Abstract:
Provided is a cooling device which provides cooling for a compressor including: a fan device; a housing which houses the fan device; a plurality of heat exchangers which are provided on sides of the housing; a fluid inlet part which intakes a fluid into the heat exchangers; and a fluid outlet part which discharges the fluid from the heat exchangers.

Description:
BACKGROUND 
       [0001]    1. Field 
         [0002]    Exemplary embodiments relate to a cooling device for a compressor. 
         [0003]    2. Description of the Related Art 
         [0004]    A compressor which compresses a fluid such as air, a gas, steam, or the like is used in various fields and has various types. 
         [0005]    In the related art, the compressor is classified into a volumetric compressor and a turbo type compressor. Specifically, the compressor may be classified into a reciprocating compressor, a rotary screw compressor, a turbo compressor, a diaphragm compressor, a rotary sliding vane compressor, etc. 
         [0006]    The compressor has a single stage but may have a plurality of compression stages according to design intent to constitute a multistage compression system. Using such multistage compression system, a greater compression ratio may be realized. 
         [0007]    In the related art, separate devices such as an inter cooler, an after cooler, etc. are used for the compressor to cool the fluids used in the compressor. The inter cooler, the after cooler, etc. are capable of lowering a temperature of a compressed fluid in a compression process and thus are widely used. 
       SUMMARY 
       [0008]    One or more exemplary embodiments provide a cooling device which provides cooling for a compressor and is installed as an independent module separated from the compressor. 
         [0009]    According to an aspect of an exemplary embodiment, there is provided a cooling device which provides cooling for a compressor including: a fan device; a housing which houses the fan device; a plurality of heat exchangers which are provided on sides of the housing; a fluid inlet part which intakes a fluid into the heat exchangers; and a fluid outlet part which discharges the fluid from the heat exchangers. 
         [0010]    The housing may include: a frame part at which the heat exchangers are provided; a fan device installer which is connected to the frame part and on which the fan device is disposed; and a cover which is provided on the frame part and includes an outlet. 
         [0011]    The cooling device may also include a rotary vane device which adjusts an air volume of the fluid passing through the heat exchangers. 
         [0012]    The fan device discharges the fluid toward a direction opposite to gravity. 
         [0013]    At least one of the heat exchangers may perform inter cooling of the compressor. 
         [0014]    The cooling device may also include a moisture separator which performs the inter cooling of the compressor. 
         [0015]    At least one of the heat exchangers may perform after cooling of the compressor. 
         [0016]    The cooling device may also include a moisture separator which performs the after cooling of the compressor. 
         [0017]    At least one of the heat exchangers may cool an oil which lubricates the compressor. 
         [0018]    The fluid inlet part and the fluid outlet part may be disposed on one of the sides of the housing. 
         [0019]    The compressor may be provided in an indoor space, and the cooling device may be provided in an outdoor space. 
         [0020]    The cooling device may be an independent module separated from the compressor. 
         [0021]    According to an aspect of another exemplary embodiment, there is provided a cooling device which provides cooling for a compressor and provided as an independent module separated from the compressor, including: a fan device; a housing which houses the fan device; a plurality of heat exchangers which are provided on sides of the housing; a fluid inlet part which intakes a fluid into the heat exchangers; and a fluid outlet part which discharges the fluid from the heat exchangers, wherein the plurality of heat exchangers includes: an inter cooling heat exchanger which performs inter cooling of the compressor; an after cooling heat exchanger which performs after cooling of the compressor; an oil cooling heat exchanger which performs cooling of an oil used for the compressor. 
         [0022]    The housing may include: a frame part at which the heat exchangers are provided; a fan device installer which is connected to the frame part and on which the fan device is disposed; and a cover which is provided on the frame part and comprises an outlet. 
         [0023]    The cooling device may also include a rotary vane device which adjusts an air volume of the fluid passing through the heat exchangers. 
         [0024]    The fan device discharges the fluid toward a direction opposite to gravity. 
         [0025]    The cooling device may further include a moisture separator which is provided in a duct connected to the inter cooling heat exchanger. 
         [0026]    The cooling device may further comprise a moisture separator which is provided in a duct connected to the after cooling heat exchanger. 
