Scroll compressor

Abstract

The utility model provides a scroll compressor (100) in order to ensure the sealing force for accommodating a compression part, improve the strength of a second shell of a first shell for hermetically accommodating the compression part and realize light weight. The scroll compressor is provided with a bearing housing formed in a cylindrical shape along an axis (X1) that is the center of rotation of an orbiting scroll, and a rear housing (20) that seals one end along the axis of the bearing housing, the rear housing (20) having an end surface disposed facing the bearing housing, a bottom surface (22) disposed at a position farther from the bearing housing than the end surface, and a sealing member (30) disposed on the inner peripheral side of the bottom surface (22) with respect to the axis (X1). A cylindrical portion (23) that protrudes cylindrically and forms a refrigerant discharge space; an annular portion (24) that is disposed on the outer peripheral side of the bottom surface (22) with respect to the axis and that protrudes annularly; and reinforcing portions (25) that are disposed at a plurality of locations in the circumferential direction around the axis, protrude in the direction away from the bearing housing with respect to the bottom surface (22), and connect the cylindrical portion (23) and the annular portion (24).

Description

Technical Field

[0001] The utility model relates to a scroll compressor. Background Art

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

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2007-327436.

[0006] Technical problems to be solved by the utility model

[0007] Scroll compressors are required to be lightweight, but they also require the housing to have sufficient strength to prevent compressed refrigerant gas from leaking to the outside. In the scroll compressor disclosed in Patent Document 1, bolts inserted into the fixed scroll directly fasten the rear housing to the fixed scroll, while bolts inserted into the front housing directly fasten the rear housing to the front housing. This ensures a sealing force that hermetically seals the end of the rear housing, which houses the scroll compression mechanism, through the front housing.

[0008] However, for example, in the case of a mechanism in which the rear housing and the fixed scroll, and the rear housing and the front housing, are fastened only by bolts inserted through the front housing (in the case of a mechanism in which the fixed scroll is indirectly fastened by bolts inserted through the front housing), there is a possibility that the strength of the rear housing will be insufficient to ensure sufficient sealing force to seal the end of the rear housing that houses the scroll compression mechanism through the front housing. For example, the strength can be increased by increasing the thickness of the metal material forming the rear housing, but in this case, the weight of the scroll compressor will increase. Utility Model Content

[0009] SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a scroll compressor capable of improving the strength of a first housing and a second housing that hermetically houses a compression portion in order to ensure a sealing force for the compression portion and achieving weight reduction.

[0010] Technical means for solving technical problems

[0011] The worm gear of the compressor is connected to the first end plate of the rotary table by the guide rail, and the worm gear of the compressor is connected to the second end plate of the rotary table by the guide rail. The body comprises: an end face, which is arranged along a plane perpendicular to the axis and is arranged opposite to the first shell; a bottom face, which is arranged along a plane perpendicular to the axis and is arranged at a position farther away from the first shell than the end face; a cylindrical portion, which is arranged on the inner circumferential side of the bottom face relative to the axis, protrudes cylindrically relative to the bottom face in a direction away from the first shell, and forms a discharge space between the cylindrical portion and the first end plate, which guides the refrigerant discharged from the discharge port; an annular portion, which is arranged on the outer circumferential side of the bottom face relative to the axis, protrudes annularly relative to the bottom face in a direction away from the first shell; and a reinforcing portion, which is arranged at multiple positions in the circumferential direction around the axis, protrudes relative to the bottom face in a direction away from the first shell, and connects the cylindrical portion and the annular portion.

[0012] Effect of utility model

[0013] According to the present invention, a scroll compressor can be provided that can improve the strength of a first housing and a second housing that hermetically seal and accommodate a compression portion in order to ensure a sealing force for accommodating the compression portion, thereby achieving weight reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a longitudinal sectional view showing a schematic structure of a scroll compressor according to one embodiment of the present invention.

[0015] Figure 2 yes Figure 1 Right side view of a scroll compressor shown.

[0016] Figure 3 yes Figure 2 A cross-sectional view taken along arrow AA of the scroll compressor is shown.

[0017] Figure 4 yes Figure 2A cross-sectional view taken along arrow BB of the scroll compressor is shown.

