JP5641989B2 - Filter cleaning device - Google Patents

Description

  The present invention relates to a structure of a filter cleaning apparatus that cleans and reuses a filter used in an air conditioner.

  In general, a filter is attached to an air intake port 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 and filter the air. This filter removes foreign matter by removing or replacing or cleaning the filter from the air intake at regular intervals, because foreign matter such as dust adheres to the filter surface due to use and the filter's ability to filter air is reduced. Has been done.

  The filter is washed by, for example, water washing with a high-pressure jetter, vacuum suction, sifting (striking) using a vibrator, scraping with a brush, etc., or a combination thereof. There is a problem that work efficiency is low because it is often performed. For this reason, various methods for automatically cleaning the filter have been proposed.

  Patent Document 1 includes a pedestal that leans against a filter and a nozzle that ejects cleaning water toward the filter, and moves either the cradle or the nozzle in parallel to the surface of the filter, A method of cleaning the filter by sequentially spraying cleaning water has been proposed.

  Patent Document 2 proposes a method of ejecting air from an air nozzle onto a filter while conveying the filter by a conveying device, and removing dirt such as dust from a dirty surface of the filter by operating a rotating brush. Yes.

  In Patent Document 3, a plurality of air injection nozzles for injecting high-pressure air onto a transfer path of a filter transferred by a transfer conveyor are provided at predetermined intervals in the width direction of the transfer conveyor, and the filter transfer direction of the air injection nozzles A plurality of gas-liquid injection nozzles for injecting high-pressure water at the downstream side and high-pressure air at the center of the jet of the high-pressure water are provided at predetermined intervals in the width direction of the conveyor, and air is supplied to a filter transferred by the conveyor. After washing the filter by colliding high-pressure air injected from the injection nozzle, the filter is washed with water by colliding high-pressure water and high-pressure air injected from the gas-liquid injection nozzle to the filter on the downstream side in the filter transport direction. Proposed.

  In Patent Document 4, after a filter is transported by a transporting means, first, compressed air is sprayed onto the filter to remove the deposits, and then the high pressure water is ejected toward the filter so that the deposits cannot be removed by the compressed air. It has been proposed to remove the filter and then dry the filter with hot air.

  Patent Document 5 discloses an auxiliary transfer means for transferring an elastically supported roller and a roller belt to a filter upper surface with a dust adhesion surface downward, and a dust suction pipe from the lower surface of the filter with the dust adhesion surface downward. The filter is vibrated in the vertical direction while conveying the filter by the dust suction means for absorbing dust, the vertical vibration means for vibrating the filter up and down by a vibrator, and the brush dust removing means for sliding and removing dust by the brush unit. After removing the filter dust by reciprocating the brush of the unit, the cleaning water is sprayed on the filter by a swinging means that swings a nozzle for spraying cleaning water or cleaning liquid on the filter according to the cross-sectional shape of the filter, and washed with water. There has been proposed a filter cleaning device that removes the cleaning water after cleaning and then circulates and reuses it with a submersible pump.

JP-A-3-26312 Japanese Examined Patent Publication No. 6-102128 JP-A-9-122425 JP 2001-129332 A JP 2002-233721 A

  Incidentally, in recent years, air conditioning filters have been required to remove foreign matters such as finer dust and oil components. Therefore, air-conditioning filters using medium and high-performance filter media are employed as air-conditioning filters with improved foreign substance removal performance. This air-conditioning filter using a filter medium is used to collect fine dust and oil components in the air after attaching a mesh filter with a pre-filter to collect dust, etc. The filter medium contains chemical fibers. It consists of a porous nonwoven fabric as the main component, and collects foreign matter such as fine dust and oil components in the air by its mesh 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”.

  In the air-conditioning filter using such a filter medium, foreign matter adheres between the fiber surfaces of the filter medium constituting the filter or between the fibers. Therefore, as in the prior art described in Patent Documents 1 to 5, high-pressure water or Even if high pressure air collides with the filter and tries to remove the foreign matter attached to the filter by the fluid force, the fluid force does not reach the fiber surface or between the fibers inside the filter medium, and it is difficult to blow off the foreign matter effectively. There was a problem. Also, foreign matter such as oil may stick to the fiber surface of the filter medium or between the fibers, and it cannot be easily blown away with high-pressure air. If a large amount of cleaning water is sprayed on the filter to remove the foreign matter, the surface of the filter In other words, the cleaning water accumulates and the foreign matter inside cannot be removed. Similarly, there has been a problem that it is difficult to remove foreign matter inside the filter medium by brushing out with a brush. For this reason, it was difficult to clean the air-conditioning filter with improved removal performance.

  An object of the present invention is to efficiently clean an air-conditioning filter with improved removal performance.

The filter cleaning device of the present invention is a filter cleaning device that cleans a filter that collects foreign matter with a filter medium in which fibers are entangled in a mesh shape, and transports the filter along a transport path and the transport path At least one cleaning liquid spraying nozzle for spraying a cleaning liquid onto the filter, reducing the adhesion of foreign substances adhering to the fibers inside the filter by infiltrating the cleaning liquid into the filter, and the filter of the cleaning liquid spraying nozzle At least one high-pressure gas injection nozzle that is provided on the downstream side in the conveyance direction and injects high-pressure gas to the filter to push out the foreign matter having reduced adhesion to the fiber to the outside of the filter; The recovery tank disposed on the side and recovering the cleaning liquid sprayed from each cleaning liquid spray nozzle and the foreign matter, and recovered in the recovery tank A circulation system for circulating said each cleaning liquid spray nozzles the solution purification, cleaning stage comprising a are more arranged along the filter conveyance direction, the cleaning stage of the most downstream side of the filter transport direction, the unused cleaning solution An unused cleaning liquid spray nozzle that sprays on the filter and permeates unused cleaning liquid into the filter to separate foreign matter from the surface of the fiber is disposed, and the recovery tank of the cleaning stage is connected to the unused cleaning liquid spray nozzle. A transfer system for recovering the sprayed cleaning liquid and the foreign matter and sequentially transferring the cleaning liquid from the recovery tank of the cleaning stage downstream in the filter transport direction to the recovery tank of the cleaning stage upstream in the filter transport direction; and a drainage system for draining a washing liquid of the recovery tank of the cleaning stage of the upstream side of the delivery to the outside, the washing The liquid spray nozzle includes an upper cleaning liquid spray nozzle disposed on the upper side of the transport path, and a lower side disposed on the lower side of the transport path with a predetermined distance from the upper cleaning liquid spray nozzle with respect to the filter transport direction. And a cleaning liquid spray nozzle .

