JP2005171958A - Package type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a package type compressor with low power consumption by reducing the power consumption of a fan for cooling and ventilating the inside of a package while ensuring a necessary air volume.
In a package type compressor 1 in which a compressor body 50, a motor 60, an oil separator 70 and an oil cooler 80 are accommodated in a package 10, the motor 60 and the motor 60 are placed in the same chamber formed in the package 10. The air intake duct 14 that guides the cooling air flowing in from the cooling air inlet 13 provided in the package 10 to the flow along the outer periphery of the motor 60, and the cooling air guided around the motor 60 is an oil cooler. After passing 80, an exhaust duct 17 is provided for guiding to the cooling air outlet 16 provided in the package 10.
A fan 64 attached to the drive shaft of the motor 60 is provided in the intake duct 14 to generate a flow of the cooling air from the cooling air inlet 13 to the cooling air outlet 16.
[Selection] Figure 1

Description

  The present invention relates to a package type compressor in which a compressor main body, a motor that drives the compressor main body, an oil separator, an oil cooler, and other devices constituting the compressor are housed in a package. The present invention relates to a package-type motor-driven compressor provided with a cooling mechanism for cooling equipment housed in the housing.

  In the package, the compressor body, the motor for driving the compressor, the oil separator for separating the lubricant discharged together with the compressed gas from the compressed gas, and the cooling oil separated and recovered in the oil separator The package type compressor that accommodates the oil cooler and the like cools the inside of the package, and introduces cooling air for heat exchange with the lubricating oil introduced into the oil cooler described above into the package. The structure for cooling is provided.

  As an example of such a package type compressor 1, as shown in FIG. 5, a first chamber 111 containing a motor 60 and a compressor main body 50 and a second chamber containing an oil cooler 80 and an aftercooler 81 are contained in the package 10. A fan 64 provided on the motor 60 is disposed so as to face the first air inlet 131 formed on the side wall of the first chamber 111 and is divided into the chamber 112 by a partition plate 181, and the main shaft of the motor is separated from the partition. A double-suction multi-blade fan 66 is attached to the main shaft in the second chamber 112 through the opening 182 formed in the plate 181, and the second air is attached to the side wall of the second chamber 112. There is provided a package type compressor 1 in which an inlet 132 and an air outlet 161 are provided, and an aftercooler 81 and an oil cooler 80 are arranged in the package 10 so as to face the air outlet 161. (Patent Document 1).

  In the package-type compressor 1 having the above-described configuration, when the motor 60 rotates, the outside air is circulated through the first air inlet 131 by the cooling fan 64 that rotates as the motor 60 rotates. The motor 60 and other devices disposed in the first chamber 111 are cooled, and the first multi-blade fan 66 is rotated through the opening 182 formed in the partition plate 181 by the rotation of the both suction multiblade fans 66. The air in the chamber 111 is introduced into the second chamber 112, and an opening formed in the partition plate 181 from the first air inlet 131 by the action of the cooling fan 64, the suction multiblade fan 66, and the two fans. A flow of cooling air toward 182 is generated.

  The air in the first chamber 111 introduced into the second chamber 112 and the outside air introduced into the second chamber 112 through the second air inlet 132 provided on the side wall of the second chamber 112. Then, after being guided to the air outlet 161 by the both suction multi-blade fans 66 described above, the aftercooler 81 and the oil cooler 80 are cooled and then discharged outside the apparatus.

Prior art document information of the present invention includes the following.
JP-A-10-30594 (page 3-4, FIG. 1).

  In the package compressor 1 described in Patent Document 1 including the cooling mechanism described above, the cooling fan 64 is introduced into the first chamber 111 that houses the motor 60 through the first air inlet 131. Air outside the machine is introduced, and the air that has cooled the inside of the first chamber 111 is introduced into the second chamber 112 through the opening 182 formed in the partition plate 181 by the double suction type multiblade fan 66. Therefore, the cooling fan 64 is not returned to the side, and as a result, the cooling efficiency of the motor 60 can be improved.