[0018] Figure 5 yes Figure 2 The scroll compressor is shown in a cross-sectional view taken along the line CC.

[0019] Figure 6 Viewed from the bearing housing side Figure 2 A top view of the rear housing is shown.

[0020] Explanation of symbols

[0021] 10 bearing housing (first housing)

[0022] 10a end face

[0023] 10b insertion hole

[0024] 20 rear housing (second housing)

[0025] 20a positioning pin

[0026] 20b insertion hole

[0027] 21 end face

[0028] 22 bottom

[0029] 23 cylindrical part

[0030] 23a top

[0031] 24 annular portion

[0032] 24a top

[0033] 24b insertion hole

[0034] 24c seat

[0035] 25 Strengthening Department

[0036] 30 front housing (third housing)

[0037] 40 Scroll compression mechanism (compression unit)

[0038] 40A compression chamber

[0039] 41 fixed scroll

[0040] 41A end plate

[0041] 41D exhaust space

[0042] 42 rotating scroll

[0043] 43 reed valve

[0044] 50 motor

[0045] 60 bearing part

[0046] 70 inverter

[0047] 80 washers

[0048] 90 fastening bolts

[0049] 100 scroll compressor

[0050] CD circumferential direction. DETAILED DESCRIPTION

[0051] A scroll compressor 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings. The scroll compressor 100 according to this embodiment is used in, for example, a vehicle air conditioner.

[0052] Figure 1 1 is a longitudinal sectional view showing the schematic structure of the scroll compressor 100 according to the present embodiment. Figure 1 As shown, 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 part) 40, a motor 50, a bearing part 60, an inverter 70, and a gasket 80.

[0053] The bearing housing 10, the rear housing 20, and the front housing 30 constitute the outer shell of the scroll compressor 100 and are formed from an aluminum alloy. The bearing housing 10 is formed into a cylindrical shape along the axis X1, which serves as the center of rotation of the orbiting scroll 42. The bearing housing 10 has an internal space that accommodates the bearing portion 60 and the scroll compression mechanism 40.

[0054] The rear housing 20 seals one end of the bearing housing 10 along the axis X1 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 of the bearing housing 10 along the axis X1 and has an internal space for accommodating the motor 50 and the inverter 70. The internal space of the front housing 30, which houses the motor 50, communicates with the internal space of the bearing housing 10, which houses the bearing portion 60. The internal space for the motor 50 and the internal space for the inverter 70 are independent and not connected to each other.

[0055] like Figure 1 As shown, the end face 10a of the bearing housing 10 has an insertion hole 10b for inserting a positioning pin 20a. The end face 21 of the rear housing 20 also has an insertion hole 20b for inserting the positioning pin 20a. 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 positioned relative to each other. The plurality of positioning pins 20a position the rear housing 20 so that it does not rotate about the axis X1 relative to the bearing housing 10.

[0056] like Figure 1 As shown, the end plate 41A of the fixed scroll 41 has insertion holes for inserting the positioning pins 20a. The end surface 21 of the rear housing 20 also has insertion holes for inserting the positioning pins 20a. With the positioning pins 20a inserted into both the insertion holes of the fixed scroll 41 and the insertion holes of the rear housing 20, the end plate 41A of the fixed scroll 41 and the end surface 21 of the rear housing 20 are positioned facing each other. The plurality of positioning pins 20a position the fixed scroll 41 relative to the rear housing 20 so that it does not rotate about the axis X1.

[0057] The front housing 30 is provided with a suction port (not shown) for drawing in refrigerant. Refrigerant supplied from the outside is introduced into the interior space of the front housing 30 through the suction port. The refrigerant introduced into the front housing 30 is guided along the axis X1 by the motor 50 toward the scroll compression mechanism 40. The refrigerant drawn in through the suction port is a mixed refrigerant (fluid) containing lubricating oil and refrigerant gas.

[0058] The scroll compression mechanism 40 is disposed within the bearing housing 10 and rotates about the axis X1 to compress refrigerant gas. The scroll compression mechanism 40 includes a fixed scroll 41 fixed between the bearing housing 10 and the rear housing 20, and an orbiting scroll 42 meshing with the fixed scroll 41. The scroll compression mechanism 40 compresses refrigerant gas by using the driving force of the motor 50 to cause the orbiting scroll 42 to orbit relative to the fixed scroll 41.

