WO2024047969A1

WO2024047969A1 - Packaged gas compressor

Info

Publication number: WO2024047969A1
Application number: PCT/JP2023/019183
Authority: WO
Inventors: 祐吾時野; 寿和原島; 竜亮大城; 尚博太田; 雄太梶江
Original assignee: 株式会社日立産機システム
Priority date: 2022-08-31
Filing date: 2023-05-23
Publication date: 2024-03-07
Also published as: JP2024033811A

Abstract

This packaged gas compressor comprises a compressor main body, a cooling fan, an air-cooled heat exchanger, and a housing that houses the compressor main body, the cooling fan, and the air-cooled heat exchanger. The housing includes a suction port for cooling air on a side surface surrounding constituent equipment. The compressor main body is disposed in a lower portion in the housing. The cooling fan is disposed above the compressor main body with a rotational axis of the cooling fan being orthogonal to a height direction of the housing. The heat exchanger is disposed at the position of a suction side of the cooling fan. The suction port is provided overlapping the compressor main body in a height direction of the housing and provided, for the heat exchanger and the cooling fan, closer to the cooling fan than to the heat exchanger. The compressor main body is disposed, in an extension direction of the rotational axis of the cooling fan, overlapping an area between the heat exchanger and an opposing surface of the side surfaces of the housing that opposes a cooling air inflow side of the heat exchanger.

Description

Packaged gas compressor

The present invention relates to a packaged gas compressor, and more particularly, to a packaged gas compressor that air-cools components inside the package.

A packaged gas compressor consists of a compressor body that compresses gas, a prime mover that drives the compressor body, a heat exchanger that cools the compressed gas discharged from the compressor body or oil supplied to the compressor body, etc. The components are housed inside the package. In packaged gas compressors, heat is often dissipated by circulating cooling air generated by a cooling fan inside the package in order to prevent component equipment from becoming too hot.

As a package type gas compressor that circulates cooling air inside a package, there is one described in Patent Document 1, for example. In the package compressor described in Patent Document 1, a first cooling air inlet and a first cooling air inlet are provided on one side and the other side of a casing (package) in which a main body unit in which a compressor main body and a motor are integrated is housed, respectively. A second cooling air inlet is formed, and a cooling air outlet is formed on the upper surface of the housing. Further, a cooling fan is housed inside a fan duct provided in the upper part of the housing, and the cooling fan is arranged so that its rotation axis extends in the vertical direction. An air-cooled heat exchanger is arranged above the outlet of the fan duct and below the cooling air outlet. The package compressor is configured such that the cooling fan induces a flow of cooling air taken in from the first and second cooling air inlets and discharged from the cooling air outlet.

International Publication No. 2017/195242

In the package compressor described in Patent Document 1, cooling performance for cooling the main unit is improved by forming a plurality of cooling air inlets (intake ports) in the housing (package) to increase the total opening area of the package. We are working to improve this. However, as the total opening area of the intake port increases, the noise emitted from the intake port also tends to increase. In the package compressor described in Patent Document 1, if the total opening area of the intake port is reduced in order to reduce noise without changing the arrangement of the components inside the package, the cooling air taken into the inside of the package can be reduced. There is a concern that cooling performance may deteriorate due to a decrease in the flow rate. Therefore, it is required to achieve both noise reduction and cooling performance.

The present invention has been made to solve the above problems, and its purpose is to provide a packaged gas compressor that can maintain sound cooling performance while reducing noise. It is.

The present application includes multiple means for solving the above problems. One example is a compressor body that compresses gas, a cooling fan that generates cooling air by rotating around an axis of rotation, and a cooling fan that generates cooling air by passing through it and being introduced from the compressor body. An air-cooled heat exchanger that cools fluid; and a housing that houses the compressor main body, the cooling fan, and the heat exchanger, the housing housing the compressor main body, the cooling fan, and the heat exchanger. the cooling air intake port is provided on a side surface surrounding the heat exchanger, the compressor main body is disposed at a lower portion within the housing, the cooling fan is disposed above the compressor main body, and , the rotation axis is arranged perpendicular to the height direction of the casing, the heat exchanger is arranged at a position on the suction side of the cooling fan, and the intake port is arranged perpendicular to the height direction of the casing. is provided so as to overlap with the compressor main body, and is provided at a position closer to the cooling fan than the heat exchanger among the heat exchanger and the cooling fan, and the compressor main body is located closer to the cooling fan than the heat exchanger. arranged so as to overlap, in the extending direction of the rotational axis, a region between the heat exchanger and an opposing surface of the side surface of the casing that faces the cooling air inflow side of the heat exchanger. ing.

