Compressor and refrigeration device

Abstract

A compressor (CMP) is provided with: a compressor main body housing (1); the compression mechanism part (2) is arranged in the compressor main body shell (1); and an accumulator (10) that is provided outside the compressor main body housing (1), is connected to the compression mechanism unit (2) via an outlet pipe (11), and has a through-hole (21) through which the outlet pipe (11) is inserted, the through-hole (21) being configured so that the outlet pipe (11) is inserted in the through-hole (21) in a plan view as viewed from the direction of the central axis of the accumulator (10). The center (Ox1) or the center of gravity of the portion of the outlet pipe (11) inserted into the through hole (21) is positioned closer to the compressor main body housing (1) than the central axis (O1) of the accumulator (10).

Description

Technical Field

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

[0002] Conventionally, there is a compressor having a single outlet pipe of the accumulator (for example, see Patent Document 1). In the above compressor, the outlet pipe is inserted into the bottom of the accumulator so that the central axis of the outlet pipe and the main body of the accumulator coincide with each other.

[0003] In addition, as a conventional compressor, there is a compressor having a plurality of outlet pipes of the liquid accumulator (for example, refer to Patent Documents 2 and 3). In the compressor having a plurality of outlet pipes, when the liquid accumulator is viewed from above, the plurality of outlet pipes are inserted into the bottom of the liquid accumulator in such a manner that the center of gravity of the insertion positions of the plurality of outlet pipes coincides with the central axis of the liquid accumulator.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2020 / 235076

[0007] Patent Document 2: Japanese Utility Model Publication No. 64-44388

[0008] Patent Document 3: International Publication No. 2019 / 142408 Summary of the invention

[0009] Problems to be solved by the invention

[0010] In the above compressor, the horizontal length from the connection portion of the outlet pipe on the compressor body shell side to the insertion portion on the accumulator side needs to be at least 1 / 2 of the diameter of the cylindrical accumulator, so the support rigidity of the accumulator cannot be fully obtained, and the structural inherent value of the accumulator is low. Therefore, the vibration frequency of the integral multiple of the rotation speed of the compressor easily reaches the structural inherent value of the accumulator, which causes the problem of increased vibration of the accumulator.

[0011] In particular, as the capacity of the compressor of the above structure increases, the diameter of the accumulator increases and the length of the outlet pipe further increases, thereby reducing the structural inherent value of the accumulator, and the vibration frequency of the compressor easily reaches the structural inherent value of the accumulator due to the increase in the speed of the compressor. Therefore, in particular, when the diameter of the accumulator is increased and the speed of the compressor is increased, it is necessary to increase the support rigidity of the accumulator.

[0012] The present disclosure proposes a compressor capable of suppressing vibration of an accumulator and a refrigeration device including the compressor.

[0013] Means for solving problems

[0014] A compressor according to a first aspect of the present disclosure includes:

[0015] Compressor body casing;

[0016] A compression mechanism portion, which is disposed in the compressor main body casing; and

[0017] The accumulator is arranged outside the compressor main body shell, connected to the compression mechanism via an outlet pipe, and has a through hole for the outlet pipe to be inserted through.

[0018] In a plan view viewed from the central axis direction of the accumulator, a center or a center of gravity of a portion of the outlet pipe inserted into the through hole is located closer to the compressor body casing than the central axis of the accumulator.

[0019] According to the present disclosure, the distance from the connection position of the outlet pipe on the compressor body shell side to the center (or center of gravity) of the portion of the outlet pipe inserted into the through hole of the liquid accumulator is shortened compared to a conventional compressor in which the outlet pipe is inserted in a manner consistent with the central axis of the liquid accumulator, and the supporting rigidity of the liquid accumulator is improved. As a result, the vibration of the liquid accumulator can be suppressed.

[0020] In addition, in the compressor of the second mode disclosed in the present invention, in the compressor of the first mode, when observed from above, when an imaginary straight line and an imaginary circle are assumed, the above-mentioned center or center of gravity is located within the above-mentioned imaginary circle, wherein the above-mentioned imaginary straight line passes through the central axis of the above-mentioned compressor main body shell and the central axis of the above-mentioned liquid reservoir, and the above-mentioned imaginary circle has the point where the above-mentioned imaginary straight line intersects the outer peripheral surface of the above-mentioned compressor main body shell as the center, and has the distance from the above-mentioned point to the central axis of the above-mentioned liquid reservoir as the radius.

[0021] According to the present disclosure, the distance from the connection position of the outlet pipe on the compressor body casing side to the center (or center of gravity) of the portion of the outlet pipe inserted into the through hole of the accumulator is shortened, and the supporting rigidity of the accumulator can be improved.