[0059] The fixed scroll 41 includes a spiral wrap (first wall) 41B, which is a wall body erected on one side of an end plate (first end plate) 41A. A discharge port 41C for discharging refrigerant gas compressed by the fixed scroll 41 and the orbiting scroll 42 is formed in the end plate 41A.

[0060] The orbiting scroll 42 includes a spiral wrap (second wall) 42B, which is a wall body erected on one side of an end plate (second end plate) 42A. The orbiting scroll 42 is connected to an eccentric shaft (not shown) connected to the motor 50 and is supported for orbital and rotational motion via a rotation prevention mechanism (not shown). The orbiting scroll 42 meshes with the spiral wrap 41B of the fixed scroll 41, preventing rotation and supporting it for orbital and rotational motion.

[0061] like Figure 1As shown, the scroll compression mechanism 40 includes a reed valve 43 mounted on the fixed scroll 41 to close the discharge port 41C. When the pressure of the refrigerant gas in the compression chamber 40A is above a predetermined pressure, the reed valve 43 opens, directing the refrigerant gas discharged from the discharge port 41C to the discharge space 41D. The refrigerant gas directed to the discharge space 41D is then discharged to the outside through a discharge port (not shown).

[0062] The motor 50 is a device that causes the orbiting scroll 42 of the scroll compression mechanism 40 to orbit around the axis X1 relative to the fixed scroll 41. The motor 50 is connected to the orbiting scroll 42 via an eccentric shaft (not shown).

[0063] The bearing 60 supports a rotating shaft (not shown) that is rotated about the axis X1 by the motor 50. An eccentric shaft is provided at the end of the rotating shaft on the scroll compression mechanism 40 side.

[0064] The inverter 70 is a device that generates a driving voltage for driving the motor 50 and controls the rotation speed of the motor 50 .

[0065] The gasket 80 is disposed between the end surface 10 a of the bearing housing 10 on the rear housing 20 side and the end surface 21 of the rear housing 20 on the bearing housing 10 side, and forms a sealing area to prevent the refrigerant from flowing out from between the end surfaces 10 a and 21 .

[0066] Next, refer to Figures 2 to 5 Next, the structure of the rear housing 20 , which is enhanced in strength and reduced in weight in order to ensure a sealing force for accommodating the scroll compression mechanism 40 , will be described. Figure 2 yes Figure 1 A right side view of scroll compressor 100 is shown. Figure 3 yes Figure 2 The scroll compressor 100 is shown in a cross-sectional view taken along the line AA. Figure 4 yes Figure 2 The scroll compressor 100 is shown in a cross-sectional view taken along the line BB. Figure 5 yes Figure 2 The scroll compressor 100 is shown in a cross-sectional view taken along the line CC.

[0067] like Figures 2 to 5 As shown, the rear housing 20 has a bottom surface 22, a cylindrical portion 23, an annular portion 24 and a reinforcement portion 25. The bottom surface 22, the cylindrical portion 23, the annular portion 24 and the reinforcement portion 25 are integrally formed of an aluminum alloy. Figure 3 As shown, the end face 21 of the rear housing 20 is arranged along a plane perpendicular to the axis X1 and is arranged opposite to the bearing housing 10. Figure 4As shown, 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 away from the end surface 21 by L1 toward the bearing housing 10 .

[0068] The cylindrical portion 23 is arranged on the inner peripheral side of the bottom surface 22 relative to the axis X1, and is a portion that protrudes cylindrically relative to the bottom surface 22 in a direction away from the bearing housing 10. Figure 4 As shown, the length from the end surface 21 of the rear housing 20 to the top 23a of the cylindrical portion 23 is L2 which is longer than L1. Figure 2 and Figure 3 As shown, the maximum outer diameter of the cylindrical portion 23 with the axis X1 as the center is D1. Figure 3 As shown, the cylindrical portion 23 forms a discharge space 41D between the cylindrical portion 23 and the end plate 41A of the fixed scroll 41 , and the refrigerant discharged from the discharge port 41C is guided to the discharge space 41D.

