JP2002115661A - Air recycle system of compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air recycle system of equipment provided with a compressor. SOLUTION: The air recycle system 10 of the compressor 3 is provided with a suction part 2 for sucking air A from the outside through an air filter 1, a first flow passage 4 for feeding the air sucked from the suction part 2 into a suction port 3a of the compressor 3, a check valve 5 arranged in the first flow passage 4, a second flow passage 6 for feeding pressurized air PA outputted from the compressor 3 into an air cylinder 7 as a pneumatic pressure driving part of equipment through an air drier 11, a third flow passage 8 for joining exhaust air EA of the air cylinder 7 with the air A sucked from the suction part 2 and refluxing the air into a suction port 2a of the compressor 2, and a relief valve 9 arranged on the halfway of the third flow passage 8 and opened when a pressure of the exhaust air EA of the cylinder 7 exceeds a predetermined pressure to stabilize the exhaust air pressure. The exhaust air EA after working in the pneumatic pressure driving part (air cylinder 7) of the equipment is not exhausted to the outside and is circulated into the compressor 3 in the third flow passage 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air recycling system for various kinds of equipment having a pneumatic drive unit driven by utilizing a compressed air as a component of a compressor.

[0002]

2. Description of the Related Art A compressor (compressor) is an essential component of various devices that operate using pressurized air. Conventionally, a compressor outputs pressurized air to an air cylinder or other pneumatic actuator. After being used in the pneumatic drive, it was only exhausted to the outside.
That is, pressurized air generated by the compressor (which is also one energy resource) has been discarded after being used.

[0003] In this regard, Japanese Patent Laid-Open Publication No. 8-14190 discloses a pressurized air supply device in which air from which unnecessary components have been removed by air recycling is reused to supply pressurized air with a high degree of cleanliness and relief. Valve (relief valve)
There has been proposed a device configured to eliminate exhaust noise from a vehicle.

[0004] That is, "a suction portion for sucking air from the outside, a compressor for pressurizing and discharging the air sucked from the suction portion, and an unnecessary component for removing unnecessary components from the compressed air discharged from the compressor." A pressure regulating unit comprising a removing unit, a relief valve for leaking a part of the pressurized air when the pressure of the pressurized air from which the unnecessary components have been removed by the unnecessary component removing unit is equal to or higher than a predetermined set value; An output section for supplying pressurized air regulated by the pressure section to a load, and pressurized air leaked from a relief valve of the pressure regulation section and from which unnecessary components have been removed is returned to the suction section, and is returned to the outside. And an air recycle channel for re-intake by the compressor after being merged with the intake air from the compressor. "

[0005]

However, the above-mentioned pressurized air supply device is intended to recycle air inside the pressurized air supply device itself which sends pressurized air to the pneumatic drive unit. That is, surplus air (pressurized air that has not yet been output from the output unit) exhausted by the relief valve in the pressure adjustment unit is returned to the suction unit for recycling. It does not reuse the exhaust air that has been used and consumed by the department.

In general, recycling in the original sense is to reuse used waste (waste) as a resource, and the above-mentioned pressurized air supply device does not realize pure air recycling. At present, there is no air recycling system after the compressed air generated by the compressor is used by the pneumatic actuator.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and uses pressurized air having various compressors as components for a pneumatic drive unit (such as a pneumatic actuator that performs work using pressurized air). In order to improve the efficiency by realizing air recycling of equipment that sends and uses it as one drive source (for example, as an example, an automatic wrapping machine that uses a pneumatic cylinder to open and close a plastic bag filled with powder or granular products) The purpose is to provide a system.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides: (1) a suction portion for sucking air from outside through an air filter, and a suction port of a compressor for sucking air sucked from the suction portion. A first flow path for sending air to the first flow path, a check valve disposed in the first flow path, a second flow path for sending pressurized air output from the compressor to a pneumatic drive unit, and the pneumatic drive A third flow path for merging the exhaust air of the section with the air sucked from the suction section and returning to a suction port of the compressor; and an exhaust air of a pneumatic drive section provided in the middle of the third flow path. And a relief valve that opens when the pressure exceeds a predetermined pressure and opens to the outside to stabilize exhaust pressure, thereby providing an air recycling system for a compressor. (2) In particular, the present invention provides an air recycling system for a compressor, wherein the pneumatic drive unit is an air cylinder.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a compressor air recycling system according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a system configuration diagram for explaining air recycling of a compressor according to the present invention.

