JP3383967B2 - Soundproof air compressor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof air compressor.

[0002]

2. Description of the Related Art FIG. 5 schematically shows an example of a conventional soundproof air compressor. Reference numeral 1 denotes a soundproof box. In this soundproof box 1, air inlets 2 and 3 are formed on the right side wall and the lower side wall in the figure, and an air outlet 4 is formed on the left side wall. . Inside the soundproof box 1, an engine radiator 5 which is an air-cooled heat exchange device, a compressor oil cooler 6 and an aftercooler 7 are installed.
, An engine 9 equipped with a discharge fan 8, a compressor body 10, and a receiver tank 11 having an oil separator.
And are arranged. Then, the engine radiator 5, the compressor oil cooler 6, and the aftercooler 7
Are provided side by side between the air outlet 4 and the discharge fan 8.

During operation, the engine body 9 drives the compressor body 10. Cooled oil is supplied to the compressor body 10 from the receiver tank 11 via the compressor oil cooler 6 for lubrication and cooling. And
Compressed air (discharged air) containing the oil is discharged from the compressor body 10. This compressed air passes through an oil separator built in the receiver tank 11, where the compressed air and oil are separated and collected in the receiver tank 11. On the other hand, the compressed air from which the oil has been removed is supplied to the consumer side such as an air tool through the aftercooler 7 and the drain tank (not shown). Also, the engine radiator 5 is
The cooling water for the engine 9 passes through. Further, as the discharge fan 8 rotates, an air flow of cooling air that flows into the soundproof box 1 from the air inlets 2 and 3 and flows out from the air outlet 4 is generated as shown by the arrow. As a result, each part in the soundproof box 1, including the engine radiator 5, the compressor oil cooler 6, and the aftercooler 7, is cooled.

The aftercooler 7 is provided for the following reason. That is, the temperature of the compressed air when discharged from the compressor body 10 is about 60 ℃,
It is considerably higher than the outside temperature. If the compressed air passes through the pipe to an air tool while it is still hot, dew condensation occurs because it is cooled in the middle of the pipe. When such dew condensation occurs, rust occurs in the piping and the inside of the pneumatic tool, which causes troubles such as the sliding parts of the equipment becoming immobile. In order to prevent such obstacles, compressed air is preheated to 20-40 ° C by the after cooler 7.
It cools to a certain degree and removes water in the compressed air before supplying it to the consumer side.

[0005]

However, in the conventional soundproof type air compressor, in the soundproof box 1, the engine radiator 5, the compressor oil cooler 6 and the aftercooler 7 are discharged from the air outlet 4. Since they are provided side by side with the expression fan 8, the following problems occur. First, during severe cold such as winter, the cold air flowing into the soundproof box 1 causes the oil in the soundproof box 1 or the pipe for air pressure control to be supercooled. This supercooling causes dew condensation or freezing in the pipe, but if such a phenomenon occurs, each control device in the machine may not operate effectively. The aftercooler 7 may not be necessary depending on the intended use, but the aftercooler 7 cannot be easily removed. That is, in order to remove the aftercooler 7, it is necessary to change the mounting relationship with the engine radiator 5 and the compressor oil cooler 6, which makes it difficult to attach and remove the aftercooler 7 and is disadvantageous in manufacturing. is there.

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and a first object of the present invention is to provide a soundproof air compressor in which the aftercooler can be easily attached and detached and which is advantageous in manufacturing. . Furthermore, in this soundproof type air compressor,
The second purpose is to prevent supercooling of the piping in the soundproof box. A third object is to make it possible to adjust the degree of cooling inside the soundproof box.

[0007]

In order to achieve the first object, the invention of claim 1 is an engine equipped with an air-cooling type heat exchange device and a discharge type fan in a soundproof box. A soundproof air compressor in which a compressor body driven by an engine and a receiver tank are arranged, wherein the soundproof box
The air inflow side of the cooling to the provided aftercooler for compressed air cooling of the air-cooled heat exchanger, said soundproofing
On the air discharge side for cooling from the box, an oil cooler for a compressor and a radiator for an engine of the air-cooled heat exchange device are provided.
Equipped with a motor, aftercooler and compressor oil cooler
Equipped on the engine between the engine and radiator
The discharge type fan is arranged .

According to a second aspect of the present invention, in the soundproof air compressor according to the first aspect of the invention, in order to achieve the second object as well, the wall surface of the soundproof box facing the aftercooler is exposed to outside air. For the engine, provided with an air inlet that communicates
The wall of the soundproof box facing the radiator communicates with the outside air.
The air discharge port is provided .