[0022] Furthermore, in the compressor of the third aspect of the present disclosure, in the compressor of the second aspect, the center or the center of gravity is located on the virtual straight line in the plan view.

[0023] According to the present disclosure, the supporting rigidity of the accumulator can be further improved.

[0024] In a compressor according to a fourth aspect of the present disclosure, in the compressor according to any one of the first to third aspects, an end portion of the accumulator in the central axis direction has a flat surface portion along a radial direction of the accumulator, and the through hole is provided in the flat surface portion.

[0025] According to the present disclosure, since the outlet pipe is inserted into the through hole provided in the flat surface portion at the end of the reservoir, the connection operation of the outlet pipe to the reservoir can be easily performed.

[0026] In addition, in a compressor of a fifth aspect of the present disclosure, in the compressor of any one of the first to third aspects, an end portion of the accumulator in the central axis direction has a curved surface portion connected to an outer peripheral side surface of the accumulator, and the through hole is provided in the curved surface portion.

[0027] According to the present disclosure, the outlet pipe is inserted into a through hole provided in a curved portion connected to the outer peripheral side surface of the liquid reservoir. Therefore, compared with the case where the outlet pipe is inserted into the flat portion, the strength of the connection portion between the through hole of the liquid reservoir and the outlet pipe at the curved portion becomes higher, and the distance from the connection position of the outlet pipe on the compressor body casing side to the center (or center of gravity) of the portion where the outlet pipe is inserted into the through hole of the liquid reservoir can be shortened. The rigidity of the connection portion between the liquid reservoir and the outlet pipe is improved, and the supporting rigidity of the liquid reservoir can be further improved.

[0028] In addition, in a compressor of a sixth aspect of the present disclosure, in the compressor of any one of the first to fifth aspects, the outlet pipe has an oil return hole that communicates with the space in the accumulator and is located near the lowermost portion of the accumulator.

[0029] According to the present disclosure, the oil accumulated at the bottom of the accumulator can be easily returned to the compressor body casing.

[0030] Furthermore, a refrigeration device according to a seventh aspect of the present invention includes the compressor according to any one of the first to sixth aspects.

[0031] According to the present disclosure, a low-noise refrigeration device can be realized by providing a compressor capable of suppressing vibration of an accumulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the compressor according to the first embodiment of the present disclosure as viewed from the side.

[0033] Figure 2 This is a schematic plan view of the compressor according to the first embodiment as viewed from above the accumulator.

[0034] Figure 3 It is a schematic diagram of a compressor according to a second embodiment of the present disclosure as viewed from the side.

[0035] Figure 4 This is a schematic plan view of the compressor according to the second embodiment as viewed from above the accumulator.

[0036] Figure 5 It is a schematic diagram of a compressor according to a third embodiment of the present disclosure as viewed from the side.

[0037] Figure 6 The schematic plan view of the compressor according to the third embodiment as viewed from above the accumulator.

[0038] Figure 7 It is a schematic plan view of the compressor according to the first modified example as viewed from above the accumulator.

[0039] Figure 8 The schematic plan view of the compressor according to the second modified example is shown as viewed from above the accumulator.

[0040] Fig. 9 It is a schematic diagram of a compressor according to a fourth embodiment of the present disclosure as viewed from the side.

[0041] Fig.10 It is a schematic diagram of a compressor according to a fifth embodiment of the present disclosure as viewed from the side.

[0042] Fig.11 This is a circuit diagram of an air conditioner as an example of a refrigeration device including a refrigerant circuit using a compressor according to a sixth embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] The following is a description of the embodiments. In addition, in the drawings, the same reference numerals represent the same parts or equivalent parts. In addition, the dimensions on the drawings such as length, width, thickness, depth, etc. are appropriately changed from the actual scale for the clarity and simplification of the drawings, and do not represent the actual relative dimensions.

[0044] (First Embodiment)

[0045] Figure 1 1 is a schematic diagram of a compressor CMP according to a first embodiment of the present disclosure as viewed from the side. The compressor CMP is a rotary compressor of a single-cylinder structure.

[0046] like Figure 1 As shown, the compressor CMP of the first embodiment comprises: a compressor body housing 1; a compression mechanism 2 disposed in the compressor body housing 1; and a motor 3 disposed above the compression mechanism 2 in the compressor body housing 1 and driving the compression mechanism 2 via a rotating shaft (not shown). The outer peripheral surface of the compressor body housing 1 is cylindrical.