According to an example of the present invention, the cooling fan is placed above the compressor main body, and the rotation axis is perpendicular to the height direction of the housing, and the heat exchanger is placed on the suction side of the cooling fan. , and by providing the intake port at a position closer to the cooling fan than the heat exchanger and at the height of the compressor body, the flow of cooling air is folded back in a U-shape from the bottom to the top of the housing, and the heat exchanger is diverted to flow in a wide area. Furthermore, by arranging the compressor body so as to overlap the area between the heat exchanger and the side surface of the housing, the compressor body is located in the area of the cooling air that is folded back in a U-shape, so the axis of rotation can be adjusted. The cooling performance for the compressor main body can be improved more than in the case of a configuration in which the cooling fan is arranged to extend in the height direction of the casing and the heat exchanger is arranged on the downstream side of the cooling fan. Therefore, it is possible to maintain the soundness of the cooling performance while reducing noise by reducing the opening area of the intake port.
Problems, configurations, and effects other than those described above will be made clear by the following description of the embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a packaged gas compressor according to a first embodiment of the present invention, viewed from the back side. FIG. 2 is a rear view of the packaged gas compressor according to the first embodiment shown in FIG. 1. FIG. FIG. 2 is a top view of the packaged gas compressor according to the first embodiment shown in FIG. 1. FIG. FIG. 2 is a view of a cooling fan and an intake/exhaust duct that constitute a part of the packaged gas compressor according to the first embodiment shown in FIG. 1, viewed from the right side panel side. It is a top view showing the package type gas compressor concerning the modification of the 1st embodiment of the present invention. FIG. 3 is a top view showing a packaged gas compressor according to a second embodiment of the present invention.

Hereinafter, embodiments of a packaged gas compressor according to the present invention will be illustrated and described using the drawings. In this embodiment, a screw compressor will be used as an example of the gas compressor. However, the present invention can also be applied to scroll type, reciprocating type, and turbo type compressors.

[First embodiment]
The configuration of the package type gas compressor according to the first embodiment will be explained using FIGS. 1 to 4. FIG. 1 is a perspective view of a packaged gas compressor according to a first embodiment of the present invention, viewed from the back side. FIG. 2 is a rear view of the packaged gas compressor according to the first embodiment shown in FIG. 1. FIG. 3 is a top view of the packaged gas compressor according to the first embodiment shown in FIG. 1. FIG. 4 is a view of a cooling fan and an intake/exhaust duct that constitute a part of the packaged gas compressor according to the first embodiment shown in FIG. 1, viewed from the right side panel side. In FIG. 1, the package and duct are seen through. In FIG. 2, the back panel and the duct are seen through. In FIG. 3, the top panel is seen through. In FIG. 4, the exhaust duct is seen through. In addition, in this description, the left and right direction indicates the direction when the packaged gas compressor is viewed from the front side.

In FIG. 1, a packaged gas compressor has various components including a compressor main body 2 housed inside a housing 1 serving as a package. The components of the packaged gas compressor include a compressor body 2 that compresses gas, a prime mover 3 that drives the compressor body 2, an air cooler 4 that cools the compressed gas (fluid) discharged from the compressor body 2, and a compressor body 2 that compresses the gas. An oil cooler 5 that cools lubricating oil (fluid) supplied to the machine body 2, an oil tank 6 that temporarily stores lubricating oil (fluid) supplied to the compressor body 2, and generating cooling air inside the casing 1. There are a cooling fan 7 for controlling the engine, a starting panel 8 having a control circuit for controlling the driving of the prime mover 3 and the cooling fan 7, and the like. The compressor main body 2 is, for example, a screw type compressor equipped with a screw rotor having twisted teeth. The prime mover 3 is, for example, an electric motor that rotates around a rotation axis Am (see FIGS. 2 and 3). The air cooler 4 is an air-cooled heat exchanger that cools compressed gas introduced from the compressor main body 2 by passing cooling air therethrough, and has an inlet surface 4a into which the cooling air flows. The oil cooler 5 is an air-cooled heat exchanger that cools the lubricating oil introduced from the compressor body 2 by passing cooling air therethrough, and has an inlet surface 5a into which the cooling air flows. The cooling fan 7 is, for example, a centrifugal fan that rotates around a rotation axis Af (see FIGS. 2 and 3), and has a fan motor housed inside.

The housing 1 includes, for example, a base 11, a cylindrical side panel that rises from the periphery of the base 11 and surrounds the

component devices

2, 3, 4, 5, 6, 7, and 8, and closes an upper end opening of the side panel. It has a top panel 12. The base 11 is, for example, formed in a rectangular shape when viewed from the top side. The side panels include, for example, a front panel 13 , a back panel 14 facing the front panel 13 , a left side panel 15 connecting the left side end of the front panel 13 and the left side end of the back panel 14 , and the front panel 13 . It is comprised of a right side panel 16 that connects the right side end and the right side end of the back panel 14. On the front panel 13, operation switches, a monitor, etc. (not shown) are arranged.

