JP2010110744A - Automatic rolling-up air filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems in which a conventional automatic rolling-up air filter has a collection rate of about 85% at the highest in a mass method, is not necessarily satisfactorily in terms of prevention of contamination of an air conditioner coil for example, and requires large installation space and causes an increase in the running cost when trying to obtain high efficiency as a system by installing a medium performance air filter and the like in the rear stage of the automatic rolling-up air filter. <P>SOLUTION: There is disclosed an automatic rolling-up air filter which uses a conjugate fabric filtering material for a roll, the material being formed to obtain a high collection rate by sticking together a low density layer and a high density layer each composed of the conjugate fiber as a two-layered structure, while having strength for tension and compression required for the automatic rolling-up air filter. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an automatic wind-up air filter that filters and collects polluted air for factory air conditioning, building air conditioning, or gas turbine intake.

  In general, this type of self-winding air filter has a filter medium set in the ventilation section that opens in the front-rear direction of the main body of the device so as to block the entire surface. It is carried out.

  And as the polluted air such as factory air conditioner, building air conditioner or gas turbine air conditioner is filtered and collected by the automatic wind-up air filter, the amount of dust trapped in the filter medium increases and the filter surface of the filter medium is clogged and filtered Since the pressure loss resistance of the surface part gradually increases and the desired passing air volume cannot be obtained, the filter medium is detected by operating the drive unit of the automatic wind-up type air filter by detecting at every fixed time or every fixed pressure difference. The pressure loss of the filter surface portion of the filter medium is prevented from increasing by driving and feeding out unused portions of the filter medium.

  Therefore, the automatic take-up type air filter is mechanically driven so that the filter medium is sequentially wound around the take-up roll of the take-up side end panel from the new filter medium roll loaded in the feeding side end panel, and the filtration surface portion of the filter medium sags. It is necessary to increase the strength of the filter medium itself, and further to the thickness of the filter medium necessary for performance when it is unwound from a state of being compressed and wound up. Accordingly, it was necessary to select a relatively thick fiber having a fiber diameter of, for example, about 40 to 50 μm. For this reason, only about a collection rate of up to about 85% can be obtained as a filter performance, and it is not always satisfactory when considering the prevention of contamination of an air conditioner coil installed at the subsequent stage of the automatic winding air filter. However, considering the longer life of the equipment by protecting the equipment, labor saving, or the frequency of cleaning, higher efficiency of the automatic wind-up air filter has been demanded.

  For this reason, attempts have been made to increase the efficiency of the system by installing a medium-performance air filter, etc., in the subsequent stage of the automatic wind-up air filter. However, problems such as installation space problems, installation costs, and running costs increase. However, it was not preferable.

  On the other hand, a filter medium for general air conditioning filters with high collection efficiency has a two-layer structure in which a filter medium with a high collection efficiency and a filter medium with a low collection efficiency are closely overlapped to prevent shortening the service life due to clogging. Although a filter medium is considered, the two-layer structure filter medium of these air-conditioning filters has a low strength and is unsuitable as a filter medium that applies tension to the filter medium like an automatic winding air filter.

  In the case of a two-layer filter medium, a method of increasing the strength by thickening the filter medium layer having a low collection efficiency is also conceivable, but it is necessary for performance when the filter medium is drawn out from a compressed state. Since it was necessary to recover to the thickness of the filter medium, the desired filter medium could not be obtained.

Problems to be solved by the invention

  The present invention is intended to solve the above-mentioned problems. First, the object of the present invention is to provide a high-capacity air filter that automatically winds a filter medium from a new filter medium roll to a winding roll. A function of collecting efficiency is provided.

  Next, an object of the present invention is to provide a machine that sequentially winds the filter media from the new filter media roll to the take-up roll in a state where a constant tension is applied without sagging the filtration surface portion of the filter media while having a high collection efficiency function. In addition, the filter medium is further restored to the thickness of the filter medium required for performance when the filter medium is drawn out from a state of being compressed and wound.

  Next, an object of the present invention is to increase the life of the filter medium by suppressing the increase in the pressure loss of the filtration surface portion as much as possible even when the dust concentration of the contaminated air to be treated is high.

  A further object of the present invention is to provide a self-winding air filter with a function of collection efficiency from a pre-filter to a medium performance air filter.

Means for solving the problem

  The first solution of the present invention is a self-winding type air filter in which a filter medium is sequentially wound from a new filter medium roll to a take-up roll, and the new filter medium roll has a function of high collection efficiency, and is tensile and compressible. The composite fiber filter medium for rolls having the required strength is used, and the filter medium is sequentially wound by a winding roll.

  The second solving means of the present invention has a two-layer structure of a low-density layer on the upstream side and a high-density layer on the downstream side of the roll composite fiber filter medium used in the new filter medium roll. It is characterized by comprising a single filter medium sheet.

  Here, the composite fiber filter medium for rolls will be described. The composite fiber filter medium for rolls is composed of one filter medium sheet having a two-layer structure of a low density layer and a high density layer. The material of the low density layer and the high density layer of this filter medium sheet is not particularly limited, but the fiber A material using a shaped material is preferable.

  As a preferable material for the low-density layer on the upstream side, organic fibers such as polyester fibers, polyamide fibers, polyethylene fibers, rayon, and vinylidene chloride fibers can be used. These may be used alone or in combination of two or more.

  The fibers used for the upstream low density layer are manufactured by selecting and combining a plurality of diameters within a fiber diameter range of 20 to 60 μm.

  Next, as the material of the high-density layer on the downstream side, the same organic fiber as the fiber used for the upstream layer is used, but a plurality of diameters within a range of 10 to 50 μm are selected and combined. To make.

  As a method for forming the composite fiber filter medium for rolls, a method using a wet papermaking method, a dry method, a spunbond method, a melt blow method, or the like is used.

  In this way, the produced composite fiber filter medium for rolls is impregnated with a resin binder from the upstream low-density layer to the downstream high-density layer in order to provide tensile strength and compressibility. As the resin binder to be used, a mixed binder obtained by adding an organic binder, an inorganic binder, a molten fiber or the like alone or by mixing them is used. The binder is preferably polyester that does not generate VOC gas.

  Next, the manufacturing method of the composite fiber filter material for rolls is described. First, a polyester fiber that is compounded in a plurality of types in a fiber diameter range of 20 to 60 μm and a polyester fiber that is compounded in a range of fiber diameters of 10 to 50 μm to be a high density layer is a low density layer on the upstream side, The layers were stacked so that the downstream side was a high-density layer, heat-treated so that the thickness of the filter medium was 20 to 25 mm, heat-sealed, and then fixed and integrated to form a two-layer structure of a low-density layer and a high-density layer. The basis weight of the filter medium at this time is preferably about 380 ± 50 g / m 2.

  Then, it cuts out to the required filter medium width | variety, and it winds up in roll shape, applying a load, and is set as a new filter medium roll. The roll winding diameter at this time is preferably 320 mm or less. Then, the new filter medium roll is loaded on the supply side end panel of the automatic winding air filter installed in the air conditioner, and the filter medium is supplied and used.

  The operation of the problem solving means is as follows. In other words, the air in the outside air or air circulated from the room by the air intake operation of the air conditioner flows into the automatic take-up air filter and passes through the filter surface of the filter medium, so that dust in the air is removed. The dust having a large particle size is collected by the fibers of the low density layer disposed on the upstream side of the composite fiber filter material for rolls according to the present invention. On the other hand, dust with a relatively small particle size passes through the low-density layer, but it is formed so as to become denser from coarse to dense as it goes from the upstream side to the downstream side in the airflow direction. Since it is captured with a sufficient collection efficiency, it is captured evenly throughout the entire internal space of the roll composite fiber filter medium, and the space volume of the filter medium is fully utilized. For this reason, it is less clogged as compared with the conventional one, has a function that leads to a longer life and a reduction in pressure loss.

  In addition, the composite fiber filter media for rolls can be recovered to the normal filter media thickness by the fiber configuration after being fed from a new filter media roll that has been wound in a compressed state to a take-up roll, so that sufficient fiber space is available to collect dust. Even if a large amount of dust flows, the degree of increase in pressure loss is small and it can be used for a long time.

Furthermore, since the composite fiber filter medium for rolls has sufficient strength, it does not break or fray when it is fed from a new filter medium roll to a take-up roll, and is required as an automatic take-up air filter. High performance can be continued throughout the period of use.