         [0027]    The fluid inlet part and the fluid outlet part may be disposed on one of the sides of the housing. 
         [0028]    The compressor may be provided in an indoor space, and the cooling device may be provided in an outdoor space. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0029]    The above and other aspects will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: 
           [0030]      FIG. 1  is a schematic view illustrating a cooling device and a compressor which are installed according to an exemplary embodiment; 
           [0031]      FIG. 2  is a front perspective view illustrating a front side of a cooling device for a compressor according to an exemplary embodiment; 
           [0032]      FIG. 3  is a perspective view illustrating the cooling device of  FIG. 2  from which a rotary vane device and a part of the rotary vane device is cut; 
           [0033]      FIG. 4  is a perspective view illustrating a back side of a cooling device for a compressor according to an exemplary embodiment; 
           [0034]      FIG. 5  is a perspective view illustrating the cooling device of  FIG. 4  from which a rotary vane device is removed and a part of the rotary vane device is cut; 
           [0035]      FIG. 6  is a plan view illustrating a cooling device which is used for a compressor and from which a cover is excluded, according to an exemplary embodiment; and 
           [0036]      FIG. 7  is a schematic view illustrating a cooling device and a compressor which are installed according to another exemplary embodiment. 
       
    
    
     DETAILED DESCRIPTION 
       [0037]    Hereinafter, one or more embodiments will be described in detail with reference to accompanying drawings. Also, in drawings, same reference numerals denote same elements to avoid repetition. 
         [0038]      FIG. 1  is a schematic view illustrating a cooling device  100  and a compressor  10  which are installed according to an exemplary embodiment.  FIG. 2  is a perspective view illustrating a front side of the cooling device  100 .  FIG. 3  is a perspective view illustrating the cooling device  100  of  FIG. 2  from which a rotary vane device  170  is removed and a part of the rotary vane device is cut.  FIG. 4  is a perspective view illustrating a back side of the cooling device  100 .  FIG. 5  is a perspective view illustrating the cooling device  100  of  FIG. 4  from which the rotary vane device  170  is removed and a part of the rotary vane device is cut.  FIG. 6  is a plan view illustrating the cooling device  100  from which a cover  123  is excluded. 
         [0039]    As shown in  FIG. 1 , the cooling device  100  according to the present exemplary embodiment provides cooling for the compressor  10  and is installed as an independent module separated from the compressor  10 . 
         [0040]    The compressor  10  according to the present exemplary embodiment is an air compressor which performs a three-stage compression and includes three turbo compressor devices  11 ,  12 , and  13  respectively appropriate for three stages. Here, the turbo compressor device  11  is a compressor device which performs a compression with a first stage pressure. The turbo compressor device  12  is a compressor device which performs a compression with a second stage pressure higher than the first stage pressure. The turbo compressor device  13  is a compressor device which performs a compression with a third stage pressure higher than the second stage pressure. A lubricating oil storage tank (not shown) for storing a lubricating oil used for the compressor  10  and a lubricating oil pump (not shown) for circulating the lubricating oil are installed inside the compressor  10 . 
         [0041]    The compressor  10  according to the exemplary embodiment is the air compressor which performs the three-stage compression and includes the three turbo compressor devices  11 ,  12 , and  13  but the exemplary embodiment is not limited thereto. The number of compression stages of a compressor according to the exemplary embodiment, a type of compressed fluid, and types of compressor devices of the compressor  10  are not particularly limited. For example, the number of compression stages of the compressor  10  according to the exemplary embodiment may be one (1), two (2), four (4), five (5), or the like. Also, the compressed fluid according to the exemplary embodiment may be another type of gas, steam, or the like and the compressed fluid may not be composed with air. The compressor devices of the compressor may be an axial compressor device, a mixed-flow compressor device, etc. 
         [0042]    As shown in  FIGS. 2 through 6 , the cooling device  100  includes a fan device  110 , a housing  120 , a heat exchanger  130 , a fluid inlet part  140 , a fluid outlet part  150 , a moisture separator  160 , and a rotary vane device  170 . 
         [0043]    The fan device  110  is installed in the housing  120  and includes a fan  111  and a fan driving motor  112  which rotates the fan  111 . 
