Box type gas compressor

Abstract

A box-type gas compressor includes a compressor main body, a cooling fan, an air-cooled heat exchanger, and a casing housing the compressor main body, the cooling fan, and the air-cooled heat exchanger. The housing has a cooling air suction port on a side surface surrounding the constituting device. The compressor main body is arranged at the lower part in the housing. The cooling fan is disposed above the compressor body and is disposed such that the rotational axis is orthogonal to the height direction of the housing. The heat exchanger is disposed at a position on the suction side of the cooling fan. The suction port is provided so as to overlap the compressor body in the height direction of the housing, and is provided at a position closer to the cooling fan than the heat exchanger, among the heat exchanger and the cooling fan. The compressor main body is disposed so as to overlap, in the extension direction of the rotational axis of the cooling fan, a region between the heat exchanger and an opposing surface of the side surface of the housing, the opposing surface facing the inflow side of the cooling air of the heat exchanger.

Description

Technical Field

[0001] The present invention relates to a box-type gas compressor, and more particularly to a box-type gas compressor that air-cools components inside a package (box). Background Art

[0002] The box-type gas compressor contains components such as a compressor body capable of compressing gas, a power machine driving the compressor body, and a heat exchanger for cooling compressed gas discharged from the compressor body or oil supplied to the compressor body inside a package. In order to prevent the components from reaching high temperatures, most box-type gas compressors dissipate heat by circulating cooling air generated by a cooling fan inside the package.

[0003] As a box-type gas compressor that allows cooling air to circulate inside a package, there is, for example, a structure described in Patent Document 1. In the box-type compressor described in Patent Document 1, a first cooling air inlet and a second cooling air inlet are respectively formed on one side and the other side of a shell (package) that accommodates a main unit that integrates the compressor body and the motor at the lower part, and a cooling air outlet is formed on the upper surface of the shell. In addition, a cooling fan is accommodated inside a fan duct provided at the upper part of the shell, and the cooling fan is arranged in a manner such that its rotating axis extends in the vertical direction. An air-cooled heat exchanger is arranged on the upper side of the exhaust port of the fan duct and on the lower side of the cooling air outlet. In this box-type compressor, it is configured so that the flow of cooling air taken in from the first and second cooling air inlets and discharged from the cooling air outlet is induced by the cooling fan.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2017 / 195242 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In the box-type compressor described in Patent Document 1, a plurality of cooling air inlets (intake ports) are formed on the shell (package) to increase the total opening area of ​​the package, thereby achieving an improvement in the cooling performance of the cooling main unit. However, the noise emitted from the intake ports tends to increase in accordance with the increase in the total opening area of ​​the intake ports. In the box-type compressor described in Patent Document 1, in order to reduce noise without changing the configuration of the internal components of the package, the total opening area of ​​the intake ports is reduced, and the cooling performance may be reduced due to the reduction in the flow rate of cooling air taken into the interior of the package. Therefore, it is required to take both noise reduction and cooling performance into consideration.

[0009] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a box-type gas compressor capable of achieving noise reduction while maintaining sound cooling performance.

[0010] Methods for solving problems

[0011] This application includes multiple technical solutions to the above-mentioned problems. If one example is cited, it includes: a compressor body capable of compressing gas; a cooling fan that generates cooling air by rotating around a rotation axis; an air-cooled heat exchanger that cools a fluid introduced from the above-mentioned compressor body by passing the above-mentioned cooling air; and a shell that accommodates the above-mentioned compressor body, the above-mentioned cooling fan and the above-mentioned heat exchanger, the above-mentioned shell having an air intake port for the above-mentioned cooling air on a side that surrounds the above-mentioned compressor body, the above-mentioned cooling fan and the above-mentioned heat exchanger, the above-mentioned compressor body is arranged in a lower part in the above-mentioned shell, the above-mentioned cooling fan is arranged above the above-mentioned compressor body, and is arranged in a manner that the above-mentioned rotation axis and the height direction of the above-mentioned shell are orthogonal, the above-mentioned heat exchanger is arranged at a position on the suction side of the above-mentioned cooling fan, the above-mentioned air intake port is arranged in a manner overlapping with the above-mentioned compressor body in the height direction of the above-mentioned shell, and is arranged at a position of the above-mentioned heat exchanger and the above-mentioned cooling fan that is closer to the above-mentioned cooling fan than the above-mentioned heat exchanger, and the above-mentioned compressor body is arranged in a manner that overlaps with the above-mentioned compressor body in the height direction of the above-mentioned shell, and is closer to the above-mentioned cooling fan than the above-mentioned heat exchanger, and the above-mentioned compressor body is arranged in a manner that overlaps with the area between the opposite surfaces of the above-mentioned heat exchanger and the above-mentioned side surface of the above-mentioned shell that are opposite to the inflow side of the above-mentioned cooling air of the above-mentioned heat exchanger in the extension direction of the above-mentioned rotation axis of the above-mentioned cooling fan.

