JP2007297981A - Reciprocating compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To arrange a cooling fin member according to a direction of cooling wind regardless of the direction of a cylinder head, and to utilize the cylinder head in common among two or more models. <P>SOLUTION: The cylinder head 12 is provided with two or more screw holes 18, 19. The cooling fin member 20 is provided with two or more radiating fins 20B extending in parallel, and attached to the screw holes 18, 19 of the cylinder head 12 with bolts 21. At this time, the cooling fin member 20 can be attached to an X direction in parallel with the suction port 13A of the cylinder head 12, and a Y direction and a Z direction which are perpendicular thereto. Thereby, the cooling fin member 20 is arranged along a cooling wind flow regardless of the direction of the cylinder head 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a reciprocating compressor suitably used for compressing a gas such as air by reciprocating a piston in a cylinder, for example.

  In general, a reciprocating compressor is known that reciprocates a piston connected to a crankshaft in a cylinder to suck air or the like into a compression chamber in the cylinder and discharge compressed gas (for example, Patent Document 1). In such a conventional reciprocating compressor, a cylinder head is attached to the tip side of a cylindrical cylinder, and for example, a suction port for supplying gas into the compression chamber and a compressed air are compressed in the cylinder head. A discharge port for discharging from the chamber is provided.

Japanese Patent Laying-Open No. 2005-214076

  At this time, the cylinder and the cylinder head are heated as the gas is compressed, resulting in a decrease in compression efficiency. For this reason, a plurality of cooling fins are provided in the cylinder head or the like, and a cooling fan is attached to the crankshaft, and cooling air is supplied to the cooling fins of the cylinder head or the like by the cooling fan.

  By the way, in the above-described prior art, the cylinder head is cast integrally with the cooling fin, and the cooling fin extends in a direction parallel to the crankshaft, for example, as a direction in which the cooling air flows. On the other hand, due to the layout of piping and the like, the cylinder head may be mounted with the direction rotated by 90 degrees, for example. In this case, since the cooling fins extend in a direction perpendicular to the crankshaft, the cooling air is supplied only to the cooling fins located on the upstream side among the plurality of cooling fins, and the cooling air is not supplied to the cooling fins on the downstream side. . As a result, there is a problem that the cooling efficiency of the cylinder head is lowered and the compression efficiency is lowered.

  Even when the cylinder head used in the V-type two-cylinder reciprocating compressor in Patent Document 1 is used in a horizontally opposed four-cylinder reciprocating compressor, due to a demand for downsizing of the compressor, etc. The direction of the cylinder head must be changed. For this reason, in a horizontally opposed four-cylinder reciprocating compressor, it is necessary to arrange cooling fins along a direction orthogonal to the crankshaft. As a result, when cooling air with a cooling fan attached to the crankshaft is supplied with a horizontally opposed reciprocating compressor, the cooling air flow direction differs from the direction in which the cooling fins extend, reducing the cooling effect of the cylinder head. End up.

  On the other hand, regardless of the direction of the cylinder head, in order to make the direction in which the cooling fins extend and the direction in which the cooling air flows, for example, two types of cylinder heads having different directions of the cooling fins may be manufactured. However, in this case, it is necessary to manufacture a plurality of types of cylinder heads, which increases the manufacturing cost.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to arrange a cooling fin member in accordance with the direction of the cooling air regardless of the direction of the cylinder head, and a plurality of models. Another object of the present invention is to provide a reciprocating compressor that can share a cylinder head.

  In order to solve the above-described problem, the invention of claim 1 is directed to a cylinder, a piston that is fitted in the cylinder and reciprocates by a crankshaft, and a compressed gas that is provided on the tip side of the cylinder and compressed by the piston. In a reciprocating compressor comprising a cylinder head having a discharge port for discharging and a cooling fan connected to the crankshaft and blowing cooling air toward the cylinder head, the cylinder head has a plurality of mounting directions. A cooling fin member that can be changed in direction is provided.

  According to a second aspect of the present invention, the cooling fin member includes a plurality of parallel radiation fins, and the radiation fins are attached to the cylinder head in a direction along the flow of the cooling air.

  In the invention of claim 3, a plurality of the cooling fin members are arranged along the flow of the cooling air, and each of the cooling fin members is detachably attached to the cylinder head.

  According to the first aspect of the present invention, since the cylinder head is provided with the cooling fin member whose mounting direction can be changed in a plurality of directions, the direction of the cooling fin member is set in the direction in which the cooling air flows regardless of the direction of the cylinder head. Can be installed together. For this reason, a cylinder head can be cooled efficiently using a cooling fin member. Further, a common cylinder head can be used for a plurality of models having different cylinder heads, and the manufacturing cost can be reduced.

