JP2017110533A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressor capable of suppressing a noise.SOLUTION: A scroll compressor 10 includes a casing 20, a scroll compression mechanism 60, a crank shaft 80, a lower bearing 90, a lower housing 140. The lower housing 140 fixes the lower bearing 90. Herein, the lower housing 140 has a first lower housing member 141, a second lower housing member 142, and a viscoelastic body 143. The first lower housing member 141 is fixed to the inner peripheral face of the internal of a cylindrical member 21 in a sealed manner while encircling a position where the crank shaft 80 is arranged. The second lower housing member 142 fixes the lower bearing 90. The viscoelastic body 143 is arranged between the first lower housing member 141 and the second lower housing member 142 for allowing the first lower housing member 141 to support the second lower housing member 142.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a compressor.

  In recent years, vertical compressors have been used. For example, in Patent Document 1 (Japanese Patent Laid-Open No. 2005-133657) and Patent Document 2 (Japanese Patent No. 5341797), a compression mechanism is disposed above, and an upper bearing and a lower bearing are disposed above and below the motor stator, respectively. A scroll compressor is disclosed. In these scroll compressors, the upper bearing and the lower bearing are fixed to the upper housing and the lower housing, respectively. The upper housing is fixed to the cylindrical member of the casing by press fitting. The lower housing is fixed to the cylindrical member of the casing by welding via a welding pin.

  However, in the conventional compressor, the cylindrical member of the casing has a shell structure, and the mass of the compression mechanism is relatively large as compared with other constituent members. That is, the conventional compressor is a form which supports the compression mechanism with a large mass arrange | positioned upward by the shell structure with low rigidity arrange | positioned below. Therefore, in the conventional compressor, with the rotation of the drive shaft, the amplitude of the vibration mode in the cylindrical member of the casing increases, and noise may occur.

  The subject of this invention is providing the compressor which can suppress a noise.

  A compressor according to a first aspect of the present invention includes a casing, a compression mechanism, a drive shaft, a lower bearing, and a lower housing. The casing has a cylindrical member. A compression mechanism is arrange | positioned in the upper part in a cylindrical member. The drive shaft is disposed in the cylindrical member and drives the compression mechanism. The lower bearing is provided at a lower portion in the cylindrical member, and supports the drive shaft. The lower housing fixes the lower bearing. Here, the lower housing includes a first lower housing member, a second lower housing member, and a viscoelastic body. The first lower housing member is fixed in close contact with the inner peripheral surface of the cylindrical member while surrounding the position where the drive shaft is disposed. The second lower housing member fixes the lower bearing. The viscoelastic body is disposed between the first lower housing member and the second lower housing member, and supports the second lower housing member on the first lower housing member.

  In the compressor according to the first aspect, since the first lower housing member is fixed in close contact with the inner peripheral surface of the cylindrical member, the rigidity at the fixing location can be increased. Thereby, vibration mode can be suppressed and noise can be suppressed. Further, since the second lower housing member is supported by the first lower housing member via the viscous elastic body, the rotation of the second lower housing member accompanying the drive of the drive shaft can be prevented. Further, since the second lower housing member for fixing the lower bearing and the first lower housing member for fixing to the cylindrical member are separated, the degree of freedom of the fixing position of the lower bearing is increased, and the drive shaft is centered. Easy to implement.

  In the compressor according to the second aspect of the present invention, in the compressor according to the first aspect, the first lower housing member is fixed to the cylindrical member by press fitting.

  In the compressor according to the second aspect, since the first lower housing member is fixed to the cylindrical member by press-fitting, the rigidity at the fixing location can be increased.

  In the compressor according to the third aspect of the present invention, in the compressor according to the first aspect or the second aspect, the viscoelastic body integrally joins the first lower housing member and the second lower housing member.

  In the compressor according to the third aspect, since the viscoelastic body integrally joins the first lower housing member and the second lower housing member, rotation of the second lower housing member accompanying driving of the drive shaft can be prevented.

