EP3567250A1

EP3567250A1 - Compressor system

Info

Publication number: EP3567250A1
Application number: EP19170800.7A
Authority: EP
Inventors: Yohei Hotta; Hajime Sato; Shunsuke Yakushiji; Shohei TERASAKI
Original assignee: Mitsubishi Heavy Industries Thermal Systems Ltd
Current assignee: Mitsubishi Heavy Industries Thermal Systems Ltd
Priority date: 2018-05-11
Filing date: 2019-04-24
Publication date: 2019-11-13
Also published as: JP2019196770A; JP7068030B2

Abstract

A compressor system (10) includes: a compressor (11) having a compression unit that is configured to compress a fluid and a housing (31) that stores the compression unit therein; a pressure container (16) provided in parallel with the compressor (11) and having a tubular portion that extends in an up-down direction and a bottom portion (83) for closing a lower end of the tubular portion; a fixed portion (18) for fixing the tubular portion (81) of the pressure container (16) to an outer surface of the housing (31); a piping (26) of which one end is connected to the housing (31) and the other end is connected to the bottom portion (83) of the pressure container (16); and a base member (32) that supports the compressor (11) and the bottom portion 83 of the pressure container (16) and has greater rigidity than that of the piping (26).

Description

Technical Field

The present invention relates to a compressor system.

Background Art

A compressor is provided with a compression unit which compresses a fluid in a housing. There is a case where, on the outside of the housing of such a compressor, a pressure container, such as an oil pod for storing lubricating oil, an accumulator, or an oil separator is provided.
PTL 1 discloses a configuration in which a pressure container, such as an accumulator or an oil pod, is provided on the outside of a housing of a compressor. The pressure containers are respectively fixed via a bracket to the outer peripheral surface of the housing of the compressor. Further, the pressure container and the compressor are connected to each other via a piping through which a refrigerant, oil, or the like flows.

Citation List

Patent Literature

[PTL 1] Japanese Unexamined Patent Application, First Publication No. 2017-180275

Summary of Invention

Technical Problem

Incidentally, when the compressor operates, vibration of the compressor is transmitted to the pressure container via the bracket. Depending on an eigenvalue (eigenfrequency) of the pressure container, there is a case where vibration (resonance) occurs in a mode in which an end portion of the pressure container largely shakes due to the vibration transmitted from the compressor. When such vibration occurs, there is a case where a load is applied to the piping that connects the pressure container and the compressor to each other, and the piping is damaged.
The present invention provides a compressor system capable of limiting vibration that occurs in a pressure container due to vibration of a compressor.

