Compressor and refrigeration cycle device

Abstract

This compressor comprises: a sealed container that constitutes an outline so as to extend in a first direction; a stator that is provided inside the sealed container; a motor mechanism that has a rotor that rotates by means of the stator; a shaft that is provided to the motor mechanism and transmits the rotational force of the motor mechanism; a compression mechanism that rotates with the rotation of the shaft and compresses a refrigerant; an intake pipe that allows the refrigerant to flow into the compression mechanism; a suction muffler that is connected to the intake pipe and limits noise generated by the refrigerant flowing in the intake pipe; and a metal fitting that connects the suction muffler and the sealed container. The metal fitting is joined to the sealed container, is provided at a position that is shifted in the first direction with respect to the stator, and has a base part that has a container-side joining part that protrudes toward the sealed container, extension parts that extend from both ends of the base part, and an abutting part that is provided to the distal end of the extension parts and abuts the suction muffler.

Description

[Technical Field]

[0001] The present disclosure relates to a compressor and a refrigeration cycle device that include a fixing bracket that connects a sealed container and a suction muffler. [Background technology]

[0002] Conventionally, compressors have been known that include a suction muffler connected to a suction pipe to suppress noise generated by the refrigerant flowing through the suction pipe. In this case, the suction muffler is fixed to a sealed container using a fixing bracket. Patent Document 1 discloses a compressor that includes a compression mechanism that compresses gaseous refrigerant in a sealed container and an electric mechanism that drives the compression mechanism. In Patent Document 1, the sealed container and the suction muffler are fixed via a fixing bracket for the suction muffler. In the compressor of Patent Document 1, the sealed container and the fixing bracket are joined by projection welding, and the fixing bracket and the suction muffler are joined by arc welding, thereby fixing the sealed container and the suction muffler. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020 / 202493 Summary of the Invention [Problem to be solved by the invention]

[0004] When vibrations from the compression mechanism and the electric mechanism are transmitted to the suction muffler, the vibrations may be transmitted to the refrigerant piping, causing abnormal noise due to the vibrations in the refrigerant piping. It is desirable to suppress the generation of such abnormal noise even in compressors such as those described in Patent Document 1.

[0005] The present disclosure is devised to solve the above-mentioned problems, and aims to provide a compressor and a refrigeration cycle device that suppress the generation of abnormal noise. [Means for solving the problem]

[0006] A compressor according to the present disclosure includes: a sealed container forming an outer shell extending in a first direction; an electric mechanism having a stator provided inside the sealed container and a rotor rotated by the stator; a shaft attached to the electric mechanism and transmitting the rotational force of the electric mechanism; a compression mechanism that rotates with the rotation of the shaft to compress a refrigerant; a suction pipe through which refrigerant flows into the compression mechanism; a suction muffler connected to the suction pipe and suppressing noise generated from the refrigerant flowing in the suction pipe; and a fixing bracket connecting the suction muffler and the sealed container, wherein the fixing bracket is joined to the sealed container and is disposed at a position offset from the stator in the first direction and has a base portion having a container-side joint portion that protrudes toward the sealed container, extension portions extending from both ends of the base portion, and a contact portion provided at the tip of the extension portion and contacting the suction muffler, and a concave rib is formed on the fixing bracket from the contact portion to the extension portion, and the rib is disposed at a position offset from the stator in the first direction. The base portion faces the sealed container and is provided at a position where it partially overlaps with the stator in the first direction, and the rib is provided at a position where it does not overlap with the stator in the first direction. . [Effects of the Invention]

[0007] According to the present disclosure, the vessel-side joint of the base portion of the fixing bracket is positioned offset from the stator in the first direction. Therefore, even if vibrations generated by the stator are transmitted to the sealed vessel, the vibrations transmitted to the sealed vessel are less likely to be transmitted to the suction muffler via the fixing bracket. This prevents the vibrations from being transmitted to the refrigerant piping. Therefore, the generation of abnormal noise can be suppressed. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a circuit diagram showing a refrigeration cycle device according to a first embodiment of the present invention. [Figure 2] 1 is a cross-sectional view showing a compressor according to a first embodiment of the present invention. [Figure 3] 1 is a top view showing a fixing bracket according to the first embodiment. FIG. [Figure 4] 1 is a side view showing a fixing bracket according to the first embodiment. [Figure 5] 1 is a side view showing a compressor according to a first embodiment of the present invention. [Figure 6] 1 is a side view showing a compressor according to a first embodiment of the present invention. [Figure 7] FIG. 10 is a side view showing a fixing bracket according to the second embodiment. [Figure 8] FIG. 10 is a side view showing a compressor according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of a compressor and a refrigeration cycle device according to the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the embodiments described below. Furthermore, in the following drawings, including FIG. 1, the dimensional relationships between components may differ from the actual ones. Furthermore, in the following description, terms indicating directions are used as appropriate to facilitate understanding of the present disclosure, but these terms are used for the purpose of explaining the present disclosure and do not limit the present disclosure. Examples of terms indicating directions include "up," "down," "right," "left," "front," and "rear."