  According to the invention of claim 2, since the cooling fin member includes a plurality of heat radiation fins parallel to each other, the cooling fin member is attached to the cylinder head in a state where these heat radiation fins follow the flow of the cooling air. Can do. Thereby, cooling air can be supplied to each radiation fin, and the cooling effect of the cooling fin member can be enhanced.

  According to the invention of claim 3, since the plurality of arranged cooling fin members are detachably attached to the cylinder head, for example, a relatively small number of cooling fin members are provided on the cylinder head on the low pressure side. A large number of cooling fin members can be provided on the cylinder head on the high pressure side, which is likely to become high temperature. Further, the size and material of the cooling fin member can be selected regardless of the cylinder head. Thereby, according to the heating state of a cylinder head, the number of cooling fin members, a size, a material, etc. can be selected suitably, and a cooling effect can be adjusted.

  Hereinafter, an air compressor will be described as an example of a reciprocating compressor according to an embodiment of the present invention and will be described in detail with reference to the accompanying drawings.

  First, FIG. 1 thru | or FIG. 7 has shown 1st Embodiment. In the figure, reference numeral 1 denotes a single-cylinder air compressor. The air compressor 1 is roughly constituted by a crankcase 2, a crankshaft 3, a cylinder 5, a piston 9, a cylinder head 12, and the like which will be described later.

  Reference numeral 2 denotes a crankcase formed in a substantially cylindrical shape, and a crankshaft 3 is accommodated in the crankcase 2.

  A crankshaft 3 is rotatably provided on the crankcase 2, and a pulley 4 is attached to one end side of the crankshaft 3. The crankshaft 3 is rotationally driven via a pulley 4 and the like by a motor (not shown) serving as a drive source.

  In addition, the pulley 4 is provided with a cooling fan 4A including an axial fan for supplying cooling air toward a cylinder 5 and a cylinder head 12 described later. For this reason, when the crankshaft 3 is rotated using the pulley 4, the cooling fan 4A is rotationally driven together with the crankshaft 3 and directed in the axial direction of the crankshaft 3 (left and right directions in FIG. 2). Cooling air is generated.

  Reference numeral 5 denotes a cylinder provided in the crankcase 2. The cylinder 5 is formed in a cylindrical shape, and a base end side is opened in the crankcase 2. Further, a valve plate member 6 having a suction port 6A and a discharge port 6B is provided on the tip side of the cylinder 5. Further, the valve plate member 6 is provided with a suction valve 7 and a discharge valve 8 for opening and closing the suction port 6A and the discharge port 6B, respectively.

  A piston 9 is slidably inserted into the cylinder 5. The piston 9 is connected to the crankshaft 3 via a connecting rod 10, and a piston ring 11 is attached to the outer periphery thereof. . The piston 9 defines a compression chamber S between the valve plate member 6 and the piston 9. The piston 9 reciprocates in the cylinder 5 as the crankshaft 3 rotates and compresses the air sucked into the compression chamber S.

  A cylinder head 12 is attached to the front end side of the cylinder 5, and the cylinder head 12 is formed in a substantially square box shape with an open back side, and the back side is closed by a valve plate member 6. In the cylinder head 12, a suction chamber 13 and a discharge chamber 14 are provided at positions corresponding to the suction port 6A and the discharge port 6B, respectively. The cylinder head 12 is provided with a suction port 13 </ b> A that opens to the suction chamber 13 and a discharge port 14 </ b> A that opens to the discharge chamber 14.

  Here, the suction port 13 </ b> A and the discharge port 14 </ b> A are provided so as to open on two side surfaces facing each other among the four side surfaces of the cylinder head 12. A suction silencer 15 for sucking outside air is attached to the suction port 13 </ b> A of the cylinder head 12. On the other hand, a discharge joint 16 for discharging compressed air to an external tank (not shown) or the like is connected to the discharge port 14 </ b> A of the cylinder head 12.

  The cylinder head 12 supplies the air sucked into the suction chamber 13 from the suction port 13A into the compression chamber S through the suction port 6A. The cylinder head 12 supplies the compressed air from the discharge port 14A to the external tank or the like through the discharge chamber 14 when the compressed air in the compression chamber S is discharged from the discharge port 6B.

