JP2011161358A - Filter washing device and filter washing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact filter washing device of high performance effectively washing to the filter medium inside of a filter and pushing out foreign matters collected in the filter medium inside, and a filter washing method. <P>SOLUTION: The filter washing device 1 includes a conveyer 3 transferring the filter 2, a washing liquid jetting nozzle group 4 consisting of a plurality of washing liquid jetting nozzles 24 jetting the washing liquid to the filter 2 on the conveyer 3, and a high pressure gas jetting nozzle group 5 consisting of a plurality of high pressure gas jetting nozzles 25 jetting only high pressure gas to the filter 2 in the downstream of the washing liquid jetting nozzle group 4 on the conveyer 3. The filter washing method includes steps of: loading the filter 2 on the conveyer 3, jetting the washing liquid to the filter 2 while conveying the filter 2, and jetting only high pressure gas to the filter 2 while conveying the filter 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a filter cleaning apparatus and a filter cleaning method, and more particularly, to a filter cleaning apparatus provided in an air conditioner, and a filter cleaning method using the filter cleaning apparatus.

  For example, a net-like filter with a frame around the periphery is attached to the air intake of a building air conditioner or the like to collect foreign matter such as dust in the air sucked by the air conditioner or the like. Is generally filtered. This filter removes foreign matter such as dust that adheres to the filter surface due to use and reduces the filter's ability to filter air. Has been done.

  The mesh filter is washed by, for example, water washing with a high-pressure air jetter, suction by vacuum, sieving (striking) using a vibrator, scraping with a brush, or a combination thereof. These cleaning operations are performed manually or semi-automatically.

  For example, Patent Literature 1 discloses a filter cleaning device that cleans a net-like filter attached to an air intake port such as an air conditioner. Here, it is disclosed that dust or the like adhering to a net-like filter having a frame on the periphery attached to an air conditioner or the like is removed from the dirty surface of the filter by ejecting air by an air nozzle and operating a rotating brush. .

  Further, an air conditioning filter using a filter medium is employed as a medium performance or high performance air conditioning filter. The air-conditioning filter using this filter medium also collects fine dust and oil components in the air after attaching a mesh filter by a pre-filter to collect dust and the like. This filter medium is made of a porous nonwoven fabric mainly composed of chemical fibers, and collects foreign matters such as fine dust and oil components in the air by its network structure. In the present specification, fine dust and oil components in the air collected by the air conditioning filter (or filter) are collectively referred to as “foreign matter”.

  Conventionally, this air-conditioning filter has been disposable because of the difficulty in cleaning the filter medium, but attempts have been made to recycle and reuse it due to increased concern about environmental problems. An automated cleaning method for recovering and cleaning the air conditioning filter has been proposed. This automatic cleaning of the air-conditioning filter is mainly performed by an ultrasonic cleaning system using an ultrasonic cleaning effect. A cleaning system using supercritical carbon dioxide suitable for a gas adsorption filter such as a chemical filter has also been proposed.

  On the other hand, Patent Document 2 discloses a filter cleaning device that automatically cleans a filter used in an air conditioning facility. Here, a plurality of air injection nozzles for injecting high-pressure air toward the transfer surface of the transfer conveyor are provided on the transfer path of the filter transferred by the transfer conveyor at a predetermined interval in the width direction of the transfer conveyor. It has a high-pressure air injection port on the downstream side of the injection nozzle, a water injection port is formed on the outside of it, and carries multiple gas-liquid injection nozzles that simultaneously inject high-pressure air and high-pressure water from both ports It is disclosed that a predetermined interval is provided in the width direction of the conveyor.

  On the other hand, Patent Document 3 discloses a filter cleaning device. Here, a cleaning nozzle that ejects cleaning water, and a work cradle that supports the object to be cleaned by tilting it to the opposite side of the cleaning nozzle at a predetermined distance from the cleaning nozzle, It is disclosed that the dirty surface of the filter of the cleaning object is disposed on the work cradle side, and one of the cleaning nozzle and the work cradle is moved in parallel by a driving device.