         [0044]    The fan  111  is installed to allow an air flow generated by a rotation of the fan  111  to be discharged toward a direction opposite to gravity. Therefore, if the fan  111  rotates, an air flow generated in the housing  120  is discharged upwards to the external of the cooling device  100 . Cooling air flows into the housing  120  through the rotary vane device  170  and the heat exchanger  130  disposed on an outer surface of the housing  120  and as the fan  111  rotates, the cooling air entered through the rotary vane device  170  and the heat exchanger  130  is discharged upwards. 
         [0045]    The fan driving motor  112  rotates the fan  111  and may be any related art alternating current (AC) motor, a direct current (DC) motor, or the like. 
         [0046]    The housing  120  of the present exemplary embodiment has a hexagonal shape when seen from the outside and includes a frame part  121 , a fan device installer  122 , and a cover  123 . 
         [0047]    The housing  120  according to the present exemplary embodiment has the hexagonal shape when seen from the outside but is not limited thereto. A shape of the housing  120  according to the exemplary embodiment is not particularly limited. For example, the housing  120  may have various shapes, for example, a pillar shape, such as a cylindrical pillar shape, a pentagonal pillar shape, an octagonal pillar shape, or the like, or a polyhedron shape, such as an octahedron shape, a decahedron shape, or the like, etc. 
         [0048]    The frame part  121  operates as a framework of the housing  120 , and the heat exchanger  130  is installed on the frame part  121 . 
         [0049]    The fan device installer  122  is connected to the frame part  121 , and the fan driving motor  112  is installed on the fan device installer  122 . 
         [0050]    The cover  123  is installed on the frame part  121 . An outlet  123   a  which discharges an air flow through the fan device  110  is formed in the cover  123 , and a protecting net  123   b  which covers the outlet  123   a  is installed on the cover  123 . 
         [0051]    The heat exchanger  130  is installed on sides of the housing  120  and includes an inter cooling heat exchanger  131 , an after cooling heat exchanger  132 , and an oil cooling heat exchanger  133 . 
         [0052]    The inter cooling heat exchanger  131  may be installed on a side of the housing  120  and performs inter cooling of a fluid generated by the compressor  10 . 
         [0053]    The inter cooling heat exchanger  131  according to the present exemplary embodiment includes first and second inter cooling heat exchangers  131   a  and  131   b.  Since the compressor  10  according to the present exemplary embodiment performs the three-stage compression, and inter cooling is required between compression stages, two inter cooling heat exchangers  131   a  and  131   b  are installed. 
         [0054]    The inter cooling heat exchanger  131  according to the present exemplary embodiment comprises two heat exchangers but is not limited thereto. In the present exemplary embodiment, the compressor  10  performs the three-stage compression, and thus two inter cooling heat exchangers may be required. However, the number of compression stages of the compressor  10  according to the exemplary embodiment is not limited hereto, and thus the number of inter cooling heat exchangers varies according to the number of compression stages of the compressor  10 . For example, if the number of compression stages of the compressor  10  is four (4), three inter coolers may be required, and three inter cooling heat exchangers may be used. If the number of compression stages of the compressor  10  is five (5), four inter coolers may be required, and thus four inter cooling heat exchangers may be used. If the compressor  10  uses one-stage compression, an inter cooling heat exchanger may not be required. 
         [0055]    The first inter cooling heat exchanger  131   a  includes tubes  131   a _ 1  in which compressed air flows and radiation fins  131   a _ 2  which are installed at the tubes  131   a _ 1 . Here, the compressed air flowing into the tubes  131   a _ 1  is a fluid which was compressed with the first stage pressure by the turbo compressor device  11 . 
         [0056]    The second inter cooling heat exchanger  131   b  includes tubes  131   b _ 1  in which the compressed air flows and radiation fins  131   b _ 2  which are installed at the tubes  131   b _ 1 . Here, the compressed air flowing into the tubes  131   b _ 1  is the fluid which was compressed with the second stage pressure by the turbo compressor device  12 . 
         [0057]    The first and second inter cooling heat exchangers  131   a  and  131   b  according to the present exemplary embodiment are respectively disposed on different sides of the housing  120  but are not limited thereto. In other words, according to the design intent, the first and second inter cooling heat exchangers  131   a  and  131   b  may be disposed on one of the sides of the housing  120  together. 