  In the filter cleaning apparatus of the present invention, it is also preferable that the unused cleaning liquid spray nozzle is a two-fluid nozzle that injects unused cleaning liquid and high-pressure gas simultaneously.

Te filter cleaning apparatus odor of the present invention, it spraying the solution flow from the lower cleaning liquid spray nozzle of the cleaning stage of the filter downstream side is less than the spraying rate of the upper cleaning liquid spray nozzle of the stage, also suitable as It is.

In the filter cleaning apparatus of the present invention, before Kikai yield tanks, comprise an agitator for agitating recovered cleaning liquid, also to be suitable as a cleaning liquid of the recovery tank of the cleaning stage of the filter carrying direction most upstream, It is also preferable that the cleaning stage is discharged when the cleaning capacity becomes lower than a predetermined threshold value, and approximately the same amount of unused cleaning liquid is supplied to the cleaning stage at the most downstream side in the filter transport direction.

  In the filter cleaning apparatus of the present invention, a cover that extends along the transport path, surrounds the transport path, and suppresses splashes of the cleaning liquid sprayed or sprayed toward the filter from being scattered outside. And a blower that exhausts the mist of the cleaning liquid staying inside to the outside, and the blower is arranged to flow the mist inside the cover toward the filter transport direction. This is also preferable.

  The present invention produces an effect that the air-conditioning filter with improved removal performance can be efficiently cleaned.

It is explanatory drawing which shows the structure of the filter washing | cleaning apparatus in embodiment of this invention. It is explanatory drawing which shows the cross section of the preliminary cleaning stage of the filter cleaning apparatus in embodiment of this invention. It is explanatory drawing which shows the state of the filter washing | cleaning in the preliminary washing stage of the filter washing apparatus in embodiment of this invention, and a rough washing stage. It is explanatory drawing which shows the state which blows off a foreign material and a washing | cleaning liquid with the high pressure gas injected from the high pressure gas injection nozzle of the filter cleaning apparatus in embodiment of this invention. It is explanatory drawing which shows the state of the filter washing | cleaning in the precision washing | cleaning stage of the filter washing | cleaning apparatus in embodiment of this invention. It is explanatory drawing which shows the change of the cleaning power of the cleaning liquid of each cleaning zone of the filter cleaning apparatus in embodiment of this invention, and the change of the magnitude | size of the foreign material to remove.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the filter cleaning device 100 of the present embodiment includes a roller conveyor 9 that is a conveyance path for conveying the filter 2, a belt conveyor 3 that drives the rollers 9 a to 9 e of the roller conveyor 9, and a roller conveyor 9. The filter carry-in zone 1 arranged in order along the filter conveyance direction, the filter washing zone 4 for washing the filter 2, the filter washing zone 5 for washing the washed filter 2, and ozone water are injected into the filter 2. A filter sterilization zone 6 for sterilizing the filter 2, a filter dewatering zone 7 for removing moisture from the water-containing filter 2, and a filter carry-out zone 8 for taking out and carrying out the filter 2 are included. Between the filter cleaning zone 4 and the filter dewatering zone 7, it is arranged in a casing 81 as a cover, and the filter carry-in zone 1 and the filter carry-out zone 8 are arranged outside the casing 81.

  The filter cleaning zone 4 is provided with three cleaning stages of a preliminary cleaning stage 4a, a rough cleaning stage 4b, and a precision cleaning stage 4c in order along the filter conveyance direction. The preliminary cleaning stage 4a includes cleaning liquid spray nozzles 50a and 50b that spray the cleaning liquid 17a on the filter 2, a high-pressure gas spray nozzle 60a that sprays the high-pressure gas 18 onto the filter 2, and the cleaning liquid sprayed from the cleaning liquid spray nozzles 50a and 50b. A recovery tank 72a for recovering 17a, an agitator 79a for stirring the cleaning liquid 90a stored in the recovery tank 72a, a cleaning liquid circulation pump 73a for circulating the cleaning liquid 90a recovered in the recovery tank 72a to the cleaning liquid spray nozzles 50a and 50b, and It includes a cleaning liquid circulation pipe 74a, a drain pump 77a for draining the cleaning liquid 90a of the recovery tank 72a to the outside, and a drain pipe 78a. The cleaning liquid circulation pump 73a and the cleaning liquid circulation pipe 74a constitute a circulation system, and the drainage pump 77a and the drainage pipe 78a constitute a drainage system.

  The rough cleaning stage 4b includes cleaning liquid spray nozzles 50c and 50d that spray the cleaning liquid 17b on the filter 2, a high-pressure gas spray nozzle 60b that sprays the high-pressure gas 18 on the filter 2, and the cleaning liquid sprayed from the cleaning liquid spray nozzles 50c and 50d. A recovery tank 72b for recovering 17b, a stirrer 79b for stirring the cleaning liquid 90b stored in the recovery tank 72b, a cleaning liquid circulation pump 73b for circulating the cleaning liquid 90b recovered in the recovery tank 72b to the cleaning liquid spray nozzles 50c and 50d, and A cleaning liquid circulation pipe 74b, and a transfer pump 75b and a transfer pipe 76b for transferring the cleaning liquid 90b of the recovery tank 72b to the recovery tank 72a of the preliminary cleaning stage 4a are included. The cleaning liquid circulation pump 73b and the cleaning liquid circulation pipe 74b constitute a circulation system, and the transfer pump 75b and the transfer pipe 76b constitute a transfer system.

  The precision cleaning stage 4c includes cleaning liquid spray nozzles 50e and 50f that spray the cleaning liquid 17c on the filter 2, and an unused cleaning liquid spray nozzle 50g that sprays the unused cleaning liquid 90 stored in the unused cleaning liquid tank 28 toward the filter 2. A high-pressure gas injection nozzle 60c for injecting the high-pressure gas 18 to the filter 2, and a recovery tank 72c for recovering the cleaning liquid 17c sprayed from the cleaning liquid spray nozzles 50e and 50f and the cleaning liquid 17g sprayed from the unused cleaning liquid spray nozzle 50g , A stirrer 79c for stirring the cleaning liquid 90c stored in the recovery tank 72c, a cleaning liquid circulation pump 73c and a cleaning liquid circulation pipe 74c for circulating the cleaning liquid 90c recovered in the recovery tank 72c to the cleaning liquid spray nozzles 50e, 50f, and a recovery tank 72c cleaning liquid 90c is applied to the coarse cleaning stage 4b. And it includes a transfer pump 75c and the transfer pipe 76c to transfer to the tank 72b, a. The cleaning liquid circulation pump 73c and the cleaning liquid circulation pipe 74c constitute a circulation system, and the transfer pump 75c and the transfer pipe 76c constitute a transfer system. The unused cleaning liquid spray nozzle 50g is a two-fluid nozzle that sprays the unused cleaning liquid 90 in the form of a mist and simultaneously jets the high pressure gas 18.

