Rotary compressor and freezing device

Abstract

To inhibit a foreign matter from coming into contact with a sensor body to enable maintenance of oil detection accuracy.SOLUTION: A sensor casing (90) covers a sensor body (81) so as to section a sensor chamber (96) that accommodates the sensor body (81). At least two communication ports (97) are formed in the sensor casing (90). The communication ports (97) communicate with the interior of a casing (20) and the sensor chamber (96). The sensor body (81) detects oil flowing into the sensor chamber (96) from the interior of the casing (20) via the communication ports (97).SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] Patent Document 1 discloses an oil level detection device having a sensor body (detection unit) that detects oil stored at the bottom of a casing (housing). The sensor body includes a pair of electrodes extending into the oil storage space within the casing. The sensor body detects the oil level based on a change in capacitance as the space between the pair of electrodes is filled with oil.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional invention, since a pair of electrodes are extended into the casing, for example, forming occurring in the oil stored at the bottom of the casing, foreign matter mixed in the oil, etc. may come into contact with the sensor body, resulting in a possible decrease in the detection accuracy of the oil.

[0005] An object of the present disclosure is to suppress foreign matter from coming into contact with the sensor body and maintain the detection accuracy of the oil.

Means for Solving the Problems

[0006] A first aspect of the present disclosure is a rotary compressor including a compression mechanism (40) that compresses a refrigerant, the rotary compressor including a casing (20) that houses the compression mechanism (40) and stores oil at the bottom, and a sensor mechanism (80) that detects the oil at the bottom of the casing (20). The sensor mechanism (80) includes a sensor main body (81) and a sensor casing (90) that covers the sensor main body (81) so as to partition a sensor chamber (96) that houses the sensor main body (81). The sensor casing (90) is formed with at least two communication ports (97) that communicate with the inside of the casing (20) and the sensor chamber (96). The sensor main body (81) detects the oil that has flowed into the sensor chamber (96) from the inside of the casing (20) through the communication ports (97).

[0007] In the first aspect, the inside of the casing (20) and the sensor chamber (96) are partitioned by the sensor casing (90), and the sensor main body (81) is disposed in the sensor chamber (96), thereby suppressing contact between the sensor main body (81) and foaming occurring in the oil stored at the bottom of the casing (20) or foreign matter mixed in the oil, and maintaining the detection accuracy of the oil.

[0008] A second aspect of the present disclosure is the rotary compressor according to the first aspect, wherein the communication ports (97) include a first communication port (97a) that opens below the sensor casing (90) and a second communication port (97b) that opens above the sensor casing (90).

[0009] In the second aspect, the oil stored at the bottom of the casing (20) is caused to flow into the sensor chamber (96) from the first communication port (97a), and the air in the sensor chamber (96) is discharged from the second communication port (97b), thereby smoothly taking in the oil into the sensor chamber (96).

[0010] A third aspect of the present disclosure is the rotary compressor according to the first or second aspect, wherein the sensor main body (81) is detachably attached to the sensor casing (90).

[0011] In the third aspect, the maintainability of the sensor body (81) can be improved. Also, even when changing the specifications of the sensor body (81), it is possible to easily respond.

[0012] In the fourth aspect of the present disclosure, in any one of the rotary compressors according to the first to third aspects, the sensor casing (90) is welded to the casing (20).

[0013] In the fourth aspect, if the sensor body (81) is attached to the sensor casing (90) after welding the sensor casing (90) to the casing (20), it is possible to suppress the sensor body (81) from being affected by the heat generated during the welding operation.

[0014] In the fifth aspect of the present disclosure, in any one of the rotary compressors according to the first to fourth aspects, a permanent magnet (85) is provided in the sensor casing (90) adjacent to the communication port (97).

[0015] In the fifth aspect, even if foreign matter such as metal powder is mixed in the oil stored at the bottom of the casing (20), the foreign matter can be removed by the permanent magnet (85) before the oil containing the foreign matter flows into the sensor chamber (96).

[0016] In the sixth aspect of the present disclosure, in any one of the rotary compressors according to the first to fifth aspects, an oil supply / drain plug (87) communicating with the sensor chamber (96) is provided in the sensor casing (90).

