Scroll compressor

Abstract

To reduce a weight of a scroll compressor while increasing the strength of a second housing that seals a first housing for storing a compression part to secure sealing force for storing the compression part.SOLUTION: Provided is a scroll compressor having a bearing housing that is formed in a tube shape along an axis X1 which is the center around which an orbiting scroll orbits, and a rear housing 20 that seals one end of the bearing housing, wherein the rear housing 20 has: an end surface that is arranged facing the bearing housing; a bottom surface 22 that is arranged in a position further away from the bearing housing than the end surface; a cylindrical portion 23 that is arranged on an inner circumferential side of the bottom surface 22 relative to the axis X1 and forms a discharge space for a refrigerant; an annular portion 24 that is arranged on an outer circumferential side of the bottom surface 22 relative to the axis; and reinforcing portions 25 that are arranged at a plurality of locations in a circumferential direction around the axis, protrude along a direction away from the bearing housing with respect to the bottom surface 22, and join the cylindrical portion 23 and the annular portion 24.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a scroll compressor.

Background Art

[0002] Conventionally, a scroll compressor having a fixed scroll and a orbiting scroll meshed with the fixed scroll is known (see, for example, Patent Document 1). Patent Document 1 discloses a scroll compressor having a housing that houses a scroll compression mechanism and a front housing that seals one end of the housing, and a discharge chamber is formed between the housing and the front housing for discharging compressed refrigerant gas.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a scroll compressor, weight reduction is required, but at the same time, it is also required that the housing has sufficient strength so that the compressed refrigerant gas does not leak to the outside. In the scroll compressor disclosed in Patent Document 1, since the bolts inserted into the fixed scroll directly fasten the rear housing and the fixed scroll, and the bolts inserted into the front housing directly fasten the rear housing and the front housing, a sealing force for sealing the end portion of the rear housing that houses the scroll compression mechanism by the front housing can be ensured.

[0005] However, for example, when adopting a mechanism that fastens the rear housing, the fixed scroll, and the front housing only with bolts inserted into the front housing (when adopting a mechanism that indirectly fastens the fixed scroll with bolts inserted into the front housing), for example, it may not be possible to sufficiently ensure the sealing force for sealing the end of the rear housing that houses the scroll compression mechanism with the front housing. For example, the strength can be increased by increasing the thickness of the metal material forming the rear housing, but in that case, the weight of the scroll compressor will increase.

[0006] The present disclosure has been made in view of such circumstances, and an object thereof is to provide a scroll compressor capable of achieving weight reduction while increasing the strength of a second housing that seals a first housing that houses a compression part in order to ensure a sealing force for housing the compression part.

Means for Solving the Problems

[0007] The scroll compressor according to one aspect of the present disclosure includes a fixed scroll having a spiral first wall body erected on one side surface of a first end plate, and a spiral second wall body erected on one side surface of a second end plate. A compression part having a orbiting scroll that is meshed with the first wall body and supported so as to be able to perform a revolving and orbiting motion while being prevented from rotating, a first housing that is formed in a cylindrical shape along an axis that is the center around which the orbiting scroll rotates and has an internal space for housing the compression part, and a second housing that seals one end of the first housing along the axis. A discharge port through which the fluid compressed by the fixed scroll and the orbiting scroll is discharged is formed in the first end plate of the fixed scroll housed in the first housing. The second housing is arranged along a plane orthogonal to the axis and has an end surface arranged opposite to the first housing, a bottom surface arranged along a plane orthogonal to the axis and at a position farther from the first housing than the end surface, a cylindrical portion arranged on the inner peripheral side of the bottom surface with respect to the axis, protruding in a cylindrical shape along a direction away from the first housing with respect to the bottom surface, and forming a discharge space into which the refrigerant discharged from the discharge port is guided between the cylindrical portion and the first end plate, an annular portion arranged on the outer peripheral side of the bottom surface with respect to the axis, protruding in an annular shape along a direction away from the first housing with respect to the bottom surface, and a reinforcing portion arranged at a plurality of locations in the circumferential direction around the axis, protruding along a direction away from the first housing with respect to the bottom surface, and connecting the cylindrical portion and the annular portion.

