JP2007154663A - Air compression device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance durability by installing a moisture removal means on the suction side of a compressor to protect the parts in the compressor from the rusting and degrading by moisture. <P>SOLUTION: The compressor 3, a motor 8, and a storage tank 22 are installed in a soundproof box 1. A suction pipe 10 is connected to the suction side of the compressor 3, and a discharge pipe 21 is connected to the discharge side of the compressor 3. A suction side drier 11, a suction tank 18, and a filter 19 are installed on the suction side of the compressor 3. While the air compression device is operated, the suction air is dehumidified by the suction side drier 11 to flow the dry suction air into the compressor 3. Consequently, the compression device in which the parts in the compressor 3 are prevented from being rusted and degraded by the moisture of the suction air and which can be easily handled can be provided even under humid use environments. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air compressor that is suitably used as a supply source of compressed air, for example.

  In general, an air compression apparatus sucks and compresses external air into a compression chamber and discharges the compressed air toward a tank or the like (see, for example, Patent Document 1).

JP 2004-300955 A

  As this type of conventional air compressor, a reciprocating or scroll compressor is known. Here, the reciprocating compression device performs an air suction stroke and a discharge stroke alternately by opening and closing the suction valve and the discharge valve, respectively, when the piston reciprocates in the cylinder. is there.

  In addition, the scroll-type compression device has two scrolls each provided with a spiral wrap portion, and these scrolls relatively rotate in a state where the wrap portions are overlapped with each other. The suction, compression and discharge operations are continuously performed.

  On the other hand, as an air compression device, an oil-type compression device is known in which lubricating oil is accommodated in advance in a casing or the like, and a movable part is lubricated by the lubricating oil. There is also known an oil-free compression device that eliminates the need to store lubricating oil in a casing by using, for example, a lubricating oil-filled bearing.

  These air compressors suck in the outside air and discharge the compressed air, and the compressed air is supplied toward an external pneumatic device or the like. In this case, since the compressed air is compressed and becomes hot and humid, in the prior art, a dryer is provided on the discharge side of the compression device so as to lower the temperature and humidity of the compressed air.

  By the way, the above-described conventional air compressor is widely used as an air pressure source at various work sites, and may be used in an environment with high humidity, for example. However, when the compression device is operated in such a humid environment, air containing more moisture than usual is sucked into the compression device, and various metals disposed in the compression device. Parts, lubricating oil, etc. easily come into contact with moisture in the air.

  For this reason, in a prior art, when a compression apparatus is used in a humid environment, there is a problem in that internal parts are rusted and parts need to be repaired or replaced, and compression performance and durability are reduced.

  In particular, in a reciprocating compression device, a suction valve or a discharge valve made of a metal plate or the like is likely to rust due to moisture, and if these components rust, there is a risk of causing malfunction such as air leakage. Further, in the oil-type compression device, the lubricating oil may be deteriorated due to the mixing of moisture, and if the lubricating performance is lowered due to this, malfunction of the movable part or galling is likely to occur.

  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 suppress deterioration of parts even when used in a humid environment, and to improve compression performance and durability. The object is to provide an air compressor.

  In order to solve the above-described problem, the invention of claim 1 is a compressor that sucks in air and compresses it to discharge compressed air, and is provided on the suction side of the compressor and when air is sucked into the compressor. The structure which consists of a water | moisture-content removal means to remove the water | moisture content contained in this suction air is employ | adopted.

  According to the invention of claim 2, the moisture removing means is constituted by a suction-side dryer that cools the suction air with a refrigerant and dehumidifies the suction air.

  According to the invention of claim 3, the discharge side of the compressor is provided with a discharge side dryer that cools the compressed air with a refrigerant and dehumidifies the compressed air.

  According to a fourth aspect of the present invention, the moisture removing means includes a suction side dryer that cools the suction air with a refrigerant and dehumidifies the suction air, and a discharge side that cools the compressed air with a refrigerant and dehumidifies the compressed air. It is configured as a shared dryer that shares the dryer.

