the flow of oil is indicated by arrows.

[0079] The oil receiving portion (81) receives the oil that has passed through the oil return passage (35). The oil outlet portion (82) allows the oil received in the oil receiving portion (81) to flow out toward the bottom of the casing (20).

[0080] The oil outflow portion (82) is formed by a notch (87). The notch (87) is formed by cutting out a part of the outer periphery of the first oil separation plate (80) at a position different from the oil receiving portion (81) of the first oil separation plate (80). The notch (87) extends in the circumferential direction.

[0081] The oil that has passed through the oil return passage (35) passes through the communication passage (91) of the second oil separation plate (90) and hits the oil receiver (81) of the first oil separation plate (80). The oil that hits the oil receiver (81) flows circumferentially along the upper surface of the first oil separation plate (80) toward the notch (87) of the oil outlet portion (82). The oil then passes through the notch (87) and flows toward the oil reservoir (21).

[0082] -Effects of the third embodiment- According to this embodiment, the oil received in the oil receiver (81) can be returned to the oil reservoir (21) at the bottom of the casing (20) through the cutout (87) formed in the first member (80).

[0083] Other Embodiments Although the embodiments and modifications have been described above, it will be understood that various modifications in form and detail are possible without departing from the spirit and scope of the claims. Furthermore, elements of the above embodiments, modifications, and other embodiments may be combined or substituted as appropriate. Furthermore, the terms "first," "second," "third," etc. in the specification and claims are used to distinguish between terms to which these terms are attached, and do not limit the number or order of those terms. [Industrial Applicability]

[0084] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for rotary compressors and refrigeration devices. [Explanation of symbols]

[0085] 1 Refrigeration equipment 1a Refrigerant circuit 10 Rotary Compressor 11 Drive shaft 16 Fuel Line 20 Casing 21 Oil reservoir 30 motor 35 Oil return passage 40 Compression mechanism 50 Housing 52 Oil drain passage 53 Recess 80 First oil separation plate (first member) 81 Oil pan 82 Oil spill area 85 through hole 86 Slope 87 Notch 90 Second oil separator plate (second component) 91 Communication path

Claims

1. A rotary compressor including: a casing (20) having an oil reservoir (21) at its bottom; a compression mechanism (40) accommodated in the casing (20); a drive shaft (11) that rotationally drives the compression mechanism (40); and a motor (30) that is disposed below the compression mechanism (40) and rotates the drive shaft (11), a housing (50) disposed between the compression mechanism (40) and the motor (30); a first member (80) disposed below the motor (30); The drive shaft (11) is provided with an oil supply passage (16) that draws up oil from the oil reservoir (21), The housing (50) is provided with a recess (53) through which oil sucked up from the oil supply passage (16) flows out, and an oil drain passage (52) through which the oil flowing out into the recess (53) is discharged to the outside of the housing (50), The motor (30) is provided with an oil return passage (35) that penetrates in the axial direction between an outer peripheral surface of the motor (30) and an inner peripheral surface of the casing (20) and through which oil that has been discharged from the oil discharge passage (52) and is heading toward the bottom of the casing (20) passes, The first member (80) an oil receiver (81) for receiving oil that has passed through the oil return passage (35); an oil outlet portion (82) for causing the oil received in the oil receiving portion (81) to flow out toward the bottom of the casing (20). Rotary compressor.

2. 2. The rotary compressor of claim 1, The oil outlet portion (82) is formed by a through hole (85) that opens at a position different from the oil receiving portion (81) in the first member (80). Rotary compressor.

3. 2. The rotary compressor of claim 1, The oil outflow portion (82) is formed by an inclined portion (86) extending obliquely downward at a position different from the oil receiving portion (81) of the first member (80). Rotary compressor.

4. 2. The rotary compressor of claim 1, The oil outflow portion (82) is formed by a notch (87) formed by cutting out a part of the outer periphery of the first member (80) at a position different from the oil receiving portion (81) of the first member (80). Rotary compressor.

5. In the rotary compressor according to any one of claims 1 to 4, a second member (90) that is disposed between the motor (30) and the first member (80) and covers the upper side of the first member (80); The second member (90) has a communication passage (91) that opens at a position communicating with the oil return passage (35) and the oil receiver (81) when viewed in the axial direction of the casing (20). Rotary compressor.

6. In the rotary compressor according to any one of claims 1 to 4, The oil outlet (82) is provided at a position spaced apart from the oil receiver (81) in the circumferential direction of the casing (20). Rotary compressor.

7. The rotary compressor of claim 6, The oil outlet (82) is provided downstream of the oil receiver (81) in the air flow that flows over the upper surface of the first member (80) in the circumferential direction of the casing (20). Rotary compressor.

8. A rotary compressor (10) according to any one of claims 1 to 4; a refrigerant circuit (1a) through which the refrigerant compressed by the rotary compressor (10) flows. Refrigeration equipment.

Images