Advantages of the Invention

[0008] According to the present disclosure, it is possible to provide a scroll compressor capable of achieving weight reduction while increasing the strength of a second housing that seals a first housing that houses a compression part in order to ensure a sealing force for housing the compression part.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0010] The scroll compressor 100 according to an embodiment of the present disclosure will be described with reference to the drawings. The scroll compressor 100 of the present embodiment is used, for example, in a vehicle air conditioner.

[0011] FIG. 1 is a longitudinal sectional view showing a schematic configuration of the scroll compressor 100 according to the present embodiment. As shown in FIG. 1, the scroll compressor 100 includes a bearing housing (first housing) 10, a rear housing (second housing) 20, a front housing (third housing) 30, a scroll compression mechanism (compression section) 40, a motor 50, a bearing section 60, an inverter 70, and a gasket 80.

[0012] The bearing housing 10, the rear housing 20, and the front housing 30 form the outer shell of the scroll compressor 100 and are formed of an aluminum alloy. The bearing housing 10 is formed in a cylindrical shape along an axis X1 that is the center around which the orbiting scroll 42 orbits. The bearing housing 10 has an internal space for housing the bearing section 60 and the scroll compression mechanism 40.

[0013] The rear housing 20 seals one end along the axis X1 of the bearing housing 10, and is provided with a discharge port (not shown) for the refrigerant gas compressed by the scroll compression mechanism 40. The front housing 30 seals the other end along the axis X1 of the bearing housing 10, and is provided with an internal space for housing the motor 50 and the inverter 70 inside. The internal space of the front housing 30 for housing the motor 50 communicates with the internal space of the bearing housing 10 for housing the bearing portion 60. The internal space for housing the motor 50 and the internal space for housing the inverter 70 are independent spaces that do not communicate with each other.

[0014] As shown in FIG. 1, an insertion hole 10b for inserting the positioning pin 20a is formed in the end face 10a of the bearing housing 10. An insertion hole 20b for inserting the positioning pin 20a is formed in the end face 21 of the rear housing 20. With the positioning pin 20a inserted into both the insertion hole 10b and the insertion hole 20b, the end face 10a of the bearing housing 10 and the end face 21 of the rear housing 20 are arranged to face each other. By means of the plurality of positioning pins 20a, the rear housing 20 is positioned relative to the bearing housing 10 so as not to rotate around the axis X1.

[0015] As shown in FIG. 1, an insertion hole for inserting the positioning pin 20a is formed in the end plate 41A of the fixed scroll 41. An insertion hole for inserting the positioning pin 20a is formed in the end face 21 of the rear housing 20. With the positioning pin 20a inserted into both the insertion hole of the fixed scroll 41 and the insertion hole of the rear housing 20, the end plate 41A of the fixed scroll 41 and the end face 21 of the rear housing 20 are arranged to face each other. By means of the plurality of positioning pins 20a, the fixed scroll 41 is positioned relative to the rear housing 20 so as not to rotate around the axis X1.

[0016] The front housing 30 is provided with a suction port (not shown) for sucking in the refrigerant. The refrigerant supplied from the outside is introduced into the internal space of the front housing 30 through the suction port. The refrigerant introduced into the front housing 30 passes through the motor 50 along the axis X1 and is guided toward the scroll compression mechanism 40. The refrigerant sucked in from the suction port is a mixed refrigerant (fluid) containing lubricating oil and refrigerant gas.

[0017] The scroll compression mechanism 40 is a device that is disposed inside the bearing housing 10 and rotates around the axis X1 to compress the refrigerant gas. The scroll compression mechanism 40 includes a fixed scroll 41 that is sandwiched and fixed between the bearing housing 10 and the rear housing 20, and a orbiting scroll 42 that meshes with the fixed scroll 41. The scroll compression mechanism 40 compresses the refrigerant gas by causing the orbiting scroll 42 to revolve around the fixed scroll 41 by the driving force of the motor 50.

[0018] The fixed scroll 41 has a spiral wrap (first wall body) 41B that is a wall body erected on one side surface of an end plate (first end plate) 41A. The end plate 41A is formed with a discharge port 41C through which the refrigerant gas compressed by the fixed scroll 41 and the orbiting scroll 42 is discharged.