         [0058]    The after cooling heat exchanger  132  is installed on another side of the housing  120  and performs after cooling of a fluid generated by the compressor  10 . 
         [0059]    The after cooling heat exchanger  132  includes tubes  132   a  in which the compressed air flows and radiation fins  132  which are installed at the tubes  132   a.  Here, the compressed air flowing into the tubes  132   a  is air which was compressed with the third stage pressure by the turbo compressor device  13 . 
         [0060]    The after cooling heat exchanger  132  is disposed on a side of the housing  120  different from the side of the housing  120  on which the inter cooling heat exchanger  131  is disposed and the side of the housing  120  on which the oil cooling heat exchanger  133  is disposed. However, the exemplary embodiment is not limited thereto. In other words, according to the design intent, the after cooling heat exchanger  132  may be disposed on the side of the housing  120  on which the inter cooling heat exchanger  131  is disposed or on the side of the housing  120  on which the oil cooling heat exchanger  133  is disposed. 
         [0061]    The cooling device  100  according to the present exemplary embodiment includes one after cooling heat exchanger  132  but is not limited thereto. In other words, the cooling device  100  according to the exemplary embodiment may include a plurality of after cooling heat exchangers  132 . 
         [0062]    The oil cooling heat exchanger  133  is installed on another side of the housing  120  and performs cooling of oil used as a lubricating oil of the compressor  10 . 
         [0063]    The oil cooling heat exchanger  133  includes tubes  133   a  in which the oil flows and radiation fins  133   b  which are installed at the tubes  133   a.  Here, the oil flowing into the tubes  133   a  is an oil which was stored in the lubricating oil storage tank, compressed by an oil pump (not shown). 
         [0064]    The oil cooling heat exchanger  133  according to the present exemplary embodiment is disposed on a side of the housing  120  different from the side of the housing on which the inter cooling heat exchanger  131  is disposed and the side of the housing  120  on which the after cooling heat exchanger  132  is disposed. However, the exemplary embodiment is not limited thereto. In other words, according to the intension of the designer, the oil cooling heat exchanger  133  may be disposed on the side of the housing  120  on which the inter cooling heat exchanger  131  is disposed or on the side of the housing  120  on which the after cooling heat exchanger  132  is disposed. 
         [0065]    The cooling device  100  according to the present exemplary embodiment includes one oil cooling heat exchanger  133  but is not limited thereto. In other words, the cooling device  100  according to the exemplary embodiment may include a plurality of oil cooling heat exchangers  133 . 
         [0066]    The fluid inlet part  140  allows the fluid to flowing into the heat exchanger  130 , and thus the fluid flowing out of the compressor  10  moves into the heat exchanger  130  through the fluid inlet part  140 . 
         [0067]    The fluid inlet part  140  of the present exemplary embodiment includes first, second, third, and fourth fluid inlets  141 ,  142 ,  143 , and  144 . 
         [0068]    The first fluid inlet  141  is a part through which the air compressed with the first stage pressure by the turbo compressor device  11  enters the cooling device  100 . The compressed air passing through the first fluid inlet  141  moves into the first inter cooling heat exchanger  131   a.    
         [0069]    The second fluid inlet  142  is a part through which the air compressed with the second stage pressure by the turbo compressor device  12  enters the cooling device  100 . The compressed air passing through the second fluid inlet  142  moves into the second inter cooling heat exchanger  131   b.    
         [0070]    The third fluid inlet  143  is a part through which the air compressed with the third stage pressure by the turbo compressor device  13  enters the cooling device  100 . The compressed air passing through the third fluid inlet  143  moves into the after cooling heat exchanger  132 . 
         [0071]    The fourth fluid inlet  144  is a part through which the oil stored in the lubricating oil storage tank enters the cooling device  100 . The oil passing through the fourth fluid inlet  144  moves into the oil cooling heat exchanger  133 . 