[0010] Embodiment 1 [Configuration of refrigeration cycle device 12] Fig. 1 is a circuit diagram showing a refrigeration cycle apparatus 12 according to the present embodiment 1. The refrigeration cycle apparatus 12 is, for example, a hot water supply apparatus, and as shown in Fig. 1, includes a heat source machine 17 and a utilization device 18. The heat source machine 17 includes, for example, a compressor 1, a first heat exchanger 13, an expansion section 15, and a second heat exchanger 16.

[0011] The compressor 1, the first heat exchanger 13, the expansion section 15, and the second heat exchanger 16 are connected by a refrigerant pipe 12b to form a refrigerant circuit 12a. The compressor 1 draws in a refrigerant in a low-temperature, low-pressure state, compresses the drawn refrigerant, and discharges it as a refrigerant in a high-temperature, high-pressure state. The compressor 1 is, for example, a single rotary compressor 1 whose capacity is controllable. The first heat exchanger 13 exchanges heat between the refrigerant and water flowing in the water circuit 14a, for example, and functions as a gas cooler. The expansion section 15 is a pressure reducing valve or expansion valve that reduces the pressure of the refrigerant to expand it. The expansion section 15 is, for example, an electronic expansion valve whose opening is adjustable. The second heat exchanger 16 exchanges heat between the air and the refrigerant, for example, and functions as an evaporator.

[0012] The second heat exchanger 16 and the utilization equipment 18 are connected by a water pipe 14b to form a water circuit 14a. The second heat exchanger 16 exchanges heat between the refrigerant flowing in the refrigerant circuit 12a and water, for example. The utilization equipment 18 supplies hot water by utilizing the heat generated in the heat source machine 17.

[0013] [Hot water supply operation of refrigeration cycle device 12] Next, the hot water supply operation will be described. In the hot water supply operation, the refrigerant drawn into the compressor 1 is compressed by the compressor 1 and discharged in a high-temperature, high-pressure gas state. The high-temperature, high-pressure gas refrigerant discharged from the compressor 1 flows into the second heat exchanger 16, which functions as a gas cooler, where it exchanges heat with water flowing in the water circuit 14a and condenses to become a liquid. At this time, the water flowing in the water circuit 14a is warmed. The condensed liquid refrigerant flows into the expansion section 15, where it expands and is decompressed to become a low-temperature, low-pressure, two-phase gas-liquid refrigerant. The two-phase gas-liquid refrigerant then flows into the first heat exchanger 13, which functions as an evaporator, where it exchanges heat with air and evaporates to become a gas. The evaporated low-temperature, low-pressure gas refrigerant is drawn into the compressor 1.

[0014] The refrigeration cycle device 12 is not limited to a hot water supply device, but may be a floor heating device, an air conditioner, etc. When the refrigeration cycle device 12 is an air conditioner, it can perform both cooling operation and heating operation if it has a flow path switching device.

[0015] [Configuration of Compressor 1] Fig. 2 is a cross-sectional view showing the compressor 1 according to the first embodiment. Next, the compressor 1 will be described in detail. As shown in Fig. 2, the compressor 1 is a rolling piston type single rotary compressor, and is a fluid machine that draws low-pressure gaseous refrigerant into the compressor and discharges it as high-pressure gaseous refrigerant. The housing of the compressor 1 is formed by a cylindrically shaped iron sealed container 3.

[0016] The sealed container 3 has an outer shell that extends in a first direction Z. Hereinafter, the vertical direction will be referred to as the first direction Z. The sealed container 3 is composed of a hollow cylindrical body 3a, a bottom 3b having a U-shaped cross section, and a lid 3c having an inverted U-shaped cross section, and the outer surfaces of the openings of the bottom 3b and the lid 3c are fixed to the inner surface of the opening of the body 3a. The fixed portion between the body 3a and the bottom 3b and the fixed portion between the body 3a and the lid 3c are joined by, for example, arc welding or resistance welding. Refrigerating machine oil 90 is stored in the bottom 3b of the sealed container 3.

[0017] A suction muffler 2 is disposed on the outside of the body 3a of the sealed container 3. The suction muffler 2 is fixed to the body 3a of the sealed container 3 via fixing brackets 4 disposed on the outer surface of the sealed container 3. The suction muffler 2 has an upper container 2a and a lower container 2b and has a cylindrical shape. The upper container 2a and the lower container 2b are fixed together by welding, for example. An intake pipe 5 is fixed to the top of the upper container 2a that constitutes the suction muffler 2, passing through the upper container 2a.

[0018] The suction pipe 5 is a refrigerant pipe 12b that allows low-pressure gaseous refrigerant or highly dry two-phase refrigerant to flow into the suction muffler 2. One end of the inlet pipe 5a penetrates the bottom 3b of the lower container 2b that constitutes the suction muffler 2 and is fixed thereto by welding or the like, and the other end of the inlet pipe 5a penetrates the side surface of the body 3a of the sealed container 3 and is fixed thereto.