  A compressor according to a fourth aspect of the present invention is the compressor according to the first aspect or the second aspect, wherein the second lower housing member is mounted on the inner contact surface of the first lower housing member with the viscoelastic body interposed therebetween. Placed.

  In the compressor according to the fourth aspect, since the second lower housing member is placed on the inner contact surface of the first lower housing member with the viscoelastic body interposed therebetween, the centering operation with respect to the drive shaft is easily performed. it can.

  A compressor according to a fifth aspect of the present invention is the compressor according to the fourth aspect, wherein the first lower housing member has a positioning member at a predetermined position, and the second lower housing member is inserted with the positioning member. Has a positioning space.

  In the compressor according to the fifth aspect, since the first lower housing member and the second lower housing member are fixed in the positioning space via the positioning member, the rotation of the second lower housing member accompanying the drive of the drive shaft is prevented. I can stop.

  A compressor according to a sixth aspect of the present invention is the compressor according to the fourth aspect, wherein the first lower housing member has a positioning space at a predetermined position, and the second lower housing member is inserted into the positioning space. A positioning member;

  In the compressor according to the sixth aspect, since the first lower housing member and the second lower housing member are fixed in the positioning space via the positioning member, the rotation of the second lower housing member accompanying the drive of the drive shaft is prevented. I can stop.

  The compressor which concerns on the 7th viewpoint of this invention is a compressor in any one of the 4th viewpoint to the 6th viewpoint, and is further equipped with the rotation prevention member which prevents rotation of a 2nd lower housing member accompanying the drive of a drive shaft. .

  In the compressor according to the seventh aspect, since the rotation preventing member that prevents the rotation of the second lower housing member accompanying the driving of the drive shaft is provided, the rotation of the second lower housing member accompanying the driving of the driving shaft is provided. I can stop.

  A compressor according to an eighth aspect of the present invention is the compressor according to any one of the first to seventh aspects, wherein the first lower housing member and the second lower housing member have a first relative rotation position on the same axis. When in the position, they are in contact with each other, and in the second rotation position, they are not in contact with each other.

  In the compressor according to the eighth aspect, since the first lower housing member and the second lower housing member have the above-described shape, the relative rotational position is set to the first rotational position, and the first lower housing member and the second lower housing member are viewed from below so as not to contact the first lower housing member. The second lower housing member can be inserted, and after the insertion, the second lower housing member can be rotated to the second rotational position, and the rotated second lower housing member can be lowered and brought into contact with the first lower housing member to be fixed.

  In the compressor according to the present invention, since the first lower housing member is fixed in close contact with the inner peripheral surface of the cylindrical member, the rigidity at the fixing location can be increased. Thereby, vibration mode can be suppressed and noise can be suppressed. Further, since the second lower housing member is supported by the first lower housing member via the viscous elastic body, the rotation of the second lower housing member accompanying the drive of the drive shaft can be prevented. Further, since the second lower housing member for fixing the lower bearing and the first lower housing member for fixing to the cylindrical member are separated, the degree of freedom of the fixing position of the lower bearing is increased, and the drive shaft is centered. Easy to implement.

It is a refrigerant circuit figure of the air harmony device in which the scroll compressor concerning one embodiment of the present invention is used. It is a longitudinal section of a scroll compressor concerning one embodiment of the present invention. It is a figure which shows an example of a structure of the lower housing which concerns on one Embodiment of this invention. It is a figure which shows the IV-IV 'arrow of FIG. 10 is a schematic diagram showing a configuration of a lower housing according to Modification A. FIG. 10 is a schematic diagram showing a configuration of a first lower housing according to Modification C. FIG. 10 is a schematic diagram showing a configuration of a second lower housing according to Modification C. FIG. 10 is a schematic diagram showing a configuration of a first lower housing according to Modification D. FIG. 10 is a schematic diagram showing a configuration of a second lower housing according to Modification D. FIG.

  A scroll compressor 10 according to an embodiment of the present invention will be described with reference to the drawings. In addition, the scroll compressor 10 which concerns on the following embodiment is only an example of the compressor of this invention, and can be suitably changed in the range which does not deviate from the meaning of this invention.

