JP2012036870A - Package type compression equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide package type compression equipment superior in silence.SOLUTION: The package type compression equipment 1 includes a compressor body 4 and a duct 8 for connecting a suction flow passage of the compressor body 4 and an external part of an external facing 3, inside the external facing 3. The duct 8 is formed with an external opening 10 for opening in the external part of the external facing and an internal opening 9 communicating with the suction flow passage of the compressor body 4, and can fix an air filter 11 to the inside to cover the internal opening 9. A baffle plate 12 vertical to the advancing direction of air is arranged between the external opening 10 and the internal opening 9, and a sound absorbing material is arranged on an inner surface.

Description

  The present invention relates to a package type compression apparatus.

  As described in Patent Document 1, not only the compressor body, but also auxiliary equipment such as an oil separator that separates oil from the discharged compressed air and an oil cooler that cools the oil are placed inside the box-shaped exterior. Arranged package type compression devices are commercially available.

  The package-type compression apparatus usually has a duct that connects a suction flow path of the compressor body and an intake port provided in the exterior, and an air filter for removing dust is disposed at the intake port.

  Depending on the conditions such as the installation location, the package type compression apparatus may be required to be quiet. Various components of the package-type compression apparatus serve as noise generation sources, and a duct connecting the intake port and the suction flow path is also one noise generation source. The duct also serves as a path for transmitting the noise generated by the compressor body to the outside.

  Generally, as a measure for preventing the generation of noise in the duct, a sound absorbing material such as urethane foam is stuck inside the duct. However, if a sound absorbing material is attached to the duct of the package type compression apparatus, the sound absorbing material that has been peeled off may be sucked into the compressor main body, possibly damaging the compressor main body. In particular, a fibrous sound-absorbing material known as a sound-absorbing material having excellent sound-absorbing performance cannot be used for a duct of a package-type compression device because the fibers easily fall off.

Japanese Patent No. 3777343

  In view of the above problems, an object of the present invention is to provide a package-type compression device having excellent silence.

  In order to solve the above problems, a package-type compression device according to the present invention is a package in which a compressor main body, and a duct connecting the suction flow path of the compressor main body and the outside of the outer casing are provided inside the outer casing. The duct is an air filter so that an external opening that opens to the outside of the exterior and an internal opening that communicates with the suction flow path of the compressor body are formed, and the air filter covers the internal opening on the inside A package type compression device, characterized in that a sound-absorbing material is disposed on the inner surface.

  According to this configuration, since the air filter is disposed at the most downstream side of the duct, even if the sound absorbing material disposed inside the duct is peeled off, it can be captured by the air filter and sucked into the compressor body. Absent. For this reason, it is possible to improve the quietness of the duct regardless of the type of the sound absorbing material.

  In the package compression apparatus of the present invention, a baffle plate perpendicular to the air traveling direction may be disposed between the external opening and the internal opening.

  According to this configuration, it is possible to block the sound generated in the compressor main body and the air filter by the baffle plate so as not to leak outside.

  Further, in the package type compression apparatus of the present invention, the inner opening opens to a bottom surface of the duct, and the duct has a side wall in the vicinity of the inner opening that can be removed in order to insert the air filter. Good.

  According to this configuration, since the duct can be connected to the suction flow path of the compressor main body that opens upward in the shortest distance, the package can be downsized.

  In the package compression apparatus of the present invention, the removable side wall has a support plate extending along the bottom wall of the duct so as to surround the internal opening, and holds the air filter on the support plate. A holding member may be provided.

  According to this configuration, the air filter can be easily fixed by holding the air filter on the support plate and attaching the side wall to fix the air filter at the same time.

  Further, in the package type compression device of the present invention, the duct has a positioning member for positioning the air filter, and the air filter is adsorbed to the bottom wall of the duct by the suction pressure of the compressor body. Also good.

  According to this configuration, since the air filter does not have to be fixed, the air filter can be easily replaced.

  As described above, in the present invention, since the air filter is disposed on the most downstream side inside the duct for introducing outside air into the compressor body, the type of the sound absorbing material disposed on the inside of the duct is not selected. As a result, even a sound-absorbing material that may generate foreign matter due to deterioration or dropout can be used inside the duct, and it has become easy to improve the silence.