Solution to Problem

A compressor system according to one aspect of the present invention includes: a compressor having a compression unit that is configured to compress a fluid and a housing that stores the compression unit therein; a pressure container provided in parallel with the compressor and having a tubular portion that extends in an up-down direction and a bottom portion for closing a lower end of the tubular portion; a fixed portion for fixing the tubular portion of the pressure container to an outer surface of the housing; a piping of which one end is connected to the housing and the other end is connected to the bottom portion of the pressure container; and a base member that supports the compressor and the bottom portion of the pressure container and has greater rigidity than rigidity of the piping.
With such a configuration, in the pressure container, the tubular portion is fixed to the housing by the fixed portion, and the bottom portion is supported by the base member. Accordingly, it is possible to firmly fix the pressure container to the compressor at a position separated in the up-down direction. Therefore, it becomes difficult for vibration of the compressor to be transmitted to the pressure container.
In addition, in the compressor system according to a second aspect of the present invention, in the first aspect, the base member may include an external leg portion that is fixed to the housing and supports the compressor, and a bracket fixed to the bottom portion of the pressure container and connected to the external leg portion.
With such a configuration, the pressure container is indirectly connected to the compressor via a plurality of members of the bracket and the external leg portion. Accordingly, the vibration transmitted from the compressor to the pressure container is further attenuated by the base member. As a result, the vibration transmitted to the pressure container is further limited.
In addition, in the compressor system according to a third aspect of the present invention, in the second aspect, the bracket may have a shape of a plate, and have a bent portion curved between a first fixed portion fixed to the pressure container and a second fixed portion connected to the external leg portion.
With such a configuration, the rigidity of the bracket is enhanced.
In addition, in the compressor system according to a fourth aspect of the present invention, in the second aspect or the third aspect, the external leg portion may include an external leg portion main body fixed to a lower portion of the housing, and a reinforcement rib connected to an outer peripheral portion of the external leg portion main body at a position deviating from the housing when viewed from the up-down direction, and the bracket may be fixed to the reinforcement rib.
With such a configuration, it is possible to support the pressure container more firmly. Accordingly, it is possible to limit the vibration that occurs in the pressure container due to the vibration of the compressor.
Further, in the compressor system according to a fifth aspect of the present invention, in any one of the second to the fourth aspects, the bracket may be welded to the external leg portion.
With such a configuration, it is possible to firmly fix the bracket and the external leg portion to each other, and to support the pressure container more stably.
Further, in the compressor system according to a sixth aspect of the present invention, in any one of the second to the fifth aspects, the bracket may be formed of the same material as a material of the external leg portion, and a plate thickness of the bracket is the same as a thickness of the external leg portion.
With such a configuration, it is possible to bring the rigidities of the bracket and the external leg portion closer to each other. In a case where the rigidity of the bracket is lower than that of the base member, the vibration is likely to occur in the bracket due to the transmission of the vibration of the compressor. In addition, in a case where the rigidity of the base member is lower than that of the bracket, the vibration is likely to occur in the base member due to the transmission of the vibration of the compressor. However, by bringing the rigidities of the bracket and the external leg portion closer to each other, it is possible to limit the occurrence of the vibration in the bracket or the external leg portion.
In addition, in the compressor system according to a seventh aspect of the present invention, in any one of the first to the sixth aspects, the base member may be fixed to the bottom portion of the pressure container at a position at least partially overlapping the center of gravity of the pressure container when viewed from the up-down direction.
With such a configuration, it is possible to limit the lower end portion where an amplitude of the vibration transmitted from the compressor via the fixed portion becomes likely to be the largest in the pressure container. Therefore, it is possible to efficiently limit the vibration that occurs in the pressure container.

Advantageous Effects of Invention

According to the present invention, it becomes possible to limit the vibration that occurs in the pressure container due to the vibration of the compressor.

Brief Description of Drawings

FIG. 1 is a sectional view of a compressor system according to an embodiment of the present invention.
FIG. 2 is a view of the compressor system shown in FIG. 1 when viewed from below.
FIG. 3 is a sectional view showing a joined part between an external leg portion and a bracket in the compressor system shown in FIG. 1.