  However, in the package type compressor 1 configured as described above, the cooling air introduced into the package 10 by the cooling fan 64 via the first air inlet 131 is sucked and guided by the double suction multiblade fan 66. As a result, the plurality of fans 64 and 66 are required, so that the number of manufacturing steps increases due to an increase in the number of parts, and the manufacturing cost increases. Moreover, the power for rotating a plurality of fans is required, and the power consumption increases.

  In the conventional package type compressor 1 described above, the air sucked into the first chamber 111 by the cooling fan 64 is sucked into the second chamber 112 by the both suction multi-blade fans 66 and the air outlet 161. Since the two fans 64 and 66 are provided in the same cooling air flow path, the air introduced into the first chamber 111 by the cooling fan 64 is discharged from the package 10 to the outside of the package 10. If the amount of air in the first chamber 111 introduced into the second chamber 112 by the double suction multiblade fan 66 with respect to the amount (air flow) is large, the inside of the first chamber 111 becomes a strong negative pressure, and the double suction multiblade The power required to rotate the fan 66 increases.

  Further, if the amount of air introduced from the first chamber 111 into the second chamber 112 is reduced by the negative pressure of the first chamber 111, an air volume necessary for cooling the oil cooler 80 and the aftercooler 81 is obtained. There is a risk of not being able to.

  Therefore, in the invention described in Patent Document 1, the second air inlet 132 for directly introducing the outside air into the second chamber 112 is provided separately from the first air inlet 131, and the first The fan 66 provided in the two chambers 112 is of the double suction type, and the air in the first chamber 111 is sucked through the opening 182 formed in the partition plate 181 and the second air inlet 132 is interposed. The outside air can be introduced at the same time. Therefore, the structure of the entire apparatus is complicated.

  On the contrary, the amount of air (air volume) introduced from the first chamber 111 to the second chamber 112 by the double suction multiblade fan 66 is different from the amount of air introduced into the first chamber 111 by the cooling fan 64. If it is small, there is a problem that the pressure in the first chamber 111 becomes high and the power consumption of the cooling fan 64 becomes larger than necessary, and the power consumption accompanying this increases, which is not economical.

  As described above, the problem that the amount of air for cooling the oil cooler 80 is insufficient or the power for operating the fan is increased to increase the power consumption is described in Patent Document 1 described above. This problem may occur when a plurality of fans are arranged in series in the same cooling air flow path, and such a problem occurs when the amount of air sucked into the respective fans does not match.

  In the case where the fans are arranged in series in this way, in view of the fact that it is very difficult to match the intake air amount (air volume) of each fan by design, the above configuration is adopted as long as the above-described configuration is adopted. It is difficult to solve the problem.

  Therefore, the present invention has been made for the purpose of eliminating the disadvantages of the prior art described above with a relatively simple device configuration, and is necessary for cooling the motor that drives the compressor body and the oil cooler. An object of the present invention is to provide a package type compressor that consumes less power and reduces the power consumption of a fan that cools and ventilates the inside of the package while securing the air volume.

In order to achieve the above object, the cooling mechanism for a motor-driven compressor according to the present invention is a package-type compressor 1 in which a compressor body 50, a motor 60, an oil separator 70 and an oil cooler 80 are housed in a package 10.
In the same room formed in the package 10, the motor 60, and an intake duct 14 that guides the cooling air flowing from the cooling air inlet 13 provided in the package 10 to the flow along the outer periphery of the motor 60, An exhaust duct 17 for guiding the cooling air guided along the outer periphery of the motor 60 through the oil cooler 80 and then guiding it to the cooling air discharge port 16 provided in the package;
A fan 64 attached to a drive shaft of the motor 60 and generating a flow of cooling air from the cooling air inlet 13 to the cooling air outlet 16 is disposed in the intake duct 14 ( Claim 1, FIG. 1. Refer to FIG. 3 and FIG.

  In the package type compressor 1 having the above-described configuration, it is possible to provide guidance means including, for example, a partition plate 18 or the like that guides the cooling air guided to the outer periphery of the motor 60 to the exhaust duct 17. Item 2), by the guiding means including the partition plate 18 and the like, the motor chamber 102 in which the motor 60 is accommodated in the package 10 and the compressor chamber in which other devices such as the compressor main body 50 and the oil separator 70 are accommodated It is good also as a structure divided | segmented into 101. FIG.

