JPH0494477A - Package type air compressor - Google Patents

Abstract

PURPOSE:To efficiently cool a compressor main unit, motor, air tank and a cooler by displacing a position of an air suction hole from that of an exhaust hole, and further allowing a blade of a pulley to blow air in a suction direction of air from the air suction hole. CONSTITUTION:In a package type air compressor 1, a ventilating hole is provided in an upper surface of a mounting bed 3 to store a cooler 8 in the mounting bed 3. An air suction hole 24 is formed opposedly to a pulley 4, having blades, in a package 2 and also providing an exhaust hole 25 so as to circulate cooling air in the package 2. In this way, the cooling air, sucked from the suction hole 24, can be discharged not immediately but from the exhaust hole 25 after circulation in the package 2. Accordingly, a compressor main unit 5, motor 6, air tank 7 and the cooler 8 can be efficiently cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" This invention relates to a packaged air compressor.

``Prior Art'' Conventionally, as an example of an air compressor, a connecting rod in the compressor body is driven by a motor, and a piston in a printer is reciprocated via this connecting rod, thereby sucking air into the printer. It is known that air is sucked in through a valve and is compressed and then discharged through a discharge valve.

This air compressor is configured as described above, so
Noise is generated by the operating sound of the motor, the sliding sound of the piston, the operating sound of the suction valve and discharge valve, etc.

Therefore, various packaged air compressors have been devised in which the compressor body and the motor that drives it are installed inside the package to prevent the noise generated by the compressor from being emitted to the outside, and which also employs various cooling means. ing.

An example of a packaged air compressor is a multi-stage air compressor housed in a package, which has blades that produce a fan action and is attached to the crankshaft of the compressor body and connected to the motor via a belt. A cooler is installed behind the pulley, and air is sucked in through the air suction hole located on the rear wall facing the compressor drive pulley at the top of the motor, and the compressed air compressed by the low-pressure side cylinder of the compressor is fed into the cooler. It is known that the compressed air is cooled by the self-radiating means of the cooler and the cooling air generated by the rotation of the pulley, and the compressed air is exhausted from an exhaust hole provided below the pulley.

``Invention or Problem to be Solved'' However, in conventional packaged air compressors like this, the cooling air generated by the pulley is exhausted through the shortest path to the exhaust hole, which is the so-called Nyotobus phenomenon. This caused a problem with the compressor's cooling efficiency.

Also, the cooler or the compressor body which is a heat generation source.

Since it was located in the same room as the motor, there was a problem of insufficient cooling by the cooler.

Furthermore, since the cooler is provided behind the pulley, there is a problem in that the cooler takes up space and the package must be made larger accordingly.

The present invention is different from the conventional packaged air compressor.
It is an object of the present invention to provide a packaged air compressor which solves the above problems, has a high noise prevention effect and compressor cooling efficiency, and allows a relatively small back cage.

"Means for Solving the Problems" In order to achieve the above object, the present invention has the following configuration. That is, a package, a pedestal provided in the package, a pulley provided with fan blades, and mounted on the pedestal are a compressor main body provided in the package, and the compressor main body. a motor connected to the compressor body via the pulley, mounted on the pedestal, and provided in the package to drive the compressor main body; and a motor connected to the compressor main body, mounted on the pedestal, and provided in the package. In a package compressor equipped with an air tank and a cooler that is connected to an air compression section of the compressor and cools the air compressed by the air compression section, the mount is provided with a ventilation hole on the top surface of the mount. The cooler is housed in the package, an air suction hole is formed in the package opposite to the pulley having blades, and at least one of the mount and the package is configured to circulate cooling air within the package. It is equipped with an exhaust hole.

"Function" According to the above configuration, the cooling air can be easily flowed by the misalignment of the air suction hole and the exhaust hole and by blowing air in the direction of air suction from the pulley blades or the air suction hole. The compressor body, motor,
The air tank is cooled, and a portion of the air enters the cooler through the ventilation hole, circulates within the package, cools the cooler, and is exhausted through the exhaust hole.

On the other hand, since a cooler is connected to the air compression section of the compressor, the air compressed by the air compression section passes through the cooler cooled by the cooling air sucked into the pan cage.
It is cooled and compressed by this cooler.