Description of Embodiments

With reference to FIG. 1, a compressor system 10 according to an embodiment of the present invention will be described. FIG. 1 is a sectional view of a compressor system according to the embodiment of the present invention. FIG. 2 is a view of the compressor system shown in FIG. 1 when viewed from below. FIG. 3 is a sectional view showing a joined part between an external leg portion and a bracket in the compressor system shown in FIG. 1.
In addition, in FIG. 1, as an example of a compressor 11, the following description will be given taking a case where a closed type two-stage compressor is used, as an example. As shown in FIG. 1, the compressor system 10 includes the compressor 11, a suction pipe 13, an accumulator 14, an oil pod (pressure container) 16, a pressure equalizing pipe 25, an oil supply pipe (piping) 26, and a base member 32.
The compressor 11 includes a housing 31, a rotational shaft 33, a discharge pipe 40, an electric motor 42, a rotary compression unit (compression unit) 43, a scroll compression unit (compression unit) 44, and an injection pipe 45.
The housing 31 extends in an up-down direction Z along an axial line Ax of the rotational shaft 33. In addition, in FIG. 1, the up-down direction Z indicates a vertical direction. The housing 31 includes a cylindrical housing main body 51, a housing upper lid portion 52 for closing the opening above the housing main body 51, and a housing lower lid portion 53 for closing the lower opening of the housing main body 51. The housing 31 partitions an internal space 31A that extends in the up-down direction Z. An oil reservoir O1 is formed by accumulating oil (lubricating oil) A in the bottom portion of the housing lower lid portion 53 from the lower portion of the housing main body 51.
The rotational shaft 33 is accommodated in the housing 31. The rotational shaft 33 is disposed in the internal space 31A such that an extending direction of the axial line Ax is an up-down direction Z. The rotational shaft 33 is supported in a state of being rotatable around the axial line Ax by a bearing fixed to the housing 31.
Apart of the discharge pipe 40 is disposed in the housing 31, and the remaining portion is disposed on the outside of the housing 31. The discharge pipe 40 passes through the housing upper lid portion 52. One end of the discharge pipe 40 has reached a space where the refrigerant (for example, a fluid, such as a gas including carbon dioxide) compressed by the scroll compression unit 44 is discharged. The other end of the discharge pipe 40 is disposed on the outside of the housing 31. The discharge pipe 40 includes the oil A and discharges a compressed refrigerant R to the outside of the housing 31.
The electric motor 42 is accommodated in the housing 31. The electric motor 42 is disposed between the rotary compression unit 43 and the scroll compression unit 44 in the up-down direction Z. A power source (not shown) is connected to the electric motor 42. The electric motor 42 rotates the rotational shaft 33 by the electric power from the power source.
The rotary compression unit 43 is provided in the lower portion in the housing 31. The rotary compression unit 43 is disposed below the electric motor 42. The refrigerant R compressed by the rotary compression unit 43 is sent to the scroll compression unit 44.
The scroll compression unit 44 is accommodated in the housing 31 and is disposed above the electric motor 42. The refrigerant R compressed in a compression chamber B of the scroll compression unit 44 is discharged to the outside of the housing 31 via the discharge pipe 40.
The injection pipe 45 is a path for introducing the refrigerant R into the housing 31 from a supply source (not shown).
The accumulator 14 is provided on the outside of the compressor 11 along the housing 31. The accumulator 14 separates a liquid phase from the refrigerant R and supplies the gas phase of the refrigerant R to the rotary compression unit 43 through the suction pipe 13. The accumulator 14 includes a hollow accumulator main body 19 that extends in a direction of an axial line Ax2 and a first ring bracket 15.
The accumulator main body 19 has a bottomed tubular shape such that the axial line Ax2 extends in the up-down direction Z. The accumulator main body 19 is fixed to the outer peripheral surface of the housing main body 51 of the housing 31 via the annular first ring bracket 15.
The first ring bracket 15 is provided above the center position of the accumulator main body 19 in the up-down direction Z. The first ring bracket 15 includes a first ring portion 15a continuous in a peripheral direction along the outer peripheral surface of the accumulator main body 19 and a first belt portion 15b.
The first ring portion 15a is bolted to a first stay 31s fixed to the outer peripheral surface of the housing main body 51. The first belt portion 15b is formed of a rubber material and wound around the accumulator main body 19. The first ring portion 15a is attached to the accumulator main body 19 from above the first belt portion 15b.