[0019] The suction muffler 2 also functions as an accumulator, having a refrigerant storage function for storing excess refrigerant and a gas-liquid separation function for separating the refrigerant into gas and liquid by retaining the liquid refrigerant that temporarily occurs when the operating state changes. The suction muffler 2 also functions as a silencer that reduces or eliminates noise generated by the refrigerant flowing in from the suction piping 5. The gas-liquid separation function of the suction muffler 2 prevents a large amount of liquid refrigerant from flowing into the sealed container 3, which would otherwise cause liquid compression in the compressor 1. The detailed structure of the fixing bracket 4 that connects the sealed container 3 and the suction muffler 2 will be described later.

[0020] The inlet pipe 5a is a refrigerant pipe 12b that draws low-pressure gaseous refrigerant from the suction muffler 2 into the sealed container 3. A fixing member 5c is arranged in an intake hole 5b formed in the body part 3a of the sealed container 3, and the inlet pipe 5a is fixed to the body part 3a of the sealed container 3 via the fixing member 5c arranged in the intake hole 5b.

[0021] One end of the connecting pipe 6a is inserted into the suction hole 5b and communicates with the inside of the sealed container 3. The inlet pipe 5a is inserted into the other end of the fixing member 5c. The fixing member 5c is joined to the suction hole 5b and is joined to the outer surface of the connecting pipe 6a and the sealed container 3, sealing the gap between the inlet pipe 5a and the suction hole 5b. In the compressor 1, the fixing member 5c ensures airtightness inside the sealed container 3.

[0022] A discharge pipe 6 is fixed to the upper surface of the lid 3c of the sealed container 3, penetrating through the lid. The discharge pipe 6 is a refrigerant pipe 12b that discharges high-pressure gaseous refrigerant to the outside of the sealed container 3. The fixed portion between the discharge pipe 6 and the lid 3c is joined by, for example, brazing or resistance welding. Furthermore, a glass terminal 60 is arranged on the upper surface of the lid 3c of the sealed container 3. The glass terminal 60 provides an interface for connection to an external power supply (not shown). The external power supply is a power supply device that supplies power to the compressor 1, and a general commercial AC power supply with an AC frequency of 50 Hz or 60 Hz, or an inverter power supply that can change the AC frequency, is used.

[0023] The sealed container 3 accommodates an electric motor mechanism 7, a shaft 70, and a compression mechanism 10. The electric motor mechanism 7 is arranged above the position of the fixed member 5c in the sealed container 3. The shaft 70 is arranged in the center of the sealed container 3 between the electric motor mechanism 7 and the compression mechanism 10, and is provided so as to extend in the vertical direction between the electric motor mechanism 7 and the compression mechanism 10. The compression mechanism 10 is arranged so that the interior of the compression mechanism 10 communicates with the inlet pipe 5a. That is, inside the sealed container 3, the electric motor mechanism 7 is arranged above the compression mechanism 10. Furthermore, the hollow space inside the sealed container 3 is filled with high-pressure gaseous refrigerant compressed by the compression mechanism 10. That is, the compressor 1 is a high-pressure shell type.

[0024] The electric motor mechanism 7 is configured as a motor that generates a rotational driving force in a shaft 70 using electric power supplied from an external power source and transmits the rotational driving force to the compression mechanism 10 via the shaft 70. The electric motor mechanism 7 includes a stator 8 having a hollow cylindrical appearance when viewed from above, and a cylindrical rotor 9 that is rotatably disposed inside the inner surface of the stator 8. The stator 8 is fixed to the inner surface of the body portion 3a of the sealed container 3 by shrink fitting or the like, and is connected to a glass terminal 60 via a conductor 61. The electric motor mechanism 7 can rotate the rotor 9 inside the inner surface of the stator 8 by supplying electric power from the external power source to a wound coil that constitutes the stator 8 via the conductor 61. In the compressor 1, for example, a DC brushless motor or the like is used as the electric motor mechanism 7.

[0025] A shaft 70 is fixed to the center of the rotor 9, passing through the rotor 9. The shaft 70 fixes the rotor 9 at a fixing surface 70a, which is a part of the outer surface of the shaft 70, and is a rotating shaft that transmits the rotational force of the rotor 9 to the compression mechanism 10. The shaft 70 is provided so as to extend in the vertical direction from the fixing surface 70a, i.e., in the direction of the lid 3c of the sealed container 3 and the direction of the bottom 3b of the sealed container 3.

[0026] The shaft 70 is located below the fixed surface 70a and has an eccentric portion 71 that is disposed inside the compression mechanism 10 at a position corresponding to the cylinder 73. A substantially cylindrical piston 72 is disposed on the outer periphery of the eccentric portion 71 and is rotatably attached along the outer surface of the eccentric portion 71. When the shaft 70 is rotated by the electric mechanism 7, the piston 72 rotates inside the cylinder 73 along its inner circumferential surface.