  Further, according to the invention of claim 5, a suction tank through which the suction air flows is provided between the moisture removing means and the compressor.

  According to the first aspect of the present invention, the moisture contained in the intake air can be removed by the moisture removing means during the operation of the air compression device, and the intake air having a low humidity is allowed to flow stably into the compressor. be able to. As a result, for example, parts such as valve bodies, bearings, seals, and lubricating oils arranged inside the compressor can be reliably protected from rusting and deterioration due to moisture, and the life of these parts can be extended. it can. Therefore, the air compressor can be stably operated over a long period of time even in a humid environment, and a highly adaptable compressor can be realized in various environments, and its compression performance, durability, and reliability can be realized. Can be improved.

  Further, according to the invention of claim 2, the suction side dryer can be constituted by a refrigeration dryer or the like, for example. And the suction side dryer can condense and remove the moisture contained in the air while cooling the suction air with the refrigerant, and can efficiently dry the suction air flowing into the compressor.

  Further, by using the suction side dryer, the temperature of the compressed air can be lowered by the amount that the suction air is first cooled (precooled). For this reason, the components of the compressor can be protected from deterioration due to high temperatures, and the heat resistance can be improved. In addition, since the compressor can sufficiently suck in low-temperature intake air that suppresses thermal expansion, the compression efficiency can be increased, and high performance (high pressure) of the compressor can be realized. .

  According to the invention of claim 3, the compressed air can be dehumidified by the discharge side dryer, and for example, the compressed air having a low humidity can be stably supplied to an external pneumatic device or the like. Therefore, not only the compressor but also external devices connected thereto can be prevented from rusting, deterioration, etc., and an air compressor that can be easily handled as an air pressure source can be realized.

  According to the invention of claim 4, since the suction-side dryer and the discharge-side dryer can be shared by the shared dryer, it is necessary to separately arrange these two dryers in the air compressor. Thus, the number of parts related to the dryer, the arrangement space of the parts, and the like can be reduced. Therefore, even a compression device having a dryer function on both the suction side and the discharge side can be formed compactly, and the assembly operation of the compression device can be performed efficiently.

  Moreover, for example, in the case of an air compressor in which the discharge side dryer is mounted in advance, a part of the piping through which the intake air flows can be extended to the position of the existing discharge side dryer and connected to the dryer. A suction-side dryer can also be formed. For this reason, a shared dryer can be easily realized by using an existing discharge-side dryer, and an increase in cost can be suppressed.

  Further, according to the fifth aspect of the present invention, for example, when the suction air flows from the moisture removing means toward the compressor, the suction tank can be interposed in the middle of the flow path. As a result, the suction tank can remove moisture contained in the suction air at a low temperature by dew condensation on the inner wall of the tank, and efficiently dry the suction air in cooperation with the moisture removing means. Can do.

  Further, for example, even if pulsation occurs in the pressure of the suction air inside a pipe or the like connecting the moisture removing means and the compressor, this pulsation can be absorbed by the suction tank. Can be relaxed. For this reason, components, such as a valve body arrange | positioned inside the compressor, can be protected from an excessive pressure fluctuation | variation, for example, damage to components can be prevented and durability can be improved.

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

  Here, FIG. 1 and FIG. 2 show a first embodiment, and in this embodiment, a package type reciprocating compression device will be described as an example of an air compression device.

  In the figure, reference numeral 1 denotes a soundproof box constituting the outer shell of the air compressor. The soundproof box 1 is formed as a substantially rectangular parallelepiped box surrounded by, for example, a plurality of steel plates, and has a rectangular frame shape inside. A pedestal 2 is provided.

  The pedestal 2 is provided with a compressor 3, a motor 8, a storage tank 22, and the like, which will be described later. Contained. In addition, an intake opening 1 </ b> A is provided on the peripheral wall of the soundproof box 1.

  Reference numeral 3 denotes a compressor provided on a pedestal 2 in the soundproof box 1. The compressor 3 is composed of, for example, a two-cylinder / two-stage reciprocating compressor, and a crankcase 4 mounted on the pedestal 2. And a crankshaft 5 rotatably provided in the crankcase 4 and a low pressure cylinder 6 and a high pressure cylinder 7 described later.