(1) Outline of Air Conditioner Using Scroll Compressor Scroll compressor 10 according to the first embodiment of the present invention is used in air conditioner 1. FIG. 1 is a schematic diagram of an air conditioner 1 in which a scroll compressor 10 is employed. Here, the air conditioner dedicated to the cooling operation is shown, but the air conditioner in which the scroll compressor 10 is employed may be dedicated to the heating operation, and can perform both the cooling operation and the heating operation. It may be.

  The air conditioner 1 mainly includes an outdoor unit 2 having a scroll compressor 10, an indoor unit 3, a liquid refrigerant communication pipe 4 and a gas refrigerant communication pipe 5 that connect the outdoor unit 2 and the indoor unit 3. The indoor unit 3 has an indoor heat exchanger 3a. The outdoor unit 2 mainly includes an accumulator 6, a scroll compressor 10, an outdoor heat exchanger 7, and an expansion valve 8. These devices are connected by a refrigerant pipe as shown in FIG. The scroll compressor 10 compresses the refrigerant sucked through the suction pipe 23 in a compression chamber Sc described later, and discharges the compressed refrigerant from the discharge pipe 24.

(2) Detailed Description of Scroll Compressor As shown in FIG. 2, the scroll compressor 10 includes a casing 20, a scroll compression mechanism 60 including a fixed scroll 30, a drive motor 70, a crankshaft 80, and a lower bearing. 90 and a lower housing 140.

  The scroll compressor 10 will be described in detail below. In the following description, expressions such as “upper” and “lower” may be used to describe the positional relationship of the constituent members. Here, the direction of the arrow U in FIG. The reverse direction is called down. In the following description, expressions such as “vertical”, “horizontal”, “vertical”, “horizontal” may be used, but the vertical direction is defined as the vertical direction and the vertical direction.

(2-1) Casing The scroll compressor 10 has a vertically long cylindrical casing 20. The casing 20 includes a substantially cylindrical cylindrical member 21 that is open at the top and bottom, and an upper lid 22 a and a lower lid 22 b provided at the upper end and the lower end of the cylindrical member 21, respectively. The cylindrical member 21 and the upper lid 22a and the lower lid 22b are fixed by welding so as to keep airtightness.

  The casing 20 accommodates the components of the scroll compressor 10 including the scroll compression mechanism 60, the drive motor 70, the crankshaft 80, and the lower bearing 90. The scroll compression mechanism 60 is arrange | positioned at the upper part in the cylindrical member 21, as FIG. 2 shows. An oil sump space So is formed in the lower part of the casing 20. Refrigerating machine oil O for lubricating the scroll compression mechanism 60 and the like is stored in the oil reservoir space So.

  A suction pipe 23 that sucks the gas refrigerant and supplies the gas refrigerant to the scroll compression mechanism 60 is provided in the upper part of the casing 20 so as to penetrate the upper lid 22a. The lower end of the suction pipe 23 is connected to the fixed scroll 30 of the scroll compression mechanism 60 (see FIG. 2). The suction pipe 23 communicates with a compression chamber Sc of a scroll compression mechanism 60 described later. The low-pressure refrigerant in the refrigeration cycle before compression by the scroll compressor 10 flows through the suction pipe 23.

  A discharge pipe 24 through which a refrigerant discharged to the outside of the casing 20 passes is provided at an intermediate portion of the cylindrical member 21 of the casing 20. More specifically, the discharge pipe 24 is disposed so that the end of the discharge pipe 24 inside the casing 20 protrudes into a high-pressure space S <b> 1 formed below the housing 61 of the scroll compression mechanism 60. The high-pressure refrigerant in the refrigeration cycle after compression by the scroll compression mechanism 60 flows through the discharge pipe 24.

(2-2) Scroll Compression Mechanism As shown in FIG. 2, the scroll compression mechanism 60 is mainly compressed in combination with the housing 61, the fixed scroll 30 disposed above the housing 61, and the fixed scroll 30. And a movable scroll 40 that forms the chamber Sc.