[0009] The invention of claim 3 is the soundproof type air compressor of the second aspect of the present invention, in order to achieve even the third object, wherein the air inlet, for adjusting the outside air inflow The opening area adjusting means is provided.

[0010]

In the soundproof air compressor according to the first aspect of the present invention, during operation, the compressor body is driven by the engine. Cooled oil is supplied to the compressor body via a compressor oil cooler for lubrication and cooling. Then, compressed air containing the oil (discharged air) is discharged from the compressor body, and the compressed air passes through an oil separator built in the receiver tank to separate the air and oil, and further passes through an aftercooler. After cooling and removing the water content in the compressed air, it is supplied to the consumer side. Further, engine cooling water passes through the engine radiator. Further, an air flow is generated in the soundproof box by the discharge fan of the engine, which cools each part in the soundproof box including the engine radiator, the compressor oil cooler, and the aftercooler. Further, Afutaku the air inflow side of the cooling of the soundproof box
Over La is is provided with, on the air discharge side for cooling the soundproof box
The provision of the compressor oil cooler and the engine radiator facilitates the attachment and detachment of the aftercooler.

Further, in the soundproof type air compressor according to the invention of claim 2, the air on the wall surface of the soundproof box facing the aftercooler.
Outside air for cooling flows into the soundproof box from the inlet, and flows out from the air discharge port on the wall surface of the soundproof box facing the engine radiator and the aftercooler. This cooling air is
Immediately after flowing into the soundproof box, it is heated by passing through an aftercooler through which heated compressed air from the compressor body passes. Therefore, it is possible to prevent the pipes and the like in the soundproof box from being overcooled in cold weather such as winter.

Further, in the soundproof air compressor of the third aspect of the present invention, the area of the air inlet facing the aftercooler is adjusted by the opening area adjusting means. As a result, the inflow amount of the outside air for cooling is adjusted so that each device in the soundproof box and the control pipe are not overcooled.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the soundproof air compressor of the present invention will be described below with reference to FIGS. Reference numeral 21 is a soundproof box. This soundproof box 21 is not shown in detail, but is a combination of a plurality of members that can open and close a part of the wall surface or disassemble a part of the wall surface. It has become. And, in the soundproof box 21, on the wall surface at the right end,
An air inlet (opening) 23 having a louver 22 is formed, and an air outlet (opening) 25 having a louver 24 is formed on the left end wall surface. Although not shown, air inlets are also formed in the upper portions of the wall surfaces on both sides of the soundproof box 21. As shown in FIG. 4, the opening area of the air inlet 23 can be appropriately changed by a lid 26 as an opening area adjusting means. This lid 26
Is attachable to and detachable from the outer wall surface of the soundproof box 21 by a screw, but may be attached and detached by fitting, or may be electrically operated to open and close.

In the soundproof box 21, an engine 32 equipped with a discharge fan 31, a compressor body 33 driven by the engine 32, a receiver tank 35 having an oil separator, and an air-cooled heat generator are provided. An engine radiator 36, which is an exchange device, a compressor oil cooler 37, and an aftercooler 38 for cooling compressed air supplied to the consumer side are arranged.

The engine radiator 36 is located at the left end of the soundproof box 21 so as to face the air outlet 25 communicating with the outside air, and the compressor oil cooler 37 is arranged on the right side thereof. . The engine radiator 36 and the compressor oil cooler 37 are unitized by a common unit case 41. In addition, the compressor oil cooler 37
The engine 32 is located on the right side of the, and its discharge fan 31 faces the compressor oil cooler 37. Furthermore, the compressor body 33 is located on the right side of the engine 32,
The receiver tank 35 is located on the right side of the compressor body 33. On the other hand, the aftercooler 38 is located at the right end of the soundproof box 21 so as to face the air inlet 23 communicating with the outside air. The aftercooler 38 itself is a unit and is detachable. In addition,
Between the receiver tank 35 and the aftercooler 38,
A partition plate 42 that rises from the lower surface inside the soundproof box 21 is provided.

To the engine 32, air pipes 48 and 49 from air cleaners 46 and 47 are connected, and an exhaust pipe 52 provided with an exhaust muffler 51 is also connected. Water pipes 53 and 54 through which cooling water passes are provided between the engine 32 and the engine radiator 36.