  Reference numeral 6 denotes a low-pressure cylinder provided on the crankcase 4. The low-pressure cylinder 6 is fitted into a cylinder 6A and the cylinder 6A so as to be able to reciprocate, and is connected to the crankshaft 5 via a connecting rod or the like. Piston 6B, cylinder head 6C mounted on cylinder 6A, suction port 6D and discharge port 6E provided in the cylinder head 6C, and suction valve and discharge provided in the low pressure cylinder 6 so as to be openable and closable And a valve (both not shown).

  The low pressure cylinder 6 repeats the suction stroke and the discharge stroke alternately by reciprocating the piston 6B in the cylinder 6A. In this case, in the suction stroke, air is sucked into the cylinder 6A from the suction port 6D by opening the suction valve and closing the discharge valve, and this suction air is compressed in the cylinder 6A and compressed air Become. In the discharge stroke, the suction valve is closed and the discharge valve is opened, so that the compressed air in the cylinder 6A is discharged from the discharge port 6E.

  Reference numeral 7 denotes a high-pressure cylinder provided on the crankcase 4 along with the low-pressure cylinder 6. The high-pressure cylinder 7 is similar to the low-pressure cylinder 6 and includes a cylinder 7A, a piston 7B, a cylinder block 7C, a suction port 7D, and a discharge port. 7E etc.

  In these cylinders 6 and 7, the suction port 6 </ b> D of the low pressure cylinder 6 is connected to the suction port 9 via a suction pipe 10, a suction side dryer 11, a suction tank 18, a filter 19 and the like which will be described later. Further, the discharge port 6E of the low pressure cylinder 6 is connected to the suction port 7D of the high pressure cylinder 7 via the intermediate pipe 20. Further, the discharge port 7E of the high-pressure cylinder 7 is connected to an air supply port 23 via a discharge pipe 21, a storage tank 22 and the like which will be described later.

  Then, the compressor 3 compresses the air sucked by the first-stage low-pressure cylinder 6 to an intermediate pressure, and further compresses the compressed air at the intermediate pressure by the second-stage high-pressure cylinder 7, so that the discharge port 7E High pressure compressed air is discharged toward the storage tank 22.

  Reference numeral 8 denotes an electric motor that constitutes a drive source of the compressor 3, and the motor 8 is provided on the base 2 below the compressor 3 and is connected to the crankshaft 5 via a pulley, a belt, and the like. Has been. The motor 8 operates the compressor 3 by rotationally driving the crankshaft 5.

  Reference numeral 9 denotes a suction port provided in the vicinity of the opening 1A of the soundproof box 1, and the suction port 9 sucks outside air from the outside of the soundproof box 1 through the opening 1A. In this case, the suction port 9 is provided with, for example, a filter having a dustproof / soundproof function.

  Reference numeral 10 denotes a suction pipe provided on the suction side of the compressor 3. The suction pipe 10 sucks air into a suction port 6D of the low-pressure cylinder 6, and a suction port 9 is provided at one end side (upstream side) thereof. Is provided. The other end side (downstream side) of the suction pipe 10 is connected to the suction port 6 </ b> D of the low pressure cylinder 6.

  Further, as shown in FIGS. 1 and 2, a suction-side dryer 11, a suction tank 18 and a filter 19, which will be described later, are provided in the middle of the suction pipe 10. And the outside air (suction air) sucked from the suction port 9 sequentially passes through the suction side dryer 11, the suction tank 18 and the filter 19 by flowing through the suction pipe 10, and then to the suction port 6 </ b> D of the low pressure cylinder 6. Sucked.

  Reference numeral 11 denotes a suction-side dryer as a moisture removing means provided on the suction side of the compressor 3. The suction-side dryer 11 cools the suction air with the refrigerant C when air is sucked into the suction port 6D of the low-pressure cylinder 6, thereby dehumidifying the suction air. And the suction side dryer 11 consists of refrigeration dryers etc., for example, and is comprised by the below-mentioned refrigerant | coolant compressor 12, the condenser 13, the receiver tank 14, the expansion valve 15, the heat exchanger 16, the refrigerant | coolant piping 17, etc. .