[0047] The compressor CMP includes a liquid reservoir 10, which is provided outside the compressor body housing 1 and is connected to the compression mechanism 2 via an outlet pipe 11. The outer peripheral surface of the liquid reservoir 10 is cylindrical. The lower end portion (the end portion in the central axis direction) of the liquid reservoir 10 has a plane portion 10a along the radial direction of the liquid reservoir 10. A through hole 21 is provided in the plane portion 10a for the outlet pipe 11 to be inserted.

[0048] The outlet pipe 11 has an oil return hole 11a communicating with the space in the reservoir 10 and located near the bottom of the reservoir 10. The oil return hole 11a is provided at a height distance of about 5 to 15 mm from the bottom surface in the reservoir 10.

[0049] The compression mechanism 2 sucks refrigerant gas from the accumulator 10 through the outlet pipe 11. The refrigerant gas is obtained by controlling a condenser, an expansion mechanism, and an evaporator (not shown) which constitute an air conditioner as an example of a refrigeration device together with the compressor CMP.

[0050] Figure 2 It is a schematic plan view of the compressor CMP according to the first embodiment as viewed from above the accumulator 10 .

[0051] like Figure 2 As shown, in a plan view viewed from above (in the central axis direction) the accumulator 10 , the center Ox1 of the portion of the outlet pipe 11 inserted into the through hole 21 is located closer to the compressor body housing 1 than the central axis O1 of the accumulator 10 .

[0052] In the above-mentioned top view, a virtual straight line VL and a virtual circle VC are assumed, wherein the virtual straight line VL passes through the central axis O2 of the compressor body housing 1 and the central axis O1 of the accumulator 10, and the virtual circle VC is centered at a point A where the virtual straight line VL intersects the outer peripheral surface of the compressor body housing 1 and has a radius r of the distance from the point A to the central axis O1 of the accumulator 10. At this time, the center Ox1 of the portion of the outlet pipe 11 inserted into the through hole 21 is located within the virtual circle VC.

[0053] In the compressor CMP of the above structure, when the accumulator 10 is viewed from above from the center axis direction, the center Ox1 of the portion of the outlet pipe 11 inserted into the through hole 21 is located closer to the compressor body case 1 side than the center axis O1 of the accumulator 10. As a result, the distance L1 from the connection position (point A) of the outlet pipe 11 closer to the compressor body case 1 side to the center Ox1 of the portion of the outlet pipe 11 inserted into the through hole 21 of the accumulator 10 is shorter than that of a conventional compressor in which the outlet pipe is inserted in a manner consistent with the center axis of the accumulator, and the support rigidity of the accumulator 10 is improved. As a result, the vibration of the accumulator 10 can be suppressed.

[0054] In addition, the center Ox1 of the portion of the outlet pipe 11 inserted into the through hole 21 of the liquid reservoir 10 is located within the imaginary circle VC. As a result, the distance L1 from the connection position (point A) of the outlet pipe 11 on the compressor main body casing 1 side to the center Ox1 of the portion of the outlet pipe 11 inserted into the through hole 21 becomes shorter, which can improve the supporting rigidity of the liquid reservoir 10.

[0055] In the first embodiment, the center Ox1 of the portion of the outlet tube 11 inserted into the through hole 21 of the reservoir 10 is located within the virtual circle VC and on the virtual line VL in a plan view, thereby further improving the supporting rigidity of the reservoir 10 .

[0056] Furthermore, since the outlet tube 11 is inserted through the through hole 21 provided in the flat surface portion 10 a of the reservoir 10 , the connection operation of the outlet tube 11 to the reservoir 10 can be easily performed.

[0057] Furthermore, the oil return hole 11 a communicating with the space in the accumulator 10 is located near the lowermost portion of the accumulator 10 , thereby making it possible to easily return the oil accumulated at the bottom of the accumulator 10 to the compressor body casing 1 .

[0058] (Second Embodiment)

[0059] Figure 3 1 is a schematic diagram of a compressor CMP according to a second embodiment of the present disclosure as viewed from the side. The compressor CMP is a rotary compressor of a twin-cylinder structure.

[0060] like Figure 3 As shown, the compressor CMP of the second embodiment comprises: a compressor body housing 1; a compression mechanism 2 disposed in the compressor body housing 1; and a motor 3 disposed above the compression mechanism 2 in the compressor body housing 1 and driving the compression mechanism 2 via a rotating shaft (not shown). The outer peripheral surface of the compressor body housing 1 is cylindrical.