[0019] The orbiting scroll 42 has a spiral wrap (second wall body) 42B that is a wall body erected on one side surface of an end plate (second end plate) 42A. The orbiting scroll 42 is connected to an eccentric shaft (not shown) that is connected to the motor 50, and is supported so as to be capable of revolving and orbiting through a rotation prevention mechanism (not shown). The orbiting scroll 42 is supported so as to be capable of revolving and orbiting while being meshed with the spiral wrap 41B of the fixed scroll 41 and having its rotation prevented.

[0020] As shown in FIG. 1, the scroll compression mechanism 40 has a reed valve 43 attached to the fixed scroll 41 so as to close the discharge port 41C. The reed valve 43 is in an open state when the pressure of the refrigerant gas in the compression chamber 40A becomes equal to or higher than a predetermined pressure, and guides the refrigerant gas discharged from the discharge port 41C to the discharge space 41D. The refrigerant gas guided to the discharge space 41D is guided to the outside through a discharge port (not shown).

[0021] The motor 50 is a device that revolves and rotates the orbiting scroll 42 of the scroll compression mechanism 40 around the axis X1 with respect to the fixed scroll 41. The motor 50 is connected to the orbiting scroll 42 via an eccentric shaft (not shown).

[0022] The bearing portion 60 is a member that supports a rotating shaft (not shown) that rotates around the axis X1 by the motor 50. An eccentric shaft that is eccentric with respect to the axis X1 is provided at the end of the rotating shaft on the scroll compression mechanism 40 side.

[0023] The inverter 70 is a device that generates a drive voltage for driving the motor 50 and controls the rotational speed of the motor 50. The gasket 80 is disposed between the end face 10a on the rear housing 20 side of the bearing housing 10 and the end face 21 on the bearing housing 10 side of the rear housing 20, and is a member that forms a seal area so that refrigerant does not flow out between the end face 10a and the end face 21.

[0024] Next, with reference to FIGS. 2 to 5, the structure of the rear housing 20 that realizes weight reduction while increasing the strength to ensure the sealing force for housing the scroll compression mechanism 40 will be described. FIG. 2 is a right side view of the scroll compressor 100 shown in FIG. 1. FIG. 3 is a cross-sectional view taken along the line A-A of the scroll compressor 100 shown in FIG. 2. FIG. 4 is a cross-sectional view taken along the line B-B of the scroll compressor 100 shown in FIG. 2. FIG. 5 is a cross-sectional view taken along the line C-C of the scroll compressor 100 shown in FIG. 2.

[0025] As shown in FIGS. 2 to 5, the rear housing 20 has a bottom surface 22, a cylindrical portion 23, an annular portion 24, and a reinforcing portion 25. The bottom surface 22, the cylindrical portion 23, the annular portion 24, and the reinforcing portion 25 are integrally formed of an aluminum alloy. As shown in FIG. 3, the end face 21 of the rear housing 20 is a surface that is arranged along a plane perpendicular to the axis X1 and is arranged opposite to the bearing housing 10. As shown in FIG. 4, the bottom surface 22 of the rear housing 20 is arranged along a plane perpendicular to the axis X1 and is arranged at a position L1 farther from the bearing housing 10 than the end face 21.

[0026] The cylindrical portion 23 is arranged on the inner peripheral side of the bottom surface 22 with respect to the axis X1, and is a portion that protrudes cylindrically along a direction away from the bearing housing 10 with respect to the bottom surface 22. As shown in FIG. 4, the length from the end face 21 of the rear housing 20 to the top 23a of the cylindrical portion 23 is L2, which is longer than L1. As shown in FIGS. 2 and 3, the maximum outer diameter of the cylindrical portion 23 centered on the axis X1 is D1. As shown in FIG. 3, the cylindrical portion 23 forms a discharge space 41D into which the refrigerant discharged from the discharge port 41C is guided between the end plate 41A of the fixed scroll 41.

[0027] The annular portion 24 is arranged on the outer peripheral side of the bottom surface 22 with respect to the axis X1, and is a portion that protrudes annularly along a direction away from the bearing housing 10 with respect to the bottom surface 22. As shown in FIG. 4, from the end face 21 of the rear housing 20 to the top 24a of the annular portion 24, it is L3, which is longer than L1 and shorter than L2.

[0028] As shown in FIG. 2, in the annular portion 24, insertion holes 24b for inserting fastening bolts 90 that generate a pressing force for pressing the rear housing 20 toward the bearing housing 10 are formed at a plurality of locations (six locations in FIG. 2) in the circumferential direction CD. At positions adjacent to the insertion holes 24b in the circumferential direction CD and sandwiching the insertion holes 24b, a pair of reinforcing portions 25 are connected to the cylindrical portion 23 and the annular portion 24.