The compressor main body 2 and the electric motor 3 are integrated so that their axial directions are parallel to each other to form a main body unit. As shown in FIGS. 1 and 2, the

main body units

2 and 3 are arranged on the lower side of the housing 1, for example, on the base 11. The

main unit units

2 and 3 are placed horizontally so that the axial direction of the compressor main body 2 and the rotational axis Am of the electric motor 3 are substantially parallel to the installation surface of the base 11. As shown in FIGS. 1 and 3, the

main body units

2 and 3 are arranged to extend in the left-right direction (width direction of the housing 1) between the left side panel 15 and the right side panel 16. In addition, it is arranged at a position closer to the back panel 14 than the front panel 13 in the housing 1 (on the back panel 14 side). The

main unit units

2 and 3 are arranged such that the compressor main body 2 is located on the left side panel 15 side and the electric motor 3 is located on the right side panel 16 side.

An oil tank 6 and a starting panel 8 are arranged on the front panel 13 side within the housing 1, as shown in FIGS. 1 and 3, for example. The oil tank 6 is arranged, for example, on the left side panel 15 side so as to be adjacent to the compressor main body 2. The oil tank 6 is a container that extends in the vertical direction, and is installed on the base 11, as shown in FIGS. 1 and 2, for example. As shown in FIGS. 1 to 3, for example, the starting board 8 is installed on the base 11 and is placed on the right side panel 16 side along the front panel 13 so as to be adjacent to the electric motor 3.

A cooling fan 7, an air cooler 4, and an oil cooler 5 are arranged on the upper side of the housing 1, as shown in FIGS. 1 and 2. That is, the cooling fan 7, air cooler 4, and oil cooler 5 are located above the

main units

2 and 3. As shown in FIGS. 1 to 3, the cooling fan 7 is arranged such that the rotation axis Af is orthogonal to the height direction of the housing 1, and the rotation axis Am of the electric motor 3 (the axis of the compressor main body 2) direction). That is, the cooling fan 7 is arranged so that the rotation axis Af extends in the left-right direction (the width direction of the housing 1). For example, the cooling fan 7 is arranged so that its position in the left-right direction (width direction of the housing 1) overlaps a part of the electric motor 3, and the suction side faces the compressor main body 2 (left side panel 15). It is arranged like this.

An air cooler 4 and an oil cooler 5 are arranged on the suction side of the cooling fan 7 (upstream side of the flow of cooling air). The air cooler 4 and oil cooler 5 are connected to a cooling fan 7 via a fan intake duct 21. The fan suction duct 21 rectifies the flow of cooling air from the air cooler 4 and oil cooler 5 to the cooling fan 7. The air cooler 4 and the oil cooler 5 are arranged such that the cooling air inflow surface 4a and the inflow surface 5a are perpendicular to the rotation axis Af of the cooling fan 7, respectively. The air cooler 4 and the oil cooler 5 are arranged, for example, in parallel to the rotational axis Af of the cooling fan 7, and their

inflow surfaces

4a and 5a constitute one inflow surface of cooling air. As shown in FIGS. 2 and 3, for example, the air cooler 4 and the oil cooler 5 are arranged so that their positions in the left-right direction (width direction of the housing 1) overlap a part of the compressor main body 2. Specifically, as shown in FIG. 2 and FIG. The compressor main body 2 is arranged so as to overlap the area between the air cooler 4 and the side panel of the oil cooler 5 (which faces the cooling air inlet side) in the extending direction of the rotation axis Af of the compressor 7. Moreover, the rotation axis Af of the cooling fan 7 is located on the oil cooler 5 side of the air cooler 4 and the oil cooler 5.

For example, as shown in FIG. 1, the cooling fan 7 is housed inside an exhaust duct 22 arranged inside the housing. The exhaust duct 22 has an outlet connected to the exhaust port 19 of the top panel 12 of the housing 1, and guides cooling air discharged from the cooling fan 7 to the exhaust port 19, which will be described later. The exhaust duct 22 is, for example, a square duct with a rectangular flow path cross section, and is configured such that the center line Cd extends in the height direction (vertical direction) of the housing 1. For example, as shown in FIG. 4, the cooling fan 7 is configured to rotate counterclockwise when viewed from the right side panel 16 side. As shown in FIGS. 3 and 4, the cooling fan 7 is arranged in the exhaust duct 22 so that the rotation axis Af does not intersect with the center line Cd of the exhaust duct 22 and is offset toward the front panel 13 side. ing. In other words, when the rotation axis Af of the cooling fan 7 is viewed from one side in the extending direction of the rotation axis Af with respect to the center line Cd of the exhaust duct 22, the rotation direction of the cooling fan 7 is in the height direction of the casing. is arranged in the exhaust duct so as to be offset toward the downwardly facing region of the exhaust duct.

As shown in FIGS. 1 to 3, on the lower side of the right side panel 16 of the side panels of the housing 1 and on the rear panel 14 side, there is an air intake port for taking in outside air (cooling air) into the housing 1. 17 are provided. That is, the intake port 17 is provided so as to overlap the

main units

2 and 3 in the height direction (vertical direction) of the housing 1, and is located in the extending direction of the rotation axis Af of the cooling fan 7. It is provided. Further, the intake port 17 is provided on the side of the

main body units

2 and 3 that is closer to the electric motor 3. That is, the intake port 17 is provided at a position closer to the cooling fan 7 than the air cooler 4 and the oil cooler 5 among the air cooler 4, the oil cooler 5, and the cooling fan 7. Only one intake port 17 is formed in the casing 1 of this embodiment. The top panel 12 of the housing 1 is provided with an exhaust port 19 for discharging cooling air to the outside of the housing 1.