         [0072]    The fluid outlet part  150  discharges the fluid from the heat exchanger  130 . The fluid cooled by the heat exchanger  130  returns into the compressor  10  through the fluid outlet part  150  or move into a next stage device. In other words, the fluid discharged from the inter cooling heat exchanger  131  and the oil cooling heat exchanger  133  of the heat exchanger  130  returns to the compressor  10 , while the fluid discharged from the after cooling heat exchanger  132  may return to the compressor  10  or may move to a next stage device (e.g., a combustor or the like). 
         [0073]    The fluid outlet part  150  of the present exemplary embodiment includes first, second, third, and fourth fluid outlets  151 ,  152 ,  153 , and  154 . 
         [0074]    The first fluid outlet  151  is a part through which the compressed air discharged from the first inter cooling heat exchanger  131   a  and passing through a first moisture separator  161  passes and exits the cooling device  100 . The compressed air passing through the first fluid outlet  151  moves into the turbo compressor device  12  through the connection ducts D. 
         [0075]    The second fluid outlet  152  is a part through which the compressed air discharged from the second inter cooling heat exchanger  131   b  and passing through a second moisture separator  162  passes and exits the cooling device  100 . The compressed air passing through the second fluid outlet  152  moves into the turbo compressor device  13  through the connection ducts D. 
         [0076]    The third fluid outlet  153  is a part through which the compressed air discharged from the after cooling heat exchanger  132  and passing through a third moisture separator  163  passes and exits the cooling device  100 . The compressed air passing through the third fluid outlet  153  may return to the compressor  10  through the connection ducts D or move to a next stage device (e.g., a combustor or the like). 
         [0077]    The fourth fluid outlet  154  is a part through which the oil discharged from the oil cooling heat exchanger  133  passes and exits the cooling device  100 . The oil passing through the fourth fluid outlet  154  moves into the lubricating oil storage tank of the compressor  10  through the connection ducts D. 
         [0078]    The fluid inlet part  140  and the fluid outlet part  150  according to the present exemplary embodiment are formed on one of the sides of the housing  120  together. In other words, this arrangement structure simplifies a layout of connection ducts connecting the cooling device  100  to the compressor  10  and provides easy installation and disassembly of the devices. 
         [0079]    The fluid inlet part  140  and the fluid outlet part  150  according to the present exemplary embodiment are formed on one of the sides of the housing  120  but are not limited thereto. In other words, according to a design of the designer, the fluid inlet part  14  and the fluid outlet part  150  may be respectively disposed on different sides of the housing  120 . 
         [0080]    The moisture separator  160  is installed on an internal duct, which the inter cooling heat exchanger  131  or the after cooling heat exchanger  132  are connected to, to separate moisture of the fluid. 
         [0081]    Any related art moisture separator may be used as the moisture separator  160 , and thus a structure and a function of the moisture separator  160  will be omitted herein. 
         [0082]    The moisture separator  160  of the exemplary embodiment includes the first, second, and third moisture separators  161 ,  162 , and  163 . 
         [0083]    The first moisture separator  161  is disposed in an internal duct between the first inter cooling heat exchanger  131   a  and the first fluid outlet  151  to separate moisture of the compressed air. 
         [0084]    The second moisture separator  162  is disposed in an internal duct between the second inter cooling heat exchanger  131   b  and the second fluid outlet  152  to separate moisture of the compressed air. 
         [0085]    The third moisture separator  163  is disposed in an internal duct between the after cooling heat exchanger  132  and the third fluid outlet  153  to separate moisture of the compressed air. 
         [0086]    According to the present exemplary embodiment, the moisture separator  160  is installed in ducts connected to outlets of the heat exchanger  130  to allow the compressed air to pass through the heat exchanger  130  and then through the moisture separator  160 . 
         [0087]    The rotary vane device  170  is installed on a side of the housing  120  to adjust an air volume of air passing through the heat exchanger  130 . 
         [0088]    The rotary vane device  170  of the exemplary embodiment is installed at the frame part  121  to cover the heat exchanger  130 . The rotary vane device  170  is disposed so that a plurality of vanes  171  forms rows. The plurality of vanes  171  are installed to rotate like an open-close type louver. 
         [0089]    Angles of the vanes  171  may be manually adjusted by a user. If the user applies a force to rotate the vanes  171 , the angles of the vanes  171  may be changed to adjust an air volume of air passing through the heat exchanger  130 . 