  Further, as shown in FIG. 3 to FIG. 5, stepped portions 12A each having a bowl shape are formed at the four corners of the cylinder head 12, and bolt insertion holes 12B penetrate through the stepped portions 12A in the height direction. Is provided. And the cylinder head 12 is being fixed to the front end side of the cylinder 5 using the volt | bolt 17 penetrated by the bolt penetration hole 12B, as shown in FIG.

  At this time, the four bolt insertion holes 12B are arranged at positions corresponding to the corners of a substantially square. Thereby, the cylinder head 12 has a configuration in which the suction port 13A can be fixed in a total of four directions including two directions parallel to the crankshaft 3 and two directions orthogonal to each other. 1 and 2, the cylinder head 12 is mounted with the suction port 13 </ b> A and the discharge port 14 </ b> A in a direction parallel to the crankshaft 3 with the discharge port 14 </ b> A positioned on the pulley 4 side.

  Reference numeral 18 denotes a screw hole for fixing a cooling fin member 20 to be described later to the surface of the cylinder head 12. For example, 14 screw holes 18 are provided on the surface of the cylinder head 12 as shown in FIG. ing. The eight screw holes 18 are provided in three rows in the X direction parallel to the line connecting the suction port 13A and the discharge port 14A in the cylinder head 12, and one row in the Y direction orthogonal to the X direction. Six are arranged side by side. At this time, the screw holes 18 can attach a maximum of two cooling fin members 20 to one row on the center side among three rows parallel to the X direction, and one cooling fin member 20 to two rows on both sides. Can be installed. In addition, the screw holes 18 can attach a maximum of three cooling fin members 20 in the Y direction.

  Reference numeral 19 denotes a screw hole for fixing the cooling fin member 20 to the side surface of the cylinder head 12, and the screw hole 19 is formed on two side surfaces of the four side surfaces of the cylinder head 12 without the suction port 13 </ b> A and the discharge port 14 </ b> A, respectively. Is provided. Two screw holes 19 are provided along the X direction, and two screw holes 19 are provided along the height direction (Z direction) orthogonal to the X direction. Thereby, the screw hole 19 enables the cooling fin member 20 to be attached in two directions of the X direction and the Z direction.

  Reference numeral 20 denotes a cooling fin member for cooling the cylinder head 12. The cooling fin member 20 includes a base portion 20A formed in a substantially rectangular flat plate shape and the base as shown in FIGS. For example, six radiating fins 20 </ b> B are provided on the surface of the base portion 20 </ b> A and extending in parallel with each other. Further, as shown in FIG. 2, the base portion 20A is provided with, for example, two bolt insertion holes 20C located between the radiation fins 20B. The cooling fin member 20 is detachably fixed to the surface side of the cylinder head 12 by screwing the bolt 21 inserted into the bolt insertion hole 20 </ b> C into the screw hole 18. The cooling fin member 20 is detachably fixed to the side surface of the cylinder head 12 by screwing the bolt 21 into the screw hole 19.

  Here, the screw hole 18 is provided along two directions (X direction and Y direction) orthogonal to each other. Therefore, as shown in FIGS. 3 and 6, the cooling fin member 20 can be changed in the two directions of the X direction and the Y direction on the surface of the cylinder head 12. The screw holes 19 are also provided along two directions (X direction and Z direction) orthogonal to each other. For this reason, the cooling fin member 20 can be changed on two sides of the X direction and the Z direction on the side surface of the cylinder head 12.

  Further, a total of eight screw holes 18 are provided in the X direction on the surface of the cylinder head 12. For this reason, a maximum of four cooling fin members 20 can be arranged in the X direction. Further, a total of six screw holes 18 are provided in the Y direction on the surface of the cylinder head 12. For this reason, a maximum of three cooling fin members 20 can be arranged in the Y direction.

  In the air compressor 1 according to the present embodiment, for example, two cooling fin members 20 are attached at the center of the surface of the cylinder head 12. Further, the heat dissipating fins 20B of the cooling fin member 20 are arranged along the crankshaft 3 so as to coincide with the cooling air blowing direction.

  The air compressor according to the present embodiment has the above-described configuration, and the operation thereof will be described next.