[0017] In the sixth aspect, by providing an oil supply / drain plug (87) for performing an oil supply operation for supplying oil to the inside of the casing (20) or an oil drain operation for recovering oil from the inside of the casing (20) in the sensor casing (90), there is no need to weld the oil supply / drain plug (87) to the casing (20), and the man-hour can be reduced.

[0018] A seventh aspect of the present disclosure is that in any one of the rotary compressors according to the first to sixth aspects, a pipe (86) extending toward the inside of the casing (20) is connected to the communication port (97), and the tip of the pipe (86) is located below the sensor chamber (96).

[0019] In the seventh aspect, by arranging the tip of the pipe (86) below the sensor chamber (96), it is possible to suppress the formation occurring in the oil stored at the bottom of the casing (20) from flowing into the sensor chamber (96) from the tip of the pipe (86).

[0020] An eighth aspect of the present disclosure is that in any one of the rotary compressors according to the first to seventh aspects, the bottom surface of the sensor chamber (96) is inclined obliquely downward toward the inside of the casing (20).

[0021] In the eighth aspect, even when the casing (20) is installed at the site in an inclined posture, it is possible to easily return the oil in the sensor chamber (96) to the bottom of the casing (20) along the inclination of the bottom surface of the sensor chamber (96).

[0022] A ninth aspect of the present disclosure is a refrigeration device including any one of the rotary compressors according to the first to eighth aspects and a refrigerant circuit (1a) through which the refrigerant compressed by the rotary compressor (10) flows.

[0023] In the ninth aspect, it is possible to provide a refrigeration device including a rotary compressor (10) and a refrigerant circuit (1a).

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

DETAILED DESCRIPTION OF THE INVENTION

[0025] 《Embodiment 1》 As shown in FIG. 1, a scroll compressor (10) is provided in a refrigerating apparatus (1). The refrigerating apparatus (1) has a refrigerant circuit (1a) filled with a refrigerant. The refrigerant circuit (1a) includes a scroll compressor (10), a radiator (3), a decompression mechanism (4), and an evaporator (5). The decompression mechanism (4) is, for example, an expansion valve. The refrigerant circuit (1a) performs a vapor compression refrigeration cycle.

[0026] The refrigerating apparatus (1) is an air conditioner. The air conditioner may be a cooling-only unit, a heating-only unit, or an air conditioner that can switch between cooling and heating. In this case, the air conditioner has a switching mechanism (for example, a four-way switching valve) for switching the circulation direction of the refrigerant. The refrigerating apparatus (1) may be a water heater, a chiller unit, a cooling device for cooling the air in a room, or the like. The cooling device cools the air inside a refrigerator, a freezer, a container, or the like.

[0027] As shown in FIG. 2, the scroll compressor (10) includes a casing (20), an electric motor (30), and a compression mechanism (40). The casing (20) is formed in a vertically long cylindrical shape and is configured in a sealed dome type. The electric motor (30) and the compression mechanism (40) are housed in the casing (20).

[0028] The electric motor (30) has a stator (31) and a rotor (32). The stator (31) is fixed to the inner peripheral surface of the casing (20). The rotor (32) is disposed inside the stator (31). The drive shaft (11) penetrates the rotor (32). The rotor (32) is fixed to the drive shaft (11).

[0029] An oil sump portion (21) is provided at the bottom of the casing (20). Oil is stored in the oil sump portion (21). An intake pipe (12) is connected to the upper part of the casing (20). A discharge pipe (13) is connected to the body portion of the casing (20).

[0030] A housing (50) is fixed to the casing (20). The housing (50) is disposed above the electric motor (30). A compression mechanism (40) is disposed above the housing (50). The inflow end of the discharge pipe (13) is located between the electric motor (30) and the housing (50).

[0031] A recess (53) is formed in the housing (50). The recess (53) is formed by a part of the upper surface of the housing (50) being recessed. An upper bearing (51) is provided below the recess (53).

[0032] The drive shaft (11) extends in the vertical direction along the central axis of the casing (20). The drive shaft (11) has a main shaft portion (14) and an eccentric portion (15).

[0033] The eccentric portion (15) is provided at the upper end of the main shaft portion (14). The lower part of the main shaft portion (14) is rotatably supported by a lower bearing (22). The lower bearing (22) is fixed to the inner peripheral surface of the casing (20). A positive displacement pump (25), for example, is provided on the lower bearing (22). The upper part of the main shaft portion (14) penetrates the housing (50) and is rotatably supported by the upper bearing (51) of the housing (50).