The oil pod 16 is provided on the outside of the compressor 11 along the housing 31. The oil pod 16 is disposed on the side opposite to the accumulator 14 so as to be disposed with the compressor 11 interposed therebetween when viewed from the up-down direction Z. In the oil pod 16, the oil A is stored. The oil pod 16 includes a hollow oil pod main body 80 that extends around an axial line Ax3, a second ring bracket (fixed portion) 18, an oil introduction pipe 20, a pressure equalizing pipe 25, and an oil supply pipe 26.
In addition, in FIG. 1, an oil supply source for supplying the oil A from the outside of the compressor system 10 may be provided in the oil pod 16 (not shown).
The oil pod main body 80 has a bottomed tubular shape such that the axial line Ax3 extends in the up-down direction Z. The oil pod main body 80 includes a pod main body portion (tubular portion) 81, a pod upper lid portion 82, and a pod lower lid portion (bottom portion) 83.
The pod main body portion 81 is a tubular member that extends in the up-down direction Z along the axial line Ax3. In the pod main body portion 81, the upper and lower ends are opened respectively. The pod upper lid portion 82 is fixed to the pod main body portion 81 so as to close the opening of the upper end of the pod main body portion 81. The pod lower lid portion 83 is fixed to the pod main body portion 81 so as to close the opening of the lower end of the pod main body portion 81. The pod upper lid portion 82 and the pod lower lid portion 83 are attached to the pod main body portion 81 by welding.
The pod main body portion 81 is fixed to the outer peripheral surface of the housing main body 51 of the housing 31 via an annular second ring bracket (fixed portion) 18.
The second ring bracket 18 is provided above the center position of the pod main body portion 81 in the up-down direction Z. The second ring bracket 18 includes a second ring portion 18a continuous in the peripheral direction along the outer peripheral surface of the pod main body portion 81 and a second belt portion 18b.
The second ring portion 18a is bolted to a second stay 31t fixed to the outer peripheral surface of the housing main body 51. The second belt portion 18b is formed of the same rubber material as that of the first belt portion 15b and wound around the pod main body portion 81. The second ring portion 18a is attached to the pod main body portion 81 from above the second belt portion 18b.
The oil introduction pipe 20 is provided below the second ring bracket 18 and in the vicinity of the center of the pod main body portion 81 in the up-down direction Z. The oil introduction pipe 20 is a piping for introducing the oil A into the oil pod 16.
The pressure equalizing pipe 25 is a pipe for keeping the internal pressure of the housing 31 and the internal pressure of the oil pod main body 80 in balance. One end of the pressure equalizing pipe 25 communicates with the inside of the housing 31. The other end of the pressure equalizing pipe 25 is connected to the pod upper lid portion 82 so as to communicate with the inside of the oil pod 16.
The oil supply pipe 26 is connected to the housing 31 and the oil pod 16 in a state where the oil A stored in the lower portion in the housing 31 and the oil A stored in the oil pod 16 can mutually circulate. One end of the oil supply pipe 26 is connected to the lower end (specifically, the housing lower lid portion 53) of the housing 31. The other end of the oil supply pipe 26 is connected to the lower end (specifically, the pod lower lid portion 83 which will be described later) of the oil pod 16. Accordingly, the oil supply pipe 26 communicates with the inside of the housing 31 and the inside of the oil pod main body 80. As the oil supply pipe 26, for example, a cylindrical piping can be used.
As shown in FIGS. 1 to 3, the base member 32 is fixed to the outer peripheral surface of the housing lower lid portion 53 and the lower end of the pod lower lid portion 83. The base member 32 supports the compressor 11 from the lower side and supports the oil pod 16 from the lower side. The base member 32 has higher rigidity than that of the oil supply pipe 26. The base member 32 includes an external leg portion 32a and a bracket 91.
The external leg portion 32a is fixed to the compressor 11 and supports the compressor 11 with respect to an installation surface. The external leg portion 32a includes an external leg portion main body 32m and reinforcement ribs 32r.