[0069] The annular portion 24 is arranged on the outer peripheral side of the bottom surface 22 relative to the axis X1, and is a portion that protrudes in an annular shape relative to the bottom surface 22 in a direction away from the bearing housing 10. Figure 4 As shown, a distance L3 from the end surface 21 of the rear housing 20 to the top 24 a of the annular portion 24 is longer than L1 and shorter than L2 .

[0070] like Figure 2 As shown, on the annular portion 24, multiple locations in the circumferential direction CD ( Figure 2 Insertion holes 24b are formed (six locations in the figure) in the cylindrical portion 23 and the annular portion 24. These insertion holes 24b are used to insert fastening bolts 90, which generate a pressing force to press the rear housing 20 toward the bearing housing 10. A pair of reinforcement portions 25 are connected to the cylindrical portion 23 and the annular portion 24 at positions adjacent to and sandwiching the insertion holes 24b in the circumferential direction CD.

[0071] A fastening hole (not shown) is formed at the end of the front housing 30 on the bearing housing 10 side, and a male thread formed at the tip of a fastening bolt 90 is fastened to this fastening hole. By fastening the fastening bolt 90, which is inserted into the insertion hole 24b of the rear housing 20, in the fastening hole formed in the front housing 30, the bearing housing 10 is fixed in a state sandwiched between the rear housing 20 and the front housing 30 along the axis X1.

[0072] The reinforcements 25 are arranged at multiple locations in the circumferential direction CD around the axis X1 and protrude from the bottom surface 22 in a direction away from the bearing housing 10. The reinforcements 25 reinforce the rear housing 20 by connecting the cylindrical portion 23 and the annular portion 24, thereby increasing the strength.

[0073] like Figure 2 and Figure 5As shown in FIG. 1 , the reinforcement portion 25 is formed so that the width W1 in the circumferential direction CD gradually widens from the annular portion 24 toward the cylindrical portion 23. Figure 4 As shown, the reinforcement portion 25 is formed so as to gradually become longer from the annular portion 24 toward the cylindrical portion 23 along a length L4 relative to the axis X1 of the bottom surface 22 .

[0074] like Figure 2 and Figure 5 As shown, a seating surface 24c is formed around the insertion hole 24b. When the fastening bolt 90 is tightened to the front housing 30, the head of the fastening bolt 90 contacts the seating surface 24c. The seating surface 24c is a flat surface formed in a plane perpendicular to the axis X1 and has a generally annular shape when viewed from above. In the circumferential direction CD, the width W2 of the bottom surface 22 sandwiched between the pair of reinforcements 25 is narrower than the width W3 of the seating surface 24c, which contacts the head of the fastening bolt 90.

[0075] Next, refer to Figure 6 Next, the effect of the reinforcement portion 25 connecting the cylindrical portion 23 and the annular portion 24 to improve the strength of the rear housing 20 will be described. Figure 6 When viewed from the bearing housing 10 side Figure 2 The top view of the rear housing 20 is shown. Figure 6 As shown, the end surface 21 of the rear housing 20 has an inner end surface 21A in contact with the end plate 41A of the fixed scroll 41 and an outer end surface 21B in contact with the end surface 10 a of the bearing housing 10 via a gasket 80 .

[0076] Due to the tightening force generated by the tightening bolts 90 inserted into the insertion hole 24b of the rear housing 20 and tightened to the front housing 30, the inner end surface 21A contacts the end plate 41A of the fixed scroll 41, and the outer end surface 21B contacts the end surface 10a of the bearing housing 10 via the washer 80. The tightening force generated by the tightening bolts 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.

[0077] When a pressing force acts on the annular portion 24 on the outer circumference of the rear housing 20, where the insertion hole 24b is located, the annular portion 24 deforms toward the bearing housing 10 relative to the cylindrical portion 23. Therefore, in the rear housing 20 of this embodiment, the reinforcement portion 25 connects the cylindrical portion 23 and the annular portion 24, thereby increasing the strength of the rear housing 20. This prevents a reduction in the pressing force for securing the fixed scroll 41 and a reduction in the pressing force for securing the rear housing 20 to the front housing 30, which would otherwise be caused by the annular portion 24 deforming toward the bearing housing 10 relative to the cylindrical portion 23.