[0012] Effects of the Invention

[0013] According to one example of the present invention, a cooling fan disposed above the compressor body is disposed in such a manner that the axis of rotation is orthogonal to the height direction of the shell, a heat exchanger is disposed at a position on the suction side of the cooling fan, and an air intake port is disposed at a position closer to the cooling fan than the heat exchanger at the height of the compressor body, thereby turning the flow of cooling air in such a manner that it folds back in a U-shape from the lower part of the shell to the upper part and flows into a larger area of ​​the heat exchanger. Furthermore, by arranging the compressor body in such a manner as to overlap the area between the heat exchanger and the side surface of the shell, the compressor body is located in the area of ​​the cooling air folded back in a U-shape, thereby improving the cooling performance of the compressor body compared to a structure in which the cooling fan is disposed in such a manner that the axis of rotation extends in the height direction of the shell and the heat exchanger is disposed on the downstream side of the cooling fan. Therefore, it is possible to achieve a reduction in noise by reducing the opening area of ​​the air intake port, and to maintain the soundness of the cooling performance.

[0014] Other problems, structures, and effects than those described above will become apparent from the following description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a perspective view of the box-type gas compressor according to the first embodiment of the present invention as viewed from the back side.

[0016] Figure 2 yes Figure 1 A rear view of the box-type gas compressor according to the first embodiment is shown.

[0017] Figure 3 yes Figure 1 A top view of a box-type gas compressor according to a first embodiment is shown.

[0018] Figure 4 The structure is viewed from the right side panel Figure 1 FIG. 1 is a diagram showing a cooling fan and a portion of an intake and exhaust duct of a box-type gas compressor according to a first embodiment.

[0019] Figure 5 It is a top view showing a box-type gas compressor according to a modified example of the first embodiment of the present invention.

[0020] Figure 6 It is a top view showing a box-type gas compressor according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0021] Hereinafter, an embodiment of a box-type gas compressor according to the present invention will be described using the accompanying drawings. In this embodiment, a screw compressor is used as an example of a gas compressor. However, the present invention can also be applied to scroll, reciprocating, and turbine compressors.

[0022] [First embodiment]

[0023] use Figure 1 to Figure 4 The structure of the box-type gas compressor according to the first embodiment will be described. Figure 1 This is a perspective view of the box-type gas compressor according to the first embodiment of the present invention as viewed from the back side.

[0024] Figure 2 yes Figure 1 A rear view of the box-type gas compressor according to the first embodiment is shown. Figure 3 yes Figure 1 A top view of a box-type gas compressor according to a first embodiment is shown. Figure 4 The structure is viewed from the right side panel Figure 1 FIG. 1 is a diagram showing a cooling fan and a portion of an intake and exhaust duct of a box-type gas compressor according to a first embodiment. Figure 1 In the figure, the state of the package and pipeline is shown. Figure 2 In the figure, the back panel and the pipes are visible. Figure 3 The status of the upper panel in the perspective. Figure 4In addition, in this description, the left-right direction indicates the direction when the box-type gas compressor is viewed from the front side.

[0025] exist Figure 1 In the box-type gas compressor, various components including a compressor body 2 are housed inside a casing 1 as a package. The components of the box-type gas compressor include a compressor body 2 capable of compressing gas, a power machine 3 driving the compressor body 2, an air cooler 4 for cooling the compressed gas (fluid) discharged from the compressor body 2, an oil cooler 5 for cooling the lubricating oil (fluid) supplied to the compressor body 2, an oil tank 6 for temporarily storing the lubricating oil (fluid) supplied to the compressor body 2, a cooling fan 7 for generating cooling air inside the casing 1, a starter disk 8 having a control circuit for controlling the drive of the power machine 3 and the cooling fan 7, and the like. The compressor body 2 is, for example, a screw compressor including a screw rotor having twisted teeth. The power machine 3 is, for example, a screw rotor rotating around an axis of rotation Am (see Figure 2 and Figure 3 ) is a motor that rotates. The air cooler 4 is an air-cooled heat exchanger that cools the compressed gas introduced from the compressor body 2 by the passage of cooling air, 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 the passage of cooling air, and has an inlet surface 5a into which the cooling air flows. The cooling fan 7 is, for example, a heat exchanger that rotates around the rotation axis Af (see Figure 2 and Figure 3 )A rotating centrifugal fan has a fan motor housed inside.

[0026] 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 devices 2, 3, 4, 5, 6, 7, and 8; and an upper panel 12 that closes the upper end opening of the side panel. The base 11 is formed in a rectangular shape when viewed from the upper side. The side panel is composed of, for example, a front panel 13, a back panel 14 opposite to the front panel 13, a left side panel 15 connecting the left end of the front panel 13 and the left end of the back panel 14, and a right side panel 16 connecting the right end of the front panel 13 and the right end of the back panel 14. The front panel 13 is provided with an operation switch, a monitor, etc., which are not shown.