Next, the operation and effects of the packaged gas compressor according to the first embodiment will be explained using FIGS. 1 to 4. Note that in FIG. 2, broken line arrows indicate the flow of cooling air. In FIG. 3, dashed white arrows indicate the flow of cooling air.

In the package type gas compressor configured as described above, the compressor main body 2 shown in FIG. will be introduced in At this time, the compressor body 2 itself is heated by the compression of the gas, and the electric motor 3 itself also generates heat. Further, the oil in the oil tank 6 is supplied to the compressor main body 2 via the oil cooler 5, and the oil that has become high in temperature in the compressor main body 2 returns to the oil tank 6.

At this time, the cooling fan 7 is driven to generate cooling air within the housing 1. This cooling air cools the compressor main body 2 and the electric motor 3, as well as the compressed gas flowing through the air cooler 4 and the oil flowing through the oil cooler 5.

Specifically, as shown in FIGS. 2 and 3, cooling air (outside air) flows in from the intake port 17 provided at the bottom of the right side panel 16 of the housing 1 and flows toward the left side panel 15. flows. The cooling air flowing in from the intake port 17 first flows through the area of the electric motor 3 and the starting plate 8, which are located at the same height as the intake port 17, and then flows through the area of the compressor body 2 and the oil tank 6. That is, the cooling air flows along the axial direction of the compressor main body 2 and the electric motor 3 (the direction in which the main body unit extends) in the lower part of the housing 1 . As a result, the electric motor 3, starting board 8, compressor main body 2, and oil tank are cooled. This cooling air is turned around in the vicinity of the left side panel 15 in a U-shape from the lower side to the upper side of the housing 1, passes through the air cooler 4 and the oil cooler 5, and is then sucked into the cooling fan 7. . The cooling air sucked into the cooling fan 7 is discharged from the exhaust port 19 of the top panel 12 of the housing 1 via the exhaust duct 22.

In this embodiment, the cooling fan 7 is installed so that the rotational axis Af of the cooling fan 7 is parallel to the installation surface of the base 11 of the housing 1, and the cooling fan 7 is provided with heat on the suction side. An air cooler 4 and an oil cooler 5, which are exchangers, are arranged. With this configuration, the flow of cooling air is turned from the lower side of the housing 1 to the upper side in a U-shape, and passes through a wide range of the inflow surface 4a of the air cooler 4 and the inflow surface 5a of the oil cooler 5. As a result, the flow of the cooling air on the upstream side of the cooling fan 7 is rectified so that the bias in the velocity distribution (pressure loss) of the cooling air is alleviated. Therefore, the diameter of the flow of cooling air diverted from the lower side to the upper side of the housing 1 is larger than in the case of a configuration in which the cooling fan is arranged so that the axis of rotation of the cooling fan extends in the vertical direction of the housing 1. becomes smaller, and the cooling air on the upstream side of the cooling fan 7 flows over a wider area than in the case of the configuration in which the air cooler 4 and the oil cooler 5 are arranged on the discharge side of the cooling fan 7. Therefore, the cooling air that is diverted from the lower side to the upper side of the housing 1 and directed toward the air cooler 4 and the oil cooler 5 is directed to the position of the end of the compressor body 2 on the left side panel 15 side and the arrangement position of the oil tank 6. The compressor body 2 and oil tank 6 are efficiently cooled.

In addition, in the case of this configuration, the speed of the cooling air in the region folded back in a U-shape from the lower side to the upper side of the housing 1 is faster than when it flows through the lower side of the housing 1. Therefore, in this embodiment, when viewed from the top side of the housing 1, the oil cooler 5 and the left side panel 15 (the side surface located on the suction side in the extending direction of the rotational axis Af of the cooling fan 7) Most of the compressor main body 2 and the oil tank 6 are arranged between the main body 2 and the main body 2 (panel). In this case, at the positions of the compressor main body 2 and the oil tank 6, the cooling air is turned back from the lower side of the housing 1 to the upper side in a U-shape. Therefore, the compressor main body 2 and the oil tank 6 are efficiently cooled by the relatively fast cooling air.

Furthermore, as described above, the cooling fan 7 is installed so that the rotational axis Af is parallel to the installation surface of the base 11 of the housing 1. In this configuration, the opening area of the exhaust port 19 can be made smaller than in the case of a configuration in which the cooling fan is arranged so that the axis of rotation extends in the vertical direction of the housing 1. Therefore, by reducing the opening area of the exhaust port 19, it is possible to reduce noise passing through the exhaust port 19.

Furthermore, in this embodiment, the air cooler 4 and oil cooler 5 arranged on the suction side of the cooling fan 7 are arranged in parallel. In the case of this configuration, the region of the cooling air rectified by the air cooler 4 and oil cooler 5 on the upstream side of the cooling fan 7 becomes wide. This increases the degree of freedom in arranging the cooling fan 7.