  The cleaning liquid spray nozzles 50a, 50c, 50e spray the cleaning liquids 17a, 17b, 17c from the upper side of the filter 2, and the cleaning liquid spray nozzles 50b, 50d, 50f spray the cleaning liquids 17a, 17b, 17c to the filter 2 from the lower side. To do. The cleaning liquid spray nozzles 50b, 50d, and 50f disposed on the lower side are disposed at positions shifted to the downstream side in the filter transport direction from the cleaning liquid spray nozzles 50a, 50c, and 50e. The high-pressure gas injection nozzles 60a, 60b, and 60c are arranged at positions shifted on the upstream side of the filter 2 from the cleaning liquid spray nozzles 50a, 50c, and 50e on the downstream side in the filter transport direction. The high-pressure gas injection nozzles 60a, 60b, and 60c are connected to a high-pressure gas tank 31 that stores the high-pressure gas 18 and a high-pressure gas pipe 32, respectively. The unused cleaning liquid spray nozzle 50 g and the unused cleaning liquid tank 28 are connected by an unused cleaning liquid supply pipe 30, and an unused cleaning liquid supply pump 29 is attached to the unused cleaning liquid supply pipe 30.

  The filter water washing zone 5 includes washing water spray nozzles 12a and 12b for spraying the water for washing 19 to the filter 2 and a high pressure gas spray nozzle 60d for spraying the high pressure gas 18 to the filter 2, and the filter sterilization zone 6 is used for the filter. Ozone water spray nozzles 21a and 21b for spraying ozone water 22 are included. The flush water 19 is stored in the flush water tank 33, pressurized by the flush water pump 26, and supplied to the flush water spray nozzles 12a and 12b via the flush water pipe 34. The high-pressure gas injection nozzle 60d is disposed downstream of the cleaning water spray nozzles 12a and 12b, and injects the high-pressure gas 18 in the high-pressure gas tank 31 from the upper side of the filter 2. The ozone water 22 is supplied from the ozone water generator 35 to the ozone water spray nozzles 21a and 21b via the ozone water pipe 25. Further, the filter dewatering zone 7 includes an upper water absorption roller 9d and a lower water absorption roller 9e. The upper water absorption roller 9d is moved up and down by an elevating device 23, and the upper water absorption roller 9d depends on the thickness of the filter 2 to be cleaned. The height is adjusted. The lifting device 23 may be moved up and down by rotating a ball screw by a servo motor, or may be moved up and down by other methods such as a cylinder block.

  The conveying roller 9b of the roller conveyor 9 in the filter washing zone 4, the filter washing zone 5, and the filter sterilizing zone 6 and the lower water absorption roller 9e in the filter dewatering zone 7 are driven by the belt conveyor 3b. The roller conveyor 9 in the filter carry-in zone 1 includes a carry-in roller 9a, the roller conveyer 9 in the filter carry-out zone 8 includes a carry-out roller 9c, and the rollers 9a and 9c are driven by belt conveyors 3a and 3c, respectively. Each of the belt conveyors 3a, 3b, and 3c has belts 37a, 37b, and 37c wound around the left and right rollers 36a, 36b, and 36c, and the roller shafts 43 of the rollers 36a, 36b, and 36c are respectively belt drive motors. The belts 37a, 37b, and 37c wound around the rollers 36a, 36b, and 36c are moved by the rotation of the rollers 36a, 36b, and 36c (not shown). Then, the rollers 9a to 9e of the roller conveyor 9 are rotated by the movement of the belts 37a, 37b, and 37c, and the filter 2 is conveyed. The belt 37b passing through the filter cleaning zone 4 is provided with a plurality of holes through which the cleaning liquids 17a to 17c and 17g and the high-pressure gas 18 flow out.

  The casing 81 is provided with a carry-in port 82 for carrying in the filter 2 and a carry-out port 83 through which the filter 2 is carried out. A blower 84 is attached to the upper side of the carry roller 9b on the carry-in port 82 side. An exhaust port 86 for discharging the air in the casing 81 to the outside is provided on the downstream side in the filter transport direction or on the upstream side in the filter transport direction of the filter dewatering zone 7, and a guide vane 85 is attached inside the casing 81 of the exhaust port 86. It has been.

  FIG. 2 shows a cross section of the preliminary cleaning stage 4a in the filter cleaning zone 4 in the filter transport direction. As shown in FIG. 2, a plurality of cleaning liquid spray nozzles 50a and 50b are arranged side by side along the width direction of the filter 2 or the direction perpendicular to the filter transport direction. The cleaning liquid spray nozzle 50a arranged at the upper part is attached to the frame 39, the frame 39 is connected to the lifting device 38 by the connecting rod 40, and the plurality of cleaning liquid spray nozzles 50a can move integrally in the vertical direction. It is configured. The lifting device 38 may be moved up and down by rotating a ball screw by a servo motor, or may be moved up and down by other methods such as a cylinder block. The cleaning liquid spray nozzles 50c, 50d, 50e, and 50f disposed on the rough cleaning stage 4b and the precision cleaning stage 4c and the unused cleaning liquid spray nozzle 50g disposed on the precision cleaning stage 4c have the same configuration. Similarly, the high-pressure gas injection nozzles 60a to 60c arranged in the cleaning stages 4a to 4c have a plurality of injection nozzles arranged in a direction perpendicular to the filter transport direction, and the thickness of the filter 2 to be cleaned by the same lifting device. The height of the injection nozzle may be adjusted according to the above. Further, the washing water spray nozzles 12a and 12b and the high-pressure gas injection nozzle 60d in the filter water washing zone 5 similarly have a plurality of injection nozzles arranged in a direction perpendicular to the filter transport direction, and the thickness of the filter 2 to be cleaned by the same lifting device. The height of the injection nozzle can be adjusted according to the direction.

  A process of cleaning the air-conditioning filter 2 with improved removal performance by the filter cleaning apparatus 100 configured as described above will be described. In the present embodiment, the filter 2 uses a filter medium made of a porous nonwoven fabric 45 mainly composed of chemical fibers, and has a thickness in the range of about 10 mm to about 500 mm. The filter medium has a mesh structure in the air. Even fine dust and oil components are collected. A single filter or a plurality of filters 2 are accommodated in a frame material for cleaning depending on their vertical and horizontal sizes, and are loaded into the filter cleaning device 100 to perform cleaning, water washing, sterilization, and dehydration processes. Initially, the unused cleaning liquid 90 is stored in the collection tanks 72 a, 72 b, 72 c and the unused cleaning liquid tank 28 of the filter cleaning apparatus 100. The unused cleaning liquid 90 may be an alkaline surfactant.