  Reference numeral 12 denotes a refrigerant compressor composed of, for example, an electric compressor. The refrigerant compressor 12 compresses the refrigerant C vaporized in the heat exchanger 16 as will be described later, and condenses the refrigerant C that has become high-pressure gas. In this case, the liquid is discharged toward the nozzle 13.

  Reference numeral 13 denotes a condenser connected to the discharge side of the refrigerant compressor 12. The condenser 13 includes, for example, a zigzag refrigerant pipe line (not shown) connected in the middle of the refrigerant pipe 17, and a refrigerant compressor. 12 has an electric fan 13A for cooling the refrigerant C flowing into the refrigerant pipe from 12. And the refrigerant | coolant C cooled by the condenser 13 is stored in the receiver tank 14 provided in the middle of the refrigerant | coolant piping 17, and is decompressed by the expansion valve 15 after that, and is heat-exchanged in the liquefied state. Circulate towards

  16 is a heat exchanger connected to the outflow side of the condenser 13, and the heat exchanger 16 is located in the middle of the suction pipe 10, and is located in the vicinity of the air passage 16 A, for example, zigzag It has a refrigerant passage 16 </ b> B (the shape is simplified in FIG. 1) that is formed in a bent shape and connected in the middle of the refrigerant pipe 17.

  Then, when the liquefied refrigerant C flows into the refrigerant passage 16B from the expansion valve 15 side, the heat exchanger 16 evaporates the refrigerant C in the vicinity of the air passage 16A, thereby sucking air flowing through the air passage 16A. Cool down. For this reason, moisture contained in the intake air is condensed on the peripheral wall of the air passage 16 </ b> A, and the water droplets are discharged to the outside through a drain passage (not shown) provided in the heat exchanger 16.

  Thus, the suction side dryer 11 removes the water | moisture content contained in suction air, and dries suction air. Further, the refrigerant C vaporized in the refrigerant passage 16 </ b> B is returned to the refrigerant compressor 12 through the refrigerant pipe 17. In this case, the refrigerant pipe 17 connects the refrigerant compressor 12, the condenser 13, the receiver tank 14, the expansion valve 15 and the heat exchanger 16 in an annular shape, and circulates the refrigerant C between them.

  Next, 18 denotes a suction tank provided between the suction side dryer 11 and the compressor 3, and the suction tank 18 is connected to the downstream side of the suction side dryer 11, and the suction air cooled by the dryer 11. Is in circulation. Then, the suction tank 18 condenses moisture contained in the suction air that has become low sound on the inner wall of the tank 18, thereby further drying the suction air. For this reason, the suction tank 18 is provided with a drain discharge port 18 </ b> A for discharging condensed water droplets to the outside.

  Further, a heat insulating material 18B is provided outside the suction tank 18, and when the temperature of the air in the soundproof box 1 is increased by operating the air compression device, the heat is absorbed by the suction tank 18. It suppresses the conduction to. Thereby, it is possible to prevent the intake air from warming in the suction tank 18.

  Further, during the operation of the compressor 3, when the suction stroke is periodically repeated, a pulsation occurs in the pressure of the intake air, and when this pulsation becomes a resonance state in the suction pipe 10, a suction valve or a discharge in the compressor 3 is discharged. The valve may be damaged by large pressure fluctuations. For this reason, the suction tank 18 is interposed in the middle of the suction pipe 10 with an appropriate volume, and is configured to absorb the pressure fluctuation of the suction air on the upstream side of the compressor 3.

  Reference numeral 19 denotes a filter provided on the suction side of the compressor 3, and the filter 19 is disposed on the downstream side of the suction tank 18, for example. The filter 19 removes dust and the like contained in the intake air, and prevents noise (operating sound) from leaking from the suction side of the compressor 3 to the outside.