[0029] At the end of the bearing housing 10 side of the front housing 30, there is formed a fastening hole (not shown) to which the male thread formed at the tip of the fastening bolt 90 is fastened. The bearing housing 10 is fixed in a state of being sandwiched along the axis X1 between the rear housing 20 and the front housing 30 by fastening the fastening bolt 90 inserted into the insertion hole 24b of the rear housing 20 to the fastening hole formed in the front housing 30.

[0030] The reinforcing portion 25 is disposed at a plurality of locations in the circumferential direction CD around the axis X1 and is a portion that protrudes along a direction away from the bearing housing 10 with respect to the bottom surface 22. The reinforcing portion 25 reinforces the rear housing 20 and increases the strength by connecting the cylindrical portion 23 and the annular portion 24.

[0031] As shown in FIGS. 2 and 5, the reinforcing portion 25 is formed such that the width W1 in the circumferential direction CD gradually widens from the annular portion 24 toward the cylindrical portion 23. As shown in FIG. 4, the reinforcing portion 25 is formed such that the length L4 along the axis X1 with respect to the bottom surface 22 gradually increases from the annular portion 24 toward the cylindrical portion 23.

[0032] As shown in FIGS. 2 and 5, around the insertion hole 24b, there is formed a seating surface 24c that contacts the head of the fastening bolt 90 when the fastening bolt 90 is fastened to the front housing 30. The seating surface 24c is a flat surface formed in a plane orthogonal to the axis X1 and is formed in a substantially annular shape in plan view. In the circumferential direction CD, the width W2 of the bottom surface 22 sandwiched between the pair of reinforcing portions 25 is narrower than the width W3 of the seating surface 24c that contacts the head of the fastening bolt 90.

[0033] Next, with reference to FIG. 6, the effect of the reinforcing portion 25 connecting the cylindrical portion 23 and the annular portion 24 to enhance the strength of the rear housing 20 will be described. FIG. 6 is a plan view of the rear housing 20 shown in FIG. 2 as viewed from the bearing housing 10 side. As shown in FIG. 6, the end face 21 of the rear housing 20 has an inner end face 21A that contacts the end plate 41A of the fixed scroll 41 and an outer end face 21B that contacts the end face 10a of the bearing housing 10 via the gasket 80.

[0034] Due to the fastening force generated by the fastening bolt 90 inserted into the insertion hole 24b of the rear housing 20 and fastened to the front housing 30, the inner end face 21A contacts the end plate 41A of the fixed scroll 41, and the outer end face 21B contacts the end face 10a of the bearing housing 10 via the gasket 80. The fastening force generated by the fastening bolt 90 acts on the rear housing 20 as a pressing force for fixing the fixed scroll 41 and a pressing force for fixing the rear housing 20 to the front housing 30.

[0035] When a pressing force acts on the annular portion 24 on the outer peripheral side of the rear housing 20 where the insertion hole 24b is disposed, the annular portion 24 tends to deform toward the bearing housing 10 side with respect to the cylindrical portion 23. Therefore, in the rear housing 20 of the present embodiment, the reinforcing portion 25 connects the cylindrical portion 23 and the annular portion 24 to enhance the strength of the rear housing 20. Therefore, it is possible to prevent a decrease in the pressing force for fixing the fixed scroll 41 and a decrease in the pressing force for fixing the rear housing 20 to the front housing 30 due to the annular portion 24 deforming toward the bearing housing 10 side with respect to the cylindrical portion 23.