[0061] The compressor CMP includes a liquid reservoir 10, which is arranged outside the compressor body housing 1 and is connected to the compression mechanism 2 via two outlet pipes 11A and 11B. The outer peripheral surface of the liquid reservoir 10 is cylindrical. The lower end portion (the end portion in the central axis direction) of the liquid reservoir 10 has a plane portion 10a along the radial direction of the liquid reservoir 10. A through hole 21 is provided in the plane portion 10a for the outlet pipe 11A to be inserted through. In addition, a through hole 22 is provided in the plane portion 10a for the outlet pipe 11B to be inserted through.

[0062] The outlet pipe 11A has an oil return hole 11Aa communicating with the space in the reservoir 10 and located near the bottom of the reservoir 10. The outlet pipe 11B has an oil return hole 11Ba communicating with the space in the reservoir 10 and located near the bottom of the reservoir 10.

[0063] The oil return holes 11Aa and 11Ba are provided at intervals of about 5 mm to 15 mm in the height direction with respect to the bottom surface in the accumulator 10 .

[0064] Figure 4It is a schematic plan view of the compressor CMP according to the second embodiment as viewed from above the accumulator 10 .

[0065] like Figure 4 As shown, when viewed from above (in the direction of the central axis) of the accumulator 10, the center of gravity Ox2 of the portion of the outlet pipe 11A inserted into the through hole 21 and the portion of the outlet pipe 11B inserted into the through hole 22 is located closer to the compressor body housing 1 than the central axis O1 of the accumulator 10. Here, the center of gravity Ox2 is the center of gravity of the central positions of the above-mentioned portions, and the coordinates of the center of gravity Ox2 are given by the arithmetic mean of the coordinates of the centers of gravity of the through holes 21 and 22.

[0066] In the above-mentioned top view, an imaginary straight line VL and an imaginary circle VC are assumed, wherein the imaginary straight line VL passes through the central axis O2 of the compressor body housing 1 and the central axis O1 of the accumulator 10, and the imaginary circle VC is centered at a point A where the imaginary straight line VL intersects the outer peripheral surface of the compressor body housing 1 and has a radius r of the distance from the point A to the central axis O1 of the accumulator 10. At this time, the above-mentioned center of gravity Ox2 is located within the imaginary circle VC.

[0067] In the compressor CMP of the above structure, when the accumulator 10 is viewed from the center axis direction, the center of gravity Ox2 of the portion of the outlet pipe 11A inserted into the through hole 21 and the portion of the outlet pipe 11B inserted into the through hole 22 is located closer to the compressor body housing 1 than the center axis O1 of the accumulator 10. As a result, the distance L2 from the connection position (point A) of the outlet pipe 11 on the compressor body housing 1 side to the center of gravity Ox2 is shorter than that of a conventional compressor in which the centers of gravity of the two outlet pipes are located on the center axis of the accumulator, and the support rigidity of the accumulator 10 is improved. As a result, the vibration of the accumulator 10 can be suppressed.

[0068] In addition, the center of gravity Ox2 of the portion of the outlet pipe 11A inserted into the through hole 21 and the portion of the outlet pipe 11B inserted into the through hole 22 are located within the imaginary circle VC. As a result, the distance L2 from the connection position (point A) of the outlet pipe 11 on the compressor main body casing 1 side to the center of gravity Ox2 is shortened, which can improve the supporting rigidity of the liquid reservoir 10.

[0069] In the second embodiment described above, the center of gravity Ox2 is located within the virtual circle VC and on the virtual straight line VL in a plan view, whereby the support rigidity of the accumulator 10 is further improved.

[0070] In addition, outlet pipe 11A is inserted through through hole 21 provided in planar portion 10a of liquid reservoir 10, and outlet pipe 11B is inserted through through hole 22 provided in planar portion 10a of liquid reservoir 10, so that outlet pipes 11A and 11B can be easily connected to liquid reservoir 10.

[0071] Furthermore, the oil return hole 11Aa connected to the space inside the reservoir 10 is located near the bottom of the reservoir 10, and the oil return hole 11Ba connected to the space inside the reservoir 10 is located near the bottom of the reservoir 10, thereby making it easy to return the oil accumulated at the bottom of the reservoir 10 to the compressor body casing 1.

[0072] (Third Embodiment)

[0073] Figure 5 This is a schematic diagram of a compressor CMP according to a third embodiment of the present disclosure as viewed from the side. The compressor CMP is a rotary compressor having a three-cylinder structure.

[0074] The compressor CMP includes a liquid reservoir 10, which is arranged outside the compressor body housing 1 and is connected to the compression mechanism 2 via three outlet pipes 11A, 11B, and 11C. The outer peripheral surface of the liquid reservoir 10 is cylindrical. The lower end portion (the end portion in the direction of the central axis) of the liquid reservoir 10 has a plane portion 10a along the radial direction of the liquid reservoir 10. A through hole 21 is provided in the plane portion 10a for the outlet pipe 11A to be inserted through. A through hole 22 is provided in the plane portion 10a for the outlet pipe 11B to be inserted through. A through hole 23 is provided in the plane portion 10a for the outlet pipe 11C to be inserted through.