Japanese Patent Publication No. 06-102128 JP 09-122425 A Japanese Patent No. 2839286

  The means for cleaning the mesh filter, for example, water cleaning with a high-pressure air jetter, vacuum suction, sifting using a vibrator, scraping with a brush, etc. There is a problem that it is insufficient to remove the foreign matter adhering to the filter of the air conditioning filter using.

  In other words, the foreign matter collected in the medium-performance or high-performance air-conditioning filter is attached to the fiber surface or between the fibers of the filter medium constituting the filter, so the foreign matter must be peeled off from the fiber and discharged from the filter. There is. On the other hand, foreign matters adhering to the fibers cannot be sufficiently peeled off by water washing with a high-pressure air jetter, suction by a vacuum, sifting (striking) using a vibrator or the like. Moreover, in scraping off with a brush, there exists a problem that the friction by a brush will damage a filter medium.

  In addition, the ultrasonic cleaning system used for cleaning medium-performance or high-performance air-conditioning filters using filter media requires large-scale equipment and consumes high power. It becomes a problem. Also, the supercritical carbon dioxide cleaning system requires a large device, special equipment is required because of the special equipment, continuous operation is difficult, or a single cleaning filter is required. There are problems such as limited number of sheets and poor productivity.

  Furthermore, as described later, the filter cleaning device disclosed in Patent Document 2 resists the liquid from being accumulated on the surface of the filter because the liquid is continuously ejected, and the high-pressure air from extruding foreign matter between the fibers. There is a problem that the cleaning effect is reduced. In addition, there is a problem in that the liquid is continuously ejected and the water is immersed in the filter medium to form a water film, and the injected high-pressure air blocks the inside of the filter medium from being cut vertically, and the effect of pushing out foreign matters is reduced. is there.

  The purpose of the present application is to provide a high-performance and compact filter cleaning apparatus and filter cleaning method that solves such problems, effectively cleans the inside of the filter medium of the filter, and extrudes foreign matter collected inside the filter medium. .

  In order to achieve the above object, a filter cleaning apparatus according to the present invention includes a filter transport unit that transports a filter, a cleaning liquid spray nozzle that sprays a cleaning liquid onto a filter on a transport surface of the filter transport unit, and a transport surface of the filter transport unit The upper filter includes a high-pressure gas injection nozzle that injects only the high-pressure gas downstream of the cleaning liquid injection nozzle.

  With the above configuration, the filter cleaning device allows the cleaning liquid sprayed into the filter by the cleaning liquid spray nozzle to peel off foreign matters from the filter medium and further the high pressure sprayed by the high pressure gas spray nozzle to the filter transferred by the filter transport means. Foreign substances are pushed out of the filter together with the cleaning liquid by the gas. At this time, since the high-pressure gas moves while applying pressure between the fiber surface constituting the filter medium and between the fibers, the foreign matter separated from the fiber surface by the cleaning liquid and the foreign matter between the fibers whose fluidity has been increased by the cleaning liquid are pushed out from the filter. be able to. Thus, the inside of the filter medium of the filter can be effectively cleaned, and a high-performance and compact filter cleaning device can be obtained.

  Moreover, it is preferable that the filter cleaning apparatus is provided with a plurality of sets of cleaning liquid injection nozzles and high-pressure gas injection nozzles as one set of continuous apparatuses. Thereby, for example, the precision of cleaning can be increased stepwise such as preliminary cleaning, rough cleaning, and precision cleaning, and the cleaning effect of the filter can be enhanced.

  Further, in the filter cleaning device, the cleaning liquid injection nozzle is configured by an upper cleaning liquid injection nozzle that injects the cleaning liquid from the upper side to the transferred filter and a lower cleaning liquid injection nozzle that injects the cleaning liquid from the lower side. preferable. As a result, the cleaning liquid is sprayed onto the filter from above and below, and foreign substances can be efficiently separated from the front and back surfaces of the filter medium by the cleaning liquid.