[0034] 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).

[0035] The fixed scroll (60) has a fixed-side mirror 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-side mirror plate (61).

[0036] The fixed-side wrap (62) is formed in a spiral shape. The fixed-side wrap (62) stands inside the outer peripheral wall (63) on the fixed-side mirror plate (61).

[0037] The fixed-side mirror plate (61) is located on the outer peripheral side and is continuously formed with the fixed-side wrap (62). The front end surface of the fixed-side wrap (62) and the front end surface of the outer peripheral wall (63) are formed substantially flush. The fixed scroll (60) is fixed to the housing (50).

[0038] The movable scroll (70) has a movable-side mirror plate (71), a movable-side wrap (72), and a boss portion (73). The movable-side wrap (72) is formed in a spiral shape. The movable-side wrap (72) is formed on the upper surface of the movable-side mirror plate (71). The movable-side wrap (72) meshes with the fixed-side wrap (62).

[0039] The boss portion (73) is formed at the center of the lower surface of the movable-side mirror 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 thereto.

[0040] The compression mechanism (40) has a fluid chamber (S) into which refrigerant flows. The fluid chamber (S) is formed between the fixed scroll (60) and the movable scroll (70). The movable scroll (70) is disposed such that the movable-side wrap (72) meshes with the fixed-side wrap (62) of the fixed scroll (60).

[0041] 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 winding of the fixed-side wrap (62). The downstream end of the intake pipe (12) is connected to the intake port (64).

[0042] A discharge port (65) is formed at the center of the fixed-side end plate (61) of the fixed scroll (60). The discharge port (65) opens on the upper surface of the fixed-side end plate (61) of the fixed scroll (60). The high-pressure gas refrigerant discharged from the discharge port (65) flows out into the lower space (24) through a passage (not shown) formed in the housing (50).

[0043] 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 the pump (25). The lower end of the pump (25) is immersed in the oil sump (21). The pump (25) sucks up oil from the oil sump (21) as the drive shaft (11) rotates and conveys it to the oil supply passage (16). The oil supply passage (16) supplies the oil in the oil sump (21) to the sliding surfaces between the lower bearing (22) and the drive shaft (11), and between the upper bearing (51) and the drive shaft (11), and also supplies it to the sliding surface between the boss portion (73) and the drive shaft (11). The oil supply passage (16) opens on the upper end surface of the drive shaft (11) and supplies oil above the drive shaft (11).

[0044] The recess (53) in the housing (50) communicates with the oil supply passage (16) of the drive shaft (11) through the inside of the boss portion (73) of the movable scroll (70). High-pressure oil is supplied to the recess (53), so that a high pressure corresponding to the discharge pressure of the compression mechanism (40) acts.

[0045] An oil passage (55) is formed inside the housing (50) and the fixed scroll (60). The inflow end of the oil passage (55) communicates with the recess (53) of the housing (50). The outflow end of the oil passage (55) opens to the opposing surface of the fixed scroll (60). The oil passage (55) supplies the high-pressure oil in the recess (53) to the opposing surface between the movable-side mirror plate (71) of the movable scroll (70) and the outer peripheral wall (63) of the fixed scroll (60).

[0046] 〈Sensor mechanism〉 As shown in FIG. 3, a sensor mechanism (80) is provided in the casing (20). The sensor mechanism (80) detects the oil stored in the oil sump portion (21) at the bottom of the casing (20).

[0047] The sensor mechanism (80) includes a sensor main body (81) and a sensor casing (90). The sensor main body (81) includes a pair of electrode plates (82) and a support portion (83).

[0048] The pair of electrode plates (82) are erected in a posture where the plate thickness direction faces the horizontal direction. The pair of electrode plates (82) are arranged at intervals in the depth direction of the paper in FIG. 3. The support portion (83) supports the base end portions of the pair of electrode plates (82).

[0049] The sensor casing (90) includes a main body member (91) and a lid member (95). The main body member (91) and the lid member (95) define a sensor chamber (96). The electrode plates (82) of the sensor main body (81) are accommodated in the sensor chamber (96). The sensor casing (90) covers the electrode plates (82) of the sensor main body (81).