The invention's effect

As described above, the automatic winding air filter of the present invention has the following effects.
(1) Since the composite fiber filter medium for rolls used in the automatic wind-up air filter of the present invention has a higher collection rate than the conventional filter medium, in the air after vortexing through the automatic wind-up air filter Therefore, it is possible to greatly reduce the dust concentration, protect the equipment such as the air conditioner coil installed in the subsequent stage, and extend the life of the equipment.
(2) Furthermore, since the composite fiber filter medium for rolls has a higher collection rate than the conventional filter medium, the amount of dust accumulated in the duct on the downstream side of the air conditioner can be reduced and the air supplied to the room can be purified. Therefore, it is very effective for protecting the health of personnel in the room and protecting precision instruments used.
(3) Conventionally, it is necessary to improve the efficiency of the system by installing a medium-performance air filter after the automatic wind-up air filter. In that case, the air conditioner has been modified in order to secure the installation space. However, the automatic winding air filter of the present invention can achieve high performance without changing the specifications of the air conditioner.
(4) When the self-winding air filter of the present invention is used as a pre-filter for a medium performance air filter, the concentration of dust flowing into the medium performance air filter can be greatly reduced. As a result, it is possible to suppress the degree of increase in the temperature and extend the service life, thereby making it possible to reduce the total cost.
(5) Even when the dust concentration of the contaminated air to be treated is high, the filter media can be recovered to the normal filter media thickness, so that sufficient fiber space can be taken to collect the dust, greatly extending the filter media renewal period and reducing running costs. Can be reduced.
(6) Since the filter medium itself does not contain chlorine, sulfur, or VOC gas components, no outgas is generated, and it can be recycled at the time of use and disposal in a semiconductor factory or the like, thereby reducing the environmental burden.

  The self-winding air filter of the present invention will be described in detail with reference to the drawings.

  First, reference numeral 1 denotes a main body of an automatic wind-up type air filter. In this case, the main body 1 has a U-channel frame shape that is vertically vertical and has a narrow front and rear width, and a central portion thereof is a ventilation portion that opens greatly in the front and rear direction. ing. Reference numeral 2 denotes a feeding-side end panel, and 3 a winding-side end panel, which is erected on the main body 1. Reference numeral 4 denotes a media cover that is movably supported on the feeding-side end panel 2. Reference numeral 5 denotes a filter material supply spool which is supported by a notch groove 7 of the media cover 4 by a spool pin 6.

  Reference numeral 8 denotes a take-up spool, one end of which is attached to the take-up end panel 3 via a non-drive side spool pin 9 and the other end of which is attached to a sprocket 11 via a drive side spool pin 10. The sprocket 11 is connected to a geared motor 13 via a roller chain 12.

  14 is a filter medium feeding reel, 15 is a support rod provided on the upstream side in the air flow direction, 16 is a support rod provided on the downstream side, 17 is a support channel provided on the upstream side, and 18 is a support channel provided on the downstream side. .

  19 is a tension panel, and 20 is a tension panel spring. The tension panel 19 prevents the filter medium from sagging between the filter medium supply reel 14 and the take-up spool 8 by utilizing the spring 20.

Next, a method for attaching the new filter medium roll to the main body will be described.
First, the composite fiber filter medium 21 for rolls is previously compressed into a roll shape on the filter medium supply spool 5 to complete a roll-up new filter medium roll 22. Next, the spool pin 6 is attached to the filter medium feeding spool 5 and loaded into the notch groove 7 of the media cover 4 in the feeding side end panel 3.

  Next, the roll composite fiber filter medium 21 is fed from the new filter medium roll 22, and the filter medium is fed to the guide rail (not shown) through the upper part of the filter medium feeding reel 14. Then, the media cover 4 is returned to the original position and fixed by the left and right latches 23. Furthermore, a hand is put in from the lower side of the media cover 4, and a new filter medium is pulled down along the guide rail between the front and rear support channels 17 and 18.

  Next, the anti-drive side spool pin 9 and the drive side spool pin 10 are attached to both ends of the take-up spool 8, the anti-drive side spool pin 9 is attached to the take-up end panel 3, and the drive side spool pin is attached to the sprocket 11. And the composite fiber filter material 21 for rolls pulled down along the guide rail is wound up by the winding spool 8, and a winding roll is completed.