In addition, in this case, since the cooler is installed in a frame that is in a separate room from the compressor main body 2 motor, which is a heat generation source, there is no possibility of rapid heat transfer directly from the cooler, compressor, or motor. It is possible to avoid insufficient cooling by the cooler, and since the cooler is housed in the frame, the cooler does not take up much space and the package can be made larger to install the cooler. It is possible to solve the problem of having to do this.

"Embodiment" Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 4.

1 and 2 is a packaged air compressor (hereinafter simply referred to as a compressor). A compressor main body 5 having a pulley 4 provided and mounted on a mount 3 and provided inside the package 2; An air tank 7 connected to the compressor body 5 and mounted on the pedestal 3 and provided inside the package 2 communicates with the air compression section of the compressor 1. It is generally composed of a cooler 8 that cools the air compressed by the air compression section.

The compressor body 5 is connected to a motor 6 via a pulley 6a, a belt 21, and the pulley 4, and the compressor body 5 includes a low-pressure side cylinder (air compression section) 22.2 that performs first stage compression.
2 and a high-pressure side cylinder (air compression section) 23 that performs second-stage compression. The pulley 4 of the compressor main body 5 has blades (not shown) and functions as an air suction fan.

On the back wall of the package 2, as shown in FIG. 3, many rectangular air intake holes 24 are formed at positions facing the pulley 4, and many rectangular exhaust holes 25 are formed at positions facing the motor 6. has been done.

Therefore, the air suction hole 24 and the exhaust hole 25 are formed at different positions.

Further, on the back wall of the package 2, a duct 26 is provided with an air suction hole 24. It is attached opposite to the exhaust hole 25. The duct 26 has an air suction port 28 formed in the upper part of the middle stage 27 of the side wall on the air suction hole 24 side of the box having the middle stage 27, and an exhaust port 29 formed in the lower part of the middle stage 27 of the side wall on the exhaust hole 25 side. It is what was done.

The pedestal 3 has a ventilation hole 3 in the center of the upper plate of the rectangular sealed box.
a is formed, and the cooler 8 is housed within the frame 3.

The cooler 8 has an inlet tank 30 and an outlet tank 31, each of which is a rectangular sealed box, separated from each other and opposed to each other. The inlet tank 30 and the outlet tank 31 are connected by several vibrators 32, and the inlet tank 30 and the outlet tank 31 are connected through these vibrators 32. Furthermore, the upper surface of the inlet tank 30 is communicated with the inside of the inlet tank 30, and is penetrated through the frame 3 to communicate with the inlet tank 30 and the outlet tank 31. An inlet 33 protruding to the upper surface of the outlet tank 31 is provided with an outlet 34 that communicates with the inside of the outlet tank 31 and protrudes upward through the pedestal 3.

The inlet 33 is connected to the discharge port of the low-pressure side cylinder 22 through piping, and the outlet 34 is connected to the air inlet of the high-pressure side cylinder 23 through piping.

Next, the operation of the compressor configured as described above will be explained.

When the compressor 1 is operated, the pulley 4 rotates via the pulley 6a and the belt 21. Then, the pulley 4 acts as an air suction fan, and the cooling air outside the package 2 flows through the air suction port 28 of the duct 26 shown in FIG. The air is sucked into the pan cage 2 through the air suction hole 24 on the back wall of the package 2, circulates within the pan cage 2, and flows into the package 2 and the compressor body 5 inside the package 2. The motor 6 and the air tank 7 are cooled, and the air flows into the frame 3 through the ventilation hole 3a to cool the cooler 8.
5. It passes through the exhaust port 29 and is exhausted to the outside.

In this case, the positions of the air suction hole 24 and the exhaust hole 25 are misaligned, and the blades of the pulley 4 act as an air suction fan that blows air in the direction of air suction from the air suction hole 24. The cooling air sucked in through the suction hole 24 is not immediately exhausted through the exhaust hole 25, but instead circulates within the package 2 as described above, and then flows through the compressor main body 5. motor 6
, air cools the tank 7, flows into the frame 3, cools the cooler 8, and cools the air exhaust hole 25. The air is exhausted from the exhaust port 29.