[0027] Additionally, the compressor 1 may have a centrifugal pump (not shown) disposed at the lower end of the shaft 70. The centrifugal pump can suck up refrigerating machine oil 90 stored in the bottom 3b of the sealed container 3. Note that, as the refrigerating machine oil 90, for example, mineral oil-based, alkylbenzene-based, polyalkylene glycol-based, polyvinyl ether-based, polyol ester-based lubricating oil or the like is used.

[0028] The compression mechanism 10 compresses the low-pressure gaseous refrigerant drawn into the low-pressure space of the sealed container 3 from the inlet pipe 5a using the rotational driving force supplied from the electric mechanism 7, into high-pressure gaseous refrigerant, and discharges the compressed high-pressure gaseous refrigerant above the compression mechanism 10.

[0029] The compression mechanism 10 includes a hollow cylindrical cylinder 73. The outer surface of the cylinder 73 is fixed to the inner surface of the body portion 3a of the sealed container 3 by arc welding such as arc spot welding or shrink fitting. An eccentric portion 71 of a shaft 70 and a piston 72 are housed in a hollow space surrounded by the inner surface of the cylinder 73. The cylinder 73 is configured so that the eccentric portion 71 of the shaft 70 and the piston 72 can rotate eccentrically in the hollow portion of the cylinder 73 when the shaft 70 rotates. A compression chamber is formed in the cylinder 73 when one end of a vane 74, which reciprocates radially within a groove formed in the cylinder 73, abuts against the muffler outer peripheral wall 2c of the piston 72.

[0030] The openings at both axial ends of the cylinder 73 are closed by an upper bearing 75 and a lower bearing 76. That is, the upper bearing 75 is disposed above the cylinder 73, and the lower bearing 76 is disposed below the cylinder 73. The shaft 70 passes through the upper bearing 75, the cylinder 73, and the lower bearing 76. The upper bearing 75 and the lower bearing 76 are plain bearings that slidably support the shaft 70, and also rotatably support the shaft 70. The upper bearing 75, the cylinder 73, and the lower bearing 76 are stacked in this order, and the upper and lower openings of the hollow portion of the cylinder 73 are closed by the upper bearing 75 and the lower bearing 76, thereby ensuring airtightness within the hollow portion. The upper bearing 75 and the lower bearing 76 are fixed to the upper and lower sides of the cylinder 73, for example, by bolts or the like.

[0031] In the compression mechanism 10, a sealable space surrounded by the piston 72, the cylinder 73, the vane 74, the upper bearing 75, and the lower bearing 76 forms a compression chamber that compresses the low-pressure gaseous refrigerant sucked from the inlet pipe 5a.

[0032] In the first embodiment, the compressor 1 is configured as a vertical compressor, but it may also be configured as a horizontal compressor. Also, in the first embodiment, the compressor 1 is configured as a rolling piston rotary compressor, but it may also be configured as a swing vane swing compressor, or as a screw compressor or a scroll compressor. Also, in the first embodiment, the compressor 1 is configured as a single rotary rotary compressor, but it may also be configured as a twin rotary rotary compressor. Also, in the first embodiment, the compressor 1 is configured as a single-stage compressor and has only one compression mechanism 10, but it may also be configured as a multi-stage compressor and has a plurality of compression mechanisms 10 to sequentially compress the refrigerant.

[0033] [Compressor 1 operation] Next, the operation of the compressor 1 of the first embodiment will be described. When the shaft 70 is rotated by the driving of the electric mechanism 7, the eccentric portion 71 and the piston 72 housed inside the cylinder 73 rotate eccentrically together with the shaft 70. The eccentric rotation of the eccentric portion 71 and the piston 72 causes the piston 72 to move while keeping the outer circumferential surface of the piston 72 in contact with the inner surface of the cylinder 73 in the hollow portion of the cylinder 73. The vane 74 arranged in the cylinder 73 moves in the radial direction of the cylinder 73 in conjunction with the eccentric rotation of the piston 72.

[0034] The low-pressure gaseous refrigerant that has passed through the suction muffler 2 and flowed into the compression mechanism 10 from the inlet pipe 5a flows into the compression chamber, which is an enclosed space surrounded by the piston 72, the cylinder 73, the vane 74, the upper bearing 75, and the lower bearing 76. The low-pressure gaseous refrigerant that has flowed into the compression chamber is compressed to high-pressure gaseous refrigerant as the volume of the compression chamber decreases due to the eccentric rotation of the piston 72. The high-pressure gaseous refrigerant is discharged into the hollow space inside the sealed container 3 through a discharge port (not shown) provided in the upper bearing 75. The high-pressure gaseous refrigerant discharged into the hollow space inside the sealed container 3 passes through, for example, a gap between the stator 8 and the rotor 9 of the electric mechanism 7, and is discharged out of the sealed container 3 through the discharge pipe 6.

