JP3411005B2 - Filter cleaning device, filter cleaning method, and filter case for cleaning - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter cleaning device for cleaning a filter for removing dust and the like with ultrasonic waves, a filter cleaning method, and a cleaning filter case.

[0002]

2. Description of the Related Art Conventionally, filters have been provided at air inlets of buildings, underground malls, tunnels, etc. to remove dust, oil, fiber dust and the like contained in the outside air. As this type of filter 31, for example, as shown in FIG. 8, a frame 32, a nonwoven fabric of resin fibers with many pleats, glass fibers, etc. are provided, and are provided in the frame in a bent state. There is a filter material 33 which is present.
These filters 31 are collected and washed at regular intervals, so that dust and the like adhering to the filters are removed and reused. 2. Description of the Related Art As a cleaning device for cleaning a filter, there is a conventional one that emits ultrasonic waves toward the filter (see Japanese Patent Laid-Open No. 11-188322).

As a filter cleaning device utilizing this ultrasonic wave, as shown in FIG. 9, a cleaning tank 34 for accommodating the filter 31 in a state of being immersed in a cleaning liquid, and an ultrasonic filter provided at a position facing the filter 31. The ultrasonic transducer 35 and the filter 31 in a state where ultrasonic waves are emitted from the ultrasonic transducer 35
And a moving device 36 that adjusts the relative distance between the ultrasonic transducer 35 and the ultrasonic transducer 35 in the thickness direction of the filter 31, and thus adjusts the relative distance between the filter 31 and the ultrasonic transducer 35. By doing so, the position where the energy of the ultrasonic wave emitted from the ultrasonic transducer 35 is high, that is, the “belly” part of the ultrasonic wave is adjusted so as to hit the filter 31, and the filter is efficiently cleaned.

[0004]

However, the conventional filter cleaning apparatus using ultrasonic waves determines the appropriate position of the ultrasonic wave by hitting the filter by adjusting the relative distance between the ultrasonic vibrator and the filter. However, in such an apparatus, since the ultrasonic transducer or the filter has to be moved in the thickness direction of the filter, the structure becomes complicated, and the adjustment of the relative distance is not easy.

Therefore, an object of the present invention is to provide a filter cleaning device utilizing ultrasonic waves, a filter cleaning method, and a cleaning filter case which have a simple structure and are easy to operate.

[0006]

In order to achieve the above object, the present invention provides a cleaning tank for accommodating a filter immersed in a cleaning liquid, and a superconducting member provided in a position facing the filter in the cleaning tank. In a filter cleaning device including a sound wave vibrator, the ultrasonic wave vibrator is configured to generate ultrasonic waves of different frequencies.

According to the filter cleaning apparatus of the present invention, by generating ultrasonic waves of different frequencies, for example, the frequency of ultrasonic waves is adjusted without adjusting the relative distance between the ultrasonic transducer and the filter. By adjusting the frequency of the ultrasonic waves with the ultrasonic wave adjusting means, it is possible to easily apply the "belly" portion where the ultrasonic wave energy is high to the filter.

In the filter cleaning device according to the present invention, it is preferable that the ultrasonic transducer is configured to simultaneously generate a plurality of ultrasonic waves having different frequencies. By simultaneously generating ultrasonic waves of different frequencies in this way, it is possible to keep the "belly" portion where the ultrasonic energy is high for a long time, and the "belly" portion where the ultrasonic energy is high is spread over almost the entire thickness direction of the filter. Since it can be applied over the entire length, it is not necessary to adjust the distance between the filter and the ultrasonic transducer in the thickness direction, and the filter can be efficiently cleaned not only on the surface of the filter but also inside.

Further, in the filter cleaning device according to the present invention, it is preferable that the ultrasonic transducer is configured to change the frequency of the ultrasonic wave to be generated at predetermined time intervals. In this way, by changing the frequency of the ultrasonic waves to be generated at predetermined intervals, the position where the "belly" where the ultrasonic energy is high hits the filter can be changed in the thickness direction of the filter. There is no need to adjust the thickness direction of the sonic transducer,
In addition, the "belly" portion where the ultrasonic energy is high can be applied over the entire area of the filter, and efficient cleaning can be performed.