[0075] The outlet pipe 11A has an oil return hole 11Aa communicating with the space inside the reservoir 10 and located near the lowest part of the reservoir 10. The outlet pipe 11B has an oil return hole 11Ba communicating with the space inside the reservoir 10 and located near the lowest part of the reservoir 10. The outlet pipe 11C has an oil return hole (not shown) communicating with the space inside the reservoir 10 and located near the lowest part of the reservoir 10.

[0076] The oil return holes 11Aa and 11Ba and the oil return hole of the outlet pipe 11C are provided at intervals of about 5 mm to 15 mm in the height direction with respect to the bottom surface in the accumulator 10 .

[0077] Figure 6 It is a schematic plan view of the compressor CMP according to the third embodiment as viewed from above the accumulator 10 .

[0078] like Figure 6 As shown, when viewed from above (in the direction of the central axis) of the accumulator 10, the center of gravity Ox3 of the portion of the outlet pipe 11A inserted into the through hole 21, the portion of the outlet pipe 11B inserted into the through hole 22, and the portion of the outlet pipe 11C inserted into the through hole 23 is located closer to the compressor body housing 1 than the central axis O1 of the accumulator 10. Here, the center of gravity Ox3 is the center of gravity of the central positions of the above-mentioned portions, and the center of gravity Ox3 is given by the arithmetic mean of the center coordinates of the through holes 21, 22, and 23.

[0079] In the above-mentioned top view, a virtual straight line VL and a virtual circle VC are assumed, wherein the virtual straight line VL passes through the central axis O2 of the compressor body housing 1 and the central axis O1 of the accumulator 10, and the virtual circle VC is centered at a point A where the virtual straight line VL intersects the outer peripheral surface of the compressor body housing 1 and has a radius r of the distance from the point A to the central axis O1 of the accumulator 10. At this time, the above-mentioned center of gravity Ox3 is located within the virtual circle VC.

[0080] In the compressor CMP of the above structure, when the accumulator 10 is viewed from the center axis direction, the center of gravity Ox3 of the portion of the outlet pipe 11A inserted into the through hole 21, the portion of the outlet pipe 11B inserted into the through hole 22, and the portion of the outlet pipe 11C inserted into the through hole 23 is located closer to the compressor body housing 1 than the center axis O1 of the accumulator 10. As a result, the distance L3 from the connection position (point A) of the outlet pipe 11 on the compressor body housing 1 side to the center of gravity Ox3 is shorter than that of a conventional compressor in which the center of gravity of the plurality of outlet pipes is located on the center axis of the accumulator, and the support rigidity of the accumulator 10 is improved. As a result, the vibration of the accumulator 10 can be suppressed.

[0081] In addition, the center of gravity Ox3 of the portion of the outlet pipe 11A inserted into the through hole 21, the portion of the outlet pipe 11B inserted into the through hole 22, and the portion of the outlet pipe 11C inserted into the through hole 23 are located within the imaginary circle VC. As a result, the distance L3 from the connection position (point A) of the outlet pipe 11 on the compressor main body casing 1 side to the center of gravity Ox3 is shortened, which can improve the supporting rigidity of the liquid reservoir 10.

[0082] In the third embodiment described above, the center of gravity Ox3 is located within the virtual circle VC and on the virtual straight line VL in a plan view, whereby the supporting rigidity of the accumulator 10 is further improved.

[0083] Furthermore, since the outlet tubes 11A, 11B, 11C are inserted through the through holes 21 , 22 , 23 provided in the flat surface portion 10 a of the reservoir 10 , the outlet tubes 11A, 11B, 11C can be easily connected to the reservoir 10 .

[0084] In addition, the oil return hole 11Aa connected to the space inside the reservoir 10 is located near the bottom of the reservoir 10, the oil return hole 11Ba connected to the space inside the reservoir 10 is located near the bottom of the reservoir 10, and the oil return hole of the outlet pipe 11C connected to the space inside the reservoir 10 is located near the bottom of the reservoir 10, thereby making it easy to return the oil accumulated at the bottom of the reservoir 10 to the compressor body casing 1.

[0085] In the third embodiment, the portion of the outlet pipe 11A inserted into the through hole 21, the portion of the outlet pipe 11B inserted into the through hole 22, and the portion of the outlet pipe 11C inserted into the through hole 23 are all located within the imaginary circle VC, but this is not limited to this, as long as the center of gravity Ox3 is located within the imaginary circle VC.