It is a schematic block diagram of the package type compression apparatus of 1st Embodiment of this invention. It is a perspective view of the duct of FIG. It is a perspective view of the duct of the package type compression apparatus of 2nd Embodiment of this invention. It is a fragmentary sectional view of the duct of the package type compression apparatus of 3rd Embodiment of this invention. It is a fragmentary sectional view of the duct of the package type compression apparatus of 4th Embodiment of this invention.

  Embodiments of the present invention will now be described with reference to the drawings. In FIG. 1, the structure of the package type compression apparatus 1 of 1st Embodiment of this invention is simplified and shown. The package type compression apparatus 1 supports an exterior panel 3 on a base 2 by a frame (not shown), and a compressor body 4 that is a two-stage screw compressor, and a compressor body 4 inside the exterior panel 3. An adjustment valve 5 provided on the suction side and a duct 8 connected to the adjustment valve 5 via a flexible hose 6 and communicating with an intake port 7 formed in the exterior panel 3 are accommodated.

  The duct 8 has an internal opening 9 that communicates with the suction flow path of the compressor body 4 via the adjustment valve 5 and the flexible hose 6, and an external opening 10 that matches the intake port 7 of the exterior panel 3. An air filter 11 is detachably fixed inside the duct 8 so as to cover the internal opening 9. A plurality of baffle plates 12 that are perpendicular to the direction of air travel from the external opening 10 to the air filter 11 are alternately arranged inside the duct 8. The baffle plates 12 may be alternately arranged on the upper and lower surfaces of the duct 8 or may be alternately arranged on the side surfaces. In addition, the sound absorbing material 13 is attached to the inner surface of the duct 8 almost entirely except for the vicinity of the air filter 11.

  In the present embodiment, the air filter 11 does not remove dust from the air when it flows into the duct 8 from the outside as in the prior art, but immediately before it is sucked into the compressor body 4 through the duct 8. Remove dust from the air. For this reason, even if the sound absorbing material 13 adhered to the inner surface of the duct 8 positioned on the upstream side of the air filter 11 is peeled off or chipped, it is captured by the air filter 11, and therefore passes through the internal opening 9 and is compressed. It does not flow into the suction channel of the main body 4.

That is, in the present embodiment, as the sound absorbing material 13, it is possible to use a material that is excellent in sound absorbing performance but is easily lost or dropped, for example, a fibrous sound absorbing material. Thereby, the vibration by the airflow of the duct 8 can be suppressed efficiently, and the generation of noise can be prevented.

  Further, by providing the baffle plate 12 in the duct 8, the operation sound of the compressor body 4 leaking through the air filter 11 and the suction sound generated in the air filter 11 are directly propagated to the external opening 10. The sound leaking from the external opening 10 is reduced. That is, it is desirable that the baffle plate 12 be arranged so that the air filter 11 cannot be directly seen from the external opening 10. Of course, it is desirable to attach the sound absorbing material 13 to the baffle plate 12 as well.

  Further, as shown in detail in FIG. 2, the side wall 14 in the vicinity of the internal opening 9 is removable from the duct 8. The duct 8 that is linearly connected to the suction flow path that opens vertically upward from the compressor body 4 via the adjustment valve 5 and the flexible hose 6 may have a height that is close to a human height. For this reason, since it is not easy to replace the air filter 11 from the upper side, the air filter 11 can be replaced from the side.

  An arcuate positioning member 15 for positioning the air filter 11 concentrically with the internal opening 9 is provided on the inner surface of the bottom wall of the duct 8. Further, an elastic holding member 16 is provided on the inner surface of the bottom wall of the duct 8 and the removable side wall 14 in order to hold the lower portion of the air filter 11.

  The air filter 11 is arranged with the positioning member 15 centered on the internal opening 9, is sucked toward the internal opening 9 by the suction pressure generated by the operation of the compressor body 4, and is brought into close contact with the bottom wall of the duct 8. . Thereby, the air filter 11 reliably removes dust from the air sucked by the compressor body 4.