When the power is turned on, the automatic winding operation is started.

  Here, the roll composite fiber filter medium 21 is made of polyester and has a low density layer 21a and a high density layer 21b fixed thereto. The low density layer 21a is composed of three types of mixed fibers having fiber diameters of 45 to 60 μm, 30 to 45 μm, and 20 to 30 μm, and is bonded by an ester urethane resin. The high-density layer 21b is composed of two types of mixed fibers having fiber diameters of 30 to 45 μm and 10 to 25 μm, and is bonded by an ester urethane resin.

  The low-density layer 21a and the high-density layer 21b are separately manufactured and stacked, and fixed by heat treatment to obtain a roll composite fiber filter medium 21. This results in a filter medium configuration having relatively thick fibers that contribute to maintaining the strength of the filter medium and relatively thin fibers that contribute to performance improvement, and is required for performance when the filter medium is unwound after being compressed and wound. It recovers to the filter media thickness.

  This composite fiber filter medium 21 for rolls is cut into a filter medium width that can be loaded into the main body. The filter medium length at this time is 15 to 20 m.

  The roll composite fiber filter media 21 having the same filter media width is wound into a roll shape while applying a load with the metal filter media feed spool 5 as a core, and is configured to be loaded into the media cover 4. The roll winding diameter at this time is preferably 320 mm or less. The filter medium feeding spool 5 may be a square paper tube instead of metal.

  In order to confirm the performance of these filter media, the filter media were cut into 500 × 500 mm, and a performance test was performed based on JIS B 9908 test method format 3. The test was conducted with a filtration wind speed of 2.5 m / s and a final pressure loss of up to 400 Pa, and 15 kinds of powder 1 for JISZ8901 test were used as test powders. As a result, the mass method average collection rate was 95.1%, the colorimetric method average collection rate was 55.3%, and the mass method average collection rate in the synthetic fiber nonwoven fabric filter conventionally used as a roll filter. The collection rate was significantly improved from 85%.

  In addition, these filter media were loaded into an automatic take-up air filter, and a performance test in actual atmospheric dust was performed. The air conditioner set wind speed was 2.5 m / s and the final pressure loss was 265 Pa. As a result, the colorimetric method average collection rate was 52.0%, which was significantly improved from the colorimetric method average collection rate of 34.7% in the synthetic fiber nonwoven fabric filter.

In addition, in the said Example, only one Example was described, and even if it changes variously, the summary of this invention will not be changed at all.

  The present invention improves the performance of an automatic wind-up air filter for air cleaning used in outside air intake and air conditioning in factories, buildings, gas turbine plants, etc. Therefore, it is extremely useful for extending the service life of medium-performance air filters.

It is a side view which shows the whole this invention. It is a front view which shows the whole this invention. It is an exploded view showing the whole of the present invention. It is a figure which shows the detail of the filter medium which comprises this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Main body of automatic winding type air filter 2 ... Delivery side end panel 3 ... Winding side end panel 4 ... Media cover 5 ... Filter material feeding spool 6 ... Spool pin 7 ··· Notched groove 8 · · · Take-up spool 9 · · · Spool pin 10 · · · Drive side spool pin 11 · · · Sprocket 12 · · · Roller chain 13 · · · Geared motor 14 · · · Filter medium feeding reel 15 ... Support rod 16 ... Support rod 17 ... Support channel 18 ... Support channel 19 ... Tension panel 20 ... Spring for tension panel 21 ... Composite fiber filter medium for roll 22 ... New filter medium roll 23 ... Latch 21a ... Low density layer 21b ... High density layer 21b

Claims (3)

  An automatic wind-up type air filter in which the filter medium is wound up sequentially from the new filter medium roll loaded in the feed-end end panel to the roll-up roll of the wind-up end panel. A self-winding air filter characterized by winding a roll composite fiber filter medium having high strength.   The roll composite fiber filter medium having a high collection efficiency function and strength has a two-layer structure of a low-density layer on the upstream side and a high-density layer on the downstream side with respect to the airflow direction. The automatic winding air filter according to 1.   The self-winding air filter according to claim 1, wherein the roll composite fiber filter medium having a high collection efficiency function and strength is made of fine fibers such as polyester alone or a composite fiber.

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