[0086] For example, Figure 7 As shown in the first modified example, the portion of the outlet pipe 11A inserted into the through hole 21 is located within the imaginary circle VC. Even if the portion of the outlet pipe 11B inserted into the through hole 22 and the portion of the outlet pipe 11C inserted into the through hole 23 are located outside the imaginary circle VC, it is sufficient as long as the center of gravity Ox3 is located within the imaginary circle VC.

[0087] In addition, if Figure 8 As shown in the second modified example, the portion of the outlet pipe 11A inserted into the through hole 21 and the portion of the outlet pipe 11B inserted into the through hole 22 are located within the imaginary circle VC. Even if the portion of the outlet pipe 11C inserted into the through hole 23 is located outside the imaginary circle VC, it is sufficient as long as the center of gravity Ox3 is located within the imaginary circle VC.

[0088] (Fourth Embodiment)

[0089] Fig. 9 The compressor CMP of the fourth embodiment of the present disclosure is schematically viewed from the side. The compressor CMP of the fourth embodiment has the same structure as the compressor CMP of the first embodiment except for the shape of the accumulator 10 and the position where the outlet pipe 11A is inserted.

[0090] like Fig. 9 As shown, the compressor CMP of the fourth embodiment includes an accumulator 10 which is provided outside a compressor body casing 1 and is connected to a compression mechanism 2 via an outlet pipe 11. The outer peripheral surface of the accumulator 10 is cylindrical.

[0091] The lower end portion (the end portion in the central axis direction) of the reservoir 10 has a planar portion 10a along the radial direction of the reservoir 10 and a curved portion 10b connected to the outer peripheral side surface between the planar portion 10a and the outer peripheral side surface. The curved portion 10b is provided with a through hole 21 through which the outlet pipe 11 is inserted.

[0092] In the compressor CMP of the above-mentioned structure, compared with the case where the outlet pipe 11 is inserted into the flat portion 10a, the strength of the connection portion between the through hole 21 of the liquid reservoir 10 and the outlet pipe 11 at the curved portion 10b becomes higher, and the distance L4 from the connection position of the outlet pipe 11 on the compressor body casing 1 side to the center Ox4 of the portion where the outlet pipe 11 is inserted into the through hole 21 of the liquid reservoir 10 can be shortened, the rigidity of the connection portion between the liquid reservoir 10 and the outlet pipe 11 is improved, and the supporting rigidity of the liquid reservoir 10 can be further improved.

[0093] The compressor CMP of the fourth embodiment has the same effects as those of the compressor CMP of the first embodiment.

[0094] (Fifth Embodiment)

[0095] Fig.10 This is a schematic diagram of a compressor CMP according to a fifth embodiment of the present disclosure as viewed from the side. The compressor CMP is a rotary compressor having a twin-cylinder structure.

[0096] like Fig.10 As shown, the compressor CMP includes a liquid reservoir 10, which is arranged outside the compressor body shell 1 and is connected to the compression mechanism part 2 via the outlet pipe 11. The outer peripheral surface of the liquid reservoir 10 is cylindrical. The lower end portion (the end in the center axis direction) of the liquid reservoir 10 has a plane portion 10a along the radial direction of the liquid reservoir 10, and a curved portion 10b connected to the outer peripheral side surface between the plane portion 10a and the outer peripheral side surface. A through hole 21 is provided in the curved portion 10b for the outlet pipe 11A to pass through. A through hole 22 is provided in the plane portion 10a for the outlet pipe 11B to pass through.

[0097] The outlet pipe 11A has an oil return hole 11Aa communicating with the space in the reservoir 10 and located near the bottom of the reservoir 10. The outlet pipe 11B has an oil return hole 11Ba communicating with the space in the reservoir 10 and located near the bottom of the reservoir 10.

[0098] The oil return holes 11Aa and 11Ba are provided at intervals of about 5 mm to 15 mm in the height direction with respect to the bottom surface in the accumulator 10 .

[0099] In the fifth embodiment, similarly to the second embodiment, in a plan view from above (in the direction of the central axis) of the accumulator 10, the center of gravity Ox5 of the portion of the outlet pipe 11A inserted into the through hole 21 and the portion of the outlet pipe 11B inserted into the through hole 22 is located closer to the compressor body housing 1 than the central axis O1 of the accumulator 10. In addition, in the plan view, a virtual straight line VL passing through the central axis O2 of the compressor body housing 1 and the central axis O1 of the accumulator 10 and a virtual circle VC are assumed, the virtual straight line VL passing through the central axis O2 of the compressor body housing 1 and the central axis O1 of the accumulator 10, the virtual circle VC having the point A where the virtual straight line VL intersects the outer peripheral surface of the compressor body housing 1 as the center and the distance from the point A to the central axis O1 of the accumulator 10 as the radius r. At this time, the center of gravity Ox5 is located within the virtual circle VC.