  Moreover, it is preferable that a filter washing | cleaning apparatus is attached to the raising / lowering apparatus to which a washing | cleaning-liquid injection nozzle and a high pressure gas injection nozzle raise / lower with the thickness of the up-down direction of the filter to be transferred. Accordingly, the cleaning liquid and the high-pressure gas can be ejected from the position in the height direction optimum for the filter to be cleaned, to the filters having different vertical thicknesses.

  In the filter cleaning device, it is preferable that the filter transport means includes a belt conveyor and a plurality of roller conveyors that rotate in conjunction with the rotating belt conveyor to transfer the filter. This makes it possible to automate the continuous processing of the filter to be cleaned.

  In order to achieve the above object, a filter cleaning method according to the present invention includes a step of mounting a filter on a filter transport means, a step of spraying a cleaning liquid onto the filter while transporting the filter by the filter transport means, and a filter transport means. And a step of injecting only the high-pressure gas into the filter while being transported by the method.

  With the above configuration, in the filter cleaning method, the cleaning liquid sprayed into the filter by the cleaning liquid spray nozzle is first separated from the filter mounted on the conveyor of the filter transport means, and further sprayed by the high pressure gas spray nozzle. Foreign matter is pushed out of the filter together with the cleaning liquid by the high-pressure gas. At this time, since the high-pressure gas moves while applying pressure between the fiber surface constituting the filter medium and between the fibers, the foreign matter separated from the fiber surface by the cleaning liquid and the foreign matter between the fibers whose fluidity has been increased by the cleaning liquid are pushed out from the filter. be able to. Thus, the inside of the filter medium of the filter can be effectively cleaned, and a high-performance filter cleaning method can be obtained.

  In the filter cleaning method, it is preferable that the step of injecting the cleaning liquid onto the filter and the step of injecting the high-pressure gas onto the filter are repeated a plurality of times as a set of continuous steps. Thereby, for example, the precision of cleaning can be increased stepwise, such as a preliminary cleaning step, a rough cleaning step, and a precision cleaning step, and the cleaning effect of the filter can be enhanced.

  Further, in the filter cleaning method, the cleaning liquid is sprayed to the filter from a set of spray nozzles installed at a predetermined interval in the filter transfer direction on the upper side and lower side of the filter, and the step of spraying the cleaning liquid includes: It is preferable that one injection nozzle is configured to inject the cleaning liquid onto the filter and the other injection nozzle is to inject the cleaning liquid onto the filter. As a result, the cleaning liquid is sprayed onto the filter from above and below, and foreign substances can be efficiently separated from the front and back surfaces of the filter medium by the cleaning liquid.

  As described above, according to the filter cleaning device and the filter cleaning method of the present invention, a high-performance and compact filter cleaning device that effectively cleans the inside of the filter medium of the filter and pushes out the foreign matter collected inside the filter medium, and A filter cleaning method can be provided.

It is explanatory drawing which shows schematic structure of one Embodiment of the filter cleaning apparatus which concerns on this invention from a side surface. It is explanatory drawing which shows the AA cross section of the filter cleaning apparatus of FIG. It is explanatory drawing of the filter washing | cleaning by 1 set of a washing | cleaning-liquid injection nozzle group and a high pressure gas injection nozzle group. It is explanatory drawing which shows the extrusion of the foreign material by the high pressure gas injected from the high pressure gas injection nozzle group in the filter. It is a flowchart which shows schematic structure of basic embodiment of the filter cleaning method which concerns on this invention. It is a flowchart which shows schematic structure in the case of repeating washing | cleaning further in addition to embodiment of FIG. It is a flowchart which shows schematic structure in the case of wash | cleaning from the up-down direction of a filter further in addition to embodiment of FIG.

(Filter cleaning device)
Hereinafter, embodiments of the filter cleaning device 1 according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing a schematic configuration of one embodiment of the filter cleaning device 1 from the side. FIG. 2 is an explanatory diagram showing an AA section of the filter cleaning device 1 of FIG.