  On the other hand, 20 is an intermediate pipe that connects the discharge port 6E of the low-pressure cylinder 6 and the suction port 7D of the high-pressure cylinder 7, and the intermediate pipe 20 applies high-pressure compressed air discharged from the low-pressure side discharge port 6E. Suction into the suction port 7D on the side.

  Reference numeral 21 denotes a discharge pipe provided on the discharge side of the compressor 3, and one end side of the discharge pipe 21 is connected to a discharge port 7E of the high-pressure cylinder 7, and compressed air discharged from the discharge port 7E flows therethrough. is there. The other end of the discharge pipe 21 is connected to an air supply port 23 via a storage tank 22 that stores compressed air, and the air supply port 23 is compressed by an external pneumatic device (not shown) or the like. It is configured to supply air.

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

  First, when the motor 8 is actuated, the rotation is transmitted to the crankshaft 5 of the compressor 3 via pulleys, belts, etc., so that the pistons 6B and 7B in the cylinders 6A and 7A of the cylinders 6 and 7, respectively. Reciprocates. As a result, when outside air is sucked from the suction port 9, the sucked air is sucked into the suction port 6 </ b> D of the low-pressure cylinder 6 after sequentially flowing through the suction-side dryer 11, the suction tank 18 and the filter 19.

  At this time, since the moisture is removed from the suction air by passing through the suction-side dryer 11 and the suction tank 18, dry suction air having a low humidity flows into the low-pressure cylinder 6. As a result, it is possible to protect the components such as the suction valve, the discharge valve, the bearing, the seal, and the lubricant (lubricating oil) disposed in the low pressure cylinder 6 from moisture, and rust of the components due to moisture, deterioration of quality, etc. It is possible to extend the life of each part by suppressing.

  The intake air is compressed in the cylinder 6A of the low-pressure cylinder 6 to become compressed air of intermediate pressure, and further compressed in the cylinder 7A of the high-pressure cylinder 7 to become high-pressure compressed air. The high-pressure compressed air is stored in the storage tank 22 through the discharge pipe 21 and supplied to an external pneumatic device or the like from the air supply port 23 as necessary.

  In this case, the temperature of the air sucked into each of the cylinders 6 and 7 rises as it is compressed in an adiabatic state. However, since these air can be cooled in advance by the suction-side dryer 11, the temperature of the compressed air discharged from the individual cylinders 6 and 7 can be lowered by the amount preliminarily precooled.

  Thereby, when the compressor 3 is operated, the maximum temperature that the compressed air can reach can be lowered as a whole, and components such as bearings, seals, and lubricating oils arranged in the cylinders 6 and 7 can be reduced from a high temperature. Can be protected. For this reason, the thermal deterioration of each component can be suppressed, the lifetime of the component can be extended, and durability and reliability can be enhanced.

  In addition, the cylinders 6 and 7 can suck a sufficient amount of low-temperature intake air in a state where thermal expansion is suppressed, and compression efficiency can be increased. Thereby, the high pressure and high performance can be realized while ensuring the heat resistance of the air compressor.

  Thus, according to the present embodiment, since the refrigeration-type suction-side dryer 11 is provided on the suction side of the compressor 3, the moisture contained in the suction air by the suction-side dryer 11 when the compressor 3 is operated. The intake air with low humidity can be stably flowed into the compressor 3.

  As a result, for example, the suction valve and the discharge valve in the compressor 3 can be reliably prevented from rusting due to moisture and the lubricant (lubricating oil) from being deteriorated by moisture. Can be operated. Therefore, it is possible to realize an air compression device that is highly adaptable to a humid environment and the like, and to improve its compression performance, durability, and reliability.

  In this case, since the suction-side dryer 11 made of a refrigeration dryer or the like is used as the moisture removing means, the suction-side dryer 11 condenses moisture contained in the air while cooling the suction air with the refrigerant C. The suction air that flows into the compressor 3 can be efficiently dried.

  Further, by using the suction side dryer 11, the temperature of the compressed air can be lowered by the amount that the suction air is precooled first. For this reason, it can prevent that the components of the compressor 3 deteriorate by high temperature, and can improve heat resistance. In addition, since the compressor 3 can sufficiently suck in low-temperature intake air that suppresses thermal expansion, the compression efficiency can be increased, and high performance (high pressure) of the air compressor can be realized. Can do.