[0035] [Fixing bracket 4 details] Fig. 3 is a top view showing the fixing bracket 4 according to the first embodiment, and is a schematic diagram of the fixing bracket 4 fixed between the sealed container 3 and the suction muffler 2 in Fig. 2 as viewed from above. Fig. 4 is a side view showing the fixing bracket 4 according to the first embodiment. The fixing bracket 4 will be described in detail using Figs. 3 and 4.

[0036] The fixing bracket 4 fixes the suction muffler 2 to the sealed container 3 of the compressor 1. The fixing bracket 4 is a metal plate and is formed, for example, by press working. The fixing bracket 4 has a base portion 41, an extension portion 43, and an abutment portion 42. The fixing bracket 4 is formed from a single plate material that is press worked to form the base portion 41, the abutment portion 42, the extension portion 43, and a container-side joint portion 44 and a muffler-side joint portion 45, which will be described later.

[0037] [Fundamentals 41] The base portion 41 is a portion of the fixing bracket 4 that is attached and fixed to the outer circumferential wall 3a1 of the body portion 3a of the sealed container 3 of the compressor 1. The base portion 41 is a rectangular plate-like portion when viewed from the front, and is a portion that is formed in a curved shape along the circumferential direction of the outer circumferential wall 3a1 of the sealed container 3 when viewed from above. The plate-shaped base portion 41 has a first opposing surface portion 41a and a second opposing surface portion 41b that form the front and back surfaces of the wall that forms the base portion 41. The first opposing surface portion 41a forms the surface of the compressor 1 that faces the sealed container 3. The second opposing surface portion 41b forms the surface of the compressor 1 that faces the suction muffler 2.

[0038] [Container side joint 44] The base portion 41 is provided with a vessel-side joint 44 for projection welding used to fasten the base portion 41 to the sealed vessel 3. The vessel-side joint 44 is a hemispherical protrusion. As shown in FIG. 4, the vessel-side joint 44 is formed to bulge from the first opposing surface portion 41a that faces the sealed vessel 3. The vessel-side joint 44 has four protrusions. The first vessel-side joint 44a, the second vessel-side joint 44b, the third vessel-side joint 44c, and the fourth vessel-side joint 44d are arranged two by two in the vertical direction and two by two in the circumferential direction, and are arranged so as to be located at each of the four corners of an imaginary rectangle. However, the number of vessel-side joints 44 is not limited to four.

[0039] [Extension section 43] The extension portion 43 is a portion of the fixing bracket 4 that connects the base portion 41 and the abutment portion 42. The extension portion 43 is provided so as to rise from both end portions of the base portion 41 in the circumferential direction of the sealed container 3. The extension portion 43 is provided in the compressor 1 so as to extend between the sealed container 3 and the suction muffler 2. The extension portion 43 is bent from the end portion of the base portion 41 and formed integrally with the base portion 41. The extension portion 43 is also formed as a plate-like member that is continuous with the base portion 41.

[0040] The extension portion 43 has a first extension portion 43a and a second extension portion 43b. The first extension portion 43a is formed to extend from a first end portion 41c, which is one end portion in the direction in which the base portion 41 extends, in the circumferential direction of the sealed container 3. The second extension portion 43b is formed to extend from a second end portion 41d, which is the other end portion in the direction in which the base portion 41 extends, in the circumferential direction of the sealed container 3. The first extension portion 43a and the base portion 41 are formed in an L-shape when viewed from above, and the second extension portion 43b and the base portion 41 are formed in an inverted L-shape when viewed from above.

[0041] As shown in FIG. 4 , the first extension portion 43a and the second extension portion 43b are formed so that the distance between them increases as they move from the base portion 41 toward the tip end. Note that the first extension portion 43a and the second extension portion 43b are not limited to being formed so that the distance between them increases as they move from the base portion 41 toward the tip end. For example, the first extension portion 43a and the second extension portion 43b may be formed so that they are parallel to each other in the direction of extension from the base portion 41. The extension portion 43 is disposed between the base portion 41 and the abutting portion 42 and serves to connect the base portion 41 and the abutting portion 42. That is, the extension portion 43 has the base portion 41 on one end side and the abutting portion 42 on the other end side in the direction of extension from the base portion 41.

[0042] [Contact part 42] The abutment portion 42 is a portion of the fixing bracket 4 that is attached and fixed to the muffler outer peripheral wall 2c of the cylindrical suction muffler 2. In top view, the abutment portion 42 is provided at the end portion on the tip side of the extension portion 43 that extends upright from the base portion 41. The abutment portion 42 is bent from the end of the extension portion 43 and formed integrally with the extension portion 43. The abutment portion 42 is also formed as a plate-like member that is continuous with the extension portion 43. The abutment portion 42 is a rectangular plate-like member when viewed from the front from the suction muffler 2 side, and is formed in a curved shape that follows the circumferential direction of the muffler outer peripheral wall 2c of the suction muffler 2 when viewed from above.

