JP2566430Y2 - Dryer-built-in gas filter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas filter with a built-in drier, for example, for separating water, oil, fine particles, etc. mixed in air compressed by an air compressor to easily obtain clean air. A gas filter structure.

[0002]

2. Description of the Related Art FIG.
And what is shown in FIG. 3 is known. To explain the conventional example more specifically, in FIG. 2, an inflow port 3 is provided at an upper part of a first cylindrical body 2 in which a cooling medium 1 made of stainless steel is installed, and a lower part of the cylindrical body 2 is formed of a gas-liquid separation chamber 4. A drain 5 is provided at the bottom of the gas-liquid separation chamber 4, and an upper surface of the gas separation chamber 4 and a lower part of the second cylinder 6 are communicated with each other. A moisture absorber 7 made of fiber is provided inside, and an outlet 8 is provided above the second cylindrical body 6.

However, with the above filter structure,
When precise filtration is required due to low filter removal efficiency, as shown in FIG. 3, a precision filter 10 is separately provided in the middle of the pipe 9 provided at the outlet 8 to perform precision filtration of gas. Is usually the case.

[0004]

According to the conventional example, since the first cylindrical body 2 and the second cylindrical body 6 are provided in a double-cylinder type, there is a problem that the whole becomes large. In addition, since filtration is performed by the cooling medium 1 made of stainless steel fiber and the hygroscopic body 7 made of polymer fiber, when water, oil, fine particles, and the like mixed in the air compressed by the air compressor are separated, the removal efficiency is extremely high. Therefore, a precision filter must be provided on the secondary pipe separately from this filter, which not only complicates piping work but also causes an increase in cost.

The present invention has been developed in order to solve the above-mentioned problems of the conventional gas filter, and achieves miniaturization by storing a plurality of functions in the same container. , And cost reduction,
It is another object of the present invention to efficiently remove fine particles and microorganisms in addition to fine water droplets and oil droplets.

[0006]

Means for Solving the Problems] To achieve the above object, the present invention may have a outlet of the inlet of the raw gas and clean gas
A discharge port for discharging the condensed liquid to the bottom of the container to be provided, this
The outer cylinder and the inner cylinder are provided concentrically inside the container of
A chamber and an inner peripheral chamber are defined, and the outer peripheral chamber communicates with the inflow port.
A cooling medium is stored in the primary side to condense the vapor mixed in the gas.
The inner peripheral chamber has a secondary
A gas filter with a built-in drier containing a hollow fiber membrane which is a hydrophobic polymer porous thin film on the side .

The cooling medium is preferably a substantially porous or network structure such as an inorganic fiber or a sintered inorganic powder.

[0008]

The gas filter according to the present invention is constructed as described above, so that the raw gas flows from the inlet provided at the upper part of the container, descends the outer peripheral chamber of the outer cylinder, and comes into contact with the cooling medium in the outer peripheral chamber. Condensed by the water at the bottom of the container,
The oil is separated, and then the gas rises in the inner peripheral chamber of the inner cylinder, and the precision filter in the inner peripheral chamber finally captures unseparated fine water droplets, oil droplets, fine particles and microorganisms, and purifies the purified gas. It flows out from the outlet provided at the top of the container and supplies clean dry air.

[0009]

FIG. 1 shows an embodiment of a gas filter with a built-in dryer according to the present invention. Specifically, FIG. 1 shows an example in which air compressed by an air compressor is filtered into clean air. Things. Container 11 is
It comprises an outer cylinder 12, an inner cylinder 17, a head cap 13, and a bottom cap 19. A head cap 13 is screwed onto an upper portion of the outer cylinder 12 via an O-ring 18, and a bottom cap 19 is attached to a lower portion of the head cap 13 by an O-ring 20.
Screwed through. The head cap 13 is formed with an inlet 14 through which raw compressed air compressed by the air compressor flows in and an outlet 15 through which clean air flows out,
A protruding cylindrical portion 16 communicating with the outlet 15 is provided, and the upper end of the inner cylinder 17 is fixed to the protruding cylindrical portion 16.