  In this embodiment, the filter 2 is an air conditioning filter using a filter medium made of a porous nonwoven fabric mainly composed of chemical fibers, and is a medium performance or high performance air conditioning filter. The filter 2 is attached to, for example, an air intake of a building air conditioner or the like, and collects foreign matters such as dust contained in the sucked air and filters the air. Accordingly, since the filter 2 has a reduced ability to filter air due to foreign matters such as dust adhering to the filter 2, the filter 2 must be removed from the air intake at regular intervals and cleaned. The thickness of the filter 2 using this filter medium is in the range of about 10 mm to about 500 mm, and even fine dust and oil components in the air are collected by the network structure. Depending on the vertical and horizontal sizes of the filter 2, a single or a plurality of filters 2 are housed in a cleaning frame member and mounted on the filter cleaning device 1 for cleaning.

  The filter cleaning apparatus 1 is installed in a casing 19, and includes a conveyor 3 that is a filter transport unit that transfers the filter 2, and a cleaning liquid spray that includes a plurality of cleaning liquid spray nozzles 24 that spray the cleaning liquid onto the filter 2 on the transport surface of the conveyor 3. The nozzle group 4 and the high-pressure gas injection nozzle group 5 including a plurality of high-pressure gas injection nozzles 25 that inject only high-pressure gas on the downstream side of the cleaning liquid injection nozzle group 4 onto the filter 2 on the transport surface of the conveyor 3 are configured. . That is, as will be described later, in the filter cleaning device 1 according to the present invention, the filter 2 to be cleaned is transferred by the conveyor 3, the cleaning liquid is sprayed onto the filter 2 by the cleaning liquid spray nozzle group 4, and high-pressure gas injection is performed downstream thereof. By injecting only high-pressure gas into the filter 2 by the nozzle group 5, it is possible to effectively clean the inside of the filter medium of the filter 2 and to extrude not only the foreign matter separated from the fiber surface but also the foreign matter collected between the fibers. It becomes. The velocity of the high pressure gas ranges from about 50 m / s to about 300 m / s. Here, as shown in FIG. 2, the cleaning liquid injection nozzle group 4 includes a plurality of cleaning liquid injection nozzles 24 arranged in a straight line. The high-pressure gas injection nozzle group 5 is also composed of a plurality of high-pressure gas injection nozzles 25 arranged in a straight line.

  The conveyor 3 includes a belt conveyor including left and right rollers 6 a and 6 b and a belt 7, and a plurality of roller conveyors 8. The filter 2 is transferred in the direction of arrow B in FIG. That is, as shown in FIG. 1, the filter cleaning device 1 is configured such that a belt conveyor in which a belt 7 is wound around a roller 6a and a roller 6b disposed substantially parallel to each other is rolled by a belt drive motor (not shown). It rotates through the shaft 9. The filter 2 is transferred via a belt 7 by a roller conveyor 8 that rotates in conjunction with the rollers 6a and 6b. However, the roller conveyor 8 may be omitted, and the transferred filter 2 may be mounted on the belt 7 and conveyed. In this case, the belt 7 is preferably provided with a plurality of holes through which the cleaning liquid and high-pressure gas flow out.

  In this embodiment, the cleaning liquid injection nozzle group 4 includes upper cleaning liquid injection nozzle groups 4a, 4c, and 4e that inject cleaning liquid from the upper side to the filter 2 to be transferred, and a lower cleaning liquid injection nozzle group that injects cleaning liquid from the lower side. 4b, 4d, 4f. In the present embodiment, the cleaning of the filter 2 is composed of three areas: a preliminary cleaning area, a rough cleaning area, and a precision cleaning area. In this way, the filter 2 is repeatedly cleaned in stages, and the degree of cleaning is increased by sequentially passing through the preliminary cleaning area, the rough cleaning area, and the precision cleaning area. However, the cleaning of the filter 2 is not limited to the three regions of the pre-cleaning region, the rough cleaning region, and the fine cleaning region, and may be composed of one or two regions, or four or more regions.