[0027] The compressor body 2 and the motor 3 are integrated in such a way that their axial directions are parallel to each other to form a main body unit. Figure 1 and Figure 2 As shown, the main units 2 and 3 are arranged at the lower side of the housing 1, for example, on the base 11. The main units 2 and 3 are arranged horizontally in such a manner that the axial direction of the compressor body 2 and the rotation axis Am of the motor 3 are substantially parallel to the installation surface of the base 11. Figure 1 and Figure 3As shown, the main units 2 and 3 are arranged so as to extend in the left-right direction (the width direction of the housing 1) between the left side panel 15 and the right side panel 16, and are arranged at a position closer to the back panel 14 (on the back panel 14 side) than the front panel 13 in the housing 1. The main units 2 and 3 are arranged so that the compressor body 2 is located on the left side panel 15 side and the motor 3 is located on the right side panel 16 side.

[0028] For example Figure 1 and Figure 3 As shown in FIG. 1 , an oil tank 6 and a starter disk 8 are arranged on the front panel 13 side in the housing 1. The oil tank 6 is arranged on the left side panel 15 side adjacent to the compressor body 2, for example. Figure 1 and Figure 2 As shown, the oil tank 6 is a container extending in the vertical direction and is disposed on the base 11. Figure 1 to Figure 3 As shown, the starter disk 8 is provided on the base 11 and is arranged on the right side panel 16 side along the front panel 13 so as to be adjacent to the motor 3 .

[0029] like Figure 1 and Figure 2 As shown in FIG. 1 , a cooling fan 7, an air cooler 4, and an oil cooler 5 are arranged on the upper side of the housing 1. That is, the cooling fan 7, the air cooler 4, and the oil cooler 5 are located above the main units 2 and 3. Figure 1 to Figure 3 As shown, the cooling fan 7 is arranged in such a manner that the rotation axis Af is orthogonal to the height direction of the housing 1, and is arranged in such a manner that it is approximately parallel to the rotation axis Am of the motor 3 (the axial direction of the compressor body 2). That is, the cooling fan 7 is arranged in such a manner that the rotation axis Af extends in the left-right direction (the width direction of the housing 1). The cooling fan 7 is arranged, for example, in such a manner that the position in the left-right direction (the width direction of the housing 1) overlaps with a part of the motor 3, and is arranged in such a manner that the suction side faces the compressor body 2 (the left side panel 15).

[0030] The air cooler 4 and the 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 the oil cooler 5 are connected to the cooling fan 7 via a fan suction duct 21. The fan suction duct 21 rectifies the flow of cooling air from the air cooler 4 and the oil cooler 5 to the cooling fan 7. The air cooler 4 and the oil cooler 5 are arranged in such a manner that the inflow surface 4a and the inflow surface 5a of the cooling air are respectively orthogonal to the rotation axis Af of the cooling fan 7. The air cooler 4 and the oil cooler 5 are arranged, for example, side by side with respect to the rotation axis Af of the cooling fan 7, and their inflow surfaces 4a, 5a constitute one inflow surface of the cooling air. The air cooler 4 and the oil cooler 5 are, for example, Figure 2 and Figure 3As shown in FIG. 1 , the compressor body 2 is arranged so as to overlap with a part of the compressor body 2 in the left-right direction (the width direction of the housing 1). Figure 2 and Figure 3 As shown, the compressor body 2 is arranged so as to overlap with the area between the air cooler 4 and the oil cooler 5 and the left side panel 15 (a side panel of the housing 1 that is opposite to the inflow side of the cooling air of the air cooler 4 and the oil cooler 5 in the extending direction of the rotation axis Af of the cooling fan 7) in the extending direction of the rotation axis Af of the cooling fan 7. In addition, the compressor body 2 is arranged so as to be located on the oil cooler 5 side of the air cooler 4 and the oil cooler 5.

[0031] For example Figure 1 As shown, the cooling fan 7 is accommodated in an exhaust duct 22 disposed in the housing. The exhaust duct 22 has its outlet connected to the exhaust port 19 of the upper panel 12 of the housing 1, and is a duct that guides the cooling air discharged from the cooling fan 7 to the exhaust port 19 described later. The exhaust duct 22 is, for example, a square duct with a rectangular flow path cross section, and is configured so that the center line Cd extends in the height direction (vertical direction) of the housing 1. For example, Figure 4 As shown in FIG. 1 , the cooling fan 7 is configured to rotate counterclockwise when viewed from the right side panel 16. Figure 3 and Figure 4 As shown, the cooling fan 7 is arranged in the exhaust duct 22 in such a manner that the rotation axis Af does not intersect with the center line Cd of the exhaust duct 22 and is offset to the front panel 13. That is, the cooling fan 7 is arranged in the exhaust duct in such a manner that the rotation axis Af is offset to the side of the area below the rotation direction of the cooling fan 7 in the height direction of the housing when viewed from one side of the extension direction of the rotation axis Af relative to the center line Cd of the exhaust duct 22.