[0050] The main body member (91) includes a cylindrical portion (92), a closing portion (93), and a flange portion (94). The cylindrical portion (92) is formed in a cylindrical shape extending along the radial direction of the casing (20). Here, an opening hole (23) that opens laterally is formed in the casing (20) at a position communicating with the oil sump portion (21). The cylindrical portion (92) is welded to the casing (20) in a state of being inserted through the opening hole (23).

[0051] The blocking part (93) is provided at the end portion of the cylindrical part (92) located inside the casing (20). The blocking part (93) closes the opening end of the cylindrical part (92).

[0052] The flange part (94) is provided at the end portion of the cylindrical part (92) located outside the casing (20). The flange part (94) projects radially outward along the opening edge of the cylindrical part (92).

[0053] The support part (83) of the sensor main body (81) is attached to the lid member (95). The lid member (95) is detachably attached to the flange part (94) of the main body member (91) by fastening bolts (84). Thereby, the sensor main body (81) is detachably attached to the sensor casing (90).

[0054] A communication port (97) is formed in the sensor casing (90). The communication port (97) communicates between the inside of the casing (20) and the sensor chamber (96). The communication port (97) includes a first communication port (97a) and a second communication port (97b).

[0055] Specifically, the first communication port (97a) and the second communication port (97b) are formed in the cylindrical part (92) of the sensor casing (90). The first communication port (97a) opens downward of the sensor casing (90). The second communication port (97b) opens upward of the sensor casing (90).

[0056] Note that the number and position of the communication ports (97) are merely examples and are not limited thereto. For example, three or more communication ports (97) may be formed.

[0057] Oil stored in the oil sump part (21) at the bottom of the casing (20) flows into the sensor chamber (96) from the first communication port (97a). At this time, the air in the sensor chamber (96) is discharged from the second communication port (97b). Thereby, oil can be smoothly taken into the sensor chamber (96).

[0058] Further, by partitioning the interior of the casing (20) and the sensor chamber (96) with the sensor casing (90), it becomes difficult for foaming generated in the oil stored in the oil reservoir portion (21) and foreign matter mixed in the oil to enter the sensor chamber (96).

[0059] The sensor main body (81) detects the oil that has flowed into the sensor chamber (96) from the interior of the casing (20) through the first communication port (97a). Specifically, when the space between the pair of electrode plates (82) in the sensor main body (81) is filled with oil, the capacitance between the pair of electrode plates (82) becomes larger than when there is no oil between the pair of electrode plates (82). That is, by detecting the change in the capacitance of the sensor main body (81), it can be determined that oil exists up to the height position of the electrode plate (82).

[0060] In this way, by arranging the sensor main body (81) at a position where it is desired to detect the height of the oil level, it is possible to determine whether the oil stored in the oil reservoir portion (21) is in a state of shortage.

[0061] - Effects of Embodiment 1 - According to the features of the present embodiment, by partitioning the interior of the casing (20) and the sensor chamber (96) with the sensor casing (90) and arranging the sensor main body (81) in the sensor chamber (96), it is possible to suppress foaming generated in the oil stored at the bottom of the casing (20) and foreign matter mixed in the oil from coming into contact with the sensor main body (81), and maintain the detection accuracy of the oil.

[0062] According to the features of the present embodiment, by allowing the oil stored at the bottom of the casing (20) to flow into the sensor chamber (96) from the first communication port (97a) and discharging the air in the sensor chamber (96) from the second communication port (97b), the oil can be smoothly taken into the sensor chamber (96).

[0063] According to the features of this embodiment, by detachably attaching the sensor body (81) to the sensor casing (90), the maintainability of the sensor body (81) can be improved. Also, when changing the specifications of the sensor body (81), it can be easily dealt with.

[0064] According to the features of this embodiment, after welding the sensor casing (90) to the casing (20), if the sensor body (81) is attached to the sensor casing (90), the influence of the heat generated during the welding operation on the sensor body (81) can be suppressed.

[0065] According to the features of this embodiment, a refrigeration device can be provided which includes a rotary compressor (10) and a refrigerant circuit (1a) through which the refrigerant compressed by the rotary compressor (10) flows.

[0066] 《Embodiment 2》 Hereinafter, the same parts as those in the above Embodiment 1 are denoted by the same reference numerals, and only the differences will be described.