  Accordingly, in the pre-cleaning region, the pre-cleaning cleaning liquid spray nozzle group 4a at the upper part of the filter 2, the pre-cleaning cleaning liquid spray nozzle group 4b at the lower part of the filter 2, and the pre-cleaning high-pressure gas spray nozzle group 5a are set as one set. Forming device. Similarly, in the rough cleaning region, a set of a rough cleaning cleaning liquid injection nozzle group 4c above the filter 2, a rough cleaning cleaning liquid injection nozzle group 4d below the filter 2, and a rough cleaning high pressure gas injection nozzle group 5b. Form a cleaning device. Further, in the precision cleaning region, a set of a cleaning liquid spray nozzle group 4e for precision cleaning above the filter 2, a cleaning liquid spray nozzle group 4f for precision cleaning below the filter 2, and a high pressure gas injection nozzle group 5c for precision cleaning are provided. Form a cleaning device.

  The cleaning liquid is supplied from the cleaning liquid tank 10 through the cleaning liquid supply pipe 12 to the cleaning liquid injection nozzle groups 4 a to 4 f in each region of the filter cleaning apparatus 1 by the cleaning liquid pump 11. As shown in FIG. 2, the supply amount of the cleaning liquid is controlled by an injection liquid control device 18 provided in the cleaning liquid injection nozzle groups 4a to 4f, and an appropriate amount of the cleaning liquid is supplied. As shown in FIG. 2, a plurality of cleaning liquid injection nozzles 24 are attached to the cleaning liquid injection nozzle groups 4 a to 4 f in each region in a linear row, and the cleaning liquid is injected substantially uniformly over the entire width direction of the filter 2. To do. In the present embodiment shown in FIG. 2, the cleaning liquid spray nozzle group 4a is composed of seven cleaning liquid spray nozzles 24, but is not limited to this number.

  Similarly, high-pressure gas is supplied from the high-pressure gas tank 13 via the high-pressure gas supply pipe 14 to the high-pressure gas injection nozzle groups 5 a to 5 c in each region of the filter cleaning device 1. The supply amount of the high-pressure gas is controlled by a high-pressure gas control device (not shown) provided in the high-pressure gas injection nozzle groups 5a to 5c, and an appropriate amount of high-pressure gas is supplied. A plurality of high-pressure gas injection nozzles 25 are attached in a straight line to the high-pressure gas injection nozzle groups 5 a to 5 c in each region, and inject high-pressure gas substantially uniformly in the entire width direction of the filter 2.

  The cleaning liquid injection nozzle group 4 and the high-pressure gas injection nozzle group 5 are connected to an elevating device 15 that moves up and down in the C direction shown in FIG. Mounted. That is, the thickness (d) in the vertical direction of the transferred filter 2 is in the range of about 10 mm to about 500 mm, and the lifting device 15 has an optimum height for the vertical thickness (d) of the filter 2. The cleaning liquid injection nozzle group 4 and the high pressure gas injection nozzle group 5 are moved up and down from the position in the direction. The lifting device 15 is provided with a ball screw (not shown) and is lifted and lowered in the C direction by a servo motor (not shown), but may be lifted and lowered by another method, for example, a lock cylinder.

(Filter cleaning according to the present invention)
FIG. 3 schematically shows the cleaning of the filter 2 by the pair of cleaning liquid injection nozzles 24a and 24b and the high-pressure gas injection nozzle 25 according to the present invention. The E surface of the filter 2 in FIG. 3 is a surface that becomes a discharge side when attached to an air intake port of a building air conditioner or the like, and the F surface is a surface that becomes an intake side. The X direction in FIG. 3 is the direction of the upper surface, and the Y direction is the direction in which the filter 2 is transferred. That is, for example, the foreign matter 21 sucked in the air intake of a building air conditioner and collected in the nonwoven fabric 20 of the filter 2 is discharged in a direction opposite to the direction sucked by the high-pressure gas injection nozzle 25. The That is, the foreign material 21 is discharged by the high-pressure gas 23 so as to return to the original path direction.