In FIG. 1, an air recycling system 10 of a compressor 3 is provided with an air filter 1 for filtering air A from outside.
, A first flow path 4 for sending air drawn from the suction section 2 to a suction port 3 a of the compressor 3, and a check valve 5 disposed in the first flow path 4. When,
A second flow path 6 for sending a pressurized air PA output from the compressor 3 to an air cylinder 7 which is a typical example of a pneumatic actuator as a pneumatic drive unit of a device via an air dryer (drainage) 11; 7, a third flow path 8 that joins the discharged air EA with the air A drawn from the suction section 2 and returns to the suction port 2a of the compressor 2, and is disposed in the middle of the third flow path 8. And a relief valve 9 which opens when the exhaust air EA of the air cylinder 7 becomes equal to or higher than a predetermined pressure and stabilizes the exhaust pressure.
It is characterized in that the discharged air EA after work in the pneumatic drive unit (air cylinder 7) of the device is returned to the compressor 3 through the third flow path 8 without being discarded to the outside. That is, the system realizes air recycling after use. The check valve 5 is provided to prevent the exhaust air EA from flowing back to the suction section 2. The check valve 5 is provided with the first flow path 4, the second flow path 6, and the third flow path 6. Flow path 8 is formed of a rubber hose, a vinyl hose, or a metal tube.

Although the conventional compressor draws air lower than the atmospheric pressure, the air recycling system 10
When the exhaust air EA is reused as described above, since the exhaust air EA has a relatively high pressure, the amount of intake air of the compressor 3 increases, and as a result, the intake efficiency of the compressor 3 improves.

As can be seen from FIG.
Since the exhaust air EA is returned between the air filter 1 and the suction section 2, the amount of air A from the outside passing through the air filter 1 is reduced.

The air recycling system 10 as described above
Are applicable to all devices having a process in which a pneumatic actuator or the like of a pneumatic drive unit operates (does work) using the compressor 3 as a component and the pressurized air PA as a drive source. There are many examples, but typical examples of the application are automatic packaging machines and air brakes.

An automatic packaging machine is an apparatus for automatically filling a certain amount of powdered product or granular product in a plastic bag or the like for packaging.
This plastic bag or the like is in a folded state at the beginning and has to be greatly opened just before filling. However, in the opening and closing process of the plastic bag and the like, pressurized air generated by a compressor is guided by a hose to form an air cylinder 7. Drive and go.

The air brake uses a pneumatic actuator such as an air cylinder for a force applied to a friction brake such as a band brake, and is frequently used for various devices. By applying the air recycling system of the present invention to these devices, the overall energy consumption efficiency is improved.

The air recycling system 10 described above is also effective for other machine tools and the like. In particular, when the air cylinder 7 for converting pneumatic energy into linear motion is provided as a pneumatic drive unit of the apparatus, the discharged air EA is used as it is. This is effective because it is easy to collect without leading to the outside and guide it to the third flow path 8.

[0018]

As described above, the air recycling system for a compressor according to the present invention is configured so that the compressed air generated by the compressor is used in the pneumatic drive unit and then the discharged air is reused. Has the effects as described in

(1) The suction efficiency of the compressor increases, and the capacity of the compressor increases.

(2) The life of the air filter is extended and the maintenance cost is reduced.

(3) The exhaust noise is reduced because the air is not exhausted from the pneumatic drive unit of the equipment having the compressor as a component.

[0022]

[Brief description of the drawings]

FIG. 1 is a system configuration diagram for explaining a compressor air recycling system according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 air filter 2 suction section 3 compressor 3a suction port 4 first flow path 5 check valve 6 second flow path 7 air cylinder 8 third flow path 9 relief valve 10 air recycling system 11 air dryer A air PA pressurization Air EA Exhausted air

Claims (2)

[Claims] 1. A suction section for sucking air from outside through an air filter, a first flow path for sending air sucked from the suction section to a suction port of a compressor, and a first flow path disposed in the first flow path. A non-return valve, a second flow path for sending pressurized air output from the compressor to a pneumatic drive unit, and combining the exhaust air of the pneumatic drive unit with air sucked from the suction unit to form the compressor. 3rd returning to the inlet of the
And a relief valve disposed in the middle of the third flow path, which is opened when the exhaust air of the pneumatic drive unit reaches a predetermined pressure or more and opened to the outside to stabilize the exhaust pressure. Compressor air recycling system. 2. The air recycling system for a compressor according to claim 1, wherein the air pressure drive unit is an air cylinder.