  As shown in FIG. 1, the filter 2 that has been used for a certain period of time and has foreign matter attached to the nonwoven fabric 45 has an E surface on the upper side when attached to an air intake such as an air conditioner of a building on the upper side, It is carried in on the carrying-in roller 9a of the roller conveyor 9 of the filter carrying-in zone 1 so that the F surface to become may become a lower side. The carry-in roller 9 a is rotated by a belt 37 a driven by the roller 36 a and sends the filter 2 to the filter cleaning zone 4.

  The filter 2 enters the filter cleaning zone 4 from the carry-in port 82 of the casing 81 and is transported toward the carry-out port 83 by the transport roller 9b of the roller conveyor 9 rotated by the belt 37b driven by the roller 36b. When it is detected by an infrared sensor (not shown) that the tip of the filter 2 enters the preliminary cleaning stage 4a, the cleaning liquid circulation pump 73a of the preliminary cleaning stage 4a is started, and the cleaning liquid 90a is on the E surface side of the filter 2. Are sprayed on the surface of the filter 2 as a cleaning liquid 17a of fine water droplets, respectively, from the cleaning liquid spray nozzle 50a arranged on the lower side and the lower cleaning liquid spray nozzle 50b which is the F surface side of the filter 2. Further, the high-pressure gas valve of the pre-cleaning stage 4a (not shown) is opened, and the high-pressure gas 18 stored in the high-pressure gas tank 31 is injected from the high-pressure gas injection nozzle 60a. Further, when it is detected that the tip of the filter 2 enters the preliminary cleaning stage 4a, the blower 84 attached to the casing 81 is started, and external air is introduced into the casing 81 by the blower 84. As indicated by a double line arrow 1, air is moved in the conveying direction of the filter 2. The air is bent upward by a guide vane 85 disposed on the downstream side in the filter conveyance direction, and then discharged to the outside from the exhaust port 86.

  As shown in FIG. 3, the cleaning liquid 90a is sprayed on the E surface and F surface of the filter 2 as cleaning liquid 17a containing mist-like water droplets by the cleaning liquid spray nozzles 50a and 50b. The fine water droplet cleaning liquid 17 a penetrates from the respective surfaces through the fibers of the nonwoven fabric 45. And the foreign material 46 collected on the E surface, F surface, and the inside of the filter 2 is immersed in the cleaning liquid 17a, and the adhesion force decreases. As shown in FIG. 3, the cleaning liquid spray nozzle 50a disposed on the upper side and the cleaning liquid spray nozzle 50b disposed on the lower side are separated from each other by a distance D along the conveying direction of the filter 2. First, the upper cleaning liquid spray nozzle The cleaning liquid 17a is sprayed from 50a, and then the cleaning liquid 17a is sprayed from the cleaning liquid spraying nozzle 50b disposed on the lower side. For this reason, the cleaning liquid 17a of fine water droplets sprayed from the cleaning liquid spray nozzles 50a and 50b does not collide, and evenly and deeply between the fibers of the nonwoven fabric 45 from the upper E surface and the lower F surface. The cleaning liquid 17a can be infiltrated. As a result, the foreign matter 46 adhering to the surface of or between the fibers of the nonwoven fabric 45 is evenly immersed in the cleaning liquid 17a, and the adhesion force thereof decreases. The flow rate of the cleaning liquid 17a sprayed from the upper and lower cleaning liquid spray nozzles 50a and 50b is substantially the same or larger than that of the cleaning liquid spray nozzle 50b.

  The cleaning liquid 17a sprayed from the cleaning liquid spray nozzle 50a disposed on the upper side is somewhat in the direction opposite to the normal air suction direction from the E surface on the discharge side of the filter 2 toward the F surface on the suction side. Therefore, when the dynamic pressure of the cleaning liquid 17a is larger than the adhesion force of the foreign matter 46, the foreign matter 46 falls down together with the cleaning liquid 17a and enters the recovery tank 72a from the pan 71a. In most cases, the foreign matter 46 such as dust that is large in size and adhering to the F surface side falls down by the cleaning liquid 17a sprayed from the cleaning liquid spray nozzle 50a disposed on the upper side, and enters the recovery tank 72a. enter.

  The filter 2 in which the cleaning liquid 17a is sprayed from the upper E surface and the lower F surface contains a large amount of the cleaning liquid 17a in the nonwoven fabric 45, and the foreign matter 46 immersed in the cleaning liquid 17a is being transported by the filter 2. Furthermore, the adhesion force decreases. When the filter 2 is conveyed below the high pressure gas injection nozzle 60a, the high pressure gas 18 is injected from the upper E surface of the filter 2 toward the lower F surface as shown in FIG. Then, the cleaning liquid 17a that has entered between the fibers of the non-woven fabric 45 by the dynamic pressure of the high-pressure gas 18 and the foreign matter 46 whose adhesion has been reduced by being immersed in the cleaning liquid 17a are blown downward, and the recovery tank 72a from the pan 71a. Falling into. As the filter 2 is transported, the cleaning liquid 17a and the foreign matter 46 are sequentially blown out by the high-pressure gas 18 from the front end side in the transport direction of the filter 2, and the filter 2 is sequentially cleaned. In the preliminary cleaning stage 4a, the foreign matter 46 such as light dust or large dust is peeled off from the nonwoven fabric 45 by the cleaning and falls into the recovery tank 72a, and the cleaning liquid 17a that has come into contact with the foreign matter 46 accumulates in the recovery tank 72a. . In addition, the stirrer 79a attached to the recovery tank 72a is started so that dust or dust that has fallen into the recovery tank 72a does not accumulate at the bottom of the recovery tank 72a. Accordingly, the cleaning liquid 90a accumulated in the recovery tank 72a can be smoothly circulated from the cleaning liquid circulation pump 73a and the cleaning liquid circulation pipe 74a to the cleaning liquid spray nozzles 50a and 50b.

