JP2560892Y2 - Automatic drainage device for air filter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically discharging water accumulated in a bowl of an air filter.

[0002]

2. Description of the Related Art First, the structure and operation of an air filter will be described with reference to FIG. 1 showing an embodiment of the present invention. On the lower surface of the body 1 having an air inlet 2 and an air outlet 3 formed on both sides, a bowl a containing a filter assembly 4 in which a cylindrical filter element 5 is assembled is mounted. From the filter element 5, the air passes through the louver 6 provided in the annular space between the bowl a and the filter element 5 to be sent to the outside of the filter element 5 as a unidirectional swirling flow, and is mixed into the air. The water is separated by centrifugal force, and after the water from which the water has been removed enters the inside of the filter element 5, flows out of the outlet 3 through the passage 8 provided in the stud 7. The fluid flows through a through hole 10 provided in the outer peripheral edge of a baffle 9 at the lower end of the filter assembly 4 to the bottom side of the bowl a so as to be stored.

Conventionally, as an automatic drainage device for such an air filter, the one shown in FIG. 2 is known. In this apparatus, a sheet c having a drain port d is screwed to a lower end side of a through hole b formed in the bottom surface of a bowl a, and a valve rod e having a pressure receiving plate f at an upper end is provided above the sheet c. While the air is flowing into the bowl a, the air pressure is received by the pressure receiving plate f, the valve rod e moves down, and the lower end is pressed against the upper surface of the seat c. When the inflow of air is stopped and the inside of the bowl a is opened to the atmosphere, the residual pressure acts on the lower surface side of the pressure receiving plate f, thereby lifting the valve rod e, and the drain port d is closed. When opened, the water accumulated in the bowl a is discharged.

[0004]

When the drainage operation is manually performed in the above-described conventional apparatus, the seat c is moved down while loosening the screw. Move downward together, so that the descending of the valve rod e is stopped by engaging the enlarged diameter step g provided in the middle of the valve rod e with the rim of the through hole b of the bowl a. The drain port d is opened to enable drainage, that is, it is necessary to loosen the screw of the sheet c a considerable amount and move it down before opening the drain port d.
Further improvement has been desired to facilitate manual drainage.

[0005]

The automatic drain device for an air filter according to the present invention has been devised based on such a demand, and a drain port is provided through a through hole formed in a bottom surface of a bowl. The lower end of the valve rod, which is provided with a pressure receiving plate at the upper end at the upper end of the drain port of the sheet and formed with an enlarged diameter portion that abuts on the upper edge of the drain port on the way, is fitted to the drain port of the drain port. It was configured to be loosely fitted by protruding from the lower end.

[0006]

While the air is flowing, the valve rod is urged downward by receiving the air pressure on the upper surface of the pressure receiving plate, and the enlarged portion provided in the middle of the valve rod is located above the drain port of the seat. The drain outlet is closed by being pressed against the rim of
Moisture is collected on the bottom of the bowl.

When the inflow of air is stopped and the inside of the bowl is opened to the atmosphere, residual pressure acts on the lower surface side of the pressure receiving plate, whereby the valve rod is lifted and the enlarged diameter portion is formed on the upper edge of the drain port. , The drainage port is opened, and the water accumulated in the bowl is automatically discharged through a gap between the outer periphery of the lower end of the valve rod and the inner periphery of the drainage port.

Further, since the lower end of the valve rod projects from the lower end of the drain port, the drain port is immediately opened by pushing up the lower end of the valve rod with a finger or the like, so that manual drainage can be easily performed. Will be

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. In the present embodiment, a sheet 13 made of a polyurethane resin having a drainage port 14 formed in the center thereof is provided in a through-hole 12 formed in the center of the bottom surface of the bowl 11, and a flange 15 formed at the upper end thereof is formed in the through-hole 12. The hose is engaged with the upper edge, and the hose mounting portion 16 provided at the lower end is protruded toward the lower surface of the bowl 11 so as to be tightly fitted.