  Further, in the package type compressor 1 having the above-described configuration, the intake duct 14 and the exhaust duct 17 are communicated (in the illustrated example, by an intermediate duct 19), and the cooling air outlet 16 and the cooling air outlet 16 are connected. The motor may be arranged in the series of ducts (refer to claim 3: FIG. 4).

  According to the configuration of the present invention described above, the flow of the cooling air from the cooling air inlet 13 to the cooling air outlet 16 can be generated by the single fan 64 disposed in the intake duct 14, and the cooling air inlet Since the entire amount of the outside air introduced into the package 10 through 13 passes through the outer periphery of the motor 60, the motor 60 could be efficiently cooled with less power consumption.

  In addition, since the configuration including only the single fan 64 can be achieved, the space in the package 10 can be reduced, and thus the package 10 itself can be reduced in size, and the single cooling air inlet 13 can be used. Since the cooling can be performed by the introduced cooling air, the structure of the package can be simplified and can be manufactured at low cost.

  Further, by providing guiding means such as the aforementioned partition plate 18 and guiding the cooling air guided to the outer periphery of the motor 60 to the exhaust duct 17, the flow resistance of the cooling air is reduced, so that the fan 64 can be rotated. The required power consumption could be further reduced.

  Further, the intake duct 14 and the exhaust duct 17 are communicated with each other by, for example, an intermediate duct 19 to form a series of ducts from the cooling air inlet 13 to the cooling air outlet 16, and the motor 60 is disposed in this duct. As a result, the flow resistance of the cooling air from the air inlet 13 to the air outlet 16 can be more reliably reduced, and the cooling air can be reliably guided to the outer periphery of the motor 60 to cool the motor 60. The efficiency could be further improved.

  Next, embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1
In FIG. 1, reference numeral 1 denotes a package type compressor provided with a cooling mechanism of the present invention.

  The package type compressor 1 includes an oil-cooled compressor main body 50 for compressing a compressed gas in the package 10, a motor 60 for driving the compressor main body 50, and a compressed gas from the compressor main body 50. An oil separator 70 for separating the lubricating oil discharged as a gas-liquid mixed fluid, an oil cooler 80 for cooling the recovered lubricating oil separated from the compressed gas in the oil separator 70, and other compressors are configured. It is configured to accommodate equipment to be used.

  In the present embodiment, the motor 60, the compressor body 50, and the oil separation device 70 described above are configured as a so-called motor-integrated compressor in which these are integrally formed, and this is disposed in the package 10. ing.

  In the motor-integrated compressor, as shown in FIG. 2, the compressor main body 50 accommodates a pair of male and female screw rotors 501 and 502 in a rotor chamber 504 of a cylinder 503 so as to be capable of meshing rotation. An oil-cooled compressor body that injects lubricating oil, which is a cooling medium, into the rotor chamber 504 in the process of introducing and compressing fuel gas by the rotation of the rotors 501 and 502, and the axis of the screw rotors 501 and 502 A fuel gas suction pipe 92 extending from the outside of the machine is connected to one side of the cylinder 503 with respect to the direction to form a suction port 505 for sucking fuel gas and a suction passage following the suction port. A suction-side casing 508 that houses bearings for supporting the suction-side rotor shafts 501a and 502a of 501 and 502, and the screw rotors 501 and 50; A discharge port and a discharge passage for discharging fuel gas are formed on the other side of the cylinder 503 with respect to the axial direction of the cylinder 503, and a discharge for housing a bearing for supporting the discharge side rotor shafts 501b and 502b of the screw rotors 501 and 502 Side casing 511.

  The suction-side casing 508 and the cylinder 503 are integrally formed, and the suction-side rotor shaft 501a of the male rotor 501 passes through the suction-side casing 508 and protrudes to the outside of the compressor body 50. The drive shaft.