(2-2-1) Fixed Scroll As shown in FIG. 2, the fixed scroll 30 has a flat fixed side end plate 32 and a spiral fixed projection protruding from the front surface (the lower surface in FIG. 2) of the fixed side end plate 32. A side wrap 33 and an outer edge portion 34 surrounding the fixed side wrap 33 are provided.

  A non-circular discharge port 32a communicating with the compression chamber Sc of the scroll compression mechanism 60 is formed in the center of the fixed side end plate 32 so as to penetrate the fixed side end plate 32 in the thickness direction. The refrigerant compressed in the compression chamber Sc is discharged from the discharge port 32a, passes through a refrigerant passage (not shown) formed in the fixed scroll 30 and the housing 61, and flows into the high-pressure space S1.

(2-2-2) Movable Scroll As shown in FIG. 2, the movable scroll 40 includes a flat plate-like movable side end plate 41 and a spiral movable portion protruding from the front surface (upper surface in FIG. 2) of the movable side end plate 41. It has a side wrap 42 and a boss portion 43 formed in a cylindrical shape protruding from the back surface (the lower surface in FIG. 2) of the movable side end plate 41.

  The fixed side wrap 33 of the fixed scroll 30 and the movable side wrap 42 of the movable scroll 40 are combined in a state where the lower surface of the fixed side end plate 32 and the upper surface of the movable side end plate 41 face each other. A compression chamber Sc is formed between the adjacent fixed wrap 33 and the movable wrap 42. As the movable scroll 40 revolves with respect to the fixed scroll 30 as will be described later, the volume of the compression chamber Sc changes periodically, and the refrigerant is sucked, compressed, and discharged in the scroll compression mechanism 60.

  The boss portion 43 is a cylindrical portion whose upper end is blocked. The movable scroll 40 and the crankshaft 80 are connected by inserting an eccentric portion 81 of the crankshaft 80 described later into the hollow portion of the boss portion 43. The boss portion 43 is disposed in an eccentric portion space 62 formed between the movable scroll 40 and the housing 61. The eccentric portion space 62 communicates with the high-pressure space S1 via an oil supply path 83 of the crankshaft 80 described later, and high pressure acts on the eccentric portion space 62. With this pressure, the lower surface of the movable side end plate 41 in the eccentric portion space 62 is pushed upward toward the fixed scroll 30. Due to this force, the movable scroll 40 comes into close contact with the fixed scroll 30.

  The movable scroll 40 is supported by the housing 61 via the Oldham ring 58. The Oldham ring 58 is a member that prevents the movable scroll 40 from rotating and revolves. When the crankshaft 80 rotates by using the Oldham ring 58, the movable scroll 40 connected to the crankshaft 80 at the boss portion 43 revolves without rotating with respect to the fixed scroll 30, and the refrigerant in the compression chamber Sc. Is compressed.

(2-2-3) Housing The housing 61 is press-fitted into the cylindrical member 21, and is fixed to the cylindrical member 21 over the entire circumferential direction on the outer peripheral surface thereof. Further, the housing 61 and the fixed scroll 30 are fixed by a bolt or the like (not shown) so that the upper end surface of the housing 61 is in close contact with the lower surface of the outer edge portion 34 of the fixed scroll 30.

  The housing 61 is formed with a recess 61a disposed so as to be recessed in the central portion of the upper surface, and a bearing portion 61b disposed below the recess 61a.

  The recessed part 61a surrounds the side surface of the eccentric part space 62 in which the boss part 43 of the movable scroll 40 is disposed.

  A bearing 63 that supports the main shaft 82 of the crankshaft 80 is disposed in the bearing portion 61b. The bearing 63 rotatably supports the main shaft 82 inserted into the bearing 63.

(2-3) Drive Motor The drive motor 70 is rotatably accommodated inside the stator 71 with an annular stator 71 fixed to the inner wall surface of the cylindrical member 21 with a slight gap (air gap passage). And a rotor 72.