The valve rod 18 is formed of a polyethylene resin. The lower end of the valve rod 18 is fitted with a clearance into the drain port 14 of the seat 13 and has a dimension longer than the drain port 14. Is formed at the upper end of the reduced-diameter portion 19, and an enlarged-diameter step 21 that can abut the upper edge of the drain port 14 is formed.

A flange-shaped pressure receiving plate 23 is provided on the upper end of the valve rod 18.
Are formed. The upper surface of the pressure receiving plate 23 is formed as a gentle convex arc surface, and the outer periphery thereof has
A skirt 24 is formed that spreads obliquely downward and has a very small thickness at the tip end so as to be easily bent, and the outer peripheral edge of the skirt 24 is in contact with the inner periphery of the bowl 11.

The reduced diameter portion 19 of the valve rod 18 is
Is fitted in the drain port 14 with its lower end protruding from the lower end of the drain port 14.

Next, the operation of this embodiment will be described. While the air is flowing into the bowl 11 and the water is being separated, the valve rod 18 is urged downward by receiving the air pressure on the upper surface of the pressure receiving plate 23, and the diameter expansion provided in the middle is performed. When the step 21 is pressed against the upper edge of the drain port 14 of the sheet 13, the drain port 14 is closed, and the removed moisture causes the outer edge of the skirt portion 24 of the pressure receiving plate 23 to bend while the bowl 11 is bent. Flows to the bottom surface along the inner peripheral surface of the container and is stored.

Since the upper surface of the pressure receiving plate 23 is formed in an arc shape, the water dropped on the pressure receiving plate 23 hangs down to the outer peripheral side without collecting there, and flows to the bottom side of the bowl 11.

When the inflow of air is stopped and the inside of the bowl 11 is opened to the atmosphere, residual pressure acts on the lower surface of the pressure receiving plate 23, and the valve rod 18 is lifted as shown by a chain line. At that time, the thin skirt 2 of the pressure receiving plate 23
The outer peripheral edge of the tube 4 spreads due to the residual pressure and closely adheres to the inner periphery of the bowl 11, and the residual pressure is effectively applied without air leakage, so that the valve rod 18 reliably moves upward.

As a result, the enlarged diameter step portion 21 of the valve rod 18 is separated from the upper edge of the drain port 14 and the drain port 14 is opened, and the outer periphery of the reduced diameter portion 19 of the valve rod 18 and the drain port 14 are opened. Moisture accumulated on the bottom surface of the bowl 11 through the gap between the inner periphery and the inner periphery is automatically discharged.

Since the lower end of the valve rod 18 is fitted so as to protrude from the lower end of the drain port 14, the lower end of the valve rod 18 is immediately pushed up by a finger or the like as shown by an arrow, so that the drain port 14 is immediately opened. Is opened and manual drainage is easily performed.

[0018]

[Effects of the Invention] As described above, according to the present invention, not only automatic drainage is performed well, but also manual drainage can be easily and quickly performed only by pushing up the lower end of the valve rod. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a partial sectional view of a conventional example.

[Explanation of symbols]

1: Body 2: Inlet 3: Outlet 5: Filter element 11: Bowl 12: Through hole 13: Sheet
14: Drain port 18: Valve rod 19: Reduced diameter part 21: Expanded diameter part 23: Pressure receiving plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A bowl accommodating a cylindrical filter element is mounted on a lower surface of a body having an inlet and an outlet formed therein, and air flowing from the inlet is swirled into an annular space outside the filter element. The water mixed in the air is separated by centrifugal force by sending it as a flow, and the air from which the water is removed flows through the inside of the filter element and flows out from the outlet, and the removed water is put into the bowl. An apparatus for automatically discharging moisture accumulated in the bowl of an air filter configured to accumulate, wherein a sheet having a drain port formed through a through hole formed in a bottom surface of the bowl is closely fitted, and The lower end of the valve rod, which is provided with a pressure receiving plate at the upper end at the upper end thereof and has an enlarged diameter portion which abuts on the upper rim of the upper end of the drainage port, protrudes from the lower end of the drainage port. Automatic drainage device for an air filter, characterized in that the loosely fitted.