Further, in this embodiment, when viewed from one side in the extending direction of the rotation axis Af of the cooling fan 7, the rotation axis Af is cooled with respect to the center line Cd of the exhaust duct 22 extending in the vertical direction. The cooling fan 7 is arranged within the exhaust duct 22 so that the rotation direction of the fan 7 is offset toward the downward side. In this configuration, the flow path of the cooling air discharged from the cooling fan 7 and flowing upward toward the exhaust port 19 is larger than the flow path of the cooling air flowing downward, so the pressure of the cooling air is Loss is reduced and the volume of cooling air can be increased.

Furthermore, in this embodiment, the cooling fan 7 is arranged such that the rotation axis Af of the cooling fan 7 is located on the oil cooler 5 side of the air cooler 4 and oil cooler 5 arranged in parallel. With this configuration, it is possible to increase the amount of cooling air for the oil cooler 5, which has a larger amount of heat exchange than the air cooler 4, than for the air cooler 4.

By the way, in a package type gas compressor, the side surface of the package where the intake port is formed needs to be spaced a certain distance from the wall surface existing at the installation location so that the intake air is not obstructed. That is, the installation position of a packaged gas compressor is limited depending on the intake port of the package. In this embodiment, only one intake port 17 is provided for the housing 1. Therefore, the

side panels

13, 14, and 15 of the housing 1 other than the right side panel 16 provided with the intake port 17 must be spaced a predetermined distance from the wall surface where the packaged gas compressor is installed. do not have. Therefore, there are few restrictions on the installation location of the packaged gas compressor, and there is a large degree of freedom in the installation location of the packaged gas compressor, and it is possible to save space at the installation location.

Note that in this embodiment, it is possible to configure the electric motor 3 and the cooling fan 7 to rotate in opposite directions. In this case, the vibrations of the electric motor 3 and the cooling fan 7 cancel each other out, thereby reducing the overall vibration of the packaged gas compressor.

As described above, the packaged gas compressor according to the first embodiment includes a compressor main body 2 that compresses gas, a cooling fan 7 that generates cooling air by rotating around the rotation axis Af, and a cooling fan 7 that generates cooling air by rotating around the rotation axis Af. An air-cooled air cooler 4 and an oil cooler 5 (heat exchanger) that cool the compressed gas and lubricating oil (fluid) introduced from the compressor body 2 by the passage of wind, and the compressor body 2 and the cooling fan 7. It includes a housing 1 that houses an air cooler 4 and an oil cooler 5 (heat exchanger). The housing 1 has cooling air intake ports 17 on side surfaces 13, 14, 15, and 16 surrounding the compressor main body 2, the cooling fan 7, the air cooler 4, and the oil cooler 5 (heat exchanger). The compressor main body 2 is arranged in the lower part of the housing 1 . The cooling fan 7 is disposed above the compressor main body 2, and is disposed so that the rotation axis Af is orthogonal to the height direction of the housing 1. The air cooler 4 and the oil cooler 5 (heat exchanger) are arranged on the suction side of the cooling fan 7. The intake port 17 is provided so as to overlap the compressor main body 2 in the height direction of the casing 1, and is connected to the air cooler 4, the oil cooler 5 (heat exchanger), and the cooling fan 7. It is provided at a position closer to the cooling fan 7 than the heat exchanger. The compressor main body 2 includes an air cooler 4, an oil cooler 5 (heat exchanger), and the air cooler 4 and oil of the side surfaces 13, 14, 15, and 16 of the housing 1 in the extending direction of the rotation axis Af of the cooling fan 7. It is arranged so as to overlap the area between the left side panel 15, which is the opposing surface facing the cooling air inflow side of the cooler 5 (heat exchanger).

According to this configuration, the cooling fan 7 disposed above the compressor main body 2 is disposed so that the axis of rotation Af is orthogonal to the height direction of the housing 1, and the air cooler 4 and the oil cooler 5 (heat exchanger) By arranging the cooling fan 7 at a position on the suction side, and by providing the intake port 17 at the height of the compressor main body 2 at a position closer to the cooling fan 7 than the air cooler 4 and oil cooler 5 (heat exchanger), The flow of cooling air is folded back in a U-shape from the lower part to the upper part of the housing 1 and is diverted to flow into a wide area of the air cooler 4 and oil cooler 5 (heat exchanger). Furthermore, by arranging the compressor body 2 so as to overlap the area between the air cooler 4 and oil cooler 5 (heat exchanger) and the left side panel 15 (side surface) of the housing 1, the compressor body 2 can be folded back into a U-shape. Since the compressor body 2 is located in the region of the cooling air, the cooling fan is arranged so that the axis of rotation extends in the height direction of the housing 1, and the heat exchanger is arranged downstream of the cooling fan. The cooling performance for the compressor main body 2 can be improved compared to the case. Therefore, the soundness of the cooling performance can be maintained while reducing noise by reducing the opening area of the intake port 17 or the like.

