JPWO2020012534A1 - air compressor - Google Patents

Abstract

It is an object of the present invention to provide an air compressor that can be automatically cleaned by a user without cleaning the air compressor by himself / herself in a light portable air compressor used in an environment with a lot of dust. In order to achieve the above object, it is a light-carrying air compressor equipped with a compressor main body and an air tank, and has a function of blowing compressed air to the compressor main body in conjunction with an operation stop operation.

Description

The present invention relates to an air compressor.

Lightweight air compressors, which are mainly used at construction sites as an air source for nail guns, are often used in various dust environments such as wood chips and gypsum board powder. Therefore, when the user does not clean the air compressor by air blow or the like after the work is completed, dust accumulates in the air compressor, and there is a problem that the performance is lowered due to the filter clogging and the life is shortened due to the temperature rise. In addition, since dust accumulates on the control parts of the air compressor, motors, etc., and then absorbs moisture, there are problems such as failure of electrical parts. Therefore, dust prevention such as covering the inside of the air compressor to prevent dust from entering the inside of the air compressor is provided. Although measures have been taken, if the cover is made more airtight, dust can be prevented from being mixed in, but heat is trapped inside, and there is also a problem of shortening the life, and further improvement is required.

Patent Document 1 is a background technique in this technical field. In the compressor described in Patent Document 1, the compressed air stored in the air tank is taken out through the pressure reducing valve, but in addition to the conventional air circuit used for nailing or the like via a coupler, it is newly pushed to the tip of the pressure reducing valve. A function to clean tools such as nail guns with compressed air taken out from the air circuit is provided, and an air circuit is provided that can take out compressed air for air blow by providing an air duster part of the type and pressing the button of the air duster part. ing.

Japanese Unexamined Patent Publication No. 2014-070583

In Patent Document 1, the operator presses the button of the air duster portion and brings tools contaminated with dust or the like close to the air duster discharge port, so that the compressed air remaining in the tank discharged from the air duster discharge port causes the operator. Tools can be cleaned. That is, the object of cleaning is other tools such as a nail gun connected to the air compressor, and does not clean the air compressor itself. In addition, the operator had to manually discharge the compressed air remaining in the tank for cleaning. As described above, the air compressor described in Patent Document 1 does not consider the point of cleaning the air compressor itself, and further, it has to be performed manually, so that dust is generated when cleaning is not performed. There was a problem of accumulating.

In view of the above background technology and problems, the present invention is, for example, a lightweight air compressor provided with a compressor main body and an air tank, and has a function of blowing compressed air onto the compressor main body.

According to the present invention, since cleaning can be performed automatically, performance can be maintained and products can be protected without bothering the user, leading to improvement in usability for the user.

It is an external view which removed the cover of the light-carrying type tank-integrated air compressor in an Example. It is an external top view of the light transport type tank-integrated air compressor in the Example. It is sectional drawing of the light-carrying type tank-integrated air compressor in an Example. It is a structural drawing of the compressor main body in an Example. It is an external view from the back side of FIG. It is an operation flow diagram of the light-carrying type tank-integrated air compressor in an Example.

Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 is an external view of the light-carrying tank-integrated air compressor in this embodiment with the cover removed. As shown in FIG. 1, the tank-integrated air compressor has a structure in which the compressor main body is mainly arranged on the air tanks 24 and 25. The air taken in through the suction filter 34 arranged at the air intake port for taking in the air to be compressed is compressed by the compressor main body 1 driven by the motor 6 and stored in the air tanks 24 and 25. The tank-integrated air compressor shown in FIG. 1 is a two-stage series type compressor, in which compressed air compressed by the first-stage compressor is compressed by the second-stage compressor to produce high-pressure compressed air. obtain. 35 is a general pressure adjusting handle for adjusting the pressure of the first-stage compressor, 36 is a general pressure air outlet, and 37 is a general pressure pressure gauge. 38 is a high-pressure adjustment handle for adjusting the pressure of the second-stage compressor, 39 is a high-pressure air outlet, and 40 is a high-pressure pressure gauge. Reference numeral 10 denotes a cooling fan, which supplies cooling air to cool the components of the tank-integrated air compressor such as the compressor main body 1, the air tanks 24, and 25.

FIG. 2 is an external view of a light-carrying tank-integrated air compressor in this embodiment. FIG. 2 is a top view of the appearance, in which the compressor body is covered with a cover 26. In addition, the compressor operation unit 29 allows the user to operate the compressor to start or stop the compressor.

FIG. 3 is a cross-sectional view taken along the line AA in FIG. In FIG. 3, the compressor main body 1 has a motor 6 and a compression unit. Reference numeral 30 denotes a control group for controlling the tank-integrated air compressor.

FIG. 4 is a structural diagram of the compressor body in this embodiment. In FIG. 4, reference numeral 1 denotes a compressor body that compresses air. The compressor main body 1 includes a crankcase 1A and a cylinder 18 attached to the crankcase 1A. The shaft (rotating shaft) 6A of the motor 6 penetrates into the crankcase 1A.