[0036] The operations and effects of the scroll compressor 100 of the present embodiment described above will be described. According to the scroll compressor 100 of the present embodiment, a cylindrical portion 23 is disposed on the inner peripheral side of the bottom surface 22 of the rear housing 20 with respect to an axis X1 which is the center around which the orbiting scroll 42 orbits, and an annular portion 24 is disposed on the outer peripheral side of the bottom surface 22 of the rear housing 20 with respect to the axis X1. Since the cylindrical portion 23 protrudes in a direction away from the bearing housing 10 on the inner peripheral side of the bottom surface 22, and the annular portion 24 protrudes in a direction away from the bearing housing 10 on the outer peripheral side of the bottom surface 22, the strength of the rear housing 20 is increased as compared with the case where the cylindrical portion 23 and the annular portion 24 are not provided. Further, since the cylindrical portion 23 and the annular portion 24 are connected by a reinforcing portion 25, the overall strength of the rear housing 20 including the cylindrical portion 23 and the annular portion 24 is increased. Furthermore, since the plurality of reinforcing portions 25 are dispersedly arranged at a plurality of positions in the circumferential direction CD around the axis X1, the rear housing 20 can be lightened as compared with the case of reinforcing the entire circumferential direction CD. Thus, according to the scroll compressor 100 of the present embodiment, it is possible to realize weight reduction while increasing the strength of the housing in order to secure the sealing force for housing the scroll compression mechanism 40.

[0037] According to the scroll compressor 100 of the present embodiment, by gradually widening the width W1 in the circumferential direction CD of the reinforcing portion 25 from the annular portion 24 toward the cylindrical portion 23, the ratio of the region where the reinforcing portion 25 is connected to the entire circumference length of the cylindrical portion 23 can be increased, and the strength of the cylindrical portion 23 forming the discharge space 41D where the refrigerant pressure acts can be increased.

[0038] According to the scroll compressor 100 of the present embodiment, by gradually increasing the length along the axis X1 of the reinforcing portion 25 with respect to the bottom surface 22 from the annular portion 24 toward the cylindrical portion 23, the ratio of the region where the reinforcing portion 25 is connected to the length L2 of the cylindrical portion 23 in the axis X1 direction can be increased, and the strength of the cylindrical portion 23 forming the discharge space 41D where the refrigerant pressure acts can be increased.

[0039] According to the scroll compressor 100 of the present embodiment, by reinforcing the position sandwiching the insertion hole 24b on which the pressing force by the fastening bolt 90 acts in the circumferential direction CD with a pair of reinforcing portions 25, the strength of the rear housing 20 in the vicinity of the insertion hole 24b can be increased.

[0040] According to the scroll compressor 100 of the present embodiment, by fastening the fastening bolt 90 inserted into the insertion hole 24b of the rear housing 20 to the fastening hole formed in the front housing 30, the bearing housing 10 can be fixed in a state of being sandwiched along the axis X1 between the rear housing 20 and the front housing 30.

[0041] According to the scroll compressor 100 of the present embodiment, in the circumferential direction CD, by making the width W2 of the bottom surface 22 sandwiched between the pair of reinforcing portions 25 narrower than the width W3 of the seating surface 24c in contact with the fastening bolt 90, while increasing the strength of the cylindrical portion 23 with the pair of reinforcing portions 25, weight reduction of the rear housing 20 by providing the bottom surface 22 can be realized.

[0042] The scroll compressor described in the present embodiment described above is grasped as follows, for example. The scroll compressor (100) according to the first aspect of the present disclosure includes a fixed scroll (41) having a spiral first wall (41B) erected on one side surface of a first end plate (41A), and a spiral second wall (42B) erected on one side surface of a second end plate (42A). The scroll compressor (100) has a compression section (40) including a swash scroll (42) that is engaged with the first wall and supported so as to be capable of a revolving and turning motion while being prevented from rotating, a first housing (10) that is formed in a cylindrical shape along an axis (X1) that is the center around which the swash scroll turns and has an internal space for housing the compression section, and a second housing (20) that seals one end of the first housing along the axis. A discharge port (41C) through which fluid compressed by the fixed scroll and the swash scroll is discharged is formed in the first end plate of the fixed scroll housed in the first housing. The second housing includes an end surface (21) that is arranged along a plane orthogonal to the axis and is arranged opposite to the first housing, a bottom surface (22) that is arranged along a plane orthogonal to the axis and is arranged at a position farther from the first housing than the end surface, a cylindrical portion (23) that is arranged on the inner peripheral side of the bottom surface with respect to the axis, protrudes in a cylindrical shape along a direction away from the first housing with respect to the bottom surface, and forms a discharge space (41D) into which the refrigerant discharged from the discharge port is guided between the cylindrical portion and the first end plate, an annular portion (24) that is arranged on the outer peripheral side of the bottom surface with respect to the axis, protrudes in an annular shape along a direction away from the first housing with respect to the bottom surface, and a reinforcing portion (25) that is arranged at a plurality of locations in the circumferential direction around the axis, protrudes along a direction away from the first housing with respect to the bottom surface, and connects the cylindrical portion and the annular portion.