Furthermore, in the packaged gas compressor according to the present embodiment, only one intake port 17 is formed in the housing 1. According to this configuration, restrictions on the installation of the packaged gas compressor are reduced, so the degree of freedom in installing the packaged gas compressor can be increased, and the installation space for the packaged gas compressor can be reduced. be.

Further, in this embodiment, the air intake port is provided in the right side panel 16, which is a portion of the side surfaces 13, 14, 15, and 16 of the housing 1 located in the extending direction of the rotation axis Af of the cooling fan 7. It is being According to this configuration, since the flow of cooling air from the intake port 17 toward the cooling fan 7 flows along the extending direction of the rotational axis Af of the cooling fan 7, the rotational axis Af of the cooling fan 7 in the housing 1 is Cooling can be performed widely from one end to the other end in the extending direction.

Furthermore, the compressor main body 2 according to the present embodiment is of a screw type, and is arranged so that its axial direction is parallel to the rotational axis Af of the cooling fan 7. According to this configuration, since the axial direction of the compressor body 2 is arranged along the flow of cooling air, the entire length of the compressor body 2 is cooled, and efficient cooling is possible.

Furthermore, in the package type gas compressor according to the present embodiment, the cooling fan 7 is a centrifugal fan, and a cooling air exhaust port 19 is formed in the top panel 12 (upper surface) of the housing 1. According to this configuration, since the opening area of the exhaust port 19 can be made smaller than when the exhaust port is provided in the axial direction of the cooling fan 7, noise can be reduced.

Furthermore, the packaged gas compressor according to the present embodiment includes an exhaust duct 22 inside the housing 1 that guides cooling air to the exhaust port 19 of the housing 1. The exhaust duct 22 is configured such that the center line Cd extends in the height direction of the housing 1. The cooling fan 7 is housed in the exhaust duct 22, and the rotation axis Af is offset from the center line Cd of the exhaust duct 22 toward a region where the rotation direction of the cooling fan 7 faces downward in the height direction of the housing 1. It is arranged so that

According to this configuration, by offsetting the rotation axis Af of the cooling fan 7 with respect to the center line Cd of the exhaust duct 22, it is possible to reduce pressure loss due to the uneven flow of the centrifugal fan 7 in the exhaust duct 22. .

Furthermore, the packaged gas compressor according to the present embodiment includes an oil tank 6 (tank) within the housing 1 that stores lubricating oil (fluid) to be supplied to the compressor main body 2. The oil tank 6 (tank) is an area between the air cooler 4 and the oil cooler 5 (heat exchanger) and the left side panel 15 as an opposing surface of the housing 1 in the extending direction of the rotation axis Af of the cooling fan 7. are arranged so that they overlap.

According to this configuration, since the oil tank 6 (tank) is located in the region of the cooling air that is folded back in a U-shape, the cooling fan is arranged so that the axis of rotation extends in the height direction of the housing 1. Cooling performance for the compressor main body 2 can be improved compared to a configuration in which the heat exchanger is disposed downstream of the cooling fan.

[Modification of the first embodiment]
Next, a packaged gas compressor according to a modification of the first embodiment will be illustrated using FIG. 5. FIG. 5 is a top view showing a packaged gas compressor according to a modification of the first embodiment. In FIG. 5, the top panel is seen through. Note that in FIG. 5, the same reference numerals as those shown in FIGS. 1 to 4 refer to similar parts, so a detailed explanation thereof will be omitted.

The difference between the package type gas compressor according to the modification of the first embodiment shown in FIG. 5 and the package type gas compressor according to the first embodiment (see FIG. 3) is that the intake air formed in the housing 1A The position of the port 18 is different, and the electric motor 3A has a self-cooling fan 31 in response to the change in the position of the intake port 18. Specifically, the housing 1 of the first embodiment shown in FIG. 3 has an air intake port 17 on the lower side of the right side panel 16. In contrast, the housing 1A according to the present modification has no air intake port on the right side panel 16 and has an air intake port 18 on the lower side of the back panel 14. The intake port 18 is provided on the back panel 14, which is a side panel, in a direction perpendicular to the direction in which the rotation axis Af of the cooling fan 7 extends. Therefore, it is necessary to turn the flow of cooling air generated by the cooling fan 7 toward the direction in which the rotational axis Af of the cooling fan 7 extends in the region where it flows in from the air intake port 18 . Therefore, the electric motor 3A is configured to have a self-cooling fan 31. The natural cooling fan 31 diverts the cooling air along the extending direction of the main unit units 2 and 3 (the extending direction of the rotational axis Af of the cooling fan 7) by sucking the cooling air that flows in from the intake port 18. It has a function. Note that the intake port 18 is formed such that its opening center 18a is located closer to the right side panel 16 than the self-cooling fan 31 of the electric motor 3A.

This modification is effective when an intake port cannot be provided on the right side panel 16 due to restrictions on the installation position of the packaged gas compressor. In this configuration, the amount of cooling air flowing around the electric motor 3A and the starting board 8 changes because the flow near the area flowing in from the intake port 18 of the back panel 14 is different from that in the first embodiment. However, the downstream flows from the compressor body 2 and oil tank 6 side regions are almost the same.