[0032] like Figure 1 to Figure 3 As shown, an air intake port 17 for sucking external air (cooling wind) into the housing 1 is provided on the lower side of the right side panel 16 and the back panel 14 side in the side panel of the housing 1. That is, the air intake port 17 is provided in a manner overlapping with the main units 2 and 3 in the height direction (up and down direction) of the housing 1, and is provided in a manner located in the extension direction of the rotation axis Af of the cooling fan 7. In addition, the air intake port 17 is provided on the side of the main units 2 and 3 close to the motor 3. That is, the air intake port 17 is provided at a position closer to the cooling fan 7 than the air cooler 4 and the oil cooler 5 in the air cooler 4 and the oil cooler 5 and the cooling fan 7. In the housing 1 of the present embodiment, only one air intake port 17 is formed. An exhaust port 19 for discharging cooling wind to the outside of the housing 1 is provided on the upper panel 12 of the housing 1.

[0033] Next, use Figure 1 to Figure 4The operation and effects of the box-type gas compressor according to the first embodiment will be described. Figure 2 In the figure, the dotted arrows indicate the flow of cooling air. Figure 3 In the figure, the hollow dashed arrows represent the flow of cooling air.

[0034] In the box-type gas compressor of the above structure, Figure 1 The compressor body 2 shown is driven by the motor 3 to compress the gas, and the high-temperature compressed gas discharged from the compressor body 2 is introduced into the air cooler 4. At this time, the compressor body 2 itself is heated by the compression of the gas, and the motor 3 itself also generates heat. In addition, the oil in the oil tank 6 is supplied to the compressor body 2 via the oil cooler 5, and the oil that becomes high temperature in the compressor body 2 returns to the oil tank 6.

[0035] At this time, the cooling fan 7 is driven to generate cooling air in the housing 1. The cooling air cools the compressor body 2 and the motor 3, and cools the compressed gas flowing through the air cooler 4 and the oil flowing through the oil cooler 5.

[0036] Specifically, if Figure 2 and Figure 3 As shown, cooling air (external air) flows in from the air inlet 17 provided on the lower side of the right side panel 16 of the housing 1, and flows toward the left side panel 15. The cooling air flowing in from the air inlet 17 first flows through the area of ​​the motor 3 and the starter disk 8 located at the same height as the air inlet 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 body 2 and the motor 3 (the extension direction of the main unit) on the lower side of the housing 1. Thus, the motor 3, the starter disk 8, the compressor body 2, and the oil tank are cooled. The cooling air turns in the vicinity of the left side panel 15 in a U-shaped manner from the lower side to the upper side of the housing 1, and is sucked into the cooling fan 7 after passing through the air cooler 4 and the oil cooler 5. The cooling air sucked into the cooling fan 7 is discharged from the exhaust port 19 of the upper panel 12 of the housing 1 via the exhaust duct 22.

[0037] In the present embodiment, the cooling fan 7 is arranged in such a manner that the rotation axis Af of the cooling fan 7 is parallel to the installation surface of the base 11 of the housing 1, and the air cooler 4 and the oil cooler 5 as heat exchangers are arranged on the suction side of the cooling fan 7. According to this structure, the flow of the cooling air turns in a U-shaped manner from the lower side to the upper side of the housing 1, 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, thereby rectifying the flow of the cooling air on the upstream side of the cooling fan 7 in a manner that alleviates the deviation of the speed distribution (pressure loss) of the cooling air. Therefore, compared with the case of the structure in which the cooling fan is arranged in a manner in which the rotation axis of the cooling fan extends in the vertical direction of the housing 1, the diameter of the flow of the cooling air turned from the lower side to the upper side 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 structure 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 turned from the lower side to the upper side of the shell 1 and flows toward the air cooler 4 and the oil cooler 5 to the position of the end of the left side panel 15 side of the compressor body 2 and near the configuration position of the oil tank 6, so that the compressor body 2 and the oil tank 6 are efficiently cooled.

[0038] In addition, in the case of this structure, the speed of the cooling wind in the area that is folded back in a U shape from the lower side to the upper side of the housing 1 is faster than when it flows on the lower side of the housing 1. Therefore, in the present embodiment, when viewed from the upper side of the housing 1, most of the compressor body 2 and the oil tank 6 are arranged between the oil cooler 5 and the left side panel 15 (the side panel located on the suction side in the extension direction of the rotation axis Af of the cooling fan 7). In this case, at the position of the compressor body 2 and the oil tank 6, the cooling wind is turned in a manner that is folded back in a U shape from the lower side to the upper side of the housing 1. Therefore, the compressor body 2 and the oil tank 6 are efficiently cooled by the cooling wind at a relatively fast speed.

[0039] In addition, as described above, the cooling fan 7 is arranged so that the rotation axis Af is parallel to the installation surface of the base 11 of the housing 1. In the case of this structure, the opening area of ​​the exhaust port 19 can be reduced compared to the case of a structure in which the cooling fan is arranged so that the rotation axis extends in the vertical direction of the housing 1. Therefore, by reducing the opening area of ​​the exhaust port 19, the noise passing through the exhaust port 19 can be reduced.