The external leg portion main body 32m has a shape of a flat plate that extends in a direction orthogonal to the axial line Ax. As shown in FIGS. 2 and 3, the external leg portion main body 32m has a substantially rectangular shape when viewed from the up-down direction Z. A through-hole 32h having an inner diameter smaller than an outer diameter of the housing lower lid portion 53 is formed in the center portion of the external leg portion main body 32m when viewed from the up-down direction Z. The housing lower lid portion 53 has a hemispherical dome-shaped portion 53a curved such that the outer diameter thereof gradually decreases downward. In the through-hole 32h, the dome-shaped portion 53a is inserted from above, and a part of the center portion thereof protrudes downward from the through-hole 32h. The dome-shaped portion 53a is welded to the external leg portion main body 32m at a plurality of locations in the peripheral direction at a part where the dome-shaped portion 53a abuts against an inner peripheral edge of the through-hole 32h. Accordingly, the external leg portion main body 32m is fixed to the housing 31. At four corners of the external leg portion main body 32m, a rubber leg attachment hole 34 is formed into which a rubber leg (not shown) is inserted when placing the compressor system 10 on the installation surface of an object to be attached. In addition, the reinforcement ribs 32r are integrally formed on four sides of the external leg portion main body 32m.
The reinforcement ribs 32r extend downward so as to be orthogonal to the external leg portion main body 32m. The reinforcing ribs 32r are connected to the outer peripheral portion of the external leg portion main body 32m at a position deviated from the housing 31 when viewed from the up-down direction Z.
The bracket 91 is fixed to the pod lower lid portion 83 and the external leg portion 32a. The bracket 91 is a plate-like member formed of the same material and with the same plate thickness as those of the external leg portion 32a. The bracket 91 integrally includes a first fixed portion 91a, a second fixed portion 91b, and a bent portion 91c.
The first fixed portion 91a is joined to the pod lower lid portion 83 by welding. The first fixed portion 91a is at the position overlapping the center portion of the pod lower lid portion 83 through which the axial line Ax3 passes when viewed from the up-down direction Z, and is welded to the lower surface orienting toward the lower side of the pod lower lid portion 83 in the up-down direction Z. In other words, the bracket 91 is disposed so as to overlap the center of gravity of the oil pod main body 80 vertically downward.
The second fixed portion 91b is connected to the reinforcement ribs 32r. The second fixed portion 91b and the reinforcement ribs 32r are fastened by fastening bolts 93 and joined to each other by welding.
The bent portion 91c is curved so as to be bent substantially at a right angle between the first fixed portion 91a and the second fixed portion 91b.
When fixing the bracket 91 to the external leg portion 32a, firstly, the bracket 91 and the reinforcement ribs 32r are connected to each other by the fastening bolts 93, and the bracket 91 with respect to the external leg portion 32a is temporarily stopped in a state of being positioned. Thereafter, the bracket 91 and the reinforcement ribs 32r are welded and fixed in a non-movable state.
Further, it is preferable that the bracket 91 is formed as short as possible. Accordingly, a holding force of the oil pod main body 80 is enhanced, and the effect of limiting vibration and the effect of limiting displacement in the direction of rotation around the axial line Ax3 are enhanced.
According to the compressor system 10 as described above, in the oil pod main body 80, the upper pod main body portion 81 is fixed to the housing 31 by the second ring bracket 18 and the lower pod lower lid portion 83 is supported by the base member 32. Accordingly, it is possible to firmly fix the oil pod main body 80 to the compressor 11 at a position separated in the up-down direction Z. Therefore, it becomes difficult for the vibration of the compressor 11 to be transmitted to the oil pod main body 80. Accordingly, it is possible to limit the vibration that occurs in the oil pod 16 due to the vibration of the compressor 11. As a result, it becomes possible to limit damage to the oil supply pipe 26 provided between the compressor 11 and the oil pod 16.
Further, the lower side of the oil pod main body 80 is connected to the base member 32 placed on the installation surface via the rubber leg. Accordingly, the vibration transmitted from the compressor 11 to the oil pod main body 80 is attenuated by the base member 32. In this manner, it is possible to effectively limit the vibration that occurs in the oil pod 16 due to the vibration of the compressor 11, and to limit the damage to the oil supply pipe 26 provided between the compressor 11 and the oil pod 16.
In addition, the oil pod main body 80 is fixed to the external leg portion 32a fixed to the compressor 11 via the bracket 91. Accordingly, the oil pod 16 is indirectly connected to the compressor 11 via a plurality of members of the bracket 91 and the external leg portion 32a. Accordingly, the vibration transmitted from the compressor 11 to the oil pod main body 80 is further attenuated by the base member 32. As a result, the vibration transmitted to the oil pod 16 is further limited.