According to the modification of the first embodiment described above, the flow of cooling air is folded back in a U-shape from the lower part to the upper side in the housing 1A, and the air cooler 4 and oil It is diverted to flow in a wide area of the cooler 5 (heat exchanger). Furthermore, by arranging the compressor body 2 so as to overlap the area between the air cooler 4 and oil cooler 5 (heat exchanger) and the left side panel 15 (side surface) of the housing 1A, the compressor body 2 is folded back into a U-shape. Since the compressor main body 2 is located in the region of the cooling air, the cooling fan is arranged so that the axis of rotation extends in the height direction of the housing 1A, and the heat exchanger is arranged downstream of the cooling fan. The cooling performance for the compressor main body 2 can be improved more than in the case. Therefore, the soundness of the cooling performance can be maintained while reducing noise by reducing the opening area of the intake port 18 or the like.

Furthermore, in the packaged gas compressor according to the present modification, the intake port 18 is located at a portion of the side surfaces 13, 14, 15, and 16 of the housing 1A in a direction perpendicular to the rotation axis Af of the cooling fan 7. It is provided on a certain back panel 14. According to this configuration, it is not possible to provide an intake port on the right side panel 16 in the direction extending in the rotation axis Af of the cooling fan 7 as in the first embodiment due to the restrictive conditions of the installation of the packaged compressor. This is a configuration that can be adopted in some cases.

[Second embodiment]
Next, a packaged gas compressor according to a second embodiment of the present invention will be illustrated using FIG. 6. FIG. 6 is a top view showing a packaged gas compressor according to the second embodiment. In FIG. 6, the top panel is seen through. Note that in FIG. 6, the same reference numerals as those shown in FIGS. 1 to 5 refer to similar parts, so detailed explanation thereof will be omitted.

The packaged gas compressor according to the second embodiment shown in FIG. 6 differs from the first embodiment (see FIG. 3) in that the number of intake ports in the housing 1B is increased from one to two, The reason is that a sound insulating plate 24 is arranged in response to the increase in the number of mouths. Specifically, in addition to the air intake port 17 formed on the right side panel 16, the housing 1B has an air intake port 18 formed on the lower side of the back panel 14 of the housing 1B. That is, the housing 1B has two

intake ports

17 and 18 formed at different positions. The added air intake port 18 is formed on the right side panel 16 side of the back panel 14 and is arranged at a position corresponding to the end of the

main body units

2 and 3 on the electric motor 3 side. The air intake port 18 of the back panel 14 is formed to have a smaller opening area than the air intake port 17 of the right side panel 16, for example. A sound insulating plate 24 is arranged between the air intake port 17 of the right side panel 16 and the electric motor 3 of the

main unit units

2 and 3. The sound insulating plate 24 is arranged so as to face the air intake port 17 of the right side panel 16, and serves to reduce noise emitted from the air intake port 17.

In this embodiment, even if the cooling air flowing in from the intake port 17 of the right side panel 16 is obstructed by the sound insulating plate 24 or the like and the air volume decreases, the cooling air flowing in from the intake port 18 of the back panel 14 is By supplementing with the above, it is possible to secure the necessary amount of cooling air flowing around the electric motor 3.

Note that in this embodiment, a configuration in which a sound insulating plate is disposed near the air intake port 18 of the back panel 14 is also possible.

According to the packaged gas compressor according to the second embodiment described above, the flow of cooling air is folded back in a U-shape from the lower part to the upper side in the housing 1B, as in the first embodiment. It is diverted to flow in large areas of the air cooler 4 and oil cooler 5 (heat exchanger). Furthermore, by arranging the compressor body 2 so as to overlap the area between the air cooler 4 and oil cooler 5 (heat exchanger) and the left side panel 15 (side surface) of the housing 1B, the compressor body 2 can be folded back into a U-shape. Since the compressor main body 2 is located in the region of the cooling air, the cooling fan is arranged so that the axis of rotation extends in the height direction of the housing 1B, and the heat exchanger is arranged downstream of the cooling fan. The cooling performance for the compressor main body 2 can be improved compared to the case. Therefore, the soundness of the cooling performance can be maintained while reducing noise by reducing the opening area of the

intake ports

17 and 18.

Furthermore, in the package type gas compressor according to this embodiment, a plurality of

intake ports

17 and 18 are formed in the housing 1B. Further, a sound insulating plate 24 is arranged within the housing 1 so as to face at least one of the

intake ports

17 and 18.

According to this configuration, it is possible to increase the total opening area of the

intake ports

17 and 18 to improve cooling performance, and to reduce noise by using the sound insulating plate 24.

[Other embodiments]
Note that the present invention is not limited to the embodiments described above, and includes various modifications. The embodiments described above have been described in detail to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. That is, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is also possible to add, delete, or replace some of the configurations of each embodiment with other configurations.