[0043] According to the scroll compressor according to the first aspect of the present disclosure, as the swash scroll makes a revolving and turning motion with respect to the fixed scroll, the fluid introduced from the outer peripheral side of the compression section is gradually compressed and discharged from the discharge port into the discharge space. The discharge space is formed between the first end plate of the fixed scroll and the cylindrical portion of the second housing, and is a space into which the refrigerant discharged from the discharge port is guided.

[0044] According to the scroll compressor according to the first aspect of the present disclosure, a cylindrical portion is disposed on the inner peripheral side of the bottom surface of the second housing with respect to the axis that is the center around which the orbiting scroll orbits, and an annular portion is disposed on the outer peripheral side of the bottom surface of the second housing with respect to the axis. Since the cylindrical portion protrudes in a direction away from the first housing on the inner peripheral side of the bottom surface, and the annular portion protrudes in a direction away from the first housing on the outer peripheral side of the bottom surface, the strength of the second housing is increased as compared with the case where the cylindrical portion and the annular portion are not provided. Further, since the cylindrical portion and the annular portion are connected by a reinforcing portion, the overall strength of the second housing including the cylindrical portion and the annular portion is increased. Furthermore, since the plurality of reinforcing portions are dispersedly arranged at a plurality of locations in the circumferential direction around the axis, the second housing can be lightened as compared with the case of reinforcing the entire circumferential direction. Thus, according to the scroll compressor according to the first aspect of the present disclosure, it is possible to realize weight reduction while increasing the strength of the second housing that seals the first housing that houses the compression portion in order to secure the sealing force for housing the compression portion.

[0045] The scroll compressor according to the second aspect of the present disclosure further includes the following configuration in the first aspect. That is, the reinforcing portion is formed such that the width in the circumferential direction gradually increases from the annular portion toward the cylindrical portion.

[0046] According to the scroll compressor according to the second aspect of the present disclosure, by gradually increasing the width in the circumferential direction of the reinforcing portion from the annular portion toward the cylindrical portion, the ratio of the region where the reinforcing portion is connected to the entire circumferential length of the cylindrical portion can be increased, and the strength of the cylindrical portion that forms the discharge space on which the pressure of the refrigerant acts can be increased.

[0047] The scroll compressor according to the third aspect of the present disclosure further includes the following configuration in the first aspect or the second aspect. That is, the reinforcing portion is formed such that the length along the axis with respect to the bottom surface gradually increases from the annular portion toward the cylindrical portion.

[0048] According to the scroll compressor according to the third aspect of the present disclosure, by gradually increasing the length along the axis of the reinforcing portion with respect to the bottom surface from the annular portion toward the cylindrical portion, the ratio of the region where the reinforcing portion is connected to the length in the axial direction of the cylindrical portion can be increased, and the strength of the cylindrical portion forming the discharge space on which the pressure of the refrigerant acts can be increased.

[0049] The scroll compressor according to the fourth aspect of the present disclosure further includes the following configuration in the first aspect or the second aspect. That is, the annular portion is formed with insertion holes (24b) into which fastening bolts (90) that generate a pressing force for pressing the second housing toward the first housing are inserted at a plurality of locations in the circumferential direction, and at positions adjacent to the insertion holes in the circumferential direction and sandwiching the insertion holes, a pair of the reinforcing portions are connected to the cylindrical portion and the annular portion.

[0050] According to the scroll compressor according to the fourth aspect of the present disclosure, by reinforcing the positions sandwiching the insertion holes, where the pressing force by the fastening bolts is likely to act, with a pair of reinforcing portions, the strength of the second housing in the vicinity of the insertion holes can be increased.

[0051] The scroll compressor according to the fifth aspect of the present disclosure further includes the following configuration in the fourth aspect. That is, it includes a motor (50) that drives the orbiting scroll, and a third housing (30) that houses the motor and is formed with fastening holes to which the fastening bolts are fastened. The first housing is fixed in a state of being sandwiched along the axis between the second housing and the third housing by fastening the fastening bolts inserted into the insertion holes of the second housing to the fastening holes formed in the third housing.