  In addition, since the suction tank 18 is provided between the compressor 3 and the suction side dryer 11, when the suction air flows from the suction side dryer 11 toward the compressor 3, the suction tank 18 is placed in the middle of the flow path. Can intervene. As a result, the suction tank 18 can condense and remove moisture contained in the low-temperature suction air on the inner wall of the tank 18, and efficiently cooperate with the suction-side dryer 11. Can be dried.

  For example, even if pulsation occurs in the pressure of the intake air in the suction pipe 10, this pulsation can be absorbed by the suction tank 18, and the influence of the pulsation can be reduced on the compressor 3 side. For this reason, for example, a suction valve, a discharge valve, and the like in the compressor 3 can be protected from excessive pressure fluctuations, and damage to these components can be prevented and durability can be enhanced.

  Next, FIGS. 3 and 4 show a second embodiment according to the present invention. The feature of this embodiment is that a discharge-side dryer is provided in addition to the suction-side dryer, and these dryers are shared. It is to have done. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Reference numeral 30 denotes a discharge pipe provided on the discharge side of the compressor 3. The discharge pipe 30 has a portion located on the upstream side of the storage tank 22 formed in substantially the same manner as in the first embodiment. An extension pipe portion 30 </ b> A extending toward a shared dryer 31 described later is provided at a portion located on the downstream side of the tank 22.

  Reference numeral 31 denotes a shared dryer as a moisture removing means used in the present embodiment in place of the suction-side dryer 11 of the first embodiment. The shared dryer 31 is composed of a refrigeration dryer or the like that is substantially the same as that of the first embodiment, and includes a refrigerant compressor 12, a condenser 13, a receiver tank 14, an expansion valve 15, a refrigerant pipe 17, and heat exchange described later. The device 32 is configured.

  However, the shared dryer 31 is a common use of the suction side dryer provided on the suction side of the compressor 3 and the discharge side dryer provided on the discharge side of the compressor 3, and the suction air and the compressed air are shared. These airs are dehumidified together by cooling with the refrigerant C.

  32 is a heat exchanger connected to the outflow side of the condenser 13, and this heat exchanger 32 is in the middle of the suction side air passage 32 </ b> A connected in the middle of the suction pipe 10 and the extended pipe portion 30 </ b> A of the discharge pipe 30. The discharge side air passage 32B is connected to the refrigerant passage 32B, and the refrigerant passage 32C is disposed in the vicinity of the two air passages 32A and 32B and connected in the middle of the refrigerant pipe 17.

  The heat exchanger 32 vaporizes the liquefied refrigerant C in the vicinity of the air passages 32A and 32B, thereby combining the suction air flowing through the suction side air passage 32A and the compressed air flowing through the discharge side air passage 32B together. Cool down. For this reason, the moisture contained in the intake air and the compressed air is condensed in each of the air passages 32A and 32B and discharged to the outside through a drain passage (not shown) or the like. Thus, the shared dryer 31 can dry the intake air and the compressed air.

  Thus, in the present embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first embodiment. In particular, in the present embodiment, since the shared dryer 31 is used, the compressed air can be dehumidified by the shared dryer 31. For example, compression with low humidity toward an external pneumatic device or the like is possible. Air can be supplied stably. Therefore, not only the compressor 3 but also external devices connected to the compressor can suppress rusting, deterioration, etc. of parts, and an air compressor that can be easily handled as an air pressure source can be realized. .

  Further, since the suction-side dryer and the discharge-side dryer can be shared by the shared dryer 31, there is no need to separately arrange these two dryers in the soundproof box 1, and parts related to the dryer are eliminated. The number of points, the arrangement space of parts, etc. can be reduced. Therefore, even if it is an air compressor provided with the function of a dryer on both the suction side and the discharge side, it can be formed compactly and the assembly work of the compressor can be performed efficiently.