Further, the bracket 91 includes the bent portion 91c between the first fixed portion 91a joined to the oil pod main body 80 and the second fixed portion 91b joined to the base member 32. Accordingly, the rigidity of the bracket 91 is enhanced, and the oil pod main body 80 can be supported more firmly.
In addition, the bracket 91 is joined to the part of the reinforcement ribs 32r having high rigidity in the base member 32 by welding. As a result, it is possible to more firmly fix the bracket 91 and the external leg portion 32a and to more stably and firmly support the oil pod main body 80 compared to a case where the bracket 91 is simply fixed only with the fastening bolts 93 or a case where the bracket 91 is fixed to the external leg portion main body 32m. Accordingly, it is possible to limit the vibration that occurs in the oil pod 16 due to the vibration of the compressor 11.
Furthermore, the bracket 91 is welded to the reinforcement ribs 32r after being connected by the fastening bolts 93. Accordingly, when the bracket 91 is connected to the reinforcement ribs 32r, the bracket 91 can be temporarily stopped in a state of positioning the bracket 91 to the reinforcement ribs 32r by the fastening bolts 93. Therefore, the bracket 91 and the reinforcement ribs 32r can be welded easily and reliably.
In addition, the bracket 91 is a member formed of the same material and with the same plate thickness as those the external leg portion 32a. Accordingly, the rigidity of the bracket 91 can be brought closer to the rigidity of the external leg portion 32a. Therefore, it is possible to limit the vibration in the bracket 91 to the utmost.
In addition, in the oil pod main body 80, the bracket 91 is fixed at a position overlapping the center of gravity of the oil pod main body 80 of the lower end of the pod lower lid portion 83 which is the most separated from the second ring bracket 18 in the up-down direction Z. Therefore, it is possible to limit the lower end portion where the amplitude of the vibration to be transmitted from the compressor 11 via the second ring bracket 18 becomes likely to be the largest in the oil pod main body 80. Therefore, it is possible to efficiently limit the vibration that occurs in the oil pod main body 80.
In addition, the bracket 91 is a member formed of the same material and with the same plate thickness as those the external leg portion 32a. Accordingly, the rigidities of the bracket 91 and the external leg portion 32a can be brought closer to each other. Furthermore, it is preferable to set the material, the plate thickness, and the like such that the rigidities (cross-sectional secondary moment) are the same as each other in the bracket 91 and the external leg portion 32a. In a case where the rigidity of the bracket 91 is lower than that of the external leg portion 32a, the vibration is likely to occur in the bracket 91 due to the transmission of the vibration of the compressor 11. In addition, in a case where the rigidity of the external leg portion 32a is lower than that of the bracket 91, the vibration is likely to occur in the external leg portion 32a due to the transmission of the vibration of the compressor 11. However, by bringing the rigidities of the bracket 91 and the external leg portion 32a closer to each other, it is possible to limit the occurrence of the vibration in one of the bracket or the external leg portion.
While preferred embodiments of the invention have been described and shown above, it should be understood that these are exemplary examples of the invention and are not to be considered as limiting. Additions, omissions, substitutions, and other modifications can be made without departing from the spirit or scope of the present invention. Accordingly, the invention is not to be considered as being limited by the foregoing description, and is only limited by the scope of the appended claims.
For example, in the above-described embodiment, the oil pod main body 80 is connected to the base member 32 via the bracket 91, but the oil pod main body 80 may be fixed directly to the base member 32 without passing through the bracket 91.
In addition, although only the compressor 11 and the oil pod 16 are connected to the base member 32 of the compressor 11, the present invention is not limited to such a structure. For example, the accumulator 14 may be used as another pressure container, and the compressor 11 and the accumulator 14 may have a structure fixed to the base member 32 similarly to a case of the oil pod 16.
According to the present invention, it is possible to limit the vibration that occurs in the pressure container due to the vibration of the compressor.
While preferred embodiments of the invention have been described and shown above, it should be understood that these are exemplary of the invention and are not to be considered as limiting. Additions, omissions, substitutions, and other modifications can be made without departing from the spirit or scope of the present invention. Accordingly, the invention is not to be considered as being limited by the foregoing description, and is only limited by the scope of the appended claims.

