JP2010253455A - Filter for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter for an air conditioner that meets the expectation for a filter for an air conditioner having a suitable double structure, because a filer combined with an additional filter of low collection efficiency installed upstream for clogging prevention or two filters of different collection efficiency laid closely of which the upstream filter medium has low collection efficiency result in cost increase and are not satisfactory, in the case that a filter for an air conditioner of high collection efficiency to fine particles is intended to be installed in an air conditioning system. <P>SOLUTION: The filter for an air conditioner is made of two combined sheet filter mediums selected from the sheet filter mediums having a function of a prefilter, a medium or high performance filter, a quasi HEPA filter, a HEPA filter and a ULPA filter having each different collection efficiency, according to the dust concentration in air intake environments which changes depending on change of atmospheric dust and change of surroundings. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an air-conditioning filter. Generally, the higher the performance of an air-conditioning filter, the shorter the lifespan, and to solve the problem that the trapping performance and the lifespan are difficult to achieve at the same time. It is a thing.

  Conventionally, when installing an air conditioning filter having a high collection efficiency for fine particles in an air conditioning system, a filter with a low collection efficiency is arranged in front of an air conditioning filter with a high collection efficiency to prevent clogging, Air-conditioning filters that have two filters with different collection efficiencies closely stacked and a low-capacitance function in the front-stage filter are used. However, the former is limited in installation space and complicated or expensive. From the point of view, the latter is not enough, and if one of two different filters is clogged, the entire air conditioning filter must be replaced, resulting in an increase in cost. It was not enough.

  The present invention is intended to solve the above-mentioned problems, and one of the purposes is to review the sheet filter medium constituting the filter medium according to changes in atmospheric dust and the surrounding environment, and to demonstrate the life of the air conditioning filter as intended. It intends to provide an air conditioning filter that can be used.

  Another object of the present invention is to provide a filter for air conditioning in which the life of the sheet filter medium constituting the filter medium is simultaneously reached.

  Another object of the present invention is to provide an air-conditioning filter with a low pressure loss while having a long filter life.

  The first solving means of the present invention is characterized in that two sheet filter media having different collection efficiencies are combined in accordance with the dust concentration in the intake environment of the air conditioning filter.

  The second solution of the present invention is that two sheet filter media having different collection efficiencies have a sheet filter medium having a pre-filter performance, a sheet filter medium having a medium-high performance filter performance, and a semi-HEPA filter performance. It is characterized by being selected and combined from sheet filter media, sheet filter media with HEPA filter performance, and sheet filter media with ULPA filter performance.

  The third solution of the present invention is characterized in that the sheet filter medium having the prefilter performance is JIS B 9908 model 3 (mass method) and the average collection rate is 50 to 90%. .

  The fourth solution of the present invention is characterized in that the sheet filter medium having the performance of a medium-high performance filter is JIS B 9908 type 2 (colorimetric method) and the average collection rate is 65% or more. is there.

  A fifth solution of the present invention is characterized in that a sheet filter medium having the performance of a quasi-HEPA filter has a collection rate of 95% or more for 0.3 μm particles in JIS B 9908 model 1 (counting method). To do.

  A sixth solution of the present invention is characterized in that a sheet filter medium having the performance of a HEPA filter has a collection rate of 99.97% or more for 0.3 μm particles in JIS B 9908 Model 1 (counting method). Is.

  The seventh solution of the present invention is characterized in that the sheet filter medium having the performance of the ULPA filter is 99.9995% or more based on JIS B 9927 (JIS B 9908 type 1 compliant) with respect to 0.15 μm particles. is there.

  Here, the sheet filter medium having the performance of the pre-filter is made of long glass fiber, and has a “density gradient structure” composed of a relatively coarse layer on the upstream side and a high-density layer on the downstream side. Finished with a highly elastic sheet. And the thickness of a sheet | seat filter medium is about 0.5 mm.

  The sheet filter medium with the performance of a medium to high performance filter is made of glass fiber sheets suitable for upstream applications with a large dust holding capacity, bonded to glass fibers with a fiber diameter of about 5 to 20 μm with a binder, or the same glass fiber. Made of glass fiber sheets suitable for denser downstream applications with water processing. The thickness of the sheet filter medium is about 0.5 mm.

  A sheet filter medium with the performance of a quasi-HEPA filter consists of a glass fiber sheet suitable for upstream applications with a large dust holding capacity, which is bonded to a glass fiber having a fiber diameter of about 1 to 5 μm with a binder, or the same glass fiber. Made of glass fiber sheets suitable for denser downstream applications with water processing. The thickness of the filter medium is about 0.5 mm.