  First, when the crankshaft 3 is rotationally driven using an electric motor or the like, the piston 9 connected to the crankshaft 3 reciprocates in the cylinder 5. In the suction stroke, the piston 9 is displaced from the top dead center toward the bottom dead center. Therefore, the suction valve 7 is separated from the valve plate member 6 by the negative pressure generated in the cylinder 5 and is opened. Air is sucked into the compression chamber S via the suction port 6A. On the other hand, in the discharge stroke, the piston 9 is displaced from the bottom dead center toward the top dead center, so that the air in the cylinder 5 is compressed and the pressure in the compression chamber S increases. As a result, the discharge valve 8 is separated from the valve plate member 6 by the pressure in the compression chamber S and opens, so that the compressed air in the compression chamber S passes through the discharge port 6B and is an air tank (not shown). It is discharged toward the etc.

  Further, since the cooling fan 4A is also rotationally driven together with the crankshaft 3, the cooling fan 4A supplies cooling air toward the cylinder 5 and the cylinder head 12. At this time, the cooling fin member 20 is attached to the surface of the cylinder head 12, and the plurality of radiating fins 20B of the cooling fin member 20 extend along the flow of the cooling air. For this reason, cooling air can be supplied to all the radiation fins 20 </ b> B, and the cylinder head 12 can be efficiently cooled using the cooling fin members 20.

  However, due to the layout of piping and the like, the cylinder head 12 may be mounted in a state where it is rotated by 90 degrees, for example. That is, as shown in FIG. 7, the specifications of the air compressor 1 may be changed from a state in which the suction port 13 </ b> A of the cylinder head 12 is parallel to the crankshaft 3 to a state orthogonal to the crankshaft 3.

  At this time, when the cooling fins 23 are formed integrally with the cylinder head 22 as in the comparative example shown in FIG. 8, for example, if the direction of the cylinder head 22 is changed, the direction of the cooling fins 23 is also changed. 23 is arranged in a direction different from the flow of the cooling air. At this time, the cooling air is supplied only to the cooling fins 23 located on the upstream side among the plurality of cooling fins 23, and the cooling air is not supplied to the cooling fins 23 on the downstream side. As a result, there is a problem that the cooling efficiency of the cylinder head 22 is lowered and the compression efficiency is lowered.

  In contrast, in the present embodiment, the cylinder head 12 and the cooling fin member 20 are formed separately, and the cooling fin member 20 can be attached to the cylinder head 12 in a plurality of directions (for example, two directions). . For this reason, even if the direction of the cylinder head 12 is changed, the cooling fin member 20 can be attached to the cylinder head 12 in a state in which the heat radiating fins 20B follow the flow of the cooling air. Can be cooled.

  Thus, in the present embodiment, the cylinder head 12 is provided with the cooling fin member 20 whose mounting direction can be changed in a plurality of directions. Therefore, regardless of the direction of the cylinder head 12, the direction of the cooling fin member 20 is controlled by the cooling air. Can be installed according to the direction of flow. For this reason, the cylinder head 12 can be efficiently cooled using the cooling fin member 20. Further, a common cylinder head 12 can be used for a plurality of models having different directions of the cylinder head 12, and the manufacturing cost can be reduced.

  Further, since the cooling fin member 20 includes a plurality of heat radiation fins 20B parallel to each other, the cooling fin member 20 can be attached to the cylinder head 12 in a state where these heat radiation fins 20B follow the flow of cooling air. . Thereby, cooling air can be supplied to each radiation fin 20B, and the cooling effect of the cooling fin member 20 can be improved.

  Further, since the plurality of cooling fin members 20 are detachably attached to the cylinder head 12, the number of the cooling fin members 20 can be adjusted according to the heating state of the cylinder head 12.

  That is, in FIG. 1 to FIG. 6, two cooling fin members 20 are attached to the cylinder head 12, but only one cooling fin member 20 may be attached when the cylinder head 12 is relatively low in temperature. Good. On the other hand, when the cylinder head 12 is heated to a high temperature, three or more cooling fin members 20 may be attached. At this time, as in the modification shown in FIG. 9, the cooling fin member 20 can be attached not only to the surface of the cylinder head 12 but also to the side surface of the cylinder head 12 using the screw holes 19. Thereby, according to the heating state of the cylinder head 12, the number of the cooling fin members 20 can be changed and the cooling effect can be adjusted.

  Further, since the cooling fan 4 </ b> A composed of an axial fan is connected to the crankshaft 3, the cooling fan 4 </ b> A supplies cooling air along the crankshaft 3. For this reason, by arrange | positioning the cooling fin member 20 along the crankshaft 3, it can supply to the whole cooling fin member 20, and the cooling effect of the cooling fin member 20 can be heightened.