[0100] In the compressor CMP of the above structure, the distance L5 from the connection position (point A) of the outlet pipe 11 on the compressor body casing side to the center of gravity Ox5 is shorter than that of a conventional compressor in which the center of gravity of the two outlet pipes is located at the central axis of the accumulator, and the supporting rigidity of the accumulator 10 is improved. As a result, the vibration of the accumulator 10 can be suppressed.

[0101] The compressor CMP of the fifth embodiment has the same effects as those of the compressor CMP of the second embodiment.

[0102] (Sixth Embodiment)

[0103] Fig.11 This is a circuit diagram of an air conditioner as an example of a refrigeration device including a refrigerant circuit using a compressor CMP according to a sixth embodiment of the present disclosure. In this refrigerant circuit RC, any of the compressors CMP according to the first to fifth embodiments is used.

[0104] like Fig.11 As shown in FIG. 1 , the air conditioner according to the fifth embodiment includes an indoor unit U1 installed in a room to be air-conditioned and an outdoor unit U2 installed outdoors.

[0105] <Structure of indoor unit U1>

[0106] The indoor unit U1 of the air conditioner includes an indoor heat exchanger 1004, one end of which is connected to the refrigerant pipe L14 (communication pipe) and the other end of which is connected to the refrigerant pipe L15 (communication pipe), and an indoor fan 1006 that supplies air to the indoor heat exchanger 1004. The indoor fan 1006 blows the air whose temperature and the like have been adjusted by the indoor heat exchanger 1004 into the room.

[0107] <Structure of outdoor unit U2>

[0108] The outdoor unit U2 of the air conditioner includes a compressor CMP, a four-way switching valve 1001 , an outdoor heat exchanger 1002 , an expansion valve 1003 as an example of an expansion mechanism, an accumulator 10 , and an outdoor fan 1005 for sending air to the outdoor heat exchanger 1002 .

[0109] The discharge side of the compressor CMP is connected to the first valve port a of the four-way switching valve 1001 via the refrigerant piping L11. The second valve port b of the four-way switching valve 1001 is connected to one end of the outdoor heat exchanger 1002 via the refrigerant piping L12. The other end of the outdoor heat exchanger 1002 is connected to one end of the expansion valve 1003 via the refrigerant piping L13, and the other end of the expansion valve 1003 is connected to one end of the refrigerant piping L14 (communication piping). One end of the refrigerant piping L15 (communication piping) is connected to the third valve port c of the four-way switching valve 1001. The fourth valve port d of the four-way switching valve 1001 is connected to the suction side of the compressor CMP via the refrigerant piping L16, the accumulator 10, and the outlet pipe 11.

[0110] The refrigerant flowing through the outdoor heat exchanger 1002 exchanges heat with the air sucked in by the outdoor fan 1005 .

[0111] The expansion valve 1003 is, for example, an electric valve whose opening degree can be adjusted, and the opening degree varies according to a signal from a control device (not shown).

[0112] In addition, Fig.11 In the embodiment, the compression mechanism 2 and the accumulator 10 are connected via one outlet pipe 11, but when the compressor CMP of the second to fifth embodiments is used, they are connected via two outlet pipes 11A and 11B, or via three outlet pipes 11A, 11B, and 11C.

[0113] <Structure of Refrigerant Circuit RC>

[0114] The refrigerant circuit RC of the air conditioner is composed of the indoor heat exchanger 1004, the compressor CMP, the four-way switching valve 1001, the outdoor heat exchanger 1002, the expansion valve 1003, the accumulator 10, the refrigerant pipes L11 to L16, and the outlet pipe 11. Thus, a circular refrigerant circuit RC is formed.

[0115] In refrigeration operation, Fig.11 As shown, the four-way switching valve 1001 is switched to the switching position of the solid line. In the heating operation, the four-way switching valve 1001 is switched to the switching position of the dotted line to drive the compressor CMP, thereby the refrigerant circulates in the refrigerant circuit RC.

[0116] According to the air conditioner having the above configuration, by including the refrigerant circuit RC using the compressor CMP, it is possible to realize the air conditioner in which vibration of the compressor CMP is suppressed.

[0117] In the sixth embodiment, an air conditioner is described as the refrigeration device. However, the refrigeration device including the refrigerant circuit RC using the compressor CMP is not limited to the air conditioner, and may be a refrigeration device of another structure.