  Sheet filter media with HEPA filter performance is a glass fiber sheet suitable for upstream applications with a large dust holding capacity, which is bonded to a glass fiber having a fiber diameter of about 0.5 to 1.0 μm with a binder, or the same glass fiber. It is made of a glass fiber sheet suitable for denser downstream applications with a water repellent finish. And the thickness of a sheet | seat filter medium is about 0.5 mm.

  The sheet filter medium having the performance of ULPA filter is composed of a glass fiber sheet in which glass fibers having a fiber diameter of 0.5 μm or less are bonded with a binder. And the thickness of a sheet | seat filter medium is about 0.5 mm.

  The production of medium and high performance filters consists of prefilter performance and water-repellent sheet filter medium, and medium and high-performance filter performance suitable for downstream applications, and water-repellent sheet filter medium. Sheet filter media with the performance of a medium-high performance filter suitable for upstream applications with a double structure or large dust holding capacity, and medium-high performance filters suitable for denser downstream applications with water repellent finish Fold a double-layered filter medium consisting of high-performance sheet filter medium into a zigzag shape, fold it, and put a separator or bead-like adhesive between the fold-folded filter medium with an adhesive in the outer frame. It is installed airtight.

  In addition, semi-HEPA filters are manufactured using sheet filter media with medium and high performance filter performance suitable for upstream applications with a large dust holding capacity, and semi-HEPA filters suitable for more dense downstream applications with water-repellent processing. A double-layer filter medium consisting of a sheet filter medium with high performance, or a sheet filter medium with a semi-HEPA filter performance suitable for upstream applications with a large dust holding capacity, and a denser water-repellent finish A double-layer filter medium consisting of a sheet filter medium with the performance of a medium-high performance filter suitable for downstream applications is folded in a zigzag shape, fold-folded, and a separator or bead-like adhesive between the fold-folded filter media And is attached in an airtight manner with an adhesive in the outer frame.

  In addition, the manufacture of HEPA filters will improve the performance of HEPA filters suitable for denser downstream applications with a sheet filter medium with the performance of semi-HEPA filters suitable for upstream applications with a large dust holding capacity and water-repellent processing. Suitable for double-layered filter media with sheet filter media, or sheet filter media with HEPA filter performance suitable for upstream applications with a large dust holding capacity, and denser downstream applications with water repellent finish A double-layer filter medium consisting of a sheet filter medium with the performance of a HEPA filter is folded in a zigzag shape, then fold-folded, and a separator or a bead-like adhesive is sandwiched between the fold-folded filter medium, and the outer frame It is airtightly attached with an adhesive inside.

  In addition, the ULPA filter is manufactured in a double structure consisting of a sheet filter medium having the performance of a semi-HEPA filter suitable for upstream applications with a large dust holding capacity and a sheet filter medium having the performance of a ULPA filter, or A double-layered filter medium consisting of a sheet filter medium with HEPA filter performance suitable for upstream applications with a large dust holding capacity and a sheet filter medium with ULPA filter performance is folded in a zigzag shape and fold-folded. In addition, a separator or a bead-like adhesive is sandwiched between fold-folded filter media, and the outer frame is airtightly attached with an adhesive.

  The combination of the sheet medium constituting the medium-high performance filter, the semi-HEPA filter, the HEPA filter, and the ULPA filter described above is an example, and the gist of the present invention is not limited to this and may be changed variously. Does not change.

  The effect | action by the said problem solution is as follows. Here, the selection of the filter is determined according to the weather, changes in the weather, and changes in the surrounding environment. Here, the case of the medium-high performance filter will be described.

  First, in this medium to high performance filter, when contaminated air is sent from the front surface of the filter outer frame, the contaminated air passes through gaps between a large number of filter media formed by separators or bead-like adhesives. Dust with a size larger than fine dust is filtered and collected by the sheet filter medium having a large holding capacity. As a result, the polluted air that has become only fine dust enters the denser sheet filter medium that is then subjected to water-repellent finishing, and the fine dust is collected by filtration. Go out to the rear side. Accordingly, dust having a large dust holding capacity is collected, and only fine dust is collected on the high-density sheet filter medium. Therefore, the dust collecting capacity is increased as a whole, and the high-density sheet is collected. The collection efficiency of the filter medium can be improved and the life of the filter medium can be extended, enabling long-term use.

  In particular, when the dust is mist or sea salt particles with deliquescence, it adheres to the upstream sheet filter medium and may permeate and diffuse into the downstream sheet filter medium, but the downstream sheet filter medium rather than the upstream sheet filter medium. Since it has a strong water repellent effect, it does not pop out on the downstream side sheet filter medium.

  Further, since two different sheet filter media are polymerized, the strength of the filter media is higher than that of the conventional one, so that even if the pressure loss becomes considerably large, it can be used without being damaged.

  As described above, the air-conditioning filter of the present invention has the following effects.

(1) Since each sheet filter medium composing the filter medium can be selected according to changes in the surrounding environment, the upstream side in the airflow direction is a sheet filter medium with a large dust holding capacity, so it can hold a lot of dust Since the downstream sheet filter medium is provided with a denser sheet filter medium that is water-repellent than the upstream sheet filter medium, it is possible to provide a long-life air conditioning filter with low pressure loss.

(2) Since large particles are roughly removed by the upstream sheet filter medium, the burden on the downstream sheet filter medium can be greatly reduced.

(3) Since the change in the fiber configuration from the upstream side to the downstream side in the airflow direction is an optimal two-stage density gradient, the amount of collected filter media is averaged while satisfying the required collection performance, Suppresses the extreme increase in pressure loss and extends the service life.

(4) Since the life of the filter medium is extended, the maintenance cost of the air purification device can be reduced.

(5) Since an extreme increase in pressure loss can be suppressed, it is possible to save energy in the operating cost of a driving device such as a fan.

(6) Since the filter medium has a double structure, troubles such as cracks and fold mountain defects do not occur when the filter medium is folded and assembled as a filter.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an air conditioning filter showing an embodiment of the present invention, showing a partially broken view. The enlarged view of the X section represented in FIG. 1 is shown. It is a perspective view of the filter for air conditioning which shows the other Example of this invention, and shows what was fractured | ruptured partially. The enlarged view of the Y section shown in FIG. 3 is shown.

  Hereinafter, the air-conditioning filter of the present invention will be described with reference to FIGS.

In the figure, reference numeral 1 denotes an outer frame of an air-conditioning filter, which has a box shape with open front and rear surfaces, and a double-structured filter medium 2 is generally compact as shown in the figure. In order to increase the filtration area, it is bent and mounted in a zigzag shape. That is, as shown in an enlarged view in FIG. 2, a wavy line is arranged in a direction perpendicular to the folding line between the folded portions 3, 3,... Of the filter medium 2 folded in a zigzag shape. The plate-like separators 4, 4... Are arranged, and similarly, as shown in FIG. 3 and a partially enlarged view thereof, the filter medium 2 is mounted in the outer frame 1 by being bent in a zigzag shape. A large number of ventilation paths 6, 6... Are formed by folding thread-like or string-like adhesive resins 5, 5.

  Such a double structure filter medium 2 is made of glass fiber, is made of the same glass fiber as the upstream sheet filter medium 7 having a large dust holding capacity, and has a denser downstream sheet filter medium 8 subjected to water repellent processing. It has a superposed density gradient type structure.

  Further, the two different polymerized sheet filter media 7 and 8 are each in the form of paper and have different densities, and the upstream sheet filter media 7 disposed on the front side with respect to the direction in which the contaminated air flows. Is a relatively low density that collects large dust, and the downstream sheet filter medium 8 arranged on the rear side is a high density that collects fine dust.

  Next, the operation of the above-described configuration will be described. When contaminated air is sent from the front side of the outer frame 1, the contaminated air is opened to the front side between the bent portions 3, 3. The air enters the ventilation passages 6, 6..., And dust of a size larger than fine dust is first collected and removed by the upstream sheet filter medium 7 having a large dust holding capacity. As a result, the polluted air, which has become only fine dust, then enters the dense downstream sheet filter medium 8 where fine dust is filtered and collected, and the air purified thereby escapes to the rear side of the filter, Supplied as clean air.

  Therefore, a large amount of dust (including dust, etc.) is collected on the upstream sheet filter medium 7 having a large dust holding capacity, and only fine dust is collected on the dense downstream sheet filter medium 8. As a result, the dust collection capacity becomes large as a whole, the collection efficiency of the downstream sheet filter medium 8 can be improved, and the life of the sheet filter medium 8 can be extended.

  In addition, since two different sheet filter media 7 and 8 are polymerized to form a density gradient type structure, the filter media strength is higher than that of the conventional one and the pressure loss is considerably increased during use of the filter. Can be used without being damaged.

  Next, a method for manufacturing an air conditioning filter will be described.

[Example 1]
An upstream sheet filter medium consisting of glass fiber with a fiber diameter of about 30 μm, JIS B 9908 Model 3 (mass method) with an average collection rate of 50 to 90%, and prefilter performance with a large dust holding capacity , Downstream of JIS B 9908 Model 2 (colorimetric method) with a water repellent finish made of glass fiber with a fiber diameter of about 5 to 20 μm, with an average collection rate of 60% or more. The filter media with a density gradient that overlaps with the sheet filter media is folded into a zigzag shape in the outer frame, and a corrugated separator or bead-like adhesive is sandwiched between the folded filter media and bonded in the outer frame. The air-conditioning filter having the function of the medium to high performance filter shown in Table 1 which was bonded and integrated with the agent was obtained.

The measured values of the captured data concentration in this example are as shown in Table 2.

[Example 2]
It is made of glass fiber with a fiber diameter of about 5 to 20μm, and has an average collection rate of 60% or more according to JIS B 9908 Model 2 (colorimetric method), and has the performance of a medium to high performance filter with a large dust holding capacity. A quasi-HEPA filter that has a collection rate of 95% or more for 0.3 μm particles in JIS B 9908 Model 1 (counting method) with water repellent processing consisting of sheet filter media and glass fibers with a fiber diameter of about 1 to 5 μm Overlay the downstream filter media with performance and fold the filter media with density gradient into the outer frame in a zigzag manner, and sandwich the corrugated separator or bead adhesive between the folded filter media. The air-conditioning filter having the function of the semi-HEPA filter shown in the following Table 1 was obtained by bonding with an adhesive inside the outer frame.

The measured values of the captured data density in this example are shown in Table 3.

[Example 3]
Upstream sheet consisting of glass fiber with a fiber diameter of about 5-20μm, JIS B 9908 Model 2 (colorimetric method) with an average collection rate of 60% or more, and a medium-high performance filter with a large dust holding capacity And the performance of a HEPA filter consisting of glass fibers with a fiber diameter of about 0.5-1 μm and having a collection rate of 99.97% or more for 0.3 μm particles in JIS B 9908 Model 1 (counting method) with water repellent finish The filter media with density gradient is overlapped with the downstream sheet and folded in a zigzag shape in the outer frame, and a corrugated separator or bead-like adhesive is sandwiched between the folded filter media, and the outer frame The inner peripheral surface was bonded with an adhesive to obtain an air conditioning filter having the function of the HEPA filter shown in Table 1 below.

The measured values of the captured data concentration in this example are as shown in Table 4.

  In this embodiment, one embodiment of the present invention has been described. However, the present invention is not limited to this embodiment, and the gist of the present invention is not changed at all by various modifications.

According to the present invention, the combination of two sheet filter media having different collection rates constituting the filter medium can be freely selected according to the dust concentration in the intake air environment of the air conditioning filter, so that it is low while maintaining high collection efficiency. Longer life due to pressure loss, ideal as an air conditioning filter for air intake.

DESCRIPTION OF SYMBOLS 1 ... Outer frame of air-conditioning filter 2 ... Filter medium 3 ... Bending part 4 ... Corrugated plate-like separator 5 ... Thread-like adhesive resin 6 ... Ventilation path 7 ... Upstream side Sheet filter medium 8 ... downstream sheet filter medium

Claims (7)

  Two filter media with different collection rates combined with a filter mounting frame of the air intake port are folded in a zigzag shape, and a corrugated separator or bead adhesive is sandwiched between the bent portions. A filter for air conditioning in which the entire circumference of the filter medium is airtightly attached to the outer frame of the front and rear surfaces with an adhesive, and combines two sheet filter media with different collection efficiencies according to the dust concentration in the intake environment of the air conditioning filter Air conditioning filter.   The two sheet filter media having different collection efficiencies are sheet filter media having pre-filter performance, sheet filter media having medium-high performance filter performance, sheet filter media having semi-HEPA filter performance, and HEPA filter performance. The air-conditioning filter according to claim 1, wherein the air-conditioning filter is selected and combined from a sheet filter medium having a ULPA filter performance.   The air filter according to claim 1, wherein the sheet filter medium having the prefilter performance is JIS B 9908 Model 3 (mass method) and has an average collection rate of 50 to 90%.   The air-conditioning filter according to claim 1, wherein the sheet filter medium having the performance of the medium-high performance filter is JIS B 9908 Model 2 (colorimetric method) and has an average collection rate of 65% or more.   The air-conditioning filter according to claim 1, wherein the sheet filter medium having the performance of the quasi-HEPA filter has a collection rate of 95% or more for 0.3 µm particles according to JIS B 9908 Type 1 (counting method). .   The air-conditioning filter according to claim 1, wherein the sheet filter medium having the performance of the HEPA filter has a collection rate of 99.97% or more for 0.3 µm particles according to JIS B 9908 Model 1 (counting method).   The air-conditioning filter according to claim 1, wherein the sheet filter medium having the performance of the ULPA filter is 99.9995% or more based on JIS B 9927 (JIS B 9908 Model 1 compliant) with respect to 0.15 µm particles.

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