Further, in the compressor body 33, an air pipe 62 from an air cleaner 61 is connected to an intake port 63, and a pipe 64 to the receiver tank 35 is connected to a discharge port 65. Further, oil pipes 71 and 72 from the receiver tank 35 are connected to the compressor oil cooler 37, and the oil pipe 73 from the compressor oil cooler 37 is connected to the compressor body via an oil filter 74. It is connected to 33 bearings and compression chambers. A drain cock 75 is provided below the receiver tank 35.

Further, an air pipe 81 connected to the receiver tank 35 is connected to an inlet portion of the aftercooler 38. At the outlet portion of the aftercooler 38, water in the compressed and condensed compressed air is collected. A drain tank (not shown) for capturing is provided, and the consumer side connection portion 82 is connected.

Next, the operation of the above configuration will be described. During operation, the compressor body 33 is driven by the engine 32.
Is driven. Oil is supplied to the compressor body 33 from the receiver tank 35 for lubrication and cooling. This oil enters the compressor oil cooler 37 from the receiver tank 35 through the oil pipes 71 and 72, and is cooled there, and then the oil pipes.
It is supplied to the compressor body 33 through the 73 and the oil filter 74.

In the compressor body 33, the outside air is sucked from the air cleaner 61 through the air pipe 62 and compressed. Then, compressed air (discharged air) containing oil for lubrication and cooling is discharged from the compressor body 33 and flows into the receiver tank 35 via the pipe 64. This receiver tank 35
Oil is separated from the compressed air by an oil separator built in the oil separator, and this oil is collected in the receiver tank 35. On the other hand, the compressed air from which the oil has been removed enters the aftercooler 38 via the air pipe 81 and is cooled there by heat exchange. Further, the water condensed by the aftercooler 38 is captured in the drain tank and discharged to the outside. On the other hand, the compressed air is supplied to the consumer side such as a pneumatic tool via a pipe connected to the consumer side connecting portion 82.

The cooling water for the engine 32 passes through the engine radiator 36 and is cooled by heat exchange.

Further, the rotation of the discharge fan 31 of the engine 32 causes the soundproof box to move from the air inlet 23 as indicated by the arrow.
An airflow of the cooling air that flows into the inside 21 and flows out from the air outlet 25 is generated. As a result, including the aftercooler 38, the compressor oil cooler 37, and the engine radiator 36,
Each part in the soundproof box 21 is cooled.

At this time, the aftercooler 38 is installed in the air inlet 23.
Since it is directly opposed to, the outside air for cooling will first pass through the aftercooler 38 immediately after flowing into the soundproof box 21. However, since hot compressed air from the compressor body 33 passes through the aftercooler 38, if the temperature of the outside air for cooling is low, the temperature of the cooling air may rise due to heat exchange with the aftercooler 38. become. For example, even when the temperature of the outside air is about 0 ° C. even in a severe cold such as winter, the temperature of the air inside the soundproof box 21 is increased by passing through the aftercooler 38.
It rises up to about 20 ℃.

Therefore, even in cold weather such as winter, the warm air heated by the aftercooler 38 passes through the soundproof box 21, so that the receiver tank 35 in the soundproof box 21 and other control devices and their control pipes, etc. Are prevented from being overcooled. As a result, it is possible to prevent dew condensation and freezing of water that occur in the pipe or the like.

Moreover, the partition plate 42 provided between the receiver tank 35 and the aftercooler 38 allows the cooling air to flow.
Pass it above the receiver tank 35. Therefore, it is possible to prevent overcooling particularly near the receiver tank 35 more reliably.

Further, according to the temperature of the outside air and the like, as shown in FIG. 4, a lid body of an appropriate size is provided on the wall surface at the right end of the soundproof box 21.
By attaching 26, the opening area of the air inlet 23 can be appropriately narrowed. By adjusting the opening area of the air inlet 23 in this manner, the inflow amount of the outside air for cooling can be easily adjusted, and the degree of cooling in the soundproof box 21 can be appropriately adjusted. Aftercooler 38, especially during extremely cold winter months
If the compressed air inside is overcooled, the moisture (drain) condensed by the aftercooler 38 may freeze and block the tube of the aftercooler 38. The drain cock 75 can be prevented from freezing by appropriately blocking a part of the inflow port 23.