  Next, FIGS. 10 to 12 show a second embodiment of the present invention. The feature of the present embodiment is that the cylinder on the high pressure side is compared with the cylinder head on the low pressure side when performing multistage compression with a plurality of cylinders. The configuration is such that a large number of cooling fin members are attached to the head. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  Reference numeral 31 denotes an air compressor according to the present embodiment. The air compressor 31 performs, for example, two-stage compression of three cylinders. The air compressor 31 includes a crankcase 32, cylinders 34 to 36, and the like.

  Here, the crankshaft 33 is rotatably accommodated in the crankcase 32, and the pulley 4 integrally formed with the cooling fan 4A is attached to the crankshaft 33. In addition, three cylinders 34 to 36 are provided around the crankcase 32 around the crankshaft 33. Further, the distal ends of the cylinders 34 to 36 are closed by the valve plate member 6, and a compression chamber is defined inside the cylinders 34 to 36.

  Further, pistons (not shown) are inserted into the cylinders 34 to 36, respectively. Each piston is connected to the crankshaft 33 and reciprocates in the cylinders 34 to 36 to compress the air sucked into the compression chamber.

  At this time, the cylinders 34 and 35 located on the left side and the center in FIG. 10 constitute a low-pressure side compression section in order to suck and compress the outside air. On the other hand, the cylinder 36 located on the right side in FIG. 10 constitutes a high-pressure side compression section in order to compress the compressed air discharged from the cylinders 34 and 35 again.

  Reference numeral 37 denotes a cylinder head attached to the front end side of the cylinders 34 to 36. As shown in FIGS. 10 to 12, the cylinder head 37 has a rear surface side substantially similar to the cylinder head 12 according to the first embodiment. It is formed in a substantially square box shape with an opening, and the back side is closed by a valve plate member 6. A suction chamber and a discharge chamber (both not shown) are provided inside the cylinder head 37, a suction port 38 is opened in the suction chamber, and a discharge port 39 is opened in the discharge chamber. .

  Here, the cylinder head 37 attached to the low-pressure side cylinders 34 and 35 is fixed to the cylinders 34 and 35 in a direction in which the suction port 38 is parallel to the crankshaft 33. The cylinder head 37 on the low pressure side is provided with a suction silencer 15 for sucking outside air at the suction port 38, and a connection for discharging compressed air toward the cylinder 36 on the high pressure side at the discharge port 39. A pipe 40 is connected.

  On the other hand, the cylinder head 37 attached to the high-pressure side cylinder 36 is fixed to the cylinder 36 in a direction in which the suction port 38 is orthogonal to the crankshaft 33. The high pressure side cylinder head 37 has a suction port 38 connected to a connection pipe 40, and a discharge joint 39 connected to the discharge port 39 for discharging compressed air toward an external tank or the like.

  Further, at the four corners of the cylinder head 37, bowl-shaped step portions 37A are respectively formed, and bolt insertion holes 37B are provided through the respective step portions 37A in the height direction. And the cylinder head 37 is being fixed to the front end side of the cylinders 34-36 using the volt | bolt 17 penetrated by the bolt penetration hole 37B.

  A plurality of (for example, 14) screw holes 42 are provided on the surface of the cylinder head 37, which are substantially the same as the screw holes 18 according to the first embodiment. As a result, a maximum of four cooling fin members 20 can be attached to the surface of the cylinder head 37 along the X direction parallel to the crankshaft 33, and a maximum of three in the Y direction orthogonal to the X direction. The cooling fin member 20 can be attached.

  Furthermore, a plurality of (for example, four) screw holes 43 substantially the same as the screw holes 19 according to the first embodiment are provided on the side surface of the cylinder head 37. Accordingly, one cooling fin member 20 can be attached to the side surface of the cylinder head 37, and the cooling fin member 20 can be arranged in two directions, that is, the X direction and the height direction (Z direction). It has become.

  As shown in FIG. 11, for example, two cooling fin members 20 are attached to the low pressure side cylinder head 37 so as to be positioned on the surface thereof. On the other hand, as shown in FIG. 12, a total of five cooling fin members 20, three on the surface and one on the two side surfaces, are attached to the high-pressure side cylinder head 37. As described above, the cylinder head 37 on the high pressure side, which is easily heated, is provided with a larger number of cooling fin members 20 than on the low pressure side. Thereby, the cooling effect of the cylinder head 37 on the high pressure side is enhanced as compared with the low pressure side.

  The cooling fin member 20 is attached along the direction parallel to the crankshaft 33 so that the cooling air is supplied to all the heat radiating fins 20B.