  FIG. 3 shows a duct 8a of the package type compression apparatus according to the second embodiment of the present invention. Other configurations are the same as those in the first embodiment, and thus redundant description is omitted. Further, the sound absorbing material 13 is not shown in FIG.

  In the duct 8a of this embodiment, the removable side wall 14a is curved in an arcuate shape, and the side wall 14a has a support plate 17 that extends horizontally along the inner surface of the bottom wall of the duct 8a. The support plate 17 surrounds the internal opening 9, that is, has a hole 18 corresponding to the internal opening 9. Further, the support plate 17 is provided with a plurality of holding members 16 that hold the air filter 11 so as to surround the hole 18.

  In the present embodiment, the air filter 11 is attached to the support plate 17 of the removed side wall 14a, and the side wall 14a is attached to the duct 8a, so that the air filter 11 can be disposed on the internal opening 9. . The suction force of the compressor body 4 causes the support plate 17 to be in close contact with the bottom wall of the duct 8 a and attracts the air filter 11 to the support plate 17.

  In FIG. 4, the cross section of the duct 8b of the package type compression apparatus of 3rd Embodiment of this invention is shown. Also in the present embodiment, configurations not mentioned are the same as those in the first embodiment.

  The air filter 11a of the present embodiment has a sleeve 19 that protrudes so as to fit inside the internal opening 9 on the bottom surface, and an elastic member 20 that presses against the upper wall of the duct 8b on the top surface. In the present embodiment, the height of the internal space of the duct 8b (the gap between the bottom wall and the top wall) is about 15 mm larger than the height of the main body of the air filter 11a, and the sleeve 19 is about 10 mm from the main body of the air filter 11a. The elastic member 20 is made of urethane foam having a thickness of about 20 mm.

  In this embodiment, when attaching the air filter 11a, the air filter 11a is pushed into the duct 8b from the side with the elastic member 20 compressed to about 5 mm. When the sleeve 19 is fitted into the internal opening 9, the elastic member 20 expands to a thickness of about 15 mm. Even in this state, the elastic member 20 is still compressed by about 5 mm from its natural thickness. Thereby, the elastic member 20 presses the main body of the air filter 11a against the bottom wall of the duct 8b, and improves adhesiveness.

  Further, FIG. 5 shows a cross section of the duct 8c of the package type compression apparatus according to the fourth embodiment of the present invention. In the present embodiment, configurations not mentioned are the same as those in the third embodiment. Since the air filter 11b of the present embodiment does not have the sleeve 19 and cannot be positioned by itself with respect to the internal opening 9, a positioning member 15a is provided in the duct 8c.

DESCRIPTION OF SYMBOLS 1 ... Package type compression apparatus 3 ... Exterior panel 4 ... Compressor main body 8, 8a, 8b, 8c ... Duct 7 ... Intake port 9 ... Internal opening 10 ... External opening 11, 11a, 11b ... Air filter 12 ... Baffle plate 13 ... Sound absorbing material 14, 14a ... Removable side wall 15, 15a ... Positioning member 16 ... Holding member 17 ... Support plate 18 ... Hole 19 ... Sleeve 20 ... Elastic member

Claims (5)

A package type compression device provided with a compressor main body, a duct connecting the suction flow path of the compressor main body and the outside of the outer casing inside the outer casing,
The duct is formed with an external opening that opens to the outside of the exterior and an internal opening that communicates with a suction flow path of the compressor body, and an air filter can be fixed inside the duct so as to cover the internal opening. A package type compression device, wherein a sound absorbing material is disposed on the package.   2. The package type compression device according to claim 1, wherein a baffle plate perpendicular to an air traveling direction is disposed between the outer opening and the inner opening. The internal opening opens to the bottom of the duct;
The package type compression device according to claim 1 or 2, wherein a side wall in the vicinity of the internal opening is removable for the duct to be inserted into the air filter.   The removable side wall has a support plate extending along the bottom wall of the duct so as to surround the internal opening, and a holding member for holding the air filter is provided on the support plate. The package type compression apparatus according to claim 3. The duct has a positioning member for positioning the air filter,
5. The package type compression apparatus according to claim 1, wherein the air filter is adsorbed to a bottom wall of the duct by a suction pressure of the compressor body.

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