[0052] According to the scroll compressor according to the fifth aspect of the present disclosure, by fastening the fastening bolts inserted into the insertion holes of the second housing to the fastening holes formed in the third housing, the first housing can be fixed in a state of being sandwiched along the axis between the second housing and the third housing.

[0053] The scroll compressor according to the sixth aspect of the present disclosure further includes the following configuration in the fourth aspect. That is, in the circumferential direction, the width of the bottom surface sandwiched between the pair of reinforcing portions is narrower than the width of the seating surface (24) with which the fastening bolt contacts.

[0054] According to the scroll compressor according to the sixth aspect of the present disclosure, in the circumferential direction, by making the width of the bottom surface sandwiched between the pair of reinforcing portions narrower than the width of the seating surface with which the fastening bolt contacts, it is possible to realize weight reduction of the second housing by providing the bottom surface while increasing the strength of the cylindrical portion by the pair of reinforcing portions.

Explanation of Signs

[0055] 10 Bearing housing (first housing) 10a End face 10b Insertion hole 20 Rear housing (second housing) 20a Positioning pin 20b Insertion hole 21 End face 22 Bottom surface 23 Cylindrical portion 23a Top 24 Annular portion 24a Top 24b Insertion hole 24c Seating surface 25 Reinforcing portion 30 Front housing (third housing) 40 Scroll compression mechanism (compression portion) 40A Compression chamber 41 Fixed scroll 41A End plate 41D Discharge space 42 Orbiting scroll 43 Reed valve 50 Motor 60 Bearing portion 70 Inverter 80 Gasket 90 Fastening bolt 100 Scroll compressor CD Circumferential direction

Claims

1. A fixed scroll having a spiral first wall body erected on one side surface of the first end plate, and a spiral second wall body erected on one side surface of the second end plate, and meshing with the first wall body to be supported so as to be capable of revolving while being prevented from rotating, and a compression part having a revolving scroll; A first housing formed in a cylindrical shape along an axis that is the center around which the revolving scroll revolves and having an internal space for housing the compression part; A second housing for sealing one end of the first housing along the axis; A discharge port through which a fluid compressed by the fixed scroll and the revolving scroll is discharged is formed in the first end plate of the fixed scroll housed in the first housing; The second housing An end surface arranged along a plane orthogonal to the axis and arranged opposite to the first housing; A bottom surface arranged along a plane orthogonal to the axis and arranged at a position farther from the first housing than the end surface; A cylindrical part arranged on the inner peripheral side of the bottom surface with respect to the axis, protruding cylindrically along a direction away from the first housing with respect to the bottom surface, and forming a discharge space into which the refrigerant discharged from the discharge port is guided between the cylindrical part and the first end plate; An annular part arranged on the outer peripheral side of the bottom surface with respect to the axis, protruding annularly along a direction away from the first housing with respect to the bottom surface; A scroll compressor having a plurality of reinforcing parts arranged at a plurality of locations in the circumferential direction around the axis, protruding along a direction away from the first housing with respect to the bottom surface, and connecting the cylindrical part and the annular part.

2. The scroll compressor according to claim 1, wherein the reinforcing part is formed such that the width in the circumferential direction gradually widens from the annular part toward the cylindrical part.

3. The scroll compressor according to claim 1 or claim 2, wherein the reinforcing part is formed such that the length along the axis with respect to the bottom surface gradually increases from the annular part toward the cylindrical part.

4. Insertion holes for inserting fastening bolts that generate a pressing force for pressing the second housing toward the first housing are formed at a plurality of locations in the circumferential direction in the annular part. The scroll compressor according to claim 1 or claim 2, wherein a pair of the reinforcing portions are connected to the cylindrical portion and the annular portion at a position adjacent to and sandwiching the insertion hole in the circumferential direction.

5. a motor for driving the orbiting scroll; a third housing that houses the motor and has a fastening hole formed therein for fastening the fastening bolt; The scroll compressor according to claim 4, wherein the first housing is fixed in a state of being sandwiched along the axis between the second housing and the third housing by fastening the fastening bolt inserted into the insertion hole of the second housing to the fastening hole formed in the third housing.

6. The scroll compressor according to claim 4, wherein the width of the bottom surface sandwiched between the pair of the reinforcing portions in the circumferential direction is narrower than the width of the seating surface with which the fastening bolt comes into contact.

Images