Reference numeral 1A is a crankcase that covers the compressor body 1 and the motor 6. The stator 2 is directly fixed to one end side of the crankcase 1A, and the bearing 3 is mounted. The bearing box 5 to which the bearing 4 is mounted is fitted on the side opposite to the mounting side of the stator 2. ing. Further, a key 12 is provided at the center of the shaft 6A penetrating the inside of the crankcase 1A. Further, a connecting rod assembly 14 having a piston ring 13 for sealing and compressing air is inserted together with the balance 17 via an eccentric 16 eccentric with the bearing 15. The connecting rod assembly 14 and the balance 17 are supported from both sides by two bearings 3 and 4 mounted on the crankcase 1A and the bearing box 5.

Reference numeral 6 denotes a motor for driving the compressor main body 1. The motor 6 has a stator 2, a bearing 3, a shaft 6A, a key 7, a rotor 8, and a washer 9, and a cooling fan 10 is provided at an end of the shaft 6A. Further, a rotor 8 is mounted on one end side of the shaft 6A via a key 7. The rotor 8 is axially fixed by a fan shaft 11 for attaching a washer 9 and a cooling fan 10.

Reference numeral 10 denotes a cooling fan for supplying cooling air to the inside of the cover 26 and cooling the components of the tank-integrated air compressor such as the compressor main body 1, the air tanks 24, and 25. The cooling fan 10 is provided at the end of the shaft 6A by the fan shaft 11 and is driven by the motor 6.

Reference numeral 18 denotes a cylinder attached to the crankcase. In this embodiment, two cylinders 18 are provided, and the pair of cylinders 18 are attached so as to face each other with the crankcase in between. The cylinder 18 includes a flange 19, an air valve 20, and a through bolt 22. The crankcase 1A is provided with a flange 19 for attaching the cylinder 18, and the cylinder 18, the air valve 20, and the cylinder head 21 are fixed to the flange 19 by a through bolt 22 to form a compression chamber 23. ..

The operation of the compressor main body 1 in this embodiment will be described. In the compressor body 1 of the present embodiment, when the shaft 6A is rotated by the drive of the rotor 8, the connecting rod assembly 14 and the piston ring 13 reciprocate in the compression chamber 23 by the eccentric 16. In the suction step in which the piston ring 13 moves from the top dead center to the bottom dead center, air is sucked into the compression chamber 23 through the cylinder head 21 and the air valve 20 via the suction filter 34, and conversely, the discharge step toward the top dead center. Then, the structure is such that the sucked air is compressed and discharged through the air valve 20 and the cylinder head 21. The air discharged through the cylinder head 21 is stored in the air tanks 24 and 25.

FIG. 5 is an external view from the back side of FIG. In FIG. 5, the air tank 25 is provided with a solenoid valve 28 via a pressure reducing valve 27. The pressure reducing valve 27 may be either a fixed take-out pressure type or an adjustable type, but a fixed type is preferable. Further, 32 and 33 are pipes connected to the solenoid valve 28. One end of the pipe 32 is fixed to the solenoid valve 28, and the other end is a free end facing the motor direction. Like the pipe 32, the pipe 33 has one end fixed to the solenoid valve 28 and the other end having a free end facing the control group 30 direction.

Next, the operation of the light-carrying tank-integrated air compressor in this embodiment will be described below. FIG. 6 is an operation flow diagram of the light-carrying tank-integrated air compressor in this embodiment.

In FIG. 6, first, in step 1 (S1), the user connects the power cord to the outlet, energizes the air compressor, and then presses the operation switch button of the compressor operation unit 29 (S2) to operate the compressor (S3). , Compressed air is stored in the air tank, and the compressor stops when the pressure of the compressed air reaches a predetermined value, for example, 4.2 MPa (S4). The user starts the work using the compressed air in the air tank (S5). When the pressure of the compressed air drops to a predetermined value using the compressed air in the air tank, the compressor restarts and operates to maintain the predetermined pressure (S6, S7). For example, the compressor is operated until it reaches 3.8 MPa in the powerful mode and 4.2 MPa in the normal mode.

Then, after the work is completed (S8), the user presses the operation stop button of the compressor operation unit 29 (S9) as an operation stop operation to stop the compressor. When the operation stop button of the compressor operation unit 29 is pressed, the control group 30 stops the voltage supply to the motor 6, and the compressor main body 1 is stopped. After stopping the compressor body 1, the control group 30 energizes the normally closed (N / C) solenoid valve 28 and opens the solenoid valve 28. While the solenoid valve 28 is energized, the solenoid valve 28 continues to be open, but the solenoid valve 28 is energized only for a certain period of time (for example, 2 seconds) (S10), and after a certain period of time, the solenoid valve 28 is stopped and the solenoid valve 28 is closed (. S12).