  The rotor 72 is connected to the movable scroll 40 via a crankshaft 80 disposed so as to extend in the vertical direction along the axial center of the cylindrical member 21. As the rotor 72 rotates, the movable scroll 40 revolves with respect to the fixed scroll 30.

(2-4) Crankshaft The crankshaft 80 (drive shaft) is disposed in the cylindrical member 21 and drives the scroll compression mechanism 60. Specifically, the crankshaft 80 transmits the driving force of the driving motor 70 to the movable scroll 40. The crankshaft 80 is disposed so as to extend in the vertical direction along the axial center of the cylindrical member 21, and connects the rotor 72 of the drive motor 70 and the movable scroll 40 of the scroll compression mechanism 60.

  The crankshaft 80 includes a main shaft 82 whose center axis coincides with the axis of the cylindrical member 21, and an eccentric portion 81 that is eccentric with respect to the axis of the cylindrical member 21.

  The eccentric portion 81 is inserted into the boss portion 43 of the movable scroll 40 as described above.

  The main shaft 82 is rotatably supported by a bearing 63 of the bearing portion 61b of the housing 61 and a lower bearing 90 described later. The main shaft 82 is connected to the rotor 72 of the drive motor 70 between the bearing portion 61 b and the lower bearing 90.

  An oil supply path 83 for supplying the refrigerator oil O to the scroll compression mechanism 60 and the like is formed inside the crankshaft 80. The lower end of the main shaft 82 is located in an oil sump space So formed in the lower part of the casing 20, and the refrigerating machine oil O in the oil sump space So is supplied to the scroll compression mechanism 60 and the like through the oil supply path 83.

(2-5) Lower Bearing The lower bearing 90 is provided at the lower part in the cylindrical member 21 and supports the crankshaft 80. Specifically, the lower bearing 90 is disposed below the drive motor 70. The lower bearing 90 is fixed to a lower housing 140 described later. The lower bearing 90 constitutes a bearing on the lower end side of the crankshaft 80 and rotatably supports the main shaft 82 of the crankshaft 80.

(2-6) Lower Housing FIG. 3 is a schematic diagram showing an example of the configuration of the lower housing 140. FIG. 4 is a view showing the IV-IV ′ arrow of FIG.

  The lower housing 140 is fixed to the cylindrical member 21 and fixes the lower bearing 90. The lower housing 140 includes a first lower housing member 141, a second lower housing member 142, and a viscoelastic body 143.

  The first lower housing member 141 is fixed in close contact with the inner peripheral surface of the cylindrical member 21 while surrounding the position where the crankshaft 80 is disposed. Specifically, the first lower housing member 141 is fixed to the cylindrical member 21 by press fitting.

  The second lower housing member 142 fixes the lower bearing 90.

  The viscoelastic body 143 is disposed between the first lower housing member 141 and the second lower housing member 142 and supports the second lower housing member 142 on the first lower housing member 141. For example, the viscoelastic body 143 includes ethylene propylene rubber (EPDM), chlorosulfonated polyethylene rubber (CSM), chloroprene rubber (CR), butyl rubber (IIR), hydrogenated nitrile rubber (H-NBR), polyamide resin (PA ), Phenol resin (PF), epoxy resin (ER), polyamideimide resin (PAI), fluororesin (PTFE), and the like.

  As a specific configuration of the lower housing 140, as shown in FIG. 3, the second lower housing member 142 is placed on the contact surface inside the first lower housing member 141 with the viscoelastic body 143 interposed therebetween. There is. Here, the first lower housing member 141 has a positioning pin 144 (positioning member) at a predetermined position, and the second lower housing member 142 has a positioning space 145 into which the positioning pin 144 is inserted. Then, by combining these, the second lower housing member 142 is fixed to the first lower housing member 141. The first lower housing member 141 has a positioning space 145 at a predetermined position, and the second lower housing member 142 has a positioning pin 144 inserted into the positioning space 145. Good. Even in such a configuration, the second lower housing member 142 is fixed to the first lower housing member 141.

(3) Operation of Scroll Compressor Next, the operation of the scroll compressor 10 will be described.