[0067] As shown in FIG. 4, the sensor mechanism (80) has a sensor body (81) and a sensor casing (90). The sensor casing (90) has a main body member (91) and a lid member (95). A sensor chamber (96) is defined by the main body member (91) and the lid member (95). The electrode plate (82) of the sensor body (81) is accommodated in the sensor chamber (96). The main body member (91) has a cylindrical portion (92), a closing portion (93), and a flange portion (94).

[0068] A communication port (97) is formed in the sensor casing (90). The communication port (97) communicates with the inside of the casing (20) and the sensor chamber (96). The communication port (97) includes a first communication port (97a) and a second communication port (97b). The first communication port (97a) and the second communication port (97b) open at a position near the closing portion (93) in the cylindrical portion (92).

[0069] The occlusion part (93) is provided with a permanent magnet (85). The permanent magnet (85) is formed in a ring shape. The inner diameter of the permanent magnet (85) is substantially equal to the outer diameter of the occlusion part (93). The permanent magnet (85) is fixed to the sensor casing (90) by being fitted into the occlusion part (93).

[0070] As a result, the permanent magnet (85) is arranged adjacent to the first communication port (97a) and the second communication port (97b).

[0071] -Effect of Embodiment 2- According to the features of this embodiment, even if foreign matters such as metal powder are mixed into the oil stored at the bottom of the casing (20), the foreign matters can be removed by the permanent magnet (85) before the oil containing the foreign matters flows into the sensor chamber (96).

[0072] <<Embodiment 3>> As shown in FIG. 5, the sensor mechanism (80) has a sensor main body (81) and a sensor casing (90). The sensor casing (90) has a main body member (91) and a lid member (95). The sensor chamber (96) is partitioned by the main body member (91) and the lid member (95). The electrode plate (82) of the sensor main body (81) is accommodated in the sensor chamber (96). The main body member (91) has a cylindrical part (92), an occlusion part (93), and a flange part (94).

[0073] A communication port (97) is formed in the sensor casing (90). The communication port (97) communicates with the inside of the casing (20) and the sensor chamber (96). The communication port (97) includes a first communication port (97a) and a second communication port (97b).

[0074] The first communication port (97a) is formed in the occlusion part (93) of the sensor casing (90). The first communication port (97a) is located near the lower part in the occlusion part (93) and extends so as to penetrate the occlusion part (93) in the thickness direction.

[0075] The second communication port (97b) is formed in the closing portion (93) of the sensor casing (90). The second communication port (97b) extends in the thickness direction of the closing portion (93) from the sensor chamber (96) side at a position closer to the upper part in the closing portion (93), and then extends upward so as to penetrate.

[0076] A pipe (86) is connected to the first communication port (97a). The pipe (86) extends toward the inside of the casing (20). The pipe (86) extends horizontally from the first communication port (97a), and then bends and extends obliquely downward toward the bottom of the casing (20). The tip of the pipe (86) is located below the sensor chamber (96).

[0077] -Effects of Embodiment 3- According to the features of this embodiment, by disposing the tip of the pipe (86) below the sensor chamber (96), it is possible to suppress the forming generated in the oil stored at the bottom of the casing (20) from flowing into the sensor chamber (96) from the tip of the pipe (86).

[0078] <<Embodiment 4>> As shown in FIG. 6, the sensor mechanism (80) includes a sensor main body (81) and a sensor casing (90). The sensor casing (90) includes a main body member (91) and a lid member (95). The sensor chamber (96) is partitioned by the main body member (91) and the lid member (95). The electrode plate (82) of the sensor main body (81) is accommodated in the sensor chamber (96). The main body member (91) includes a cylindrical portion (92), a closing portion (93), and a flange portion (94).

[0079] A connection port (98) is formed in the flange portion (94). The connection port (98) extends so as to penetrate in the radial direction of the flange portion (94). The connection port (98) communicates the outside of the casing (20) and the sensor chamber (96).

[0080] A communication port (97) is formed in the sensor casing (90). The communication port (97) communicates with the inside of the casing (20) and the sensor chamber (96). The communication port (97) includes a first communication port (97a) and a second communication port (97b).