For example, in the embodiment and its modifications described above, an example of a configuration in which the cooling fan 7 is a centrifugal fan has been described. However, it is also possible to configure the cooling fan as an axial fan or a mixed flow fan.

Furthermore, in the above-described embodiments and modifications thereof, the case 1 is formed in the shape of a rectangular parallelepiped, and the side panels include a front panel 13, a back panel 14, a left side panel 15, and a right side panel 16. showed that. However, the shape of the package is arbitrary, and a configuration in which the side panel of the package is polygonal or cylindrical is also possible.

Further, in the above-described embodiment and its modification examples, an example of a configuration in which the air cooler 4 and the oil cooler 5 are arranged in parallel with respect to the rotation axis Af of the cooling fan 7 is shown. However, in cases where the air cooler 4 and oil cooler 5 cannot be accommodated in the housing 1 if arranged in parallel, a configuration in which the air cooler 4 and oil cooler 5 are arranged in tandem (in series) with respect to the rotation axis Af of the cooling fan 7 is also possible. It is possible.

Further, regarding the above-described embodiment and its modification, the arrangement of the

component devices

2, 3, 4, 5, 6, 7, and 8 in the casing 1 and the formation of the intake port 17 and the exhaust port 19 of the casing 1 are also explained. A configuration in which the position is reversed in the front-back direction (the depth direction of the housing 1) or the left-right direction (the width direction of the housing 1) is also possible.

Furthermore, in the first embodiment and its modifications described above, a configuration in which a sound insulating plate and a dryer are arranged inside the

housings

1 and 1A is also possible. The dryer removes moisture from the compressed gas discharged from the compressor main body 2. Further, in the first embodiment described above, a configuration in which the electric motor 3 has a self-cooling fan is also possible, as in the modification thereof.

1, 1A, 1B... Housing, 2... Compressor main body, 3, 3A... Electric motor, 4... Air cooler (heat exchanger), 5... Oil cooler (heat exchanger), 6... Oil tank (tank), 7 ...Cooling fan, 13...Front panel (side), 14...Back panel (side), 15...Left side panel (side, opposing surface), 16...Right side panel (side), 17...Intake port, 18...Intake port , 19...Exhaust port, 22...Exhaust duct, Af...Rotation axis line, Cd...Center line.

Claims

A compressor body that compresses gas;
A cooling fan that generates cooling air by rotating around a rotational axis;
an air-cooled heat exchanger that cools fluid introduced from the compressor main body by passing the cooling air;
comprising a casing that accommodates the compressor main body, the cooling fan, and the heat exchanger,
The housing has the cooling air intake port on a side surface surrounding the compressor main body, the cooling fan, and the heat exchanger,
The compressor main body is disposed at a lower portion within the housing,
The cooling fan is disposed above the compressor main body, and the rotation axis is orthogonal to the height direction of the casing,
The heat exchanger is arranged at a position on the suction side of the cooling fan,
The intake port is provided to overlap with the compressor main body in the height direction of the casing, and is provided at a position closer to the cooling fan than the heat exchanger among the heat exchanger and the cooling fan. is,
The compressor main body includes an opposing surface of the heat exchanger and the side surface of the casing that faces the cooling air inflow side of the heat exchanger in the extending direction of the rotation axis of the cooling fan. A packaged gas compressor characterized by being arranged so as to overlap the area between the two.
The packaged gas compressor according to claim 1,
In the packaged gas compressor, only one intake port is formed in the housing.
The packaged gas compressor according to claim 2,
The air intake port is provided in a portion of the side surface of the housing that is located in a direction in which the rotation axis of the cooling fan extends.
The packaged gas compressor according to claim 2,
The air intake port is provided in a portion of the side surface of the housing in a direction perpendicular to the rotational axis of the cooling fan.
The packaged gas compressor according to claim 3,
The compressor main body is of a screw type, and the axial direction thereof is arranged parallel to the rotational axis of the cooling fan. The packaged gas compressor.
The packaged gas compressor according to claim 1,
A plurality of the intake ports are formed in the housing,
A packaged gas compressor, wherein a sound insulating plate is disposed within the housing so as to face at least one of the intake ports.
The packaged gas compressor according to claim 1,
The cooling fan is a centrifugal fan,
A packaged gas compressor, wherein the cooling air exhaust port is formed on the upper surface of the casing.
The packaged gas compressor according to claim 7,
an exhaust duct that guides the cooling air to the exhaust port of the housing,
The exhaust duct is configured such that a center line extends in the height direction of the housing,
the cooling fan is housed within the exhaust duct;
The cooling fan is arranged such that the rotational axis of the cooling fan is offset from the centerline of the exhaust duct toward a region in which the rotational direction of the cooling fan faces downward in the height direction of the casing. type gas compressor.
The packaged gas compressor according to claim 1,
A tank for storing fluid to be supplied to the compressor main body is provided in the housing,
The tank is arranged so as to overlap a region between the heat exchanger and the opposing surface of the side surfaces of the casing in the extending direction of the rotation axis of the cooling fan. Packaged gas compressor.