Industrial Applicability

Reference Signs List

10: Compressor system
3: Compressor
13: Suction pipe
14: Accumulator
15: First ring bracket
15a: First ring portion
15b: First belt portion
16: Oil pod
18: Second ring bracket (fixed portion)
18a: Second ring portion
18b: Second belt portion
19: Accumulator main body
20: Oil introduction pipe
25: Pressure equalizing pipe
26: Oil supply pipe (piping)
31: Housing
31A: Internal space
31s: First stay
31t: Second stay
32: Base member
32a: External leg portion
32m: External leg portion main body
32h: Through-hole
32r: Reinforcement rib
33: Rotational shaft
34: Rubber leg attachment hole
40: Discharge pipe
42: Electric motor
43: Rotary compression unit (compression unit)
44: Scroll compression unit (compression unit)
45: Injection pipe
51: Housing main body
52: Housing upper lid portion
53: Housing lower lid portion
53a: Dome-shaped portion
80: Oil pod main body
81: Pod main body portion (tubular portion)
82: Pod upper lid portion
83: Pod lower lid portion (bottom portion)
91: Bracket
91a: First fixed portion
91b: Second fixed portion
91c: Bent portion
93: Fastening bolt
A: Oil
Ax: Axial line (center axis)
Ax2: Axial line
Ax3: Axial line
B: Compression chamber
R: Refrigerant (fluid)

Claims

A compressor system (10) comprising:
a compressor (11) having a compression unit that is configured to compress a fluid and a housing (31) that stores the compression unit therein;

a pressure container (16) provided in parallel with the compressor and having a tubular portion (81) that extends in an up-down direction and a bottom portion (83) for closing a lower end of the tubular portion;

a fixed portion (18) for fixing the tubular portion of the pressure container to an outer surface of the housing;

a piping (26) of which one end is connected to the housing and an other end is connected to the bottom portion of the pressure container; and

a base member (32) that supports the compressor and the bottom portion of the pressure container and has greater rigidity than rigidity of the piping.
The compressor system according to Claim 1,
wherein the base member (32) includes
an external leg portion (32a) that is fixed to the housing and supports the compressor, and

a bracket (91) that is fixed to the bottom portion of the pressure container and connected to the external leg portion.
The compressor system according to Claim 2,
wherein the bracket (91)
has a shape of a plate, and

has a bent portion (91c) curved between a first fixed portion (91a) fixed to the pressure container and a second fixed portion (91b) connected to the external leg portion (32a).
The compressor system according to Claim 2 or 3,
wherein the external leg portion (32a) includes
an external leg portion main body (32m) fixed to a lower portion of the housing, and

a reinforcement rib (32r) connected to an outer peripheral portion of the external leg portion main body at a position deviating from the housing when viewed from the up-down direction, and

wherein the bracket is fixed to the reinforcement rib.
The compressor system according to any one of Claims 2 to 4,
wherein the bracket (91) is welded to the external leg portion (32a).
The compressor system according to any one of Claims 2 to 5,
wherein the bracket (91) is formed of the same material as a material of the external leg portion (32a), and a plate thickness of the bracket is the same as a thickness of the external leg portion.
The compressor system according to any one of Claims 1 to 6,
wherein the base member (32) is fixed to the bottom portion (83) of the pressure container (16) at a position at least partially overlapping the center of gravity of the pressure container when viewed from the up-down direction.