[0040] In addition, in the present embodiment, the air cooler 4 and the oil cooler 5 are arranged in parallel on the suction side of the cooling fan 7. In the case of this structure, the area of ​​the cooling air rectified by the air cooler 4 and the oil cooler 5 on the upstream side of the cooling fan 7 becomes wider. As a result, the degree of freedom of the arrangement of the cooling fan 7 becomes higher.

[0041] In addition, in the present embodiment, when viewed from one side in the extending direction of the rotation axis Af of the cooling fan 7, the cooling fan 7 is arranged in the exhaust duct 22 in such a manner that the rotation axis Af is offset to the side facing downward in the rotation direction of the cooling fan 7 relative to the center line Cd of the exhaust duct 22 extending in the vertical direction. In the case of this structure, 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 loss of the cooling air is reduced, and the air volume of the cooling air can be increased.

[0042] In addition, in the present embodiment, the cooling fan 7 is arranged so that 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 arranged in parallel. According to this structure, the oil cooler 5 having a larger heat exchange amount than the air cooler 4 can increase the cooling air volume compared with the air cooler 4.

[0043] In addition, in a box-type gas compressor, the side of the package body on which the air intake port is formed needs to be separated by a certain distance from the wall surface present at the installation location in order not to hinder the air intake. That is, the box-type gas compressor has restrictions on the installation position according to the air intake port of the package body. In the present embodiment, only one air intake port 17 is provided for the shell 1. Therefore, the side panels 13, 14, and 15 of the shell 1 other than the right side panel 16 provided with the air intake port 17 do not need to be separated by a specified distance from the wall surface present at the installation location of the box-type gas compressor. Therefore, there are fewer restrictions on the installation location of the box-type gas compressor, the freedom of the installation location of the box-type gas compressor is greater, and space saving of the installation location can be achieved.

[0044] In this embodiment, the motor 3 can rotate in the opposite direction to the cooling fan 7. In this case, the vibration of the motor 3 and the cooling fan 7 cancel each other out, thereby reducing the vibration of the entire box-type gas compressor.

[0045] As described above, the box-type gas compressor of the first embodiment includes: a compressor body 2 capable of compressing gas; 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 cooling air passing therethrough; and a housing 1 that accommodates the compressor body 2, the cooling fan 7, the air cooler 4, and the oil cooler 5 (heat exchanger). The housing 1 has an air intake 17 for cooling air on the side surfaces 13, 14, 15, and 16 that surround the compressor body 2, the cooling fan 7, the air cooler 4, and the oil cooler 5 (heat exchanger). The compressor body 2 is arranged at the lower part of the housing 1. The cooling fan 7 is arranged above the compressor body 2 and arranged in a manner 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 at the suction side of the cooling fan 7. The air intake port 17 is provided so as to overlap with the compressor body 2 in the height direction of the housing 1, and is provided at a position closer to the cooling fan 7 than the air cooler 4 and the oil cooler 5 (heat exchanger) among the air cooler 4, the oil cooler 5 (heat exchanger), and the cooling fan 7. The compressor body 2 is arranged so as to overlap with the area between the air cooler 4 and the oil cooler 5 (heat exchanger) and the opposite surface of the side surfaces 13, 14, 15, 16 of the housing 1, that is, the left side panel 15, in the extending direction of the rotation axis Af of the cooling fan 7.

[0046] According to this structure, the cooling fan 7 disposed above the compressor body 2 is disposed in such a manner 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 disposed at the suction side of the cooling fan 7, and the air intake port 17 is disposed at the height of the compressor body 2 at a position closer to the cooling fan 7 than the air cooler 4 and the oil cooler 5 (heat exchanger), thereby turning the flow of cooling air in such a manner that it turns back in a U-shape from the lower part to the upper part of the housing 1 and flows into a large area of ​​the air cooler 4 and the oil cooler 5 (heat exchanger). In addition, by arranging the compressor body 2 in such a manner as to overlap with the area between the air cooler 4 and the oil cooler 5 (heat exchanger) and the left side panel 15 (side surface) of the housing 1, the compressor body 2 is located in the area of ​​the cooling air turned back in a U-shape, so that the cooling performance of the compressor body 2 can be improved compared with the case where the cooling fan is arranged in such a manner that the rotation axis extends in the height direction of the housing 1 and the heat exchanger is arranged on the downstream side of the cooling fan. Therefore, noise reduction can be achieved by reducing the opening area of ​​the air intake port 17 or the like, and the soundness of the cooling performance can be maintained.

[0047] In the box-type gas compressor of this embodiment, only one air inlet 17 is formed on the housing 1. According to this structure, since the restrictions on the installation of the box-type gas compressor are reduced, the freedom of installation of the box-type gas compressor can be increased and the installation space of the box-type gas compressor can be reduced.