  In addition, for example, in the case of an air compressor in which a discharge-side dryer is mounted in advance as in the prior art, a part of the suction pipe 10 can be extended to the position of the existing discharge-side dryer and connected to the dryer. Thus, a suction-side dryer can also be formed. For this reason, the shared dryer 31 can be easily realized by using the existing discharge side dryer, and the cost increase can be suppressed.

  In the second embodiment, the case where the suction-side and discharge-side dryers are configured as the shared dryer 31 has been described as an example. However, the present invention is not limited to this. For example, as in the modification shown in FIG. 5, the suction-side dryer 11 that cools the suction air with the refrigerant and dehumidifies the suction air, and the compressed air that is cooled with the refrigerant and compressed. The discharge-side dryer 41 that performs dehumidification of air may be configured by individual refrigeration dryers.

  In the embodiment, the suction tank 18 and the filter 19 are provided between the suction side dryer 11 (shared dryer 31) and the compressor 3. However, the present invention does not necessarily require the use of the suction tank 18, and for example, an air compression device having a specification in which the suction tank 18 is not mounted may be configured. Further, the filter 19 of the present invention may be connected to any position as long as it is on the suction side (upstream side) of the compressor 3. For example, the filter 19 may be attached to the suction port 9.

  In the embodiment, the refrigeration dryers 11 and 31 are used as the moisture removing means. However, the moisture removing means of the present invention is not limited to a refrigeration dryer, and may be configured to use an adsorption dryer that adsorbs and removes moisture with a dehumidifying agent such as silica gel. In addition, moisture removing means other than a dryer may be used. For example, a cooler device that cools the suction pipe 10 with air (cooling air) may be used as the moisture removing means.

  Furthermore, in the embodiment, the package type two-cylinder / two-stage reciprocating compressor has been described as an example of the air compressor. However, the present invention is not limited to this, and may be applied to, for example, a single-cylinder or two-cylinder compressor, a single-stage compressor, or an air compressor equipped with a scroll compressor. It can be widely applied to air compression devices other than molds.

1 is a front view showing a package type air compression device according to a first embodiment of the present invention with a front surface portion removed. It is a block diagram which shows the whole structure of an air compressor. It is a front view which shows the state which removed the front-surface part the package type air compression apparatus by the 2nd Embodiment of this invention. It is a block diagram which shows the whole structure of an air compressor. It is a block diagram which shows the whole structure of the air compressor by the modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Soundproof box 3 Compressor 6, 7 cylinder 8 Motor 9 Suction port 10 Suction piping 11 Suction side dryer (moisture removal means)
DESCRIPTION OF SYMBOLS 12 Refrigerant compressor 13 Condenser 14 Receiver tank 15 Expansion valve 16, 32 Heat exchanger 16A, 32A, 32B Air passage 16B, 32C Refrigerant passage 17 Refrigerant piping 18 Suction tank 18A Drain discharge port 18B Heat insulating material 19 Filter 20 Intermediate piping 21 , 30 Discharge piping 22 Storage tank 23 Air supply port 31 Shared dryer (moisture removal means)
41 Discharge side dryer C Refrigerant

Claims (5)

  A compressor that sucks and compresses air and discharges the compressed air; and a moisture removing means that is provided on the suction side of the compressor and removes moisture contained in the sucked air when air is sucked into the compressor. An air compression device comprising the above.   The air compressor according to claim 1, wherein the moisture removing means is a suction-side dryer that cools the suction air with a refrigerant and dehumidifies the suction air.   The air compressor according to claim 1 or 2, wherein a discharge side dryer for cooling compressed air with a refrigerant and dehumidifying the compressed air is provided on a discharge side of the compressor.   The moisture removing means is a shared dryer in which a suction-side dryer that cools the suction air with a refrigerant and dehumidifies the suction air, and a discharge-side dryer that cools the compressed air with a refrigerant and dehumidifies the compressed air. The air compressor according to claim 1, which is configured as follows. The air compressor according to claim 1, 2, 3, or 4, wherein a suction tank through which suction air flows is provided between the moisture removing means and the compressor.

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