JPH0540382Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention has a first port connected to a negative pressure source, a second port connected to a negative pressure actuator, and a third port connected to the atmosphere. the third negative pressure solenoid valve having
This invention relates to improvements to air filters attached to ports.

[Prior Art] Conventionally, in order to prevent water from entering into an air filter, an air filter such as that disclosed in Japanese Utility Model Publication No. 1-7897 has been devised. The structure of the air filter in this conventional example is such that the housing side is provided with a cylindrical outer peripheral wall and an inner peripheral wall that are parallel to the third port of the solenoid valve, and an air slit is provided in the inner peripheral wall. An air port was provided on the body side at a position displaced in the circumferential direction with respect to the air slit.

[Problems that the invention aims to solve] In conventional air filters, the positional relationship between the body and housing is important for functionality, so the installation direction must be determined before assembling the body and housing, which makes the work difficult. Moreover, since the air slits are provided in the inner circumferential wall of the housing, there is a problem that not only the structure of the housing becomes complicated, but also the size of the housing becomes large, and the air filter also becomes large. .

The present invention not only simplifies the structure of the air filter and makes it more compact, but also eliminates restrictions when assembling the housing and body. Furthermore, the terminal of the solenoid valve, for example, is provided parallel to the third air port. It can also be easily attached to a solenoid valve.

[Means for solving the problem] The structure of the air filter of the present invention includes a housing 1
In this air filter device, the housing 11 includes a cylindrical part 15, a plate part 16 that divides the inside of the cylindrical part into left and right halves, and a right side of the plate part 16. A filter housing part 1 includes an annular recess 21 formed in the shape of a ring and in which the filter 13 is installed.
7, a mounting pipe section 18 formed on the left side of the plate section 16, and a ventilation hole 19 formed near the center of the plate section 16 and communicating the filter storage section 17 and the mounting pipe section 18. , a plurality of drain holes 20a, 20b, etc. provided near the outer periphery of the plate portion 16, and on the other hand, the body 12 has a hole at the left end that is press-fitted into the annular convex portion 21 of the filter storage portion 17. a mounting portion 23 to be fixed; a plurality of air supply ports 24a, 24b, 24c, and 24d protruding radially toward the inner wall of the housing 11 in an intermediate portion;
A bottom plate 26 is provided at the right end portion thereof, and has a plurality of air supply holes 25 on the outer circumferential portion thereof, which are provided out of phase with the air supply ports.
The filter storage section 17 and the air supply port 24a
A communication hole 27 communicating with... is provided, and the air supply port 24a... is provided to the right of this communication hole 27.
A cylindrical baffle plate 28 is provided so as to protrude to approximately the middle position, and by fitting this body 12 from the right side of the housing 11, the filter 13 is fixed at the mounting portion 23, and the inner wall of the housing 11 is fixed. and the bottom plate 26 of the body 12 form an air chamber 29.

[Function] The air filter in this invention has an air chamber 2 formed between the housing 11 and the body 12.
9, and an air supply port 24a formed in the body.
...and the cylindrical cutting board 28 provided inside the air supply port 24a... can eliminate the water droplets that have been sucked in, providing the same waterproofness as conventional products. ing. Further, since the housing is double-walled and air slits are not provided on the inner wall as in the conventional case, the workability of assembling the housing and the body is good.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4.

In FIG. 1, the solenoid valve 1 has a first port 2 for negative pressure input, a second port 3 for negative pressure output, and a third port 4 for introducing atmospheric air, and the solenoid coil 5 is in a de-energized state. At times, the moving core 6 is pressed by the spring force of the spring 7 to block the first port 2 and the third port 4 to communicate with the second port 3. Further, when the electromagnetic coil 5 is energized, the moving core 6 overcomes the spring force of the spring 7 and blocks the third port 4, so that the first port 2 communicates with the second port 3.
Note that 8 is a terminal of the solenoid valve, and 9 is the bottom of the solenoid valve.

The air filter 10 according to the present invention is attached to the third port 4 of the solenoid valve 1, and the third port 4 acts as an air filter mounting port.

The air filter 10 is composed of a resin housing 11 with a mounting pipe section 18, a body 12, and a filter 13.
is attached to.

The resin housing 11 has a cylindrical portion 15, a plate portion 16, a filter housing portion 17, and a mounting pipe portion 18. A ventilation hole 19 is formed in the center of the plate portion 16, and a vent hole 19 is formed near the outer periphery of the plate portion 16. Four drainage holes 20a, 20b, 20c, 20
d are formed at equal intervals. Further, an annular convex portion 21 is formed on the inner wall of the filter housing portion 17, and a plurality of slits 22a, 22b are formed on the outer peripheral portion of the mounting pipe portion 18 along the axis. The mounting pipe portion 18 is adapted to come into contact with the bottom portion 9 of the solenoid valve.