[0048] In addition, in the present embodiment, the air intake port is provided in the side surfaces 13, 14, 15, 16 of the housing 1, which is located in the extension direction of the rotation axis Af of the cooling fan 7, i.e., the right side panel 16. According to this structure, the flow of cooling air from the air intake port 17 toward the cooling fan 7 flows along the extension direction of the rotation axis Af of the cooling fan 7, so that cooling can be performed widely from one end side to the other end side in the extension direction of the rotation axis Af of the cooling fan 7 in the housing 1.

[0049] In addition, the compressor body 2 of the present embodiment is of a screw type, and is arranged in a manner that its axial direction is parallel to the rotation axis Af of the cooling fan 7. According to this structure, since the compressor body 2 is arranged in a manner that the axial direction is along the flow of cooling air, cooling is performed over the entire length of the compressor body 2, and efficient cooling can be achieved.

[0050] Furthermore, in the box-type gas compressor of the present embodiment, the cooling fan 7 is a centrifugal fan, and an exhaust port 19 for cooling air is formed on the upper panel 12 (upper surface) of the housing 1. According to this structure, compared with the case where the exhaust port is provided in the axial direction of the cooling fan 7, the opening area of ​​the exhaust port 19 can be reduced, so that the noise can be reduced.

[0051] In addition, the box-type gas compressor of this embodiment is provided with an exhaust duct 22 in the housing 1 for guiding cooling air to the exhaust port 19 of the housing 1. The exhaust duct 22 is configured in such a manner that the center line Cd extends in the height direction of the housing 1. The cooling fan 7 is accommodated in the exhaust duct 22, and is arranged in such a manner that the rotation axis Af is offset relative to the center line Cd of the exhaust duct 22 toward the lower region side in the height direction of the housing 1 in the rotation direction of the cooling fan 7.

[0052] 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 the pressure loss caused by the non-uniform flow of the centrifugal fan 7 in the exhaust duct 22 .

[0053] In addition, the box-type gas compressor of this embodiment is provided with an oil tank 6 (tank) storing lubricating oil (fluid) supplied to the compressor body 2 in the casing 1. The oil tank 6 (tank) is arranged so as to overlap the area between the air cooler 4 and the oil cooler 5 (heat exchanger) and the left side panel 15 which is the opposite surface of the casing 1 in the extending direction of the rotation axis Af of the cooling fan 7.

[0054] According to this structure, since the oil tank 6 (tank) is located in the area of ​​the cooling air folded back in a U shape, the cooling performance of the compressor body 2 can be improved compared to a structure in which the cooling fan is arranged in a manner that the rotation axis extends in the height direction of the shell 1 and the heat exchanger is arranged on the downstream side of the cooling fan.

[0055] [Modification of the first embodiment]

[0056] Next, use Figure 5 A box-type gas compressor according to a modified example of the first embodiment will be described by way of example. Figure 5 FIG. 1 is a top view of a box-type gas compressor showing a modified example of the first embodiment. Figure 5 The top panel is shown in the perspective state. Figure 5 In, with Figure 1 to Figure 4 The parts denoted by the same reference numerals are the same parts, and thus their detailed description is omitted.

[0057] Figure 5 The box-type gas compressor of the modified example of the first embodiment shown in FIG. 1 is different from the box-type gas compressor of the first embodiment (see FIG. Figure 3 ) is different in that the position of the air inlet 18 formed in the housing 1A is different, and the motor 3A has a self-cooling fan 31 relative to the change in the position of the air inlet 18. Specifically, Figure 3 The housing 1 of the first embodiment shown has an air intake port 17 on the lower side of the right side panel 16. In contrast, the housing 1A of this modified example 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 air intake port 18 is provided on the side panel, i.e., the back panel 14, in a direction orthogonal to the extension direction of the rotation axis Af of the cooling fan 7. Therefore, it is necessary to turn the flow of cooling air generated by the cooling fan 7 in the area flowing in from the air intake port 18 toward the extension direction of the rotation axis Af of the cooling fan 7. Therefore, the motor 3A is formed to have a structure having a self-cooling fan 31. The self-cooling fan 31 has a function of turning the cooling air along the extension direction of the main units 2 and 3 (the extension direction of the rotation axis Af of the cooling fan 7) by sucking the cooling air flowing in from the air intake port 18. In addition, the air intake port 18 is formed so that its opening center 18a is located at a position closer to the right side panel 16 than the self-cooling fan 31 of the motor 3A.

[0058] In this modification, due to the restriction of the installation position of the box-type gas compressor, it is effective when the right side panel 16 is not provided with an air intake port. In this structure, the airflow near the area flowing in from the air intake port 18 of the back panel 14 is different from that in the first embodiment, and thus, the air volume of the cooling air flowing around the motor 3A and the starter disk 8 changes, but the airflow on the downstream side from the area on the compressor body 2 and the oil tank 6 side is almost the same.