[0043] The abutting portion 42 is fixed to the muffler outer peripheral wall 2c of the suction muffler 2 by projection welding. It is desirable that the third opposing surface portion 42c and the fourth opposing surface portion 42d of the abutting portion 42, which face the muffler outer peripheral wall 2c of the suction muffler 2, are in close contact with the muffler outer peripheral wall 2c, but even if a gap is formed between the abutting portion 42 and the muffler outer peripheral wall 2c, the gap is 1 mm or less. The third opposing surface portion 42c and the fourth opposing surface portion 42d will be described later.

[0044] The abutment portion 42 has a first abutment portion 42a and a second abutment portion 42b arranged on either side of the base portion 41. The first abutment portion 42a is formed to extend from a third end 43c, which is the tip end of the first extension portion 43a in the extension direction. The second abutment portion 42b is formed to extend from a fourth end 43d, which is the tip end of the second extension portion 43b in the extension direction. The first abutment portion 42a and the first extension portion 43a are formed to have an inverted L-shape in top view, and the second abutment portion 42b and the second extension portion 43b are also formed to have an L-shape in top view. As shown in FIG. 4, the first abutment portion 42a and the second abutment portion 42b are formed so that the distance between them increases from the extension portion 43 on the base portion 41 side toward the tip end. The first contact portion 42a and the second contact portion 42b are attached to the muffler outer peripheral wall 2c of the suction muffler 2 so as to face the curved surface of the semi-cylindrical portion on the sealed container 3 side.

[0045] [Muffler side joint 45] The abutting portion 42 is provided with a muffler-side joint 45 for arc welding used to fix the abutting portion 42 to the suction muffler 2. The muffler-side joint 45 is a linear protrusion provided between the extension portion 43 and the tip of the abutting portion 42. The muffler-side joint 45 is formed to extend perpendicular to a first direction Z, which is the axial direction of the suction muffler 2. In addition, the muffler-side joint 45 is formed in a curved shape so as to bulge toward the suction muffler 2 in a cross section perpendicular to the extending direction. The extending direction of the muffler-side joint 45 is formed so as to be in a twisted position perpendicular to the first direction Z, which is the axial direction of the suction muffler 2.

[0046] The muffler-side joint 45 is formed on the abutment portion 42 by, for example, press working or the like. Two muffler-side joints 45 are formed on the fixing bracket 4: a first muffler-side joint 45a and a second muffler-side joint 45b. The first muffler-side joint 45a is formed at the first abutment portion 42a so as to bulge from a third opposing surface portion 42c that faces the muffler outer peripheral wall 2c of the suction muffler 2. The first abutment portion 42a has a third opposing surface portion 42c that faces the muffler outer peripheral wall 2c of the suction muffler 2 and is formed in a curved shape that follows the circumferential direction of the muffler outer peripheral wall 2c. At least one protruding first muffler-side joint 45a is formed on the third opposing surface portion 42c, which is used for arc welding to the muffler outer peripheral wall 2c.

[0047] The second muffler-side joint portion 45b is formed at the second abutting portion 42b so as to bulge from a fourth opposing surface portion 42d that faces the muffler outer peripheral wall 2c of the suction muffler 2. The second abutting portion 42b has a fourth opposing surface portion 42d that faces the muffler outer peripheral wall 2c of the suction muffler 2 and is formed in a curved shape that follows the circumferential direction of the muffler outer peripheral wall 2c. At least one protruding second muffler-side joint portion 45b is formed on the fourth opposing surface portion 42d and is used for arc welding to the muffler outer peripheral wall 2c. The muffler-side joint portion 45 is formed so that the height that it protrudes from the third opposing surface portion 42c and the fourth opposing surface portion 42d is less than the plate thickness of the abutting portion 42.

[0048] However, the number of muffler-side joints 45 is not limited to two. Two or more muffler-side joints 45 may be formed on each of the first contact portion 42a and the second contact portion 42b.

[0049] [Position of vessel side joint 44] FIG. 5 is a side view showing the compressor 1 according to the first embodiment. Next, the position of the container-side joint 44 will be described. As shown in FIG. 5, the container-side joint 44 is provided at a position offset from the stator 8 in the first direction Z. That is, the container-side joint 44 is provided at a position that does not overlap with the stator 8 in the first direction Z. Furthermore, the base portion 41 is provided at a position that partially overlaps with the stator 8 in the first direction Z. Specifically, only the lower end of the base portion 41, where the container-side joint 44 is not provided, overlaps with the upper end of the stator 8.

[0050] [Position of muffler side joint 45] Fig. 6 is a side view showing the compressor 1 according to the first embodiment. Next, the position of the muffler-side joint 45 will be described. As shown in Fig. 6, the muffler-side joint 45 is provided at a position offset from the stator 8 in the first direction Z. In other words, the muffler-side joint 45 is provided at a position not overlapping with the stator 8 in the first direction Z.