[0081] The first communication port (97a) is formed in the closing portion (93) of the sensor casing (90). The first communication port (97a) is located near the lower part of the closing portion (93) and extends through the closing portion (93) in the thickness direction.

[0082] The second communication port (97b) is formed in the cylindrical portion (92) and the closing portion (93) of the sensor casing (90). The second communication port (97b) is located near the upper part of the cylindrical portion (92) and the closing portion (93) and extends through the cylindrical portion (92) and the closing portion (93) in the axial direction. The second communication port (97b) communicates with the inside of the casing (20) and the sensor chamber (96) through the connection port (98).

[0083] A pipe (86) is connected to the first communication port (97a). The pipe (86) extends toward the inside of the casing (20). The pipe (86) extends horizontally from the first communication port (97a) and then bends obliquely downward toward the bottom of the casing (20). The tip of the pipe (86) is located below the sensor chamber (96).

[0084] An oil supply / drain plug (87) is provided in the sensor casing (90). The oil supply / drain plug (87) is connected to the connection port (98). The oil supply / drain plug (87) communicates with the sensor chamber (96) through the connection port (98). The oil supply / drain plug (87) is used to perform an oil supply operation for supplying oil to the inside of the casing (20) or an oil drain operation for recovering oil from the inside of the casing (20).

[0085] - Effects of Embodiment 4 - According to the features of this embodiment, by providing an oil supply / drain plug (87) for performing an oil supply operation of supplying oil to the inside of the casing (20) or an oil drain operation of recovering oil from the inside of the casing (20) on the sensor casing (90), it is not necessary to weld the oil supply / drain plug (87) to the casing (20), and the man-hour can be reduced.

[0086] 《Embodiment 5》 As shown in FIG. 7, the sensor mechanism (80) includes a sensor main body (81) and a sensor casing (90). The sensor casing (90) includes a main body member (91) and a lid member (95). A sensor chamber (96) is defined by the main body member (91) and the lid member (95). The electrode plate (82) of the sensor main body (81) is accommodated in the sensor chamber (96). The main body member (91) has a cylindrical portion (92), a closing portion (93), and a flange portion (94).

[0087] A communication port (97) is formed in the sensor casing (90). The communication port (97) communicates with the inside of the casing (20) and the sensor chamber (96). The communication port (97) includes a first communication port (97a) and a second communication port (97b).

[0088] The first communication port (97a) and the second communication port (97b) are formed in the cylindrical portion (92) of the sensor casing (90). The first communication port (97a) opens downward of the sensor casing (90). The second communication port (97b) opens upward of the sensor casing (90).

[0089] The inner peripheral surface of the cylindrical portion (92) is formed in a tapered shape. Specifically, the inner peripheral surface of the cylindrical portion (92) is formed such that the inner diameter of the cylindrical portion (92) gradually increases from the outside to the inside of the casing (20). As a result, the bottom surface of the sensor chamber (96) is inclined obliquely downward toward the inside of the casing (20). As a result, the oil in the sensor chamber (96) can be easily returned to the bottom of the casing (20).

[0090] Here, in the posture where the axial direction of the casing (20) coincides with the vertical direction (the posture shown in FIG. 7), let the angle at which the bottom surface of the sensor chamber (96) is inclined with respect to the horizontal direction be θ. In this case, until the casing (20) is inclined by an angle θ in the counterclockwise direction in FIG. 7, the bottom surface of the sensor chamber (96) can maintain an inclined state.

[0091] -Effect of Embodiment 5- According to the features of this embodiment, even when the casing (20) is installed at the site in an inclined posture, it is possible to easily return the oil in the sensor chamber (96) to the bottom of the casing (20) along the inclination of the bottom surface of the sensor chamber (96).

[0092] 《Modification of Embodiment 5》 In the above Embodiment 5, the inner peripheral surface of the cylindrical portion (92) is formed in a tapered shape, but it is not limited to this form.

[0093] As shown in FIG. 8, even when the inner diameter of the cylindrical portion (92) is kept substantially constant, the inner peripheral surface of the cylindrical portion (92) may be formed so as to be inclined obliquely downward from the outside to the inside of the casing (20). As a result, the bottom surface of the sensor chamber (96) is in a state of being inclined obliquely downward toward the inside of the casing (20). As a result, it becomes easier to return the oil in the sensor chamber (96) to the bottom of the casing (20).