The outer cylinder 12 and the inner cylinder 17 are arranged concentrically to form an outer peripheral chamber 12a and an inner peripheral chamber 17a. The outer peripheral chamber 12a is provided with a metal fiber such as a stainless steel fiber, an inorganic fiber, or the like. Accommodates a cooling medium 22 that is a porous or network structure formed of an inorganic powder sintered body or the like, and accommodates the inner peripheral chamber 17.
In a, a precision filter 23 made of a hydrophobic polymer porous thin film which is a hollow fiber is stored. Further, a gas-liquid separation chamber 19a is provided inside the bottom cap 19, and the gas-liquid separation chamber 19a
The water and oil condensed in the step are separated and discharged from the drain 21.

As the above-mentioned hydrophobic polymer film, a fine porous film made of a polyolefin resin such as polypropylene or polyethylene or a fluorine resin such as polytetrafluoroethylene is used. This microporous membrane allows gas and water vapor to pass through, but does not allow water to pass through, and has extremely high filtration accuracy. Further, it is preferable to provide an orifice in a part 14a of the inflow port 14.

Next, the operation of the above embodiment will be described. The raw compressed air compressed by the air compressor is
Flows down from the inflow port 14 provided at the upper part of the cylinder while being diffused into the circular outer peripheral chamber 12a provided between the outer cylinder 12 and the inner cylinder 17, in this case, water and oil components mixed in the compressed air Is vaporized by the heat generated during compression, but comes into contact with a cooling medium 22 such as a stainless steel fiber in the outer peripheral chamber 12a to be condensed by cooling or adiabatic expansion to be converted from vapor into liquid droplets. Gas-liquid separation chamber 19a
At this time, moisture and oil are separated, and then the slightly compressed air rises in the inner peripheral chamber 17a of the inner cylinder 17, and
The fine filter of the hollow fiber membrane 23 in (a) finally captures unseparated fine water droplets, oil droplets, fine particles and microorganisms, and purifies the air from the outlet 15 provided in the upper part of the container 11. Supply clean, dry air. In the gas-liquid separation chamber 19a, moisture and oil are discharged from a drain 21 provided in the bottom cap 19. In the above example, the case where the air compressed by the air compressor is purified has been described. However, the present invention is not limited to this example, and it is needless to say that the present invention can also be used for a case where other raw gas is converted into a clean gas.

[0013]

[Effects of the Invention] The gas filter of the present invention has the following excellent effects. That is, by storing a plurality of functions in the same container, the product can be downsized, the cost can be reduced, and the economy is excellent. Furthermore, in addition to fine water droplets and oil droplets that cannot be removed by a conventional simple air dryer, there is an effect that fine particles and microorganisms can be removed with high efficiency.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a gas filter according to the present invention.

FIG. 2 is a longitudinal sectional view showing a conventional filter.

FIG. 3 is an explanatory view of a conventional example in which a separate precision filter is provided in the conventional filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Container 12 Outer cylinder 12a Outer peripheral chamber 14 Inflow port 15 Outlet 17 Inner cylinder 17a Inner peripheral chamber 22 Cooling medium 23 Precision filter

Claims (2)

(57) [Scope of request for utility model registration] 1. A have the outlet of the inlet of the raw gas and clean gas
A discharge port for discharging the condensed liquid to the bottom of the container to be provided, this
The outer cylinder and the inner cylinder are provided concentrically inside the container of
A chamber and an inner peripheral chamber are defined, and the outer peripheral chamber communicates with the inflow port.
A cooling medium is stored in the primary side to condense the vapor mixed in the gas.
The inner peripheral chamber has a secondary
A gas filter with a built-in dryer , wherein a hollow fiber membrane which is a hydrophobic polymer porous thin film is housed on the side . 2. The cooling medium is inorganic fiber or inorganic powder sintered.
It is characterized by being substantially porous or a network structure such as a body.
The dryer-incorporated gas fill according to claim 1, characterized in that:
Ta.