         [0090]    The rotary vane device  170  according to the present exemplary embodiment may be a manual type to allow the user to apply the force to the vanes  171  in order to adjust the angles of the vanes  171 , but the exemplary embodiment is not limited thereto. In other words, the rotary vane device  170  according to the exemplary embodiment additionally may include a driving motor and a control circuit to be constituted as an automatic type which adjusts the angles of the vanes  171  through the driving motor. 
         [0091]    The cooling device  100  according to the present exemplary embodiment includes the rotary vane device  170  but is not limited thereto. In other words, the cooling device  100  according to the exemplary embodiment may not include the rotary vane device  170 . 
         [0092]    An installation and an operation of the cooling device  100  according to the present exemplary embodiment will now be described. 
         [0093]    The installation of the cooling device  100  will be first described. 
         [0094]    As shown in  FIG. 1 , an installer may separately install the compressor  10  and the cooling device  100  in a predetermined indoor installation space. The cooling device  100  is the independent module which is separated from the compressor  10 . Therefore, the connection ducts D are installed between the compressor  10  and the cooling device  100  to allow the fluid to move between the compressor  10  and the cooling device  100 . Because the cooling device  100  is installed in the indoor space in the present exemplary embodiment, it may be desirable that a duct(not shown) be connected to the outlet  123   a  of the cover  123  to discharge heated air to the outside. 
         [0095]    As shown in  FIG. 7 , the installer may also install the compressor  10  in an indoor space and install the cooling device  100  in an outdoor space. In this case, the required indoor installation space is reduced, and a cooling performance of the cooling device  100  is improved. 
         [0096]    The operation of the cooling device  100  according to the present exemplary embodiment will now be described. 
         [0097]    If an operator operates the compressor  10 , the turbo compressor devices  11 ,  12 , and  13  of the compressor  10  operate. 
         [0098]    The turbo compressor device  11  compresses incoming air to the first stage pressure and discharges compressed air. The discharged compressed air moves into the first inter cooling heat exchanger  131   a  through the first fluid inlet  141  to exchange heat. Here, the heat exchange in the first inter cooling heat exchanger  131   a  is performed as follows. Cooling air from the outside flows into the housing  120  through the rotary vane device  170  and the first heat exchanger  131   a  and as the fan  111  rotates, the cooling air entered through the rotary vane device  170  and the first heat exchanger  131   a  is discharged upwards and exits the cooling device  100 . That is, the cooling air from the outdoor passes through the rotary vane device  170  and the first inter cooling heat exchanger  131   a  to exchange heat. The air heated through the heat exchange is discharged from an inside of the housing  120  upwards through the outlet  123   a.    
         [0099]    Compressed air cooled by the first inter cooling heat exchanger  131   a  moves into the first moisture separator  161  so as to separate moisture therefrom. The air from which moisture has been separated passes through the first fluid outlet  151  and then moves into the turbo compressor device  12  through the connection ducts D. 
         [0100]    The air flowing into the turbo compressor device  12  is compressed to the second stage pressure by the turbo compressor device  12 . The compressed air discharged from the turbo compressor device  12  passes through the second fluid inlet  142  and then moves into the second inter cooling heat exchanger  131   b  to exchange heat. Here, the heat exchange in the second cooling heat exchanger  131   b  is performed as follows. Cooling air from the outside flows into the housing  120  through the rotary vane device  170  and the second heat exchanger  131   b  and as the fan  111  rotates, the cooling air entered through the rotary vane device  170  and the second heat exchanger  131   b  is discharged upwards and exits the cooling device  100 . That is, the cooling air from the outdoor passes through the rotary vane device  170  and the second inter cooling heat exchanger  131   b  so as to exchange heat. The air heated through the heat exchange is discharged from the inside of the housing  120  upwards through the outlet  123   a.    
         [0101]    The compressed air cooled by the second inter cooling heat exchanger  131   b  moves into the second moisture separator  162  so as to separate moisture therefrom. The air from which the moisture has been separated passes through the second fluid outlet  152  and then moves into the turbo compressor device  13  through the connection ducts D. 