On the other hand, the compressed air compressed by the low-pressure side cylinder 22 of the compressor 1 flows into the inlet tank 30 from the inlet 33 of the cooler 8 in the frame 3 via piping, is divided into a large number of vibrators 32, and is It enters the outlet tank 31 via the vibrator 32 and is cooled by the cooler 8 which is cooled by the above-mentioned cooling air that has flowed into the frame 3 in this cooler 8 section, and then passes through piping to the high pressure side cylinder 23. flows into the interior, where it is compressed in the second stage,
Furthermore, it flows into the air tank 7 and is stored therein. Therefore, the air compressed by the high-pressure side cylinder 23 is cooled, so that the compression performance of the compressor is improved.

In addition, in this embodiment, the exhaust hole 25 is provided in a position that makes it difficult for exhaust gas to enter the air suction hole 24, so collision between the intake air and the exhaust air is prevented, noise is significantly reduced, and the exhaust port Since it is located on the back side of the package 2, this also significantly reduces noise.

In the above embodiment, the ventilation hole 3a that is open is provided on the top surface of the pedestal 3, but the invention is not limited to this. For example, as shown in FIG. 5 and FIG. It is also possible to provide a ventilation hole 45 in the shape of a shape, and to provide a mesh-like exhaust hole 46 on the rear surface of the pedestal 44, and to house the same cooler 8 as the cooler 8 in the first embodiment in the pedestal 44. In this case, the exhaust hole 25 of the package 2 is omitted, and the middle stage 2 of the duct 26 of the above embodiment is connected to the back wall of the package 2.
It is sufficient to attach a duct) 41 in the shape of 7 with the lower part removed. That is, an air suction hole 24 is provided on the back wall of the package 2.
It is sufficient to attach a box-shaped duct 41 with an air suction port 42 opposite to the duct 41. 43 is the bottom of the duct 41.

"Effects of the Invention" According to the present invention, the positions of the air suction hole and the exhaust hole are misaligned, and the blades of the pulley blow air in the direction of air suction from the air suction hole. The sucked cooling air can be circulated within the package without being exhausted through the exhaust hole, and then flowed into the frame and exhausted through the exhaust hole. This allows the compressor body, motor, air tank, The cooler can be efficiently cooled.

In addition, the air compressed by the air compression section of the compressor passes through a cooler that is cooled by the cooling air sucked into the package, and is cooled and compressed by this cooler, improving the compression efficiency of the compressor. do. Furthermore, in this case, since the cooler is installed in a frame that is in a separate room from the compressor main body and the motor, which are heat generation sources, the cooler
It is possible to avoid sudden heat transfer directly from the motor, and it is possible to prevent insufficient cooling by the cooler.As a result, the compressor's lubricating oil is prevented from becoming cloudy, the discharge air is lowered in temperature, and the compressor performance is improved. This improves the durability and reliability of the compressor.

In addition, since the cooler is housed within the frame, the cooler does not take up much space, and the problem of having to make the package thicker to install the cooler can be solved, allowing for miniaturization. I can do it.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention,
Figure 1 is a schematic front view showing the inside of the package with the front plate removed, Figure 2 is a side view showing the inside of the package with the side plate removed, Figure 3 is a perspective view of the package, and Figure 4 is the pedestal. 5 and 6 show other embodiments of the present invention, FIG. 5 is a perspective view of the pedestal, and FIG. 6 is a perspective view of the pedestal and package. 1...Packaged air compressor, 2...
Package, 3, 44... Frame, 3a, 45 ・
・Vent hole, 4...Pulley, 5. Compressor body,
6... Motor, 7... Air tank, 8. Cooler, 24... Air suction hole, 25. Exhaust hole, 28.4
2 ・Suction port, 29. ・Exhaust port.

Claims (1)

[Claims] a package, a pedestal provided on the package, a compressor body having a pulley provided with fan blades and mounted on the pedestal and provided within the package; an air motor connected to the compressor main body, mounted on the mount, and provided in the package to drive the compressor main body; and an air motor connected to the compressor main body, mounted on the mount and provided in the package. In a package compressor that is provided with a tank and a cooler that is connected to an air compression section of the compressor and cools the air compressed by the air compression section, a ventilation hole is provided on the top surface of the mount and the A cooler is housed, an air suction hole is formed in the package facing the pulley having the blades, and an exhaust hole is formed in at least one of the mount and the package so that cooling air circulates within the package. A packaged air compressor characterized by: