JPH04317713A - Dust collector with high performance exhaust filter - Google Patents

Abstract

PURPOSE:To prevent air in a dust collector from leaking to an outer area by providing a suction blower, and a dust collection filter between an opening for dust collection and an air suction orifice of an enclosure for the dust collector so that the air passes through the suction orifice opened on the enclosure. CONSTITUTION:The periphery at an upper exhaust side of a high performance exhaust filter 8 is airtightly fixed to the upper surface of a top cover 6 through a packing 9. Space 14 in the top cover 6 is isolated from a space 15 which passes through the exhaust orifice 7 of a suction blower 4 and the suction side of the high performance exhaust filter 8 with a rubber sleeve 12. In addition, the space 14 in the top cover 6 communicates with the interior of the enclosure 1 via a through hole so that the internal pressure of the space 14 remains negative constantly. Subsequently, although there is the possibility that air might enter into the space 14 in the top cover 6 from atmosphere, the air will no longer leak into the atmosphere from the space 14 in the top cover 6 through a hole for installing a cord 10 or a seal for the packing 9. Further, the high performance exhaust filter 8 can be mounted while easily maintaining its airtightness.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collector with a high performance exhaust filter.

0002

2. Description of the Related Art FIG. 3 shows a conventional dust collector with a high-performance exhaust filter used in clean rules, etc., in which 1 is an outer box of the dust collector, 2 is an opening for collecting dust provided on the lower side of the outer box 1,
3 is the intake port also located in the center of the upper part, 4 is this intake port 3
5 is a dust collection filter disposed between the dust collection opening 2 and the intake port 3; 6 is an upper cover provided on the top of the outer casing 1; 7 is the suction blower 4; 8 is a high-performance exhaust filter such as a ULPA filter, the outer periphery of which is airtightly attached to the upper cover 6 through a packing 9 so that its intake side communicates with the exhaust port 7; 10 is a high-performance exhaust filter such as a ULPA filter; A power cord 11 is provided through the cover 6, and a power switch 11 is attached to the upper cover 6.

In such a dust collector with a high-performance exhaust filter, the air sucked through the dust collection opening 2 by the suction blower 4 is passed through the dust collection filter 5 and the suction blower 4.
The exhaust gas reaches a high-performance exhaust filter 8 through an exhaust port 7, where dust particles on the order of μm are adsorbed and then discharged to the outside.

FIG. 4 shows a conventional dust collector with a high-performance exhaust filter that uses a doughnut-shaped filter 16 as the high-performance exhaust filter 8 in FIG. An intermediate portion of the lower surface on the intake side is airtightly fixed to the upper surface of the upper cover 6 via a packing 9.

[0005]

[Problem to be solved by the invention] However, in such a conventional dust collector with a high-performance exhaust filter, the power cord 1
There are many holes such as a hole through which the power switch 11 passes through the cover 6, a hole for attaching the power switch 11 to the upper cover 6, and a packing attachment hole. However, since the space 14 inside the upper cover 6 communicates with the exhaust hole 7 of the suction blower 4 and is under high pressure, the suction air leaks directly to the outside through the hole without passing through the high-performance exhaust filters 8 and 16. There was a risk that the particles would come out and contaminate the surrounding clean space and adversely affect manufacturing.

[0006] Furthermore, if the airtightness between the upper cover 6 and the high-performance exhaust filters 8 and 16 by the packing 9 is not perfect,
There was a risk that the air inside the upper cover 6 would leak outside through the packing 9.

[0007] In order to prevent such leakage, it is possible to completely seal the above-mentioned hole and to complete the seal with the packing 9, but this is extremely difficult in terms of structure and cost, and the external environment is Determining whether or not there is contamination due to leakage requires a special measuring device such as a particle counter, and the measurement also takes time.

The present invention is intended to eliminate these drawbacks.

[0009]

[Means for Solving the Problems] The dust collector with a high-performance exhaust filter of the present invention includes a dust collector outer casing, a dust collection opening and an intake port provided in the outer casing, and a suction port that communicates with the intake port. A suction blower attached to the dust collector outer casing, a dust collection filter placed between the dust collection opening and the intake port of the outer casing, a high-performance exhaust filter, and one end of the high-performance exhaust filter on the exhaust side connected to the outer casing. a cover provided on the outer casing for airtight support via a sealing mechanism, a mechanism for airtightly communicating the other end of the high-performance exhaust filter on the intake side with the exhaust port of the suction blower, and the cover. It is characterized by comprising a through hole for a power cord or a power switch, and a through hole formed in a portion of the outer casing facing the space surrounded by the cover.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be explained below with reference to the drawings.

In the present invention, as shown in FIG. 1, the outer periphery of the upper exhaust side of the high-performance exhaust filter 8 is hermetically fixed to the upper surface of the upper cover 6 via a packing 9, and the lower intake side of the high-performance exhaust filter 8 is The upper end of the cylindrical rubber sleeve 12 is airtightly closed on the outer periphery of the side.
The lower end of the upper cover 6 can be hermetically closed to the outer periphery of the exhaust port 7 of the suction blower 4, and a through hole 13 is provided in the upper surface of the outer case 1 to allow the inside of the upper cover 6 to communicate with the inside of the outer case 1.