  When the drive motor 70 is activated, the rotor 72 rotates with respect to the stator 71, and the crankshaft 80 fixed to the rotor 72 rotates. When the crankshaft 80 rotates, the movable scroll 40 connected to the crankshaft 80 revolves with respect to the fixed scroll 30. Then, the low-pressure gas refrigerant in the refrigeration cycle is sucked into the compression chamber Sc from the peripheral side of the compression chamber Sc through the suction pipe 23. As the movable scroll 40 revolves, the suction pipe 23 and the compression chamber Sc are not in communication with each other, and the pressure in the compression chamber Sc starts to increase as the volume of the compression chamber Sc decreases.

  The refrigerant in the compression chamber Sc is compressed as the volume of the compression chamber Sc decreases, and finally becomes a high-pressure gas refrigerant. The high-pressure gas refrigerant is discharged from a discharge port 32 a located near the center of the fixed side end plate 32. Thereafter, the high-pressure gas refrigerant passes through a refrigerant passage (not shown) formed in the fixed scroll 30 and the housing 61 and flows into the high-pressure space S1. The high-pressure gas refrigerant in the refrigeration cycle that has flowed into the high-pressure space S <b> 1 and compressed by the scroll compression mechanism 60 is discharged from the discharge pipe 24.

  During such a series of operations in the scroll compressor 10, the vibration of the crankshaft 80 is transmitted to the lower bearing 90. Therefore, the scroll compressor according to the present embodiment has the following characteristics so that no noise is generated due to such vibration.

(4) Features (4-1)
The scroll compressor 10 according to the present embodiment includes a casing 20, a scroll compression mechanism 60, a crankshaft 80 (drive shaft), a lower bearing 90, and a lower housing 140. The casing 20 has a cylindrical member 21. The scroll compression mechanism 60 is disposed at the upper part in the cylindrical member 21. The crankshaft 80 is disposed in the cylindrical member 21 and drives the scroll compression mechanism 60. The lower bearing 90 is provided in the lower part in the cylindrical member 21 and supports the crankshaft 80. The lower housing 140 fixes the lower bearing 90. Here, the lower housing 140 includes a first lower housing member 141, a second lower housing member 142, and a viscoelastic body 143. The first lower housing member 141 is fixed in close contact with the inner peripheral surface of the cylindrical member 21 while surrounding the position where the crankshaft 80 is disposed. The second lower housing member 142 fixes the lower bearing 90. The viscoelastic body 143 is disposed between the first lower housing member 141 and the second lower housing member 142 and supports the second lower housing member 142 on the first lower housing member 141.

  Therefore, in the scroll compressor 10 according to the present embodiment, the first lower housing member 141 is fixed in close contact with the inner peripheral surface of the cylindrical member 21, so that the rigidity at the fixing location can be increased. . Thereby, vibration mode can be suppressed and noise can be suppressed. Further, since the second lower housing member 142 is supported by the first lower housing member 141 via the viscoelastic body 143, the rotation of the second lower housing member 142 accompanying the drive of the crankshaft 80 can be prevented. Further, since the second lower housing member 142 for fixing the lower bearing 90 and the first lower housing member 141 for fixing to the cylindrical member 21 are separated, the degree of freedom of the fixing position of the lower bearing 90 is increased, and the crankshaft 80 centering operations can be easily performed.

(4-2)
In the scroll compressor 10 according to the present embodiment, the first lower housing member 141 is fixed to the cylindrical member 21 by press fitting. With such a configuration, the rigidity of the first lower housing member 141 at the fixed position can be increased. Thereby, it is possible to suppress the vibration due to the drive of the crankshaft from being transmitted to the cylindrical member 21. The first lower housing member 141 is formed in an annular shape or an arc shape, for example.

(4-3)
In the scroll compressor 10 according to this embodiment, the second lower housing member 142 is placed on the inner contact surface of the first lower housing member 141 with the viscoelastic body 143 interposed therebetween. With such a configuration, a degree of freedom can be given to the fixed position of the lower bearing 90, and the centering operation with respect to the crankshaft 80 can be easily performed.