         [0102]    The air flowing into the turbo compressor device  13  is compressed to the third stage pressure by the turbo compressor device  13 . The compressed air discharged from the turbo compressor device  13  passes through the third fluid inlet  143  and then moves into the after cooling heat exchanger  132  so as to exchange heat. Here, the heat exchange in the after cooling heat exchanger  132  is performed as follows. Cooling air from the outside flows into the housing  120  through the rotary vane device  170  and the after cooling heat exchanger  132  and as the fan  111  rotates, the cooling air entered through the rotary vane device  170  and the after cooling heat exchanger  132  is discharged upwards and exits the cooling device  100  That is, the cooling air from the outdoor passes through the rotary vane device  170  and the after cooling heat exchanger  132  to exchange heat. The air heated through the heat exchange is discharged from the inside of the housing  120  upwards through the outlet  123   a.    
         [0103]    The compressed air cooled by the after cooling heat exchanger  132  moves into the third moisture separator  163  so as to separate moisture therefrom. The air from which the moisture has been separated passes through the third fluid outlet  153  and then returns to the compressor  10  through the connection ducts D or moves to a next stage device (e.g., a combustor or the like). 
         [0104]    The lubricating oil circulates in the compressor  10 , and the circulating lubricating oil lubricates a rotor structure, etc. of the compressor  10 . For the circulation of the lubricating oil, the lubricating oil storage tank and the lubricating oil pump are installed in the compressor  10 . The lubricating oil stored in the lubricating oil storage tank passes through the fourth fluid inlet  144  and then moves into the oil cooling heat exchanger  133  through an operation of the lubricating oil pump so as to exchange heat. Here, the heat exchange in the oil cooling heat exchanger  133  is performed as follows. Cooling air from the outside flows into the housing  120  through the rotary vane device  170  and the oil cooling heat exchanger  133  and as the fan  111  rotates, the cooling air entered through the rotary vane device  170  and the oil cooling heat exchanger  133  is discharged upwards and exits the cooling device  100 . That is, the cooling air from the outdoor air passes through the rotary vane device  170  and the oil cooling heat exchanger  133  so as to exchange heat. The air heated through the heat exchange is discharged from the inside of the housing  120  upwards through the air flow. 
         [0105]    The oil cooled by the oil cooling heat exchange passes through the fourth fluid outlet  154  and then returns to the lubricating oil storage tank of the compressor  10  through the connection ducts D. 
         [0106]    Before or when the cooling device  100  operates, the operator may adjust the angles of the vanes  171  of the rotary vane device  170  to adjust an air volume of air passing through the heat exchanger  130  in order to adjust a cooling operation of the cooling device  100 . 
         [0107]    As described above, the cooling device  100  according to the present exemplary embodiment is installed as the independent module separated from the compressor  10 . Therefore, a structure of the compressor  10  is simplified, and a volume of the compressor  10  may be reduced. As a result, a limit to an installation space of the compressor  10  may also be reduced, and the compressor  10  is easily installed, maintained, and repaired. 
         [0108]    Also, the inter cooling heat exchanger  131 , the after cooling heat exchanger  132 , the oil cooling heat exchanger  133 , and the moisture separator  160  are disposed together in one cooling device  100 . Therefore, due to a unified module structure of cooling devices, the cooling device  100  according to the present exemplary embodiment is easily installed, maintained, and repaired, and an installation space of the cooling device  100  is reduced, and thus a space utilization is increased. 
         [0109]    In addition, a plurality of heat exchangers  130  are disposed together in the cooling device  100 , and cooling operations of the heat exchangers  130  are simultaneously performed through the one fan device  100 . Therefore, the number of used motors is reduced, and energy is saved in the cooling operations. 
         [0110]    Since the cooling device  100  includes the moisture separator  160 , additional duct equipment is not required to install a moisture separator in the compressor  10 . Therefore, the installation space of the compressor  10  is reduced, and a space utilization of a whole system including the compressor  10  and the cooling device  100  is increased. 
         [0111]    Since the cooling device  100  includes the rotary vane device  170 , the operator adjusts the angles of the vanes  171  of the rotary vane device  170  to easily adjust the cooling operation of the cooling device  100 . 
         [0112]    While exemplary embodiments have been particularly shown and described above, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the inventive concept as defined by the following claims.