[0118] In the first to fifth embodiments described above, the rotary compressor has been described. However, the present disclosure can also be applied to compressors of other structures such as a swing compressor.

[0119] In addition, in the first and fourth embodiments, a compressor with a single cylinder structure and one outlet pipe is described, in the second and fifth embodiments, a compressor with a double cylinder structure and two outlet pipes is described, and in the third embodiment, a compressor with a triple cylinder structure and three outlet pipes is described, but the number of cylinders and the number of outlet pipes may be different. For example, the present disclosure may also be applied to a compressor with a double cylinder structure and one outlet pipe. In addition, the number of outlet pipes may be four or more. In addition, the shape of the cross section of the outlet pipe and the through hole is not limited to a perfect circle, and may be, for example, an ellipse.

[0120] Although specific embodiments of the present disclosure have been described, the present disclosure is not limited to the above-described first to sixth embodiments, and can be implemented with various modifications within the scope of the present disclosure.

[0121] Description of symbols

[0122] 1: Compressor body shell

[0123] 2: Compression mechanism

[0124] 3: Motor

[0125] 10: Liquid reservoir

[0126] 10a: Flat surface

[0127] 10b: Curved surface

[0128] 11, 11A, 11B, 11C: outlet pipe

[0129] 11a, 11Aa, 11Ba: Oil return hole

[0130] 21, 22, 23: Through holes

[0131] A: Point

[0132] CMP: Compressor

[0133] O1: Central axis of the reservoir

[0134] O2: The center axis of the compressor housing

[0135] Ox1, Ox4: Center

[0136] Ox2, Ox3, Ox5: Center of gravity

[0137] RC: Refrigerant circuit

[0138] VL: imaginary straight line

[0139] VC: Imaginary Circle

Claims

1. A compressor (CMP), comprising: A compressor main body casing (1); A compression mechanism (2) disposed in the compressor main body casing (1); and The liquid accumulator (10) is arranged outside the compressor main body casing (1) and is connected to the compression mechanism (2) via the outlet pipe (11, 11A, 11B, 11C), and has through holes (21, 22, 23) for the outlet pipe (11, 11A, 11B, 11C) to be inserted through. When viewed from above in the direction of the central axis of the above-mentioned liquid reservoir (10), the center (Ox1, Ox4) or the center of gravity (Ox2, Ox3, Ox5) of the portion of the above-mentioned outlet pipe (11, 11A, 11B, 11C) inserted into the above-mentioned through hole (21, 22, 23) is located closer to the compressor main body casing (1) than the central axis (O1) of the above-mentioned liquid reservoir (10).

2. The compressor (CMP) according to claim 1, wherein When the above-mentioned top view is observed, when an imaginary straight line (VL) and an imaginary circle (VC) are assumed, the above-mentioned center (Ox1, Ox4) or the center of gravity (Ox2, Ox3, Ox5) is located within the above-mentioned imaginary circle (VC), wherein the above-mentioned imaginary straight line (VL) passes through the central axis (O2) of the above-mentioned compressor main body shell (1) and the central axis (O1) of the above-mentioned liquid reservoir (10), and the above-mentioned imaginary circle (VC) is centered at a point (A) where the above-mentioned imaginary straight line (VL) intersects with the outer peripheral surface of the above-mentioned compressor main body shell (1), and the distance from the above-mentioned point (A) to the central axis (O1) of the above-mentioned liquid reservoir (10) is a radius (r).

3. The compressor (CMP) according to claim 2, wherein: In the plan view, the center (Ox1, Ox4) or the center of gravity (Ox2, Ox3, Ox5) is located on the virtual straight line (VL).

4. The compressor (CMP) according to any one of claims 1 to 3, wherein The end portion of the liquid reservoir (10) in the direction of the central axis has a flat surface portion (10a) along the radial direction of the liquid reservoir (10). The through holes (21, 22, 23) are provided in the planar portion (10a).

5. The compressor (CMP) according to any one of claims 1 to 3, wherein The end portion of the liquid reservoir (10) in the direction of the central axis has a curved surface portion (10b) connected to the outer peripheral side surface of the liquid reservoir (10). The through holes (21, 22, 23) are provided in the curved surface portion (10b).

6. The compressor (CMP) according to any one of claims 1 to 5, wherein The outlet pipe (11, 11A, 11B, 11C) has an oil return hole (11a, 11Aa, 11Ba) which communicates with the space in the liquid reservoir (10) and is located near the bottom of the liquid reservoir (10).

7. A refrigeration device comprising the compressor (CMP) according to any one of claims 1 to 6.

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