[0059] According to the modified example of the first embodiment described above, as in the case of the first embodiment, the flow of cooling air is turned in a manner such that it folds back in a U-shape from the lower part of the housing 1A to the upper part and flows into a wider area between the air cooler 4 and the oil cooler 5 (heat exchanger). In addition, by arranging the compressor body 2 in a manner overlapping the area between the air cooler 4 and the oil cooler 5 (heat exchanger) and the left side panel 15 (side) of the housing 1A, the compressor body 2 is located in the area of ​​the cooling air folded back in a U-shape, so that the cooling performance of the compressor body 2 can be improved compared with the case where the cooling fan is arranged in a manner such that the rotation axis extends in the height direction of the housing 1A and the heat exchanger is arranged on the downstream side of the cooling fan. Therefore, it is possible to achieve a reduction in noise by reducing the opening area of ​​the air intake port 18, etc., and maintain the soundness of the cooling performance.

[0060] Furthermore, in the box-type gas compressor of this modified example, the air intake port 18 is provided in the side surfaces 13, 14, 15, 16 of the housing 1A, that is, in the portion of the back panel 14 in the direction orthogonal to the rotation axis Af of the cooling fan 7. According to this structure, it is a structure that can be adopted when the air intake port cannot be provided on the right side panel 16 in the direction in which the rotation axis Af of the cooling fan 7 extends as shown in the first embodiment due to the constraints of the installation of the box-type compressor.

[0061] [Second embodiment]

[0062] Next, use Figure 6 A box-type gas compressor according to a second embodiment of the present invention will be described with examples. Figure 6 It is a top view showing a box-type gas compressor according to a second embodiment. Figure 6 In the figure, the upper panel is visible. Figure 6 In, with Figure 1 to Figure 5 The parts with the same reference numerals as shown are the same parts, and thus their detailed description is omitted.

[0063] Figure 6 The box-type gas compressor of the second embodiment shown in FIG. Figure 3) is different from the structure in which the number of air intake ports of the housing 1B is increased from 1 to 2 and a sound insulation board 24 is arranged in response to the increase in the number of air intake ports. Specifically, the housing 1B has not only an air intake port 17 formed on the right side panel 16, but also 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 air intake ports 17 and 18 formed at different positions. The additional 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 on the motor 3 side of the main units 2 and 3. The air intake port 18 of the back panel 14 is formed, for example, to have an opening area smaller than that of the air intake port 17 of the right side panel 16. A sound insulation board 24 is arranged between the air intake port 17 of the right side panel 16 and the motor 3 of the main units 2 and 3. The sound insulation board 24 is arranged in a manner opposite to the air intake port 17 of the right side panel 16, and is a component that reduces the noise emitted from the air intake port 17.

[0064] In this embodiment, even if the cooling air flowing in from the air intake port 17 of the right side panel 16 is blocked by the sound insulation board 24 and the like and the air volume is reduced, the cooling air flowing in from the air intake port 18 of the back panel 14 can be supplemented to flow around the motor 3 and ensure the necessary amount of cooling air.

[0065] In addition, in the present embodiment, a sound insulating plate may be arranged near the air inlet 18 of the rear panel 14 .

[0066] According to the box-type gas compressor of the second embodiment described above, as in the case of the first embodiment, the flow of cooling air is turned in a manner such that it is folded back in a U-shape from the lower part of the housing 1B to the upper part and flows into a wider area of ​​the air cooler 4 and the oil cooler 5 (heat exchanger). Furthermore, by arranging the compressor body 2 in a manner overlapping the area between the air cooler 4 and the oil cooler 5 (heat exchanger) and the left side panel 15 (side) of the housing 1B, the compressor body 2 is located in the area of ​​the cooling air folded back in a U-shape, so that the cooling performance of the compressor body 2 can be improved compared with the case where the cooling fan is arranged in a manner that the rotation axis extends in the height direction of the housing 1B and the heat exchanger is arranged on the downstream side of the cooling fan. Therefore, the noise can be reduced by reducing the opening area of ​​the air intake ports 17 and 18, and the soundness of the cooling performance can be maintained.

[0067] In the box-type gas compressor of the present embodiment, a plurality of air inlets 17 and 18 are formed in the casing 1B. A soundproofing plate 24 is disposed in the casing 1 so as to face at least one of the air inlets 17 and 18.

[0068] According to this configuration, the total opening area of ​​the air intake ports 17 and 18 can be increased to improve the cooling performance, and noise reduction can be achieved by the sound insulation board 24 .

[0069] [Other embodiments]

[0070] In addition, the present invention is not limited to the above-mentioned embodiments, and includes various modified examples. The above-mentioned embodiments are embodiments described in detail in order to easily understand the present invention, and are not limited to all structures described. That is, a part of the structure of a certain embodiment can be replaced with the structure of other embodiments, and the structure of other embodiments can be added to the structure of a certain embodiment. In addition, for a part of the structure of each embodiment, other structures can also be added, deleted, or replaced.