  The oil separator 70 introduces a gas-liquid mixed fluid of fuel gas and lubricating oil compressed and discharged in the rotor chamber 504 of the compressor body 50, and separates the fuel gas and lubricating oil into fuel gas. This is supplied to the consumption side, and a receiver tank 71 that primarily separates the gas-liquid mixed fluid discharged from the compressor body 50, and a gas-liquid mixed fluid that is primarily separated in the receiver tank 71 are introduced to make fine A separator 72 for separating lubricating oil and supplying fuel gas to the consumption side via a fuel gas discharge pipe 91; and a connection port 73 for connecting the separator 72 to the receiver tank 71 and the interior of the receiver tank 71. An inspection port 74 for cleaning, a discharge-side casing 511 of the compressor body 50 is inserted into the receiver tank 71 from the inspection port 74, and the cylinder 503 The inspection port 74 formed by the opening of the receiver tank 71 is closed by a flange portion 77 formed at the connection portion with the discharge-side casing 511, and the compressor body 50 having the motor 60 fixed thereto is connected to the flange portion 77 as will be described later. The motor 60, the compressor main body 50, and the receiver tank 71 are integrally configured.

  The motor 60 that rotationally drives the compressor main body 50 has a rotor 61 fixed on the suction side rotor shaft 501a of the male rotor 501, thereby rotating the rotor shaft of the male rotor 501 and the rotor. The shaft and the rotation shaft of the motor 60 are all formed by a single shaft. Therefore, in this specification, the rotor shaft of the male rotor 501, the drive shaft for rotating the rotor, and the rotation shaft of the motor 60 all indicate the same member.

  Since the rotor shaft of the male rotor 501, the drive shaft for rotating the rotor, and the rotation shaft of the motor 60 are integrally formed as described above, the bearing 507 that supports the rotor shaft 501 a serves as the rotation shaft of the motor 60. The bearing 507 to be supported is also used. The stator 62 of the motor 60 is fixed in the motor casing 63.

  The motor 60 has an axial flow fan (propeller fan 64) attached to its drive shaft on the side opposite to the compressor main body. The propeller fan 64 is rotated by the rotation of the motor 60. The cooling air which will be described later is generated.

  A cooling fin 65 (see FIG. 1) is formed on the casing 63 of the motor 60 so as to protrude almost entirely. The cooling fin 65 comes into contact with cooling air, which will be described later, so that the motor 60 is cooled. It is configured to be.

  In the present embodiment, the motor 60, the compressor main body 50, and the oil separation device 70 are shown as an example configured as the above-described motor-integrated compressor in which these are integrally formed. The compressor main body 50 and the oil separation device 70 may be used by combining them separately in the package 10. In this case, a means for transmitting the rotation of the motor 60 to the drive shaft of the compressor body 50, such as a joint for connecting the rotation shaft of the motor 60 and the drive shaft of the compressor body 50, a pulley, a pulley belt, etc. The interlocking mechanism, the piping that communicates between the compressor main body 50 and the oil separation device 70, etc. are accommodated in the package 10 together with the motor 60, the compressor main body 50, and the like.

  The package 10 for accommodating the motor-integrated compressor configured as described above includes a frame 11 on which the motor-integrated compressor configured as described above is placed, and the motor-integrated compressor on the frame 11. Each component device of the compressor is surrounded by a package 10 formed by the hood 12 covering the frame 11 and the hood 12 (see FIG. 1).

  In the illustrated example, the motor-integrated compressor is mounted on the frame 11 with the drive shaft 501a in the horizontal direction, and a propeller fan 64 attached to one end of the drive shaft 501a of the motor 60 includes: Oppositely arranged on the inner surface of the side wall of the bonnet 12.

  A cooling air inlet 13 for introducing cooling air into the package 10 is formed on the side wall of the bonnet 12 opposed to the propeller fan 64, and the inside of the bonnet 12 at the position where the cooling air inlet 13 is formed is formed. An intake duct 14 is provided for converting the cooling air introduced into the package 10 through the cooling air inlet 13 into an air flow that flows along the outer periphery of the motor 60. A propeller fan 64 attached to one end of the drive shaft 501a of the motor 60 is disposed.

  In the illustrated embodiment, a cylindrical portion 15 having a slightly larger inner diameter than the outer diameter of the motor 60 is provided in the intake duct 14, and a propeller fan 64 provided in the motor 60 is provided in the cylindrical portion 15. In addition, the opening edge 15 a of the cylindrical portion 15 is arranged so as to be concentric with the outer periphery of the motor 60, and the inner periphery of the cylindrical portion 15 of the intake duct 14 and the casing 63 of the motor 60 are arranged. The cooling air is formed to flow along the outer periphery of the casing 63 of the motor 60 through a gap formed between the outer periphery.