  Thus, also in this embodiment, it is possible to obtain substantially the same operational effects as those in the first embodiment. In particular, in the present embodiment, since a larger number of cooling fin members 20 are attached to the high-pressure side cylinder head 37 than the low-pressure side cylinder head 37, a large number of high-pressure side cylinder heads 37 that are likely to become high temperature are provided. The cooling fin member 20 can be used for reliable cooling. Accordingly, the cylinder head 37 on the high pressure side can be cooled by appropriately adjusting the number of the cooling fin members 20. Therefore, it is necessary to provide a dedicated cooling air guide or the like to cool the cylinder head 37 on the high pressure side. The manufacturing cost can be reduced.

  In each of the above embodiments, a single-cylinder or three-cylinder air compressor has been described as an example. However, the present invention can also be applied to a two-cylinder or four-cylinder or more air compressor. Furthermore, the arrangement of the cylinders can be applied to any arrangement such as a series type, a V type, or a horizontally opposed type.

  In each of the above embodiments, the cooling fan 4A is integrally formed on the pulley 4 attached to the crankshaft 3. However, the cooling fan is formed separately from the pulley, and the cooling fan is connected to the crankshaft. It is good also as a structure attached to.

  In each of the above embodiments, the cylinder heads 12 and 37 have the suction ports 13A and 38 and the discharge ports 14A and 39. However, the present invention is not limited to this. For example, when a piston is provided with a suction port and a suction valve and intake is performed from within the crankcase, the cylinder head may have only a discharge port.

  In each of the above embodiments, the cooling fin member 20 can be changed in two directions with respect to the cylinder heads 12 and 37, but the changeable direction may be three or more directions. In each of the above embodiments, the cooling fin member 20 can be selectively changed in two directions, but the direction can be changed continuously.

  Further, in each of the above embodiments, the cooling fin members 20 are all made of the same size and material. However, the present invention is not limited to this, and the case where the cylinder head is heated to a high temperature. May use a large-sized cooling fin member, or may use a cooling fin member made of a material having high thermal conductivity and easy to dissipate heat. As described above, the cooling effect may be adjusted by appropriately selecting the size and material of the cooling fin member according to the heating state of the cylinder head.

  Furthermore, in each said embodiment, although demonstrated taking the example of the air compressor, it is applicable also to the various reciprocating compressors which compress gas other than air.

It is a right view which shows the air compressor by the 1st Embodiment of this invention. FIG. 2 is a right side view showing the cylinder and cylinder head in FIG. 1 in a broken state. It is a perspective view which shows the cylinder head and cooling fin member in FIG. It is a perspective view which shows the cylinder head in FIG. 1 alone. FIG. 2 is an exploded perspective view showing a cylinder head and a cooling fin member in FIG. 1 in an exploded state. It is a perspective view which shows the state which attached the cooling fin member to the cylinder head in the direction different from FIG. It is explanatory drawing which shows the state which changes direction of the cylinder head by 1st Embodiment. It is explanatory drawing which shows the state which changes direction of the cylinder head by a comparative example. It is a perspective view which shows the cylinder head and cooling fin member by a modification. It is a front view which shows the air compressor by 2nd Embodiment. It is a perspective view which shows the cylinder head and cooling fin member of the low voltage | pressure side in FIG. It is a perspective view which shows the cylinder head and cooling fin member of the high voltage | pressure side in FIG.

Explanation of symbols

3 Crankshaft 4A Cooling fan 5 Cylinder 9 Piston 12, 37 Cylinder head 13A, 38 Suction port 14A, 39 Discharge port 18, 19, 42, 43 Screw hole 20 Cooling fin member 20A Base part 20B Radiation fin 21 Bolt

Claims (3)

A cylinder, a piston inserted into the cylinder and reciprocatingly driven by a crankshaft, a cylinder head provided on the tip side of the cylinder and having a discharge port for discharging compressed gas compressed by the piston, and the crankshaft In a reciprocating compressor comprising a cooling fan connected and connected to the cylinder head for blowing cooling air toward the cylinder head,
A reciprocating compressor characterized in that the cylinder head is provided with a cooling fin member whose mounting direction can be changed in a plurality of directions.   The reciprocating compressor according to claim 1, wherein the cooling fin member includes a plurality of parallel radiation fins, and the radiation fins are attached to the cylinder head in a direction along the flow of the cooling air. A plurality of the cooling fin members are arranged along the flow of the cooling air,
The reciprocating compressor according to claim 1, wherein each of the cooling fin members is configured to be detachably attached to the cylinder head.

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