[0078] The functions and effects of the scroll compressor 100 according to the present embodiment described above will be described.

[0079] According to the scroll compressor 100 of this embodiment, a cylindrical portion 23 is disposed on the inner circumference of the bottom surface 22 of the rear housing 20 relative to the axis X1, which serves as the center of rotation of the orbiting scroll 42. An annular portion 24 is disposed on the outer circumference of the bottom surface 22 of the rear housing 20 relative to the axis X1. The cylindrical portion 23 protrudes away from the bearing housing 10 on the inner circumference of the bottom surface 22, and the annular portion 24 protrudes away from the bearing housing 10 on the outer circumference of the bottom surface 22. This improves the strength of the rear housing 20 compared to a case without the cylindrical portion 23 and the annular portion 24. Furthermore, since the cylindrical portion 23 and the annular portion 24 are connected by the reinforcement portion 25, the overall strength of the rear housing 20, including the cylindrical portion 23 and the annular portion 24, is improved. Furthermore, since the multiple reinforcement portions 25 are dispersed at multiple locations in the circumferential direction CD around the axis X1, the rear housing 20 can be made lighter than a case where the entire circumferential direction CD is reinforced. As described above, according to the scroll compressor 100 of the present embodiment, the strength of the casing can be increased to ensure the sealing force for accommodating the scroll compression mechanism 40 , and the casing can be reduced in weight.

[0080] According to the scroll compressor 100 of this embodiment, by gradually widening the circumferential CD width W1 of the reinforcement portion 25 from the annular portion 24 toward the cylindrical portion 23, the ratio of the connection area of ​​the reinforcement portion 25 relative to the entire circumference length of the cylindrical portion 23 can be increased, and the strength of the cylindrical portion 23 that forms the discharge space 41D where the pressure of the refrigerant acts can be increased.

[0081] According to the scroll compressor 100 of this embodiment, by gradually extending the length of the reinforcement portion 25 relative to the bottom surface 22 along the axis X1 from the annular portion 24 toward the cylindrical portion 23, the proportion of the area connected to the length L2 of the reinforcement portion 25 in the direction of the axis X1 of the cylindrical portion 23 can be increased, and the strength of the cylindrical portion 23 that forms the discharge space 41D where the pressure of the refrigerant acts can be increased.

[0082] According to the scroll compressor 100 of this embodiment, the pair of reinforcements 25 reinforce the position sandwiching the insertion hole 24b where the pressing force of the fastening bolts 90 acts in the circumferential direction CD, thereby improving the strength of the rear housing 20 near the insertion hole 24b.

[0083] According to the scroll compressor 100 of this embodiment, by fastening the fastening bolts 90 inserted into the insertion holes 24b of the rear housing 20 in the fastening holes formed in the front housing 30, the bearing housing 10 can be fixed in a state sandwiched between the rear housing 20 and the front housing 30 along the axis X1.

[0084] According to the scroll compressor 100 of this embodiment, in the circumferential direction CD, by making the width W2 of the bottom surface 22 clamped by the pair of reinforcement portions 25 narrower than the width W3 of the seat surface 24c contacted by the fastening bolt 90, the strength of the cylindrical portion 23 can be improved by the pair of reinforcement portions 25, and the rear housing 20 can be lightweight by providing the bottom surface 22.

[0085] The scroll compressor described in the present embodiment described above can be understood, for example, as follows.