Since the dust collector with a high-performance exhaust filter of the present invention has the above-described structure, the space 14 in the upper cover 6
are the exhaust port 7 of the suction blower 4 and the high-performance exhaust filter 8
The space 14 inside the upper cover 6 is separated from the space 15 communicating with the intake side by the rubber sleeve 12, and is also communicated with the inside of the outer casing 1 through the through hole 13, so that it is always under negative pressure. Although there is a possibility that air may enter from the outside, there is no risk of air leaking out from the space 14 in the upper cover 6 through the attachment hole of the cord 10 or the seal of the packing 9, eliminating the above drawbacks. can do.

FIG. 2 shows another embodiment of the present invention in which a doughnut-shaped high-performance exhaust filter 16 is used in place of the high-performance exhaust filter 8 in the first embodiment. The lower surface of the outer circumferential exhaust side of the donut-shaped high-performance exhaust filter 16 is airtightly supported on the upper surface of the upper cover 6 via the packing 9, and a cylindrical sleeve 17 is attached to the outer circumference of the suction blower 4 on the exhaust port 7 side. The lower end is airtightly fixed, and the packing 18 is secured by the upper end.
The lower surface of the inner peripheral intake side of the high-performance exhaust filter 16 is airtightly supported through the casing 1, and a through hole 13 is provided in the upper surface of the outer casing 1 to allow the inside of the upper cover 6 to communicate with the inside of the outer casing 1.

In this embodiment of the invention, the space 14 in the upper cover 6 is separated from the space 15 communicating the exhaust port 7 of the suction blower 4 with the intake side of the high-performance exhaust filter 8 by a cylindrical sleeve 17 and a packing 18. At the same time,
Since the inside of the outer casing 1 is communicated with through the through hole 13 and the pressure is always negative, there is a possibility that air may enter the space 14 inside the upper cover 6 from the outside. There is no risk of leakage, and the above drawbacks can be eliminated.

[0015]

Effects of the Invention As described above, according to the dust collector with a high-performance exhaust filter of the present invention, the air inside the dust collector is increased through the power cord through hole, power switch mounting part, etc., and the sealing surface of the filter mounting packing. There are great benefits such as being able to prevent leakage to the outside without passing through the high-performance exhaust filter, and also making it easier to install the high-performance exhaust filter in terms of airtightness than before.

[Brief explanation of drawings]

FIG. 1 is an explanatory cross-sectional view of a dust collector with a high-performance exhaust filter according to the present invention.

FIG. 2 is an explanatory cross-sectional view of another embodiment of the present invention.

FIG. 3 is an explanatory cross-sectional view of a conventional dust collector with a high-performance exhaust filter.

FIG. 4 is an explanatory diagram of another conventional dust collector with a high performance exhaust filter.

[Explanation of symbols]

1 Dust collector outer box 2 Opening 3 Intake port 4 Suction blower 5 Dust collection filter 6 Upper cover 7 Exhaust port 8 Exhaust filter 9 Packing 10 Power cord 11 Power switch 12 Rubber sleeve 13 Through hole 14 Space 15 Space 16 Exhaust filter 17 Sleeve 18 Packing

Claims (4)

[Claims] Claim 1: A dust collector outer casing, a dust collection opening and an intake port provided in the outer casing, a suction blower attached to the dust collector outer casing so that its suction port communicates with the intake port, and the outer casing. A dust collection filter disposed between the dust collection opening and the intake port, a high-performance exhaust filter, and one end of the high-performance exhaust filter on the exhaust side airtightly supported by the outer casing via a sealing mechanism. a mechanism for airtightly connecting the intake side of the other end of the high-performance exhaust filter to the exhaust port of the suction blower, and a power cord or power switch installed through the cover, etc. A dust collector with a high-performance exhaust filter, characterized in that the dust collector comprises a through hole formed in a portion of the outer casing facing the space surrounded by the cover. 2. The dust collector with a high-performance exhaust filter according to claim 1, wherein the mechanism for airtightly communicating the intake side of the high-performance exhaust filter with the exhaust port of the suction blower is a rubber sleeve. 3. A dust collector outer casing, a dust collection opening and an air inlet provided in the outer casing, a suction blower attached to the dust collector outer casing so as to communicate the suction opening with the air inlet, and the outer casing. A dust collection filter placed between the dust collection opening and the intake port, a donut-shaped high-performance exhaust filter, and the outer peripheral exhaust side of this high-performance exhaust filter are airtightly supported by the outer casing via a sealing mechanism. A cover provided on the outer case, a mechanism for airtightly communicating the inner peripheral intake side of the high performance exhaust filter to the exhaust port of the suction blower, and a power cord or power switch provided through the cover. A dust collector with a high-performance exhaust filter, comprising a hole for mounting, etc., and a through hole formed in a portion of the outer casing facing the space surrounded by the cover. 4. A mechanism for airtightly connecting the inner peripheral intake side of the high-performance exhaust filter to the exhaust port of the suction blower comprises a cylindrical body airtightly fixed to the suction blower and packing. The dust collector with a high-performance exhaust filter described in 3.