As described above, by simultaneously generating ultrasonic waves of different frequencies or changing the frequency of the ultrasonic waves to be generated at predetermined time intervals, the energy of ultrasonic waves is high regardless of the thickness of the filter. Since the "belly" portion can be applied over almost the entire area in the thickness direction of the filter, for example, when the filters are housed in the cleaning device and the filters are ultrasonically cleaned while automatically conveying a plurality of filters sequentially. Even if the plurality of filters have different sizes, the filters can be placed on the transfer line at the same time.

In the filter cleaning apparatus according to the present invention, it is preferable that the cleaning tank further comprises water flow generating means for generating a water flow in the thickness direction of the filter. By generating the dust, the dust attached to the filter can be easily removed. At this time, it is preferable to store the dirty surface of the filter in the filter cleaning tank so that the dirty surface of the filter faces the downstream side of the water flow.

Further, the water flow generating means is provided outside the cleaning tank and includes water treatment means for removing dirt of the cleaning liquid in the cleaning tank, and the cleaning liquid is passed between the cleaning tank and the water treating means. It is preferable that the filter is configured to generate a water flow in the thickness direction of the filter by circulating it. By circulating the cleaning liquid between the cleaning tank and the water treatment means in this way, dust and the like separated from the filter can be taken out, and by passing through the water treatment means, the cleaning liquid from which dirt has been removed can be removed. It can be supplied into the washing tank. Furthermore, it is preferable that the water treatment generating means is provided with a flow rate adjusting means capable of changing the flow rate of the water flow, and the flow rate is changed according to the degree of contamination of the filter.

It is preferable that the filter cleaning device according to the present invention further comprises a decompressing means for decompressing the inside of the cleaning tank, and the decompressing means is configured so that the inside of the cleaning tank is in a vacuum state. It is preferable. By decompressing or vacuuming the inside of the cleaning tank in this way,
When the filter is immersed in the cleaning solution in the cleaning tank, the air adhering to or contained on the surface or inside of the filter can be removed, so that the cleaning solution can be easily impregnated into the filter, enhancing the cleaning effect and cleaning. The time can be shortened. Further, the depressurizing means may be controlled so as to repeat the depressurized state and the atmospheric pressure state, and by repeating the depressurized state and the atmospheric pressure in this way, dust and the like adhering to the filter can be easily removed.

At least two ultrasonic transducers are provided at positions facing the front and back surfaces of the filter, and the ultrasonic transducers provided at positions facing the front surface and the back surface of the filter are ultrasonic waves alternately. Is preferably configured to generate. By alternately generating ultrasonic waves in this manner, it is possible to change the ultrasonic waves that hit the filter, so that the filter can be stimulated,
Efficient cleaning can be performed.

Further, according to the present invention, in a filter cleaning method for cleaning a filter by generating ultrasonic waves in a filter in a cleaning tank, ultrasonic waves having different frequencies are simultaneously generated, or frequencies are set at predetermined intervals. It is characterized in that it is changed to generate ultrasonic waves.

In the method of cleaning a filter according to the present invention, it is preferable to perform the cleaning in a state where a water flow in the thickness direction of the filter is generated in the cleaning tank, and further to perform the cleaning in a state where the pressure inside the cleaning tank is reduced. Even more preferable.

Further, the present invention relates to a cleaning filter case having a filter case body for fixing the filter when the filter is cleaned by the filter cleaning device, the filter case body having the filter case body. It is characterized in that a supported member that is supported when being lifted is provided. As described above, according to the present invention, by supporting the supported member, the filter case main body can be lifted without directly contacting the filter, so that the filter is not damaged when being moved.

Conventionally, the filter is automatically conveyed by directly sandwiching the filter. However, when transporting filters of different sizes at the same time, it is necessary to adjust the sandwiching width for each size. However, in the case of a thin filter, there is a problem that it is difficult to hold the filter. According to the cleaning filter case of the present invention, since the filter can be conveyed without directly contacting the filter, such a problem does not occur.