[0086] The first housing is a cylindrical housing having an inner wall portion and an inner wall portion, and the cylindrical housing is a cylindrical housing having an inner wall portion and an inner wall portion. The cylindrical housing is a cylindrical housing having an inner wall portion and an inner wall portion. The cylindrical housing is a cylindrical housing having an inner wall portion and an inner wall portion. The cylindrical housing is a cylindrical housing having an inner wall portion and an inner wall portion. The cylindrical housing is a cylindrical housing having an inner wall portion and an inner wall portion. The body comprises: an end face, which is arranged along a plane perpendicular to the axis and is arranged opposite to the first shell; a bottom face, which is arranged along a plane perpendicular to the axis and is arranged at a position farther away from the first shell than the end face; a cylindrical portion, which is arranged on the inner circumferential side of the bottom face relative to the axis, protrudes cylindrically relative to the bottom face in a direction away from the first shell, and forms a discharge space between the cylindrical portion and the first end plate, which guides the refrigerant discharged from the discharge port; an annular portion, which is arranged on the outer circumferential side of the bottom face relative to the axis, protrudes annularly relative to the bottom face in a direction away from the first shell; and a reinforcing portion, which is arranged at multiple positions in the circumferential direction around the axis, protrudes relative to the bottom face in a direction away from the first shell, and connects the cylindrical portion and the annular portion.

[0087] According to the scroll compressor of the first embodiment of the present invention, as the orbiting scroll performs orbital rotation relative to the fixed scroll, fluid introduced from the outer circumference 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 casing, and guides the refrigerant discharged from the discharge port.

[0088] According to the scroll compressor of the first embodiment of the present invention, a cylindrical portion is arranged on the inner circumferential side of the bottom surface of the second housing relative to the axis serving as the center of rotation of the orbiting scroll, and an annular portion is arranged on the outer circumferential side of the bottom surface of the second housing relative to the axis. On the inner circumferential side of the bottom surface, the cylindrical portion protrudes away from the first housing, and on the outer circumferential side of the bottom surface, the annular portion protrudes away from the first housing. Therefore, the strength of the second housing is improved compared to a case where the cylindrical portion and the annular portion are not provided. In addition, because the cylindrical portion and the annular portion are connected by the reinforcement portion, the overall strength of the second housing including the cylindrical portion and the annular portion is improved. In addition, because the multiple reinforcement portions are dispersed at multiple locations in the circumferential direction around the axis, the second housing can be made lighter than a case where the entire circumferential direction is reinforced. In this way, according to the scroll compressor of the first embodiment of the present invention, the strength of the second housing that seals the first housing that accommodates the compression portion can be improved and the weight can be reduced in order to ensure the sealing force of the compression portion.

[0089] The scroll compressor according to the second aspect of the present invention further includes the following configuration in the first aspect: That is, the reinforcement portion is formed so that the width in the circumferential direction gradually increases from the annular portion toward the cylindrical portion.

[0090] According to the second embodiment of the scroll compressor of the present invention, by gradually expanding the circumferential width of the reinforcement portion from the annular portion toward the cylindrical portion, the proportion of the area connected to the entire circumference of the cylindrical portion can be increased, and the strength of the cylindrical portion that forms the discharge space where the pressure of the refrigerant acts can be increased.

[0091] The scroll compressor according to a third aspect of the present invention further comprises the following configuration in the first or second aspect: the reinforcement portion is formed so that the length of the reinforcement portion relative to the bottom surface along the axis gradually increases from the annular portion toward the cylindrical portion.

[0092] According to the third type of scroll compressor of the present invention, by gradually extending the length of the reinforcement portion along the axis relative to the bottom surface from the annular portion toward the cylindrical portion, the proportion of the area connected to the length of the reinforcement portion in the axial direction of the cylindrical portion can be increased, and the strength of the cylindrical portion that forms the discharge space where the pressure of the refrigerant acts can be increased.

[0093] The scroll compressor of a fourth aspect of the present invention further comprises the following structure in the first or second aspect: the annular portion has insertion holes formed at a plurality of locations in the circumferential direction, the insertion holes being inserted with fastening bolts that generate a pressing force for pressing the second housing toward the first housing, and the pair of reinforcement portions being connected to the cylindrical portion and the annular portion at positions adjacent to and sandwiching the insertion holes in the circumferential direction.

[0094] According to the scroll compressor of the fourth aspect of the present invention, the strength of the second housing near the insertion hole can be improved by reinforcing the position sandwiching the insertion hole where the pressing force by the fastening bolt easily acts in the circumferential direction with the pair of reinforcements.