  The filter 2 transferred in the Y direction is first supplied with cleaning liquid by a pre-cleaning cleaning liquid spray nozzle group 4a, a coarse cleaning cleaning liquid spray nozzle group 4c, or a precision cleaning cleaning liquid spray nozzle group 4e provided above the filter 2. Be injected. Thereby, the foreign material 21 collected by the nonwoven fabric 20 on the surface on the E surface side of the filter 2 is immersed in the cleaning liquid 22 and peeled off. Moreover, the foreign material 21 collected by the nonwoven fabric 20 inside the E surface side of the filter 2 is immersed in the cleaning liquid 22 and peeled off. Next, the filter 2 includes a pre-cleaning cleaning liquid spray nozzle group 4b provided below the filter 2 at a position separated by a distance (D) in the Y direction from the pre-cleaning cleaning liquid spray nozzle group 4a, and the like. The cleaning liquid is sprayed by the cleaning liquid spray nozzle group 4d or the precision cleaning cleaning liquid spray nozzle group 4f. Thereby, the foreign material 21 collected on the nonwoven fabric 20 on the surface of the F surface side of the filter 2 is immersed in the cleaning liquid 22 and peeled off. Moreover, the foreign material 21 collected by the nonwoven fabric 20 inside the F surface side of the filter 2 is immersed in the cleaning liquid 22 and peeled off.

  In this way, by spraying the cleaning liquid from the upper surface and the lower surface of the filter 2 with a time difference, both foreign substances 21 collected near the respective surfaces can be effectively separated by the cleaning liquid without colliding with each other. . Further, the cleaning liquid can be uniformly distributed over the entire filter 2 by spraying the cleaning liquid from both sides to the foreign matter 21 collected by the non-woven fabric 20 inside the filter 2.

  The filter 2 that has been sprayed with the cleaning liquid 22 and soaked in the cleaning liquid to the inside is further pressurized by a high pressure gas injection nozzle group 5a for preliminary cleaning, a high pressure gas injection nozzle group 5b for rough cleaning, or a high pressure gas injection nozzle group 5c for precision cleaning. Gas is injected. FIG. 4 schematically shows how the foreign matter 21 is pushed out by the high-pressure gas 23 injected from the high-pressure gas injection nozzle group 5 into the filter 2.

  FIG. 4A schematically shows a mechanism for pushing out the foreign substance 21 only by the high-pressure gas 23 injected from the high-pressure gas injection nozzle groups 5 a, 5 b, and 5 c to the filter 2. Since the high-pressure gas 23 injected from the high-pressure gas injection nozzle 25 has less resistance than the high-pressure water in the filter 2, the high-pressure gas 23 is blown through the filter 2 and blown through the filter 2, and the foreign matter 21 collected in the nonwoven fabric 20 inside the filter 2. Is pushed out by the pressure. At this time, the foreign matter 21 collected in the nonwoven fabric 20 is immersed in the cleaning liquid 22 and peeled off, so that the mobility between the fibers is improved, and the outside of the filter 2 can be easily removed together with the cleaning liquid 22 by the pressure of the high-pressure gas 23. Pushed out.

  On the other hand, FIG. 4B schematically shows a mechanism for injecting high-pressure air and high-pressure water into the filter 2 simultaneously as described in Patent Document 2. In this case, since the high-pressure water 29 is continuously discharged to the filter 2, a water pool 26 is generated on the surface of the filter 2, and the high-pressure air is blocked from blowing through the filter 2 longitudinally. Further, since the high-pressure water 29 is continuously discharged, a water film 27 is partially formed inside the filter 2 and blocks the high-pressure air from passing through the filter 2 through the filter 2. From this, the foreign material 21 collected by the nonwoven fabric 20 can be efficiently extruded by using only the high-pressure gas 23 without using the high-pressure water 29 as in the filter cleaning device 1 according to the present invention.