[0071] For example, in the above-mentioned embodiment and its modified example, the cooling fan 7 is configured as a centrifugal fan. However, the cooling fan may be configured as an axial flow fan or a diagonal flow fan.

[0072] In addition, in the above-mentioned embodiment and its modification, the case 1 is formed into a rectangular parallelepiped, and the side panel is composed of the front panel 13, the back panel 14, the left side panel 15 and the right side panel 16. However, the shape of the package is arbitrary, and the side panel of the package may be a polygonal tube or cylindrical structure.

[0073] In addition, in the above-mentioned embodiment and its modified example, an example of a structure 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, if the air cooler 4 and the oil cooler 5 are arranged in parallel and cannot be accommodated in the housing 1, the air cooler 4 and the oil cooler 5 may be arranged in series (in-line) with respect to the rotation axis Af of the cooling fan 7.

[0074] In addition, relative to the above-mentioned embodiment and its variations, the configuration of the components 2, 3, 4, 5, 6, 7, 8 in the shell 1 and the formation positions of the air intake port 17 and the air exhaust port 19 of the shell 1 can also be reversed in the front-to-back direction (the depth direction of the shell 1) or the left-to-right direction (the width direction of the shell 1).

[0075] In addition, in the above-mentioned first embodiment and its modified examples, a soundproofing plate and a dryer may be arranged in the housing 1, 1A. The dryer removes moisture from the compressed gas discharged from the compressor body 2. In addition, in the above-mentioned first embodiment, similarly to its modified examples, the motor 3 may have a self-cooling fan.

[0076] Description of Reference Numerals

[0077] 1. 1A, 1B…housing

[0078] 2…Compressor body

[0079] 3. 3A…Electric motor

[0080] 4…Air cooler (heat exchanger)

[0081] 5…Oil cooler (heat exchanger)

[0082] 6…Oil tank

[0083] 7…Cooling fan

[0084] 13…Front panel (side)

[0085] 14…Back panel (side)

[0086] 15…Left side panel (side, opposite side)

[0087] 16...Right side panel (side)

[0088] 17…Intake port

[0089] 18…Intake port

[0090] 19…Exhaust port

[0091] 22…Exhaust pipe

[0092] Af…Axis of rotation

[0093] Cd…center line.

Claims

1. A box-type gas compressor, characterized in that: include: A compressor body capable of compressing gas; A cooling fan that generates cooling air by rotating about a rotation axis; an air-cooling heat exchanger for cooling the fluid introduced from the compressor body by the passage of the cooling wind; and a housing for accommodating the compressor body, the cooling fan and the heat exchanger, The housing has an air intake port for the cooling air on a side surface surrounding the compressor body, the cooling fan, and the heat exchanger. The compressor body is arranged at the lower part of the housing. The cooling fan is arranged above the compressor body and arranged so that the rotation axis is orthogonal to the height direction of the housing. The heat exchanger is arranged at a position on the suction side of the cooling fan. The air intake port is provided so as to overlap with the compressor body in the height direction of the housing and is provided at a position closer to the cooling fan than the heat exchanger, between the heat exchanger and the cooling fan. The compressor body is arranged to overlap a region between the heat exchanger and a surface of the side surface of the housing that faces an inflow side of the heat exchanger into which the cooling air flows, in an extending direction of the rotation axis of the cooling fan.

2. The box-type gas compressor according to claim 1, characterized in that: Only one air inlet is formed in the housing.

3. The box-type gas compressor according to claim 2, characterized in that: The air intake port is provided at a portion of the side surface of the housing that is located in the extending direction of the rotation axis of the cooling fan.

4. The box-type gas compressor according to claim 2, characterized in that: The air intake port is provided at a portion of the side surface of the housing in a direction perpendicular to the rotation axis of the cooling fan.

5. The box-type gas compressor according to claim 3, characterized in that: The compressor body is a screw type, and is arranged so that the axial direction thereof is parallel to the rotation axis of the cooling fan.

6. The box-type gas compressor according to claim 1, characterized in that: The air inlet is formed in a plurality on the housing. A sound insulating plate is disposed in the casing so as to face at least one of the air intake ports.

7. The box-type gas compressor according to claim 1, characterized in that: The cooling fan is a centrifugal fan, An exhaust port for the cooling air is formed on an upper surface of the housing.

8. The box-type gas compressor according to claim 7, characterized in that: An exhaust duct is provided in the housing to guide the cooling air toward the exhaust port of the housing. The exhaust duct is configured such that the center line extends in the height direction of the housing. The cooling fan is accommodated in the exhaust duct. The cooling fan is disposed such that the rotation axis is offset from the center line of the exhaust duct to a region that faces downward in the height direction of the housing in the rotation direction of the cooling fan.

9. The box-type gas compressor according to claim 1, characterized in that: A tank for storing a fluid to be supplied to the compressor body is provided in the housing. The canister is arranged so as to overlap a region between the heat exchanger and the opposing surface of the side surface of the casing in the extending direction of the rotation axis of the cooling fan.

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