  Further, in the preliminary cleaning stage 4a, the cleaning liquid 17a formed as fine water droplets is sprayed from the cleaning liquid spray nozzles 50a and 50b. Since the upper side of the transport roller 9b to which the filter 2 is transported is surrounded by the casing 81, the spray of the sprayed fine water droplets of the cleaning liquid 17a does not scatter outside the casing 81, but a part of the cleaning liquid 17a is fogged. It will stay in the space between the conveyance roller 9b of the roller conveyor 9 and the casing 81. If the mist-like cleaning liquid 17a stays in the casing 81 in this way, the infrared beam is blocked and the position of the filter 2 cannot be detected by an infrared sensor (not shown), so the cleaning liquid circulation pump The start / stop of 73a and the opening / closing operation of a high-pressure gas shut-off valve (not shown) cannot be performed. As shown in FIG. 1, in the present embodiment, air is introduced from the outside by a blower 84 disposed on the carry-in inlet 82 side of the casing 81, and the air is caused to flow in the conveying direction of the filter 2. Since the guide vanes 85 arranged on the inlet side are directed upward and discharged to the outside from the exhaust port 86, the mist-like cleaning liquid 17a staying inside the casing 81 is filtered along with the air flow in the filter transport direction. To be discharged from the exhaust port 86 to the outside. As a result, the inside of the casing 81 of the filter cleaning zone 4 can be seen through, the position of the filter 2 can be detected by an infrared sensor (not shown) without being blocked by the infrared beam, and the filter cleaning device 100 is operated without any trouble. be able to. Further, since the mist is configured so as to be directed to the upper side of the casing 81 by the guide vane 85 on the upstream side in the filter conveying direction of the filter dewatering zone 7 together with the air so that it does not flow into the filter dewatering zone 7, The filter 2 can be sufficiently dehydrated in the filter dewatering zone 7 without entering the dehydrated filter 2.

  The filter 2 is transported by the belt conveyor 3b and the transport roller 9b, and the tip of the filter 2 passes through the preliminary cleaning stage 4a and enters the rough cleaning stage 4b. When it is detected by the infrared sensor (not shown) that the tip of the filter 2 enters the rough cleaning stage 4b, the cleaning liquid circulation pump 73b of the rough cleaning stage 4b is started, as in the preliminary cleaning stage 4a, as shown in FIG. The cleaning liquid 90b is sprayed on the surfaces of the E face and F face of the filter 2 from the cleaning liquid spray nozzles 50c and 50d as fine water droplets 17b, and the high pressure gas 18 is moved downward from the E face on the upper side of the filter 2. It is injected toward the F surface. In the rough cleaning stage 4b, the flow rate of the cleaning liquid 17b sprayed from the lower cleaning liquid spray nozzle 50d is smaller than the flow rate of the cleaning liquid 17b sprayed from the upper cleaning liquid spray nozzle 50c, for example, about half. In this way, the amount of spraying of the lower cleaning liquid spray nozzle 50d is made smaller than that of the upper cleaning liquid spray nozzle 50c, so that the foreign matter 46 can enter the filter 2 by the cleaning liquid 17b sprayed from the lower side. The foreign matter 46 can be efficiently dropped onto the lower pan 71b by the next injection of the high-pressure gas 18. As in the pre-cleaning stage 4a, as shown in FIG. 4, as the filter 2 is transported, the cleaning liquid 17b and the foreign matter 46 are sequentially blown downward by the high-pressure gas 18 from the front end side in the transport direction of the filter 2. Then, the filter 2 is washed sequentially. And the foreign material 46 which peeled from the nonwoven fabric 45 by washing | cleaning and the washing | cleaning liquid 17b which contacted the foreign material 46 accumulate in the collection | recovery tank 72b. In addition, the stirrer 79b attached to the recovery tank 72b is started so that dust or dust that has fallen into the recovery tank 72b does not accumulate at the bottom of the recovery tank 72b. Thus, the cleaning liquid 90b accumulated in the recovery tank 72b can be smoothly circulated from the cleaning liquid circulation pump 73b and the cleaning liquid circulation pipe 74b to the cleaning liquid spray nozzles 50c and 50d, and the cleaning liquid 90b is transferred from the transfer pump 75b through the transfer pipe 76b. It can be smoothly transferred to the recovery tank 72a of the preliminary cleaning stage 4a.

  Since the filter 2 is once cleaned by the preliminary cleaning stage 4a and has a large dust, dust, and the like removed, the coarse cleaning stage 4b has a small foreign matter 46 that cannot be removed by the preliminary cleaning stage 4a, or Foreign matter 46 and the like entering between the fibers of the nonwoven fabric 45 are removed. Therefore, finer foreign matters 46 are collected in the collection tank 72b than the collection tank 72a of the preliminary cleaning stage 4a.

  When the filter 2 is conveyed and an infrared sensor (not shown) detects that the rear end of the filter 2 has passed through the rough cleaning stage 4b, the cleaning liquid circulation pump 73b of the rough cleaning stage 4b stops and the cleaning liquid spray nozzles 50c and 50d Spraying of the cleaning liquid 17b is stopped, the high pressure gas valve of the rough cleaning stage (not shown) is closed, and the injection of the high pressure gas 18 from the high pressure gas injection nozzle 60b of the rough cleaning stage 4b is stopped.

  The filter 2 is transported by the belt conveyor 3b and the transport roller 9b, the tip of the filter 2 passes through the rough cleaning stage 4b and enters the precision cleaning stage 4c, and the tip of the filter 2 enters the precision cleaning stage 4c by an infrared sensor (not shown). Is detected, the unused cleaning liquid supply pump 29 is started, and an unused mist-like cleaning liquid 17 g in which the unused cleaning liquid 90 and the air in the high-pressure gas tank 31 are mixed from the unused cleaning liquid spray nozzle 50 g Spray toward E surface. By spraying the unused cleaning liquid 90 and the high-pressure gas 18 together, the unused cleaning liquid 90 can be easily infiltrated into the filter 2, and a smaller amount of unused cleaning liquid 90 is sufficient than simply spraying only the unused cleaning liquid 90. Further, the cleaning liquid circulation pump 73c of the precision cleaning stage 4c is started, and as shown in FIG. 5, the cleaning liquid 90c becomes the cleaning liquid 17c of fine water droplets from the cleaning liquid spray nozzles 50e and 50f, and the E surface and F surface of the filter 2 Sprayed on the surface. In this case, similarly to the rough cleaning stage 4b, the flow rate of the cleaning liquid 17c sprayed from the lower cleaning liquid spray nozzle 50f is smaller than the flow rate of the cleaning liquid 17c sprayed from the upper cleaning liquid spray nozzle 50e. 46 is prevented from entering the inside of the filter 2, and the foreign matter 46 is easily dropped by the subsequent high-pressure gas 18. Similarly to the previous cleaning stages 4a and 4b, the high pressure gas 18 is injected from the high pressure gas injection nozzle 60c toward the lower F surface from the upper E surface of the filter 2. As in the previous cleaning stages 4a and 4b, as the filter 2 is transported, as shown in FIG. 4, the cleaning liquids 17c and 17g and the foreign matter 46 are sequentially generated by the high-pressure gas 18 from the front end side in the transport direction of the filter 2. The filter 2 is blown down to the pan 71c, and the filter 2 is washed sequentially. The foreign matter 46 peeled off from the non-woven fabric 45 by cleaning and the cleaning liquids 17c and 17g that have come into contact with the foreign matter 46 accumulate in the recovery tank 72c. In addition, the stirrer 79c attached to the recovery tank 72c is started so that dust or dust that has fallen into the recovery tank 72c does not accumulate at the bottom of the recovery tank 72c. As a result, the cleaning liquid 90c accumulated in the recovery tank 72c can be smoothly circulated from the cleaning liquid circulation pump 73c and the cleaning liquid circulation pipe 74c to the cleaning liquid spray nozzles 50e and 50f, and the cleaning liquid 90c is transferred from the transfer pump 75c through the transfer pipe 76c. It can be smoothly transferred to the recovery tank 72b of the rough cleaning stage 4b.

  Since the filter 2 is cleaned by the respective cleaning stages 4a and 4b to remove large dust, dust, foreign matter 46 and the like attached to the fibers of the nonwoven fabric 45, there is no gap between the fibers of the nonwoven fabric 45. In the non-woven fabric 45, the foreign matter 46 and the like that cannot be removed by the previous two cleaning stages 4a and 4b are stuck to the fiber surface inside the nonwoven fabric 45. In the precision cleaning stage 4c, the unused cleaning solution 90 that is unused and has a high cleaning power is atomized and sprayed as the cleaning solution 17g, so that a small amount of the unused cleaning solution 17g penetrates into the inside of the nonwoven fabric 45 through the gaps between the fibers. In addition, the foreign matter 46 such as oil adhering to the fiber surface of the nonwoven fabric 45 can be effectively peeled off from the fiber surface. Since the high pressure gas 18 is injected from the high pressure gas injection nozzle 60c from the E surface to the F surface of the filter 2 in this state, the precision cleaning stage 4c cannot be removed by the previous cleaning stages 4a and 4b. The foreign matter 46 such as oil adhering to the surface of the fiber of the nonwoven fabric 45 is removed. Accordingly, finer foreign matter 46 is recovered in the recovery tank 72c than in the recovery tank 72a of the preliminary cleaning stage 4a and the recovery tank 72b of the rough cleaning stage 4b.

  When the filter 2 is conveyed and an infrared sensor (not shown) detects that the rear end of the filter 2 has passed through the precision cleaning stage 4c, the cleaning liquid circulation pump 73c and the unused cleaning liquid supply pump 29 of the precision cleaning stage 4c are stopped. The spraying of the cleaning liquid 17c from the cleaning liquid spray nozzles 50e and 50f and the spraying of the mist-like cleaning liquid 17g from the unused cleaning liquid spray nozzle 50g are stopped, the high pressure gas valve of the precision cleaning stage (not shown) is closed, and the high pressure of the precision cleaning stage 4c is closed. The injection of the high-pressure gas 18 from the gas injection nozzle 60c is stopped.

  The filter 2 that has passed through the precision washing stage 4c is conveyed to the filter washing zone 5, and when it is detected by an infrared sensor (not shown) that the tip of the filter 2 enters the filter washing zone 5, the washing water pump 26 is started. Then, the washing water 19 is sprayed on the surfaces of the E surface and F surface of the filter 2 from the cleaning water spray nozzles 12a and 12b. In the downstream, the high-pressure gas 18 is similarly injected from the high-pressure gas injection nozzle 60 d from the E surface to the F surface of the filter 2 to remove the flush water 19. When the filter 2 is conveyed from the filter water washing zone 5 to the filter sterilization zone 6 and an infrared sensor (not shown) detects that the tip of the filter 2 enters the filter sterilization zone 6, the ozone water generating device The ozone water 22 is supplied from 35 to the ozone water spray nozzles 21a and 21b, and the ozone water 22 is sprayed from the ozone water spray nozzles 21a and 21b to the surfaces of the E surface and F surface of the filter 2. The filter 2 that has been sterilized by passing through the filter sterilization zone 6 is conveyed to the filter dewatering zone 7 and is sandwiched between the water absorption rollers 9e and 9d, and the water contained therein is dehydrated. Further, as described above, the mist staying in the casing 81 is directed to the upper side of the casing 81 by the guide vane 85 on the upstream side in the filter conveying direction of the filter dewatering zone 7 together with the air and does not flow into the filter dewatering zone 7. The mist staying in the casing 81 does not enter the dehydrated filter 2, and the filter 2 can be sufficiently dehydrated in the filter dewatering zone 7. The dehydrated filter 2 is carried out from the carry-out port 83 of the casing 81 to the outside and carried to the filter carry-out zone 8. In the filter carry-out zone 8, the cleaned filter 2 is taken out from the carry-out rollers 9c of the roller conveyor 9.

  As described above, the filter 2 sequentially passes through the preliminary cleaning stage 4a, the rough cleaning stage 4b, and the precision cleaning stage 4c along the filter conveying direction to remove the foreign matters 46, and the removed foreign matters 46 are respectively collected in the collection tank 72a. , 72b, 72c. In the pre-cleaning stage 4a, since dirt and dust that are extremely dirty are removed, the cleaning ability or alkalinity of the cleaning liquid 17a recovered in the recovery tank 72a after contact with the filter 2 is greatly reduced. Conversely, the cleaning power or alkalinity of the cleaning liquid 17c in the precision cleaning zone or the unused cleaning liquid 17g recovered in the recovery tank 72c after contacting the filter 2 that has already been cleaned twice is not significantly reduced. In each cleaning stage 4a, 4b, 4c, the cleaning liquids 17a, 17b, 17c, 17g recovered in the recovery tanks 72a, 72b, 72c are stored in the tanks 72a, 72b, 72c, respectively. Since cleaning is performed by circulating 90b and 90c to the cleaning liquid spray nozzles 50a to 50f by the cleaning liquid circulation pumps 73a, 73b and 73c, the cleaning power or alkali of the cleaning liquid 90a stored in the recovery tank 72a of the preliminary cleaning stage 4a However, the cleaning power or alkalinity of the cleaning liquid 90c stored in the recovery tank 72c of the precision cleaning stage 4c is higher than that of the cleaning liquid 90a stored in the recovery tank 72a of the preliminary cleaning stage 4a. Or there is little fall of alkalinity. The reduction in the cleaning power or alkalinity of the cleaning liquid 90b stored in the recovery tank 72b of the rough cleaning stage 4b is about the middle.