  In the illustrated example, the cooling fin 65 described above is formed on the outer periphery of the casing 63 with the length direction of the drive shaft of the motor 60 as the length direction, and the inner periphery of the cylindrical portion 15 is provided in contact with the cooling fin 65. The cooling air is guided along the recesses formed between the cooling fins 65.

  The bonnet 12 of the package 10 is further provided with a cooling air discharge port 16 for discharging the cooling air introduced into the package 10 out of the package 10.

  The cooling air discharge port 16 can be provided at an appropriate position on the bonnet 12, but when the cooling air introduced into the package 10 reaches the cooling air discharge port 16, a position where it can follow a flow path with low flow resistance. It is preferable to configure.

  In the present embodiment, the cooling air discharge port 16 is formed in the upper portion of the arrangement position of the motor 60 and introduced into the package 10 through the cooling air inlet 13, and the cooling air that has cooled the motor 60 is Then, it is configured to flow upward and be discharged.

  Thus, in the illustrated embodiment, the cooling air corresponding to the formation position of the cooling air discharge port 16 formed on the top plate of the bonnet 12 is cooled, and the above-described cooling air that has cooled the motor 60 is cooled in the package 10. An exhaust duct 17 for guiding to the wind exhaust port 16 is formed.

  As described above, the exhaust duct 17 formed corresponding to the formation position of the cooling air discharge port 16 formed on the top plate of the bonnet 12 opens toward the motor 60 disposed below the exhaust duct 17. The cooling air after cooling the motor 60 can be suitably guided to the cooling air outlet 16.

  Oil for cooling the lubricating oil separated and recovered in the oil separation device 70 (receiver tank 71) in the flow path where the cooling air after cooling the motor 60 reaches the cooling air outlet 16 A cooler 80 is disposed, and the cooling air comes into contact with the core of the oil cooler 80 and exchanges heat with the lubricating oil before it is discharged to the outside through the cooling air discharge port 16 to cool the lubricating oil.

  The oil cooler 80 may be installed in any location as long as it is in the cooling air flow path from the cooling of the motor 60 to the cooling air discharge port 16. The oil cooler 80 is disposed in the exhaust duct 17 described above so that the cooling air after cooling the motor 60 and the lubricating oil can be heat-exchanged.

  In the package type compressor 1 of the present invention configured as described above, when the motor 60 is rotated, the propeller fan 64 attached to the drive shaft of the motor 60 is rotated, so that outside air is passed through the cooling air inlet 13. It is introduced into the package 10.

  Since the intake duct 14 is attached to the inner wall of the bonnet 12 at the position where the cooling air inlet 13 is formed as described above, the cooling air introduced into the package 10 through the cooling air inlet 13 is the intake air. It blows over the entire outer periphery of the motor through the duct 14 through a gap formed between the inner periphery of the cylindrical portion 15 and the outer periphery of the casing 63 of the motor 60.

  Thus, the cooling air blown out along the outer periphery of the motor 60 comes into contact with the cooling fins 65 protruding from the outer periphery of the casing 63 of the motor 60 to suitably cool the motor, and is guided to the cooling fins 65. And flows along the outer periphery of the motor 60.

  In this way, the cooling air after contacting the cooling fins 65 of the motor 60 and cooling the motor 60 cools and ventilates the inside of the package 10, and then is guided to the exhaust duct 17 and is then packaged from the cooling air discharge port 16. 10 is discharged outside.

  In the exhaust duct 17, an oil cooler 80 for cooling the lubricating oil separated and recovered by the oil separation device 70 as described above is disposed, and the cooling air passing through the exhaust duct 17 inevitably. The oil cooler 80 passes through the oil cooler 80 while in contact with the core of the oil cooler 80, and at this time, heat is exchanged with the lubricating oil to cool the lubricating oil.

  As described above, in the package type compressor 1 of the present invention, only the single propeller fan 64 attached to the drive shaft of the motor 60 is used to cool the motor 60, cool and ventilate the package 10, and the oil cooler 80. Compared with the case where a plurality of fans are provided, the power required for the rotation of the fans is less, the power consumption can be reduced, and the package 10 itself can be reduced in size. It can be manufactured at low cost by reducing the number of points.

  In particular, when a fuel gas such as liquefied petroleum gas (LPG) or city gas is used as the compressed gas, the compressed fuel gas is directly supplied from the outside of the package 10 via the fuel gas suction pipe 92 to the compressor main body 50. Since it is introduced into the suction port 505, the air in the package 10 is not introduced into the compressor body 50 and discharged outside the machine as compressed air, as in the case where the compressed gas is air.

  As a result, it is not necessary to consider the amount of air sucked by the compressor body 50 as the amount of air to be introduced into the package 10 through the cooling air inlet 13, and the propeller fan 64 is installed in comparison with the case of the air compressor. Can be small. As a result, the power required for the rotation of the propeller fan 64 can be further reduced, and the power consumption can be reduced.

  Further, since the cooling air introduced from outside the machine passes through the outer circumference of the motor 60 before passing through the oil cooler 80, the motor 60 can be sufficiently cooled and the motor 60 is cooled. High cooling efficiency.

[Embodiment 2]
In the embodiment shown in FIG. 3, as compared with the embodiment shown in FIG. 1 described above, a partition plate that partitions the inside of the package 10 as guiding means for guiding cooling air that has cooled the motor 60 to the exhaust duct 17 described above. 18 is provided. The other points are the same as those in the first embodiment described with reference to FIG.

  For example, as shown in FIG. 3, the partition plate 18 divides the interior of the package 10 into a compressor chamber 101 and a motor chamber 102, and the partition plate 18 is formed by being divided by the partition plate 18. The compressor main body 50 and the oil separation device 70 are accommodated in the compressor chamber 101, and the motor 60, the oil cooler 80, and the cooling fan 64 are accommodated in the motor chamber 102.

  In the illustrated embodiment, the aforementioned partition plate 18 is attached in the vertical direction in the figure near the boundary between the motor 60 and the compressor body 50, thereby dividing the inside of the package 10 into left and right in the figure, and The upper end is connected to the lower end edge of the exhaust duct 17.

  Therefore, the above-described cooling air inlet 13 provided on the side wall of the position where the propeller fan 64 provided in the motor 60 faces, and the cooling air outlet 16 formed in the top plate of the bonnet 12 above the motor 60. Are formed on the side wall and top plate of the bonnet 12 in the motor chamber 102 in which the motor 60 is accommodated, and the intake duct 14 that guides the outside air introduced from the cooling air inlet 13 to the outer periphery of the motor 60. The exhaust duct 17 for guiding the cooling air after cooling the motor 60 to the cooling air outlet 16 is disposed in the same chamber (the motor chamber 102).

  The partition plate 18 described above may completely divide the inside of the package 10 into two chambers. However, as described above, the partition plate 18 guides the cooling air after cooling the motor 60 to the exhaust duct 17. If it occurs, the inside of the package 10 may not be strictly divided into two chambers, and may be divided so that the motor chamber 102 and the compressor chamber 101 are partially communicated with each other. .

  In the package type compressor 1 configured as described above, the cooling air blown out between the inner periphery of the cylindrical portion 15 of the intake duct 14 and the outer periphery of the motor 60 is cooled on the outer periphery of the motor 60 while cooling the motor 60. Then, after being guided by the partition plate 18 disposed in front of the flow direction and guided toward the exhaust duct 17, after passing through the oil cooler 80, the cooling air is discharged to the outside through the outlet 16. Discharged.

  Thus, the cooling air after cooling the motor 60 is not introduced into the compressor chamber 101 in which the compressor body 50 and the oil separation device 70 are disposed, but is directly guided to the exhaust duct 17 side by the partition plate 18. The Therefore, by providing such a partition plate 18, the flow resistance of the cooling air can be reduced, and the power consumption of the cooling fan 64 can be reduced.

[Embodiment 3]
In the embodiment shown in FIG. 4, the intake air duct 14 and the exhaust duct 17 are further communicated with the embodiment described with reference to FIG. A series of ducts leading to the outlet 16 is formed, and the motor 60 is arranged in the series of ducts. Other configurations are the same as those in the first embodiment described with reference to FIG. .