When the solenoid valve 28 is energized, the solenoid valve 28 opens, and the compressed air stored in the air tank 25 is sent to the cleaning pipe 32 and the pipe 33 via the pressure reducing valve 27 and the solenoid valve 28. Since one end of the pipe 32 and the pipe 33 is a free end, compressed air can be blown to the motor 6 and the control group 30 for cleaning (S11). After that, the user unplugs the power cord from the outlet (S13).

Since the light-duty tank-integrated air compressor is often used at construction sites, it is used in a dusty environment such as wood chips and gypsum board powder. After dust accumulates in the control set 30 and the motor 6, moisture is absorbed, which may cause problems such as damage to the substrate due to a short circuit or the like. Therefore, in this embodiment, by using the above-mentioned function, it is possible to prevent a failure by automatically cleaning the control group 30 and the motor 6 in conjunction with the operation stop operation after the user's work is completed.

However, the compressed air contains moisture, and if it is directly blown onto the control group 30 or the motor 6, there is a risk of causing another failure. Therefore, a moisture absorbing member may be inserted between the pressure reducing valve 27 and the solenoid valve 28, and the dehumidified compressed air may be used to clean the control set 30 and the motor 6. In this case, after the cleaning is completed and the solenoid valve 28 is closed, the moisture absorbing member (zeolite or the like) may be heated by the heat of compression at the cylinder portion or the discharge port to dehydrate the moisture absorbing member (zeolite or the like) so that the moisture absorbing member can be absorbed again.

From another point of view, the suction filter 34 may be used to open and clean the solenoid valve. That is, the suction filter is clogged with dust, so that the temperature inside the crankcase rises and the performance of the compressor deteriorates. Automatic cleaning prevents performance degradation due to filter clogging. Further, when cleaning the filter, wind may be blown to the filter from the outside of the crankcase, or wind may be blown from the inside of the crankcase.

Normally, the compressed air remaining in the air tank was manually discharged before the power cord was unplugged from the outlet, but the solenoid valve 28 was opened (triggered by pressing the operation stop button (S9)). After S10), cleaning (S11), and closing the solenoid valve 28 (S12), the operation of automatically removing all the compressed air may be performed for a predetermined time, for example, 2 minutes.

In addition, the operation of performing cleaning triggered by pressing the above-mentioned operation stop button may be set to ON / OFF in advance as a cleaning mode, or the above-mentioned operation of automatically removing all compressed air may be performed. The user may be able to select ON / OFF in advance as the compressed air automatic full removal mode.

As described above, according to the present embodiment, the user can automatically clean the part of the product that should be particularly cleaned without cleaning the compressor by himself / herself after the work is completed. Performance can be maintained and products can be protected without bothering the user, leading to improved usability for the user.

Although the examples have been described above, the present invention is not limited to the above-mentioned examples, and various modifications are included. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations.

1: Compressor body 2: Stator, 3, 4: Bearing, 5: Bearing box, 6: Motor, 6A: Shaft, 10: Cooling fan, 13: Piping ring, 14: Connecting rod set, 16: Eccentric, 18 : Cylinder, 20: Air valve, 21: Cylinder head, 24, 25: Air tank, 26: Cover, 27: Pressure reducing valve, 28: Electromagnetic valve, 29: Compressor operating unit, 30: Control group, 32, 33: Piping, 34: Suction filter, 35: General pressure adjustment handle, 36: General pressure air outlet, 37: General pressure pressure gauge, 38: High pressure adjustment handle, 39: High pressure air outlet, 40: High pressure pressure gauge

Claims (7)

A light-weight air compressor equipped with a compressor body and an air tank.
An air compressor characterized by having a function of blowing compressed air onto the compressor body. The air compressor according to claim 1.
The motor that drives the compressor body and
The control set that controls the air compressor and
It has a suction filter located at the air intake that takes in the air to be compressed.
An air compressor characterized by blowing the compressed air onto the control set, the motor, and the suction filter. The air compressor according to claim 1.
Equipped with an air tank for storing the compressed air
An air compressor characterized in that the compressed air to be blown is supplied from the air tank. The air compressor according to claim 1.
An air compressor characterized in that the spraying is automatically performed in conjunction with an operation of stopping the operation of the air compressor. The air compressor according to claim 1.
An air compressor characterized in that the outlet for blowing compressed air is provided with a solenoid valve, and air decompressed by the pressure reducing valve is supplied to the solenoid valve. The air compressor according to claim 5.
An air compressor having a moisture absorbing function between the pressure reducing valve and the solenoid valve, and the blowing is characterized in that dehumidified air is blown. The air compressor according to claim 3.
The air tank is provided with a solenoid valve via a pressure reducing valve.
It has a pipe connected to the solenoid valve and has
One end of the pipe is fixed to the solenoid valve, and the other end is a free end facing the compressor body.
Air compression characterized in that compressed air supplied from the air tank is blown from the free end of the pipe to the compressor main body by opening the solenoid valve in conjunction with the operation of stopping the operation of the air compressor. Machine.

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