Further, the engine radiator 36 and the compressor oil cooler 37 are made into one unit, while the aftercooler 38 is made into another unit by itself, and the engine radiator 36 and the compressor are arranged in the soundproof box 21. Since the oil cooler 37 is arranged at the end opposite to the oil cooler 37, the aftercooler 38 can be easily attached and detached if it is unnecessary depending on the intended use.
That is, at the time of attachment / detachment, it is not necessary to change the mounting relationship with the other engine radiator 36 and the compressor oil cooler 37 as in the conventional case. Further, it is easy to deal with optional specifications, which is advantageous in manufacturing. When the aftercooler 38 is removed, as shown in Fig. 3,
Instead, the air pipe 81 and the consumer side connecting portion 82 may be directly connected by the pipe 86.

The present invention is not limited to the above embodiment, and various modifications can be made. For example,
The compressor main body 33 shown in the drawing is of a double type, but may be of a single type. Moreover, the configuration of the piping and the like is not limited to that of the above-described embodiment.

[0029]

According to the invention of claim 1, the soundproof box is cooled.
The air inlet side of却用, pressure of the air-cooled heat exchanger device
Provided aftercooler for compressed air cooling, from the sound proof box
On the air discharge side for cooling, an oil cooler for the compressor and a radiator for the engine of the air-cooled heat exchange device are installed.
Installation, aftercooler, oil cooler for compressor and
Before mounting on the engine between the engine radiator
Since the discharge fan is arranged, the aftercooler can be easily attached and detached even when it is unnecessary depending on the intended use, which is advantageous in manufacturing.

Further, according to the invention of claim 2, an air inlet communicating with the outside air is provided on the wall surface of the soundproof box facing the aftercooler so as to face the engine radiator.
On the wall of the facing soundproof box, there is an air outlet that communicates with the outside air.
Since there is provided, external air for cooling, immediately after flowing into the soundproof box, by being heated through the aftercooler, when cold, such as winter, the piping and the devices in the soundproof box is supercooled Can be prevented. As a result, it is possible to prevent dew condensation from occurring in the pipes and each device, and thus to prevent problems such as oil or air control.

Further, according to the invention of claim 3, the empty space
Since the opening area adjusting means for adjusting the inflow amount of the outside air is provided at the airflow inlet , the degree of cooling in the soundproof box can be appropriately adjusted.

[Brief description of drawings]

FIG. 1 shows an embodiment of a soundproof air compressor of the present invention, and is a front view of a soundproof box in cross section.

FIG. 2 is a plan view showing a cross section of the above soundproof box.

FIG. 3 is a partial front view showing a state in which the after cooler is removed.

FIG. 4 is a side view showing a state in which the air inlet is covered with a lid.

FIG. 5 is a schematic sectional view showing an example of a conventional soundproof air compressor.

[Explanation of symbols]

21 soundproof box 23 Air inlet (opening) 25 Air outlet (opening) 26 Lid (Opening area adjusting means) 31 Discharge fan 32 engine 33 Compressor body 35 Receiver tank (oil separator) 36 Engine radiator 37 Oil cooler for compressor 38 Aftercooler

Continuation of the front page (56) References JP-A-61-223277 (JP, A) JP-A-1-247789 (JP, A) Actually open 59-105079 (JP, U) Actual-opening 3-23689 (JP , U) Actually open 2-72377 (JP, U) Actually open 53-130512 (JP, U) Actually open 63-126579 (JP, U) Actually open 3-51142 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F04C 29/00-29/10 F04B 39/00-39/16 F02B 63 / 00,63 / 06,77 / 13

Claims (3)

(57) [Claims] 1. A soundproof air compressor in which an air-cooled heat exchange device, an engine equipped with a discharge fan, a compressor body driven by this engine, and a receiver tank are arranged in a soundproof box. , Empty for cooling to the soundproof box
On the air inflow side, compressed air cooling of the air-cooled heat exchange device is used.
A cooling aftercooler is installed to cool the soundproof box.
The air discharge side has a compressor of the air-cooled heat exchange device.
Equipped with an oil cooler for the engine and a radiator for the engine.
Footer coolers, compressor oil coolers and engines
Between the engine radiator and the discharge
Sound proof type air compressor, which is equipped with a fan . 2. An air inlet communicating with the outside air is provided on a wall surface of the soundproof box facing the aftercooler, and the air inlet is provided.
The wall of the soundproof box facing the radiator for gin is protected from outside air.
An air discharge port communicating with the air discharge port is provided .
Soundproof air compressor as described. 3. The soundproof air compressor according to claim 2, wherein the air inlet is provided with opening area adjusting means for adjusting an inflow amount of outside air.