[0095] A scroll compressor according to a fifth aspect of the present invention, in addition to the fourth aspect, further comprises the following structure: a motor that drives the orbiting scroll; and a third housing that houses the motor and has a fastening hole formed therein, into which the fastening bolt is fastened; the first housing being fixed along the axis in a state of being sandwiched between the second housing and the third housing by fastening the fastening bolt, which is inserted into the insertion hole of the second housing, to the fastening hole formed in the third housing.

[0096] According to the scroll compressor of the fifth aspect of the present invention, the first housing can be fixed in a state of being sandwiched between the second housing and the third housing along the axis by fastening bolts inserted into the insertion holes of the second housing to the fastening holes formed in the third housing.

[0097] The scroll compressor according to a sixth aspect of the present invention further comprises the following configuration in the fourth aspect: Specifically, in the circumferential direction, the width of the bottom surface sandwiched between the pair of reinforcements is narrower than the width of the seat surface with which the fastening bolt contacts.

[0098] According to the sixth embodiment of the scroll compressor of the present invention, in the circumferential direction, by making the width of the bottom surface clamped by a pair of reinforcement parts narrower than the width of the seat surface contacted by the fastening bolts, the strength of the cylindrical part can be improved by a pair of reinforcement parts and the second shell can be lightweighted by setting the bottom surface.

Claims

1. A scroll compressor, characterized in that: have: a compression portion having a fixed scroll and an orbiting scroll, the fixed scroll having a spiral first wall body erected on one side surface of a first end plate, the orbiting scroll having a spiral second wall body erected on one side surface of a second end plate, and the orbiting scroll meshing with the first wall body and supported so as to be prevented from rotating on its own and capable of orbiting and rotating; a first housing formed in a cylindrical shape along an axis serving as a center of rotation of the orbiting scroll and having an internal space for accommodating the compression portion; as well as a second housing that seals one end of the first housing along the axis, A discharge port is formed on the first end plate of the fixed scroll housed in the first housing. The discharge port discharges the fluid compressed by the fixed scroll and the orbiting scroll. The second housing has: an end surface, the end surface being arranged along a plane perpendicular to the axis and being arranged opposite to the first shell; a bottom surface arranged along a plane perpendicular to the axis and arranged at a position farther from the first housing than the end surface; a cylindrical portion disposed on an inner circumferential side of the bottom surface relative to the axis, projecting cylindrically relative to the bottom surface in a direction away from the first shell, and forming a discharge space between the cylindrical portion and the first end plate for guiding the refrigerant discharged from the discharge port; an annular portion, the annular portion being arranged on an outer peripheral side of the bottom surface relative to the axis and protruding in an annular shape relative to the bottom surface in a direction away from the first housing; as well as The reinforcing portion is arranged at a plurality of locations in the circumferential direction around the axis, protrudes in a direction away from the first housing relative to the bottom surface, and connects the cylindrical portion and the annular portion.

2. The scroll compressor according to claim 1, wherein The reinforcement portion is formed so that the circumferential width gradually increases from the annular portion toward the cylindrical portion.

3. The scroll compressor according to claim 1 or 2, characterized in that: The reinforcement portion is formed so that the length along the axis relative to the bottom surface gradually increases from the annular portion toward the cylindrical portion.

4. The scroll compressor according to claim 1 or 2, characterized in that: Insertion holes are formed in the annular portion at a plurality of locations in the circumferential direction. Fastening bolts are inserted into the insertion holes. The fastening bolts generate a pressing force that presses the second housing toward the first housing. The pair of reinforcing portions are adjacent to the insertion hole in the circumferential direction and connected to the cylindrical portion and the annular portion at positions sandwiching the insertion hole.

5. The scroll compressor according to claim 4, characterized in that have: a motor that drives the orbiting scroll; and a third housing, which accommodates the motor and is formed with a fastening hole in which the fastening bolt is fastened; The first housing is fixed in a state of being sandwiched between the second housing and the third housing along the axis by fastening the fastening bolt inserted into the insertion hole of the second housing in the fastening hole formed in the third housing.

6. The scroll compressor according to claim 4, wherein: In the circumferential direction, the width of the bottom surface sandwiched by the pair of reinforcement portions is narrower than the width of the seat surface with which the fastening bolt contacts.

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