[0094] 《Other Embodiments》 Regarding the above embodiment, the following configuration may be adopted.

[0095] In this embodiment, the configuration in which only one sensor mechanism (80) is provided has been described, but it is not limited to this form. For example, a plurality of sensor mechanisms (80) may be arranged at intervals in the height direction. Thereby, the height of the oil level can be detected.

[0096] In this embodiment, the sensor mechanism (80) is configured to detect whether oil is present at the height position where the electrode plate (82) is disposed. However, by detecting a change in the capacitance value, the height of the oil level may be detected as well.

[0097] Specifically, by increasing the dimension of the electrode plate (82) in the height direction, as shown in FIG. 9, different capacitance values can be detected when the lower end portion of the electrode plate (82) is filled with oil and when the upper end portion of the electrode plate (82) is filled with oil. That is, when the oil fills up to the upper end portion of the electrode plate (82), the amount of oil present between the pair of electrode plates (82) increases, and the capacitance value increases. Thus, by detecting the change in the capacitance value, the height of the oil level can be detected.

[0098] In this embodiment, the support portion (83) of the sensor body (81) and the lid member (95) are configured as separate members. However, for example, without providing the support portion (83), the electrode plate (82) of the sensor body (81) may be directly attached to the lid member (95).

[0099] As described above, the embodiments and modified examples have been explained. It will be understood that various changes in form and details are possible without departing from the spirit and scope of the claims. Also, the elements according to the above embodiments, modified examples, and other embodiments may be appropriately combined or replaced. Further, the descriptions "first", "second", "third",... in the specification and claims are used to distinguish the phrases to which these descriptions are given, and do not limit the number or order of these phrases.

Industrial Applicability

[0100] As described above, the present disclosure is useful for a rotary compressor and a refrigeration apparatus.

Explanation of Signs

[0101] 1 Refrigeration apparatus 1a Refrigerant circuit 10 Rotary compressor (scroll compressor) 20 Casing 40 Compression mechanism 80 Sensor mechanism 81 Sensor body 85 Magnet 86 Pipe 87 Oil supply and drain plug 90 Sensor casing 96 Sensor chamber 97 Communication port 97a First communication port 97b Second communication port

Claims

1. A rotary compressor comprising a compression mechanism (40) for compressing a refrigerant, a casing (20) in which the compression mechanism (40) is housed and oil is stored at the bottom, and a sensor mechanism (80) for detecting the oil at the bottom of the casing (20). The sensor mechanism (80) has a sensor main body (81) and a sensor casing (90) that covers the sensor main body (81) so as to partition a sensor chamber (96) that houses the sensor main body (81). At least two communication ports (97) that communicate with the inside of the casing (20) and the sensor chamber (96) are formed in the sensor casing (90). The sensor main body (81) detects the oil that has flowed from the inside of the casing (20) into the sensor chamber (96) through the communication port (97). Rotary compressor.

2. In the rotary compressor according to Claim 1, the communication port (97) includes a first communication port (97a) that opens below the sensor casing (90) and a second communication port (97b) that opens above the sensor casing (90). Rotary compressor.

3. In the rotary compressor according to Claim 1 or 2, the sensor main body (81) is detachably attached to the sensor casing (90). Rotary compressor.

4. In the rotary compressor according to Claim 1 or 2, the sensor casing (90) is welded to the casing (20). Rotary compressor.

5. In the rotary compressor according to Claim 1 or 2, a permanent magnet (85) is provided in the sensor casing (90) adjacent to the communication port (97). Rotary compressor.

6. In the rotary compressor according to Claim 1 or 2, an oil supply / drain plug (87) that communicates with the sensor chamber (96) is provided in the sensor casing (90). Rotary compressor.

7. In the rotary compressor according to Claim 1 or 2, a pipe (86) extending toward the inside of the casing (20) is connected to the communication port (97), and the tip of the pipe (86) is located below the sensor chamber (96). Rotary compressor.

8. In the rotary compressor according to Claim 1 or 2, the bottom surface of the sensor chamber (96) is inclined obliquely downward toward the inside of the casing (20). Rotary compressor.

9. A rotary compressor (10) according to Claim 1 or 2, and a refrigerant circuit (1a) through which the refrigerant compressed by the rotary compressor (10) flows. Refrigeration device.

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