(4-4)
In the scroll compressor 10 according to the present embodiment, the first lower housing member 141 has a positioning pin 144 (positioning member) at a predetermined position, and the second lower housing member 142 has the positioning pin 144 inserted therein. Including a positioning space 145. With such a configuration, the first lower housing member 141 and the second lower housing member 142 are fixed in the positioning space 145 via the positioning pins 144, so that the second lower housing accompanying the driving of the crankshaft 80 is achieved. The rotation of the member 142 can be prevented.

  Further, in the scroll compressor 10 according to this embodiment, the first lower housing member 141 has a positioning space at a predetermined position, and the second lower housing member 142 is inserted into the positioning pin 144 (positioning). Member). Even in such a configuration, since the first lower housing member 141 and the second lower housing member 142 are fixed in the positioning space via the positioning pins 144, the second lower housing member 142 of the second lower housing member 142 accompanying the drive of the crankshaft 80 is used. Can prevent rotation.

(5) Modification (5-1) Modification A
In the scroll compressor 10 according to the present embodiment, the second lower housing member 142 is placed on the first lower housing member 141 with the viscoelastic body 143 interposed therebetween, but the scroll compression according to the present embodiment is performed. The machine 10 is not limited to such a configuration. For example, as shown in FIG. 5, the viscoelastic body 143 may integrally join the first lower housing member 141 and the second lower housing member 142 by welding. Since the viscoelastic body 143 integrally joins the first lower housing member 141 and the second lower housing member 142 by welding, the rotation of the second lower housing member accompanying the driving of the crankshaft 80 can be reliably prevented.

(5-2) Modification B
The scroll compressor 10 according to the present embodiment may further include a rotation preventing member that prevents the rotation of the second lower housing member 142 when the crankshaft 80 is driven. If such a rotation preventing member is provided, the rotation of the second lower housing member 142 accompanying the driving of the crankshaft 80 can be prevented.

(5-3) Modification C
In the scroll compressor 10 according to the present embodiment, the first lower housing member 141 and the second lower housing member 142 can take various shapes. For example, the first lower housing member 141 and the second lower housing member 142 may have shapes as shown in FIGS. FIG. 6A is a plan view of the first lower housing member 141, and FIG. 6B is a cross-sectional view taken along line AA ′ in FIG. FIG. 7A shows a plan view of the second lower housing member 142, and FIG. 7B shows a cross-sectional view taken along line BB ′ in FIG. 7A. As shown in FIGS. 6 and 7, the first lower housing member 141 has a connection surface 141s opened in an inverted frustoconical shape, and the second lower housing member 142 has an inverted frustoconical connection surface 142s. Have The connection surfaces 141 s and 142 s are in contact with each other via the viscoelastic body 143, and the second lower housing member 142 is fixed to the first lower housing member 141. In this shape, since the surfaces of the connection surfaces 141 s and 142 s are large, the rotation of the second lower housing member 142 accompanying the driving of the crankshaft 80 can be reliably prevented.

(5-4) Modification D
Further, in the scroll compressor 10 according to the present embodiment, the first lower housing member 141 and the second lower housing member 142 are in contact with each other when the relative rotation position on the same axis is the first rotation position, and the second rotation. The shape may not be in contact with each other when in the position.

  Specifically, the first lower housing member 141 and the second lower housing member 142 may have shapes as shown in FIGS. FIG. 8A shows a plan view of the first lower housing member 141, and FIG. 8B shows a C-C ′ cross-sectional view in FIG. FIG. 9A is a plan view of the second lower housing member 142, and FIG. 9B is a cross-sectional view taken along the line D-D ′ in FIG. 9A.

  Here, in the first lower housing member 141, the annular member is divided into six equal parts, and three fixing members 141a to 141c excluding adjacent portions are integrally formed with the outer peripheral portion 141r. The fixing members 141a to 141c are provided with positioning pins 144a to 144c.