  As shown in FIG. 6, the precision cleaning stage 4c requires a cleaning solution having a high cleaning power or a high alkalinity to remove small oils and the like stuck to the fibers of the nonwoven fabric 45. It is only necessary to remove large dust and dust that can be removed by the collision of the cleaning liquid 17a or by blowing off with the high-pressure gas 18, and it is not necessary to spray a cleaning liquid having high cleaning power or alkalinity as in the precision cleaning stage 4c. The cleaning at the rough cleaning stage 4b is an intermediate cleaning.

  Therefore, when the cleaning power or alkalinity of the cleaning liquid 90a stored in the recovery tank 72a of the preliminary cleaning stage 4a decreases, the drain pump 77a is started and the cleaning liquid 90a stored in the recovery tank 72a of the preliminary cleaning stage 4a is started. A part is discharged to the outside, and the transfer pump 75b of the rough cleaning stage 4b is started to recover the rough cleaning stage 4b having higher cleaning power or alkalinity than the cleaning liquid 90a stored in the recovery tank 72a of the preliminary cleaning stage 4a. The cleaning liquid 90b stored in the tank 72b is transferred from the transfer pipe 76b to the recovery tank 72a of the preliminary cleaning stage 4a, and a reduction in the cleaning power or alkalinity of the cleaning liquid 90a stored in the recovery tank 72a of the preliminary cleaning stage 4a is suppressed. To do.

  Similarly, the transfer pump 75c of the precision cleaning stage 4c is started and stored in the recovery tank 72c of the precision cleaning stage 4c having higher cleaning power or alkalinity than the cleaning liquid 90b stored in the recovery tank 72b of the rough cleaning stage 4b. The cleaning liquid 90c is transferred from the transfer pipe 76c to the recovery tank 72b of the rough cleaning stage 4b, and the reduction of the cleaning power or alkalinity of the cleaning liquid 90b stored in the recovery tank 72b of the rough cleaning stage 4b is suppressed. In the precision cleaning stage 4c, the cleaning power or alkalinity of the cleaning liquid 90c stored in the recovery tank 72c can be kept high by recovering the unused cleaning liquid 17g sprayed from the unused cleaning liquid spray nozzle 50g in the recovery tank 72c. it can.

  In this way, the cleaning liquids 90c and 90b are sequentially transferred from the recovery tank 72c of the precision cleaning stage 4c having a high cleaning power or alkalinity to the recovery tank 72b of the rough cleaning stage 4b and the recovery tank 72a of the preliminary cleaning stage 4a in this order. As shown in FIG. 5, the cleaning power or alkalinity of the cleaning liquids 90c, 90b, 90a stored in the respective recovery tanks 72c, 72b, 72a is changed from the precision cleaning stage 4c to the rough cleaning stage 4b, the preliminary cleaning stage according to the necessity. Decrease in steps toward 4a. The drainage amount of the cleaning liquid 90a from the recovery tank 72a of the preliminary cleaning stage 4a is basically the same as the flow rate sprayed from the unused cleaning liquid spray nozzle 50g of the precision cleaning stage 4c.

  For the transfer of the cleaning liquid, the transfer pumps 75b and 75c are used, and when the cleaning liquid 90c in the recovery tank 72c exceeds a certain liquid level due to the spraying of the unused cleaning liquid 90, the transfer pump 75c is started to start the cleaning liquid 90c. Transfer from the recovery tank 72c to the recovery tank 72b. The cleaning liquid 90b in the recovery tank 72b increases due to the transfer of the cleaning liquid 90c. When the amount of the cleaning liquid 90b exceeds a certain level, the transfer pump 75b is started to transfer the cleaning liquid 90b from the recovery tank 72b to the recovery tank 72a. The cleaning liquid 90a in the recovery tank 72a is increased by the transfer of the cleaning liquid 90b, and when the amount of the cleaning liquid 90a exceeds a certain level, the drain pump 77a is started to discharge the cleaning liquid 90a. The levels of the cleaning liquids 90a, 90b, and 90c can be detected by using, for example, a level sensor to start each of the transfer pumps 75b and 75c and the drainage pump 77a, and the levels of the cleaning liquids 90a, 90b, and 90c are lowered below a certain level. At the time, each pump 75b, 75c, 77a stops.

  Further, as a method of adjusting the spray amount of the unused cleaning liquid 90, the unused cleaning liquid 90 of the precision cleaning stage 4c is adjusted so that the cleaning power of the cleaning liquid 90a stored in the recovery tank 72a of the preliminary cleaning stage 4a is reduced to some extent. If the flow rate is determined, that is, the amount of drainage from the recovery tank 72a of the preliminary cleaning stage 4a is determined, the cleaning ability of each of the cleaning liquids 90c, 90b, 90a can be maximized. For example, a PH sensor or the like for detecting the alkalinity is attached to the recovery tank 72a of the preliminary cleaning stage 4a, and the alkalinity of the cleaning liquid 90a stored in the recovery tank 72a is reduced, so that the PH detected by the PH sensor is below a threshold value. In this case, the drain pump 77a is started to discharge the cleaning liquid 90a, and the same amount of unused cleaning liquid 90 is sprayed from the unused cleaning liquid spray nozzle 50g, and the same amount of cleaning liquid is collected from the recovery tank 72c of the precision cleaning stage 4c. 90c may be transferred to the recovery tank 72b of the rough cleaning stage 4b, and the same amount of cleaning liquid 90b may be transferred from the recovery tank 72b of the rough cleaning stage 4b to the recovery tank 72a of the preliminary cleaning stage 4a. In this case, a pipe or a pump may be formed so that the unused cleaning liquid 90 is supplied from the unused cleaning liquid tank 28 to the recovery tank 72c without passing through the unused cleaning liquid injection nozzle 50g.

  As described above, the filter cleaning apparatus 100 according to the present embodiment is configured so that the unused cleaning liquid 90 can be cleaned in the three cleaning stages of precision cleaning, rough cleaning, and preliminary cleaning in accordance with the cleaning power or alkalinity. Since it is used until the cleaning power becomes low, the consumption of the unused cleaning liquid 90 is small, and the air-conditioning filter with improved removal performance can be efficiently cleaned. In the present embodiment, the infrared beam is caused by the mist of the cleaning liquid, the rinsing water, and the sterilizing water staying in the casing 81 by flowing air in the casing 81 in the same direction as the conveying direction of the filter 2. It is possible to suppress the interruption and to automatically detect the transport position of the filter 2 by the infrared sensor and perform the automatic operation.