[0051] According to the first embodiment, the container-side joint 44 of the base portion 41 of the fixing bracket 4 is provided at a position offset from the stator 8 in the first direction Z. Therefore, even if vibrations generated by the stator 8 are propagated to the sealed container 3, the vibrations propagated to the sealed container 3 are unlikely to be propagated to the suction muffler 2 via the fixing bracket 4. This makes it possible to suppress propagation of vibrations to the refrigerant pipes 12b. Therefore, it is possible to suppress the generation of abnormal noise. As described above, in the first embodiment, the container-side joint 44 is provided at a position that does not overlap with the stator 8 in the first direction Z. Therefore, compared to a case in which the container-side joint 44 is provided at a position overlapping with the stator 8, it is possible to suppress propagation of vibrations generated by the stator 8 to the suction muffler 2.

[0052] Furthermore, the base portion 41 faces the sealed container 3 and is located at a position that partially overlaps the stator 8 in the first direction Z. This reduces the space required to arrange the components that make up the compressor 1 in the first direction Z. This also reduces the length of the compressor 1 in the first direction Z. Even if the base portion 41 partially overlaps the stator 8, the container-side joint 44 is located at a position that does not overlap the stator 8 in the first direction Z, thereby preventing vibrations generated by the stator 8 from propagating to the suction muffler 2.

[0053] The contact portion 42 is joined to the suction muffler 2, is positioned offset from the stator 8 in the first direction Z, and has a muffler-side joint portion 45 that protrudes toward the suction muffler 2. As a result, even if vibrations generated by the stator 8 are propagated to the sealed container 3, the vibrations propagated to the sealed container 3 can be further prevented from propagating to the suction muffler 2 from the base portion 41, extension portion 43, and contact portion 42 of the fixing bracket 4 and the welded portions that are their bonding points.

[0054] Conventionally, compressors have been known in which the sealed container and suction muffler are fixed via a suction muffler mounting bracket. In this case, when aluminum wire is used for the stator conductor of the electric mechanism, the eigenvalue decreases and vibration increases compared to when copper wire is used for the conductor. This raises the risk of vibration being transmitted to the suction muffler via the sealed container and the mounting bracket. Furthermore, when carbon dioxide is used as the refrigerant, the operating pressure of the carbon dioxide refrigerant is approximately three times that of common air-conditioning refrigerants such as R32 or R410A. This increases torque fluctuations in the compression mechanism, potentially transmitting the generated vibrations to the suction muffler via the sealed container and the mounting bracket. This may result in the vibrations propagating to the suction muffler and then to the suction piping, potentially causing abnormal noise and other problems.

[0055] In contrast, in the present embodiment 1, the container-side joint 44 is provided at a position offset from the stator 8 in the first direction Z. Therefore, even if aluminum wire is used for the conductor of the stator 8 of the electric mechanism 7, it is possible to suppress the propagation of vibration to the suction muffler 2. Furthermore, even if carbon dioxide is used as the refrigerant and the operating pressure increases, it is possible to suppress the propagation of vibration to the suction muffler 2.

[0056] Embodiment 2 7 is a side view showing a fixing bracket 4 according to the second embodiment. The second embodiment differs from the first embodiment in that a rib 11 is formed on the fixing bracket 4. In the second embodiment, parts that are common to the first embodiment are given the same reference numerals and their description will be omitted, and the description will focus on the differences from the first embodiment.

[0057] [Rib 11] As shown in FIG. 7, the fixing bracket 4 has a concave rib 11 formed from the abutment portion 42 to the extension portion 43. The rib 11 has a first rib 11a provided on the first extension portion 43a side and a second rib 11b provided on the second extension portion 43b side. The rib 11 is provided to ensure the strength of the fixing bracket 4 itself and is rectangular. The rib 11 has two sides formed from a corner on the base side that extend away from each other toward the abutment portion 42 side, and two sides formed from both corners that extend toward the abutment portion 42 side so as to approach each other. The portion where the two sides extending toward the abutment portion 42 side overlap is the corner on the abutment portion 42 side.

[0058] [Rib 11 position] Fig. 8 is a side view showing the compressor 1 according to the embodiment 2. As shown in Fig. 8, the rib 11 is provided at a position offset from the stator 8 in the first direction Z. In other words, the rib 11 is provided at a position not overlapping with the stator 8 in the first direction Z.

[0059] [Container side joint 44] The container-side joint 44 has an upper joint 50a and an equivalent joint 50b. At least a portion of the upper joint 50a is located above the rib 11 in the first direction Z and corresponds to the first container-side joint 44a and the second container-side joint 44b. The lower joints are located at the same position as the rib 11 in the first direction Z and correspond to the third container-side joint 44c and the fourth container-side joint 44d. The distance A between the first container-side joint 44a and the second container-side joint 44b is wider than the distance B between the third container-side joint 44c and the fourth container-side joint 44d. Thus, the distance A between the upper joints 50a is wider than the distance B between the lower joints.