(Filter cleaning method)
5 to 7 are flowcharts showing the filter cleaning method according to the present invention. FIG. 5 is a basic flowchart of the filter cleaning method. FIG. 6 is a flowchart for repeated cleaning. Furthermore, FIG. 7 is a flowchart in the case of injecting the cleaning liquid from above and below the filter 2. Each step indicates the order of the filter cleaning method by adding a number to the symbol “S” indicating the step.

  First, as shown in FIG. 5, the filter 2 to be cleaned is mounted on a conveyor 3 which is a filter conveying means (S1). Next, the cleaning liquid is sprayed onto the filter 2 while the filter 2 is conveyed by the conveyor 3 (S2). Further, only the high-pressure gas is sprayed onto the filter 2 while conveying the filter 2 by the conveyor 3 (S3). Then, if there is a filter 2 to be cleaned next, the process returns to Step 1, and if not, the process ends (S4).

  Here, the step (S2) of injecting the cleaning liquid onto the filter 2 and the step (S3) of injecting the high-pressure gas onto the filter 2 are a set of continuous steps, and are repeated three times in this embodiment. That is, a preliminary cleaning step, a rough cleaning step, and a fine cleaning step. However, this set of successive steps is not limited to three times of the preliminary cleaning step, the rough cleaning step, and the fine cleaning step, but may be one or two cleaning steps, or four or more cleaning steps. There may be.

  The steps described above are the flowchart shown in FIG. That is, the filter 2 to be cleaned is mounted on the conveyor 3 which is a filter conveying means (S1). First, in the preliminary cleaning step, cleaning liquid is sprayed onto the filter 2 as preliminary cleaning (S2a), and only the high-pressure gas is sprayed onto the filter 2 (S2b). Next, in the rough cleaning step, the cleaning liquid is sprayed onto the filter 2 as rough cleaning (S3a), and only the high-pressure gas is sprayed onto the filter 2 (S3b). Further, in the precision cleaning step, the cleaning liquid is sprayed onto the filter 2 as precision cleaning (S4a), and only the high-pressure gas is sprayed onto the filter 2 (S4b). Then, if there is a filter 2 to be cleaned next, the process returns to Step 1, and if not, the process ends (S5).

  Further, the cleaning liquid is sprayed to the filter 2 from a pair of cleaning liquid spray nozzle groups 4 installed at a predetermined interval in the transfer direction of the filter 2 on the upper side and the lower side of the filter 2, and the step of spraying the cleaning liquid includes The one cleaning liquid injection nozzle group 4 injects the cleaning liquid onto the filter 2 and the other cleaning liquid injection nozzle group 4 injects the cleaning liquid onto the filter 2.

The steps described above are the flowchart shown in FIG. The filter 2 to be cleaned is mounted on the conveyor 3 which is a filter conveying means (S1). In the pre-cleaning step, as pre-cleaning, cleaning liquid is sprayed onto the filter 2 from above (S2a ₁ ), cleaning liquid is sprayed onto the filter 2 from below (S2a ₂ ), and only high-pressure gas is sprayed onto the filter 2 (S2b). Next, in the rough cleaning step, as the rough cleaning, the cleaning liquid is sprayed onto the filter 2 from the upper side (S3a ₁ ), the cleaning liquid is sprayed onto the filter 2 from the lower side (S3a ₂ ), and only the high-pressure gas is sprayed onto the filter 2 ( S3b). Further, in the precision cleaning step, the cleaning liquid is sprayed onto the filter 2 as precision cleaning (S4a ₁ ), the cleaning liquid is sprayed onto the filter 2 (S4a ₂ ), and only the high-pressure gas is sprayed onto the filter 2 (S4b). Then, if there is a filter 2 to be cleaned next, the process returns to Step 1, and if not, the process ends (S5). In this flowchart, the order of cleaning liquid injection from the upper side of the filter 2 and the step of cleaning liquid injection from the lower side may be reversed.