As shown in FIG. 4, the body 12 includes a mounting portion 23 on the left end portion for fixing by press-fitting to an annular convex portion 21 provided on the inner wall of the storage portion 17;
A plurality of air supply ports 24a, 24b, 24c, and 24d are provided on the right side, ie, in the middle, of the housing 11 and project radially toward the inner wall of the housing 11, and on the right end thereof, the air supply ports are out of phase with each other. The bottom plate 26 is provided with a plurality of air supply holes 25 on the outer periphery thereof.

The filter housing section 17 and the air supply ports 24a, 24 are provided at the center of the body 12.
A communication hole 27 is provided that communicates with the air supply ports 24a, 24c, and 24d, and a cylindrical wall plate 28 is provided on the right side of the communication hole 27 so as to protrude to approximately the middle position of the air supply ports 24a. It is provided.

Then, by fitting the body 12 into the housing 11 from the right side, the filter 1 is attached to the mounting part 23.
3 is fixed thereto, and an air chamber 29 is formed by the inner wall of the housing 11 and the bottom plate 26 of the body 12.

Next, the operation of the present invention will be explained.

With the above configuration, water droplets sucked in from the air supply hole 25 formed on the end surface of the body 12 are transferred to the air chamber 2.
9, the speed decreases, and a portion of the water flows down the bottom plate 26 of the body and becomes large water droplets that are discharged from the air supply hole 25 as well as from the drain hole 20 of the housing 11.

Further, from the air chamber 29, the air supply port 24
The water droplets entering a and 24b are blocked by the cylindrical blocking plate 28, and the water droplets entering the air supply port 24 are
Water is discharged from the air supply hole 25 through the bottom plate 26 from a and 24b, and is also discharged from the water drain hole 20 of the housing 11, and water droplets do not enter the filter 13 from the communication port 27 as in the conventional product.

[Effects of the invention] As described above, the air filter of the invention has excellent workability since there is no restriction on the direction of assembly when assembling the housing 11 and the body 12, and also eliminates the need for the housing 11 to be double-walled. Since there is no air filter, the air filter can be made smaller, and therefore, it can be easily installed in items with limited installation space, such as a solenoid valve where the terminal of the solenoid valve is installed parallel to the third air port. can.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional side view of one embodiment of the present invention;
The figures are a sectional view taken along the line A-A in FIG. 1, FIG. 3 is a right side view of the air filter, and FIG. 4 is a longitudinal sectional front view of the body. 1...Solenoid valve, 2...First port, 3...Second
Port, 4...Third port, 5...Electromagnetic coil,
6... Moving core, 7... Spring, 8... Terminal of solenoid valve, 9... Bottom of solenoid valve, 10... Air filter, 11... Resin housing, 12...
Body, 13...Filter, 14...Tube,
15... Cylindrical part, 16... Plate part, 17...
Filter storage section, 18...Mounting pipe section, 19...
...Vent hole, 20a...Drain hole, 21...Annular protrusion, 22a, 22b...Slit, 23...Mounting part, 24a...Air supply port, 25...Air supply hole, 2
6... Bottom plate, 27... Communication hole, 28... Cylindrical board, 29... Air chamber.

Claims (1)

[Claims for Utility Model Registration] In an air filter device in which a filter 13 installed in a housing 11 is held by a body 12, the housing 11 includes a cylindrical portion 15 and a plate portion 16 that divides the inside of the cylindrical portion into left and right halves. ,
a filter storage section 17 formed on the right side of the plate section 16 and provided with an annular recess 21 in which the filter 13 is installed; a mounting pipe section 18 formed on the left side of the plate section 16; A ventilation hole 19 formed near the center of the plate portion 16 and communicating the filter storage portion 17 and the mounting pipe portion 18, and a plurality of drain holes 20a, 20b provided near the outer periphery of the plate portion 16. On the other hand, the body 12 has a mounting part 23 fixed to the annular convex part 21 of the filter storage part 17 by press fitting at the left end part, and a mounting part 23 fixed to the annular convex part 21 of the filter storage part 17 by press fitting, and a mounting part 23 radially toward the inner wall of the housing 11 in the middle part. A plurality of protruding air supply ports 24a, 24b, 24c, and 24d;
A bottom plate 26 is provided at the right end portion thereof, and has a plurality of air supply holes 25 on the outer circumferential portion thereof, which are provided out of phase with the air supply ports.
The filter storage section 17 and the air supply port 24a
A communication hole 27 communicating with... is provided, and the air supply port 24a... is provided to the right of this communication hole 27.
A cylindrical baffle plate 28 is provided so as to protrude to approximately the middle position, and by fitting this body 12 from the right side of the housing 11, the filter 13 is fixed at the mounting portion 23, and the inner wall of the housing 11 is fixed. and a bottom plate 26 of the body 12 to form an air chamber 29.