[0060] According to the second embodiment, the fixing metal fitting 4 is formed with a concave rib 11 extending from the contact portion 42 to the extension portion 43, and the rib 11 is provided at a position offset from the stator 8 in the first direction Z. Therefore, even if vibrations generated from the stator 8 are propagated to the sealed container 3, the vibrations are unlikely to propagate from the sealed container 3 to the rib 11. This makes it possible to suppress the vibrations from propagating to the suction muffler 2. In this way, in the second embodiment, the rib 11 is provided at a position where it does not overlap with the stator 8 in the first direction Z. Therefore, compared to when the rib 11 is provided at a position where it overlaps with the stator 8, it is possible to suppress the vibrations generated by the stator 8 from propagating to the suction muffler 2.

[0061] Furthermore, the container-side joint 44 has upper joints 50a provided above the ribs 11 in the first direction Z, and equivalent joints 50b provided at the same positions as the ribs 11 in the first direction Z. The spacing A between the multiple upper joints 50a is wider than the spacing B between the multiple equivalent joints 50b. If the suction muffler 2 is short, the fixing bracket 4 needs to be positioned at a low position on the sealed container 3.

[0062] In the second embodiment, the distance A between the multiple upper joints 50a is wider than the distance B between the multiple equivalent joints 50b. Therefore, the fixing metal fitting 4 can be fixed to the sealed container 3 at a lower position compared to when welding is performed at a position that does not overlap the rib 11 in the first direction Z, for example. Furthermore, even if all of the equivalent joints 50b are provided at positions that overlap the rib 11 in the first direction Z, the fixing metal fitting 4 and the sealed container 3 can be suitably fixed. Furthermore, the propagation of vibration can be suppressed.

[0063] The configurations shown in the above embodiments are merely examples, and may be combined with other known technologies, and parts of the configurations may be omitted or modified without departing from the spirit of the invention. [Explanation of symbols]

[0064] REFRIGERATION CYCLE DEVICE, 12a REFRIGERATION CYCLE, 12b REFRIGERATION PIPE, 12b REFRIGERATION PIPE, 13 REFRIGERATION CYCLE, 14a REFRIGERATION CYCLE, 14b REFRIGERATION CYCLE, 15 EXPANSION SECTION, 16 REFRIGERATION CYCLE, 17 REFRIGERATION CYCLE, 18 REFRIGERATION CYCLE, 41 REFRIGERATION CYCLE, 41a REFRIGERATION CYCLE, 41b REFRIGERATION CYCLE, 41c REFRIGERATION CYCLE, 41d EXPANSION SECTION, 16 REFRIGERATION CYCLE, 17 REFRIGERATION CYCLE, 18 ... Second end, 42 abutment portion, 42a first abutment portion, 42b second abutment portion, 42c third opposing surface portion, 42d fourth opposing surface portion, 43 extension portion, 43a first extension portion, 43b second extension portion, 43c third end, 43d fourth end, 44 container side joint portion, 44a first container side joint portion, 44b second container side joint portion, 44c third container side joint portion, 44d fourth container side joint portion, 45 muffler side joint portion, 45a first muffler side joint portion, 45b second muffler side joint portion, 50a upper joint portion, 50b equivalent joint portion, 60 glass terminal, 61 conducting wire, 70 shaft, 70a fixing surface, 71 eccentric portion, 72 piston, 73 cylinder, 74 vane, 75 upper bearing, 76 lower bearing, 90 Refrigerating machine oil.

Claims

1. a sealed container having an outer shell extending in a first direction; an electric mechanism having a stator provided inside the sealed container and a rotor rotated by the stator; a shaft attached to the electric mechanism and transmitting a rotational force of the electric mechanism; a compression mechanism that rotates in accordance with the rotation of the shaft to compress the refrigerant; a suction pipe through which a refrigerant flows into the compression mechanism; a suction muffler connected to the suction pipe for suppressing noise generated from the refrigerant flowing through the suction pipe; a fixing bracket that connects the suction muffler and the sealed container, The fixing bracket is a base portion joined to the sealed container, disposed at a position offset from the stator in the first direction, and having a container-side joint portion protruding toward the sealed container; extension portions extending from both ends of the base portion; a contact portion provided at a tip of the extension portion and contacting the suction muffler, The fixing bracket has: a concave rib is formed from the abutting portion to the extending portion, The rib is the rotor is provided at a position offset from the stator in the first direction, The base portion is the rotor is provided at a position facing the sealed container and partially overlapping the stator in the first direction, The rib is provided at a position where it does not overlap with the stator in the first direction. Compressor.

2. The abutment portion is a muffler-side joint portion that is joined to the suction muffler, is provided at a position offset from the stator in the first direction, and protrudes toward the suction muffler; The compressor according to claim 1.

3. The container side joint portion is an upper joint portion provided above the rib in the first direction; an equivalent joint portion provided at the same position as the rib in the first direction; The compressor according to claim 1.

4. The spacing between the plurality of upper joints is wider than the spacing between the plurality of equivalent joints The compressor according to claim 3.

5. The compressor according to claim 1 or 2, the first heat exchanger, the expansion section, and the second heat exchanger are connected by refrigerant piping to form a refrigerant circuit through which the refrigerant flows. Refrigeration cycle equipment.

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