  In addition to the embodiment of FIG. 5, the flowchart in the case of further cleaning from the vertical direction of the filter is apparent from each of the flowcharts described above, and thus the description thereof is omitted.

  1 Filter cleaning device, 2 filter, 3 conveyor, 4 cleaning liquid spray nozzle group, 4a pre-cleaning cleaning liquid spray nozzle group (upper part), 4b pre-cleaning cleaning liquid spray nozzle group (lower part), 4c rough cleaning cleaning liquid spray nozzle group ( Upper part), 4d Cleaning liquid injection nozzle group for rough cleaning (lower part), 4e Cleaning liquid injection nozzle group for upper part cleaning (upper part), 4f Cleaning liquid injection nozzle group for lower part cleaning (lower part), 5 High pressure gas injection nozzle group, 5a For pre-cleaning High pressure gas injection nozzle group, 5b High pressure gas injection nozzle group for rough cleaning, 5c High pressure gas injection nozzle group for precision cleaning, 6a, 6b Roller, 7 belt, 8 roller conveyor, 9 roller shaft, 10 cleaning liquid tank, 11 cleaning liquid pump, 12 Cleaning liquid supply pipe, 13 High-pressure gas tank, 14 High-pressure gas supply pipe, 15 Lifting device, 16 Mounting base, 17 Support Bar, 18 Injection liquid control device, 19 Casing, 20 Non-woven fabric, 21 Foreign material, 22 Cleaning liquid, 23 High pressure gas, 24a, 24b Cleaning liquid injection nozzle, 25 High pressure gas injection nozzle, 26 Puddle, 27 Water film, 28 Gas liquid injection nozzle 29 High pressure water.

Claims (8)

Filter transport means for transporting the filter;
A cleaning liquid spray nozzle that sprays cleaning liquid onto the filter on the transport surface of the filter transport means;
A high-pressure gas injection nozzle that injects only the high-pressure gas downstream of the cleaning liquid injection nozzle into the filter on the transfer surface of the filter transfer means;
A filter cleaning apparatus comprising:   2. The filter cleaning apparatus according to claim 1, wherein a plurality of sets of cleaning liquid injection nozzles and high-pressure gas injection nozzles are provided as one set of continuous apparatuses.   3. The filter cleaning apparatus according to claim 1, wherein the cleaning liquid injection nozzle includes an upper cleaning liquid injection nozzle that injects the cleaning liquid from the upper side and a lower cleaning liquid injection nozzle that injects the cleaning liquid from the lower side. And a filter cleaning device.   The filter cleaning apparatus according to any one of claims 1 to 3, wherein the cleaning liquid injection nozzle and the high-pressure gas injection nozzle are attached to a lifting device that moves up and down depending on a thickness in a vertical direction of the transferred filter. Filter cleaning device.   5. The filter cleaning device according to claim 1, wherein the filter transport means includes a belt conveyor and a plurality of roller conveyors that rotate in conjunction with the rotating belt conveyor to transfer the filter. A filter cleaning device characterized by comprising. Mounting the filter on the filter transport means;
Spraying the cleaning liquid onto the filter while transporting the filter by the filter transport means;
And a step of injecting only the high-pressure gas into the filter while transporting the filter by the filter transporting means.   7. The filter cleaning method according to claim 6, wherein the step of injecting the cleaning liquid to the filter and the step of injecting the high-pressure gas to the filter are repeated a plurality of times as a set of continuous steps. Cleaning method.   8. The filter cleaning method according to claim 6, wherein the cleaning liquid is sprayed to the filter from a set of spray nozzles disposed at a predetermined interval in the filter transfer direction on the upper side and the lower side of the filter. The step of injecting the cleaning liquid comprises a step in which one of the injection nozzles injects the cleaning liquid onto the filter, and a step in which the other injection nozzle injects the cleaning liquid onto the filter.

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