  In the present embodiment, the filter 2 is cleaned three times as a three-stage configuration of the preliminary cleaning stage 4a, the rough cleaning stage 4b, and the precision cleaning stage 4c. However, the number of stages is not limited to three. It may be four or more. In the present embodiment, the unused cleaning liquid spray nozzle 50g is described as spraying the unused cleaning liquid 90 as a mist-like unused cleaning liquid 17g with high-pressure gas. However, the unused cleaning liquid 90 is sprayed into the filter 2. As long as it can be sprayed, it is not a two-fluid nozzle, but may be a one-fluid nozzle that sprays unused cleaning liquid 90 in a mist form. In the present embodiment, the blower 84 that causes the air in the casing 81 to flow is attached to the inlet 82 side of the casing 81 so as to push the external air into the casing 81. The arrangement is not limited to this, and if the mist staying in the casing 81 is configured to flow toward the filter conveyance direction, for example, the blower 84 is attached to the exhaust port 86 of the casing 81 to The air may be configured to be sucked out, or the air may flow from the carry-in port 82 of the filter 2 of the casing 81 toward the exhaust port 86 without being attached to the casing 81.

  1 Filter carry-in zone, 2 filters, 3, 3a to 3c belt conveyor, 4 filter washing zone, 4a preliminary washing stage, 4b rough washing stage, 4c precision washing stage, 5 filter water washing zone, 6 filter sterilization zone, 7 filter dewatering Zone, 8 filter carry-out zone, 9 roller conveyor, 9a carry-in roller, 9b carry roller, 9c carry-out roller, 9d upper water-absorbing roller, 9e lower water-absorbing roller, 12a, 12b washing water spray nozzle, 17a-17c, 17g washing liquid, 18 high pressure Gas, 19 Flushing water, 21a, 21b Ozone water spray nozzle, 22 Ozone water, 23, 38 Lifting device, 25 Ozone water piping, 26 Flush water pump, 28 Unused washing liquid tank, 29 Unused washing liquid supply pump, 30 Unused Cleaning liquid supply pipe, 31 high-pressure gas 32, high pressure gas piping, 33 flush water tank, 34 flush water piping, 35 ozone water generator, 36a-36c roller, 37a-37c belt, 39 frame, 40 connecting rod, 43 roller shaft, 45 nonwoven fabric, 46 foreign matter, 50a-50f Cleaning liquid spray nozzle, 50g Unused cleaning liquid spray nozzle, 60a-60d High pressure gas injection nozzle, 71a-71c Pan, 72a-72c Recovery tank, 73a-73c Cleaning liquid circulation pump, 74a-74c Cleaning liquid circulation piping, 75b, 75c Transfer pump, 76b, 76c Transfer pipe, 77a Drain pump, 78a Drain pipe, 79a-79c Stirrer, 81 Casing, 82 Carry-in, 83 Cargo-out, 84 Blower, 85 Guide vane, 86 Exhaust, 90 Unused cleaning liquid, 90a ~ 90c Cleaning solution, 100 Filter cleaning device.

Claims (7)

A filter cleaning device for cleaning a filter that collects foreign matters by a filter medium in which fibers are entangled in a mesh shape,
A transport path for transporting the filter;
At least one cleaning liquid spraying nozzle for spraying cleaning liquid onto the filter transported along the transport path, and penetrating the cleaning liquid into the filter to reduce the adhesion of foreign substances adhering to the fibers inside the filter; And at least one high-pressure gas injection nozzle that is provided downstream of the cleaning liquid spraying nozzle in the filter transport direction, injects high-pressure gas onto the filter, and pushes out the foreign matter having reduced adhesion to the fibers to the outside of the filter. A recovery tank that is disposed below the conveying path and collects the cleaning liquid and the foreign matters sprayed from the cleaning liquid spray nozzles, and a circulation for circulating the cleaning liquid recovered in the recovery tanks to the cleaning liquid spray nozzles A plurality of cleaning stages including a system are arranged along the filter transport direction ,
The cleaning stage on the most downstream side in the filter transport direction sprays an unused cleaning liquid onto the filter, and permeates the unused cleaning liquid into the filter to separate foreign matter from the surface of the fiber, thereby cleaning the unused cleaning liquid spray nozzle. And the recovery tank of the cleaning stage recovers the cleaning liquid sprayed from the unused cleaning liquid spray nozzle and the foreign matter,
A transfer system for sequentially transferring cleaning liquid from the recovery tank of the cleaning stage downstream in the filter transport direction to the recovery tank of the cleaning stage upstream in the filter transport direction;
A drainage system for draining the cleaning liquid of the recovery tank of the cleaning stage on the most upstream side in the filter transport direction to the outside;
Equipped with a,
The cleaning liquid spray nozzle is disposed below the transport path with an upper cleaning liquid spray nozzle disposed above the transport path, and shifted from the upper cleaning liquid spray nozzle by a predetermined interval with respect to the filter transport direction. Side cleaning liquid spray nozzle,
A filter cleaning device characterized by the above. The filter cleaning device according to claim 1,
The unused cleaning liquid spray nozzle is a two-fluid nozzle that simultaneously injects unused cleaning liquid and high-pressure gas;
A filter cleaning device characterized by the above. The filter cleaning device according to claim 1 or 2,
Spraying the solution flow from the lower cleaning liquid spray nozzle of filter downstream side of the cleaning stage it less than spraying flow rate of the upper cleaning liquid spray nozzle of the stage,
A filter cleaning device characterized by the above. The filter cleaning device according to any one of claims 1 to 3,
The recovery tank comprises a stirrer for stirring the recovered cleaning liquid;
A filter cleaning device characterized by the above. The filter cleaning device according to any one of claims 1 to 4,
The cleaning liquid in the recovery tank of the cleaning stage that is upstream in the filter transport direction is discharged when the cleaning capacity is lower than a predetermined threshold value, and approximately the same amount of unused cleaning liquid is left in the cleaning downstream of the filter transport direction. Being supplied on stage,
A filter cleaning device characterized by the above. The filter cleaning device according to any one of claims 1 to 5,
A cover that extends along the transport path, surrounds the transport path, and suppresses splashes of the cleaning liquid sprayed or sprayed toward the filter from being scattered outside;
A blower that exhausts the mist of the cleaning liquid staying in the cover to the outside;
A filter cleaning apparatus comprising: The filter cleaning device according to claim 6,
The said air blower is arrange | positioned so that the said mist inside the said cover may flow toward a filter conveyance direction, The filter washing | cleaning apparatus characterized by the above-mentioned.

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