  Further, the second lower housing member 142 is formed integrally with the center portion 142o by dividing the ring into six equal parts and excluding the adjacent portions. Further, positioning spaces 145a to 145c are formed in the respective fixing members 142a to 142c. The positioning spaces 145a to 145c are formed so that the positioning pins 144a to 144c can be inserted therein.

  Then, the fixing members 142 a to 142 c of the second lower housing member 142 are fixed to the fixing members 141 a to 141 c of the first lower housing member 141 via the viscoelastic body 143. It is assumed that the outer diameter of the virtual ring forming the second lower housing member 142 is smaller than the inner diameter of the virtual ring forming the first lower housing member 141.

  In such a scroll compressor 10, the relative rotational position is set to the first rotational position, the second lower housing member 142 is inserted from below so as not to contact the first lower housing member 141, and the second lower housing is inserted after the insertion. The member 142 can be rotated to the second rotational position (rotated 60 degrees in the example of FIG. 9), and the rotated second lower housing member 142 can be lowered and brought into contact with the first lower housing member 141 and fixed. Thereby, the assembly operation of the scroll compressor 10 can be simplified. 8 and 9 are merely examples, and the shape is not limited to this as long as the above effects are satisfied.

(5-4) Modification E
In the above embodiment, the compressor is the scroll compressor 10, but is not limited to this, and can be applied to other types of compressors having a suction pipe and a compression mechanism.

<Appendix>
In addition, this invention is not limited to the said embodiment as it is. The present invention can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, the present invention can form various inventions by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements may be appropriately combined in different embodiments.

10 Scroll compressor (compressor)
20 Casing 21 Cylindrical member 60 Scroll compression mechanism 80 Crankshaft (drive shaft)
90 Lower bearing 140 Lower housing 141 First lower housing member 141a Fixing member 141b Fixing member 141c Fixing member 141r Outer peripheral part 141s Connection surface 142 Second lower housing member 142a Fixing member 142b Fixing member 142c Fixing member 142o Center part 142s Connecting surface 143 Viscosity Elastic body 144 Positioning pin (positioning member)
144a Positioning pin 144b Positioning pin 144c Positioning pin 145 Positioning space 145a Positioning space 145b Positioning space 145c Positioning space

JP 2005-133657 A Patent 5341797

Claims (8)

A casing (20) having a cylindrical member (21);
A compression mechanism (60) disposed at an upper portion in the cylindrical member;
A drive shaft (80) disposed within the cylindrical member and driving the compression mechanism;
A lower bearing (90) provided at a lower portion in the cylindrical member and supporting the drive shaft;
A lower housing (140) for fixing the lower bearing;
A compressor (10) comprising:
The lower housing is
A first lower housing member (141) fixed in close contact with an inner peripheral surface of the cylindrical member while surrounding a position where the drive shaft is disposed;
A second lower housing member (142) for fixing the lower bearing;
A viscoelastic body (143) disposed between the first lower housing member and the second lower housing member and supporting the second lower housing member on the first lower housing member;
Having a compressor. The first lower housing member is fixed to the cylindrical member by press-fitting.
The compressor according to claim 1. The viscoelastic body integrally joins the first lower housing member and the second lower housing member;
The compressor according to claim 1 or 2. The second lower housing member is placed on a contact surface inside the first lower housing member with the viscoelastic body interposed therebetween.
The compressor according to claim 1 or 2. The first lower housing member has a positioning member (144) at a predetermined position;
The second lower housing member has a positioning space (145) into which the positioning member is inserted.
The compressor according to claim 4. The first lower housing member has a positioning space at a predetermined position,
The second lower housing member has a positioning member inserted into the positioning space.
The compressor according to claim 4. An anti-rotation member for preventing rotation of the second lower housing member accompanying driving of the drive shaft;
The compressor according to any one of claims 4 to 6, further comprising: The first lower housing member and the second lower housing member are in contact with each other when the relative rotational position on the same axis is the first rotational position, and are not in contact with each other when the relative rotational position is the second rotational position.
The compressor according to any one of claims 1 to 7.

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