  The communication between the intake duct 14 and the exhaust duct 17 may be configured such that an intermediate duct 19 that extends the lower end edge of the exhaust duct 17 downward is provided and the motor 60 is surrounded by the intermediate duct 19. Alternatively, a partition plate 18 similar to that of the embodiment described with reference to FIG. 3 is provided, and the motor chamber is located on the motor 60 side end edge of the cylindrical portion 15 of the intake duct 14 and partitions the motor chamber into the left and right in the drawing. The interior of the motor chamber 102 is further divided by a partition plate 18 ′ connected to the lower end edge of the exhaust duct 17, and a space formed between the two partition plates 18, 18 ′ is between the intake duct 14 and the exhaust duct 17. You may comprise the intermediate | middle duct 19 which connects these.

  By forming in this way, the cooling air introduced into the package 10 through the cooling air inlet 13 is a series of ducts formed by the intake duct 14, the exhaust duct 17, and the intermediate duct 19 that connects both the ducts. Since the cooling air inlet 13 leads to the cooling air outlet 16, the flow resistance of the cooling air can be further reduced, and the power consumption required for the rotation of the propeller fan 64 can be reduced. The motor 60 arranged in the duct formed in this way is reliably cooled by the cooling air passing through the duct.

  With the configuration of the present invention described above, the package type compressor of the present invention can be used in various fields using compressed gas, and is particularly suitable as a package type compressor used for compression of fuel gas. Can be adopted.

  Therefore, it is used to pressurize the fuel gas in various applications such as the supply of gas to an internal combustion engine using gas as fuel, the supply of gas to other gas equipment, and the pressurization of gas in the gas supply path to each household, etc. be able to.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing of the package type compressor concerning embodiment of this invention. Sectional drawing of a motor integrated compressor. The schematic explanatory drawing of the package type compressor concerning another embodiment of this invention. The schematic explanatory drawing of the package type compressor concerning another embodiment of this invention. Schematic explanatory drawing of the conventional package type compressor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Package type compressor 10 Package 101 Compressor chamber 102 Motor chamber 11 Frame 111 1st chamber 112 2nd chamber 12 Bonnet 13 Cooling air inlet 131 First air inlet 132 Second air inlet 14 Intake duct 15 Cylindrical part (intake Of duct 14)
15a Open edge (of the cylindrical part 15)
16 Cooling air outlet 161 Air outlet 17 Exhaust duct 18, 18 ', 181 Partition plate 182 Opening 19 Intermediate duct 50 Compressor body 501 Rotor (male)
502 Rotor (female)
501a, 502a Suction side rotor shaft 501b, 502b Discharge side rotor shaft 503 Cylinder 504 Rotor chamber 505 Suction port 507 Bearing 508 Suction side casing 511 Discharge side casing 60 Motor 61 Rotor 62 Stator 63 Motor casing 64 Propeller fan (fan)
65 Cooling fins 66 Double-suction multiblade fan 70 Oil separator 71 Receiver tank 72 Separator 73 Connection port 74 Inspection port 77 Flange 80 Oil cooler 81 After cooler 91 Discharge piping 92 Fuel gas suction piping

Claims (3)

In a package type compressor in which a compressor body, a motor, an oil separator and an oil cooler are housed in a package,
In the same room formed in the package, the motor, an intake duct for guiding the cooling air flowing in from the cooling air inlet provided in the package to the flow along the outer periphery of the motor, and the outer periphery of the motor An exhaust duct for guiding the cooling air guided along the oil cooler to the cooling air discharge port provided in the package after passing through the oil cooler;
A package type compressor, wherein a fan attached to a drive shaft of the motor and generating a flow of cooling air from the cooling air inlet to the cooling air outlet is disposed in the intake duct.   2. The package type compressor according to claim 1, further comprising guiding means for guiding the cooling air guided along the outer periphery of the motor to the exhaust duct. 2. The air intake duct and the exhaust duct communicate with each other to form a series of ducts from the cooling air inlet to the cooling air outlet, and the motor is arranged in the series of ducts. Package type compressor.

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