In the cleaning filter case according to the present invention, it is preferable that the filter case body is further provided with a floating preventing member for preventing the filter from floating when the filter is immersed in the cleaning liquid. This can prevent the filter from floating when immersed in the cleaning liquid.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a first embodiment of a filter cleaning apparatus according to the present invention will be described. Figure 1 (a)
FIG. 3B is a plan view showing a state in which the filter 1 to be washed by the washing apparatus according to the first embodiment is housed in the washing filter case 2 for fixing the filter, and FIG.
It is the front view and (c) is the side view. The filter 1 is formed in a rectangular parallelepiped shape, and the one shown in FIG. 3 has a regular size (W610 × D290 × H61).
Filter 1 of 0). The filter 1 is made of, for example, non-woven polypropylene fiber, and is used in buildings and the like.

The filter case 2 for cleaning the filter 1 is
It is composed of a metal frame body which covers the filter 1 from the bottom surface and has an upper opening. A pair of arms 3 and 3 project from both sides of the cleaning filter case 2,
The reference numeral 3 is formed in the shape of an inverted triangular triangular prism. The filter 1 is conveyed to the cleaning device while being housed in the cleaning filter case 2, but the filter 1 is moved into the cleaning device while the pair of arms 3 and 3 are supported by the transfer device (not shown). It is carried out by lifting 1 together with the cleaning filter case 2 and moving it forward, backward, leftward and rightward.
In this embodiment, the arms 3 and 3 are provided as the supported members on both side surfaces of the filter case 2, but the present invention is not limited to this. For example, the supported members may be provided on the upper portion of the filter case 2. In this case, it is preferable that the supported member is formed in a shape in which the filter case 2 can be suspended by the transport device.

Further, in the opening above the cleaning filter case 2, metal fixing bands 4 and 4 for fixing the filter 1 from the upper surface when the filter 1 is housed in the cleaning filter case 2 are detachable. A pair of fixing bands 4 and 4 are provided, and when the filter 1 is immersed in the cleaning liquid of the cleaning device in the state where the filter 1 is housed in the cleaning filter case 2, the filter 1 floats up from the cleaning filter case 2. It has a function to prevent it from coming off.

Next, the cleaning apparatus according to the first embodiment will be described with reference to FIG. FIG. 2 is a schematic diagram of the cleaning device 5 according to the first embodiment. The cleaning device 5 includes a cleaning tank 6 that accommodates the filter 1 immersed in a cleaning liquid, ultrasonic transducers 7 a and 7 b provided in the cleaning tank 6 at positions facing the filter 1, and the outside of the cleaning tank 6. A water treatment device 8 provided in the cleaning tank 6 for removing dirt of the cleaning liquid in the washing tank 6, and transport pipes 9a, 9b, 9c for connecting the cleaning tank 6 and the water treatment device 8 to each other.
And a pump 10 that circulates a cleaning liquid in a circulation path formed by the transfer pipe 9a, the cleaning tank 6, the transfer pipe 9b, and the water treatment device 8, and a control device that controls the ultrasonic transducer 7 and the pump 10. 11 is provided.

The cleaning tank 6 is formed in a substantially rectangular parallelepiped shape with an open upper side, and a step 12 protruding outward is formed above the side surface on the downstream side (right side in FIG. 2) of the cleaning tank 6. ing. On the upstream side (on the left side in FIG. 2) of the cleaning tank 6, a supply pipe 13 for supplying the cleaning liquid into the cleaning tank 6 is provided over almost the entire longitudinal direction of the cleaning tank 6, and the supply pipe 1
The lower end 13a of the No. 3 protrudes from the bottom surface of the cleaning tank 6 and is connected to the transfer pipe 9a connected to the pump 10. As shown in FIG. 3, the supply pipe 13 is formed with laterally branched branch pipes 14, 15, and 16. The branch pipes 14, 15, and 16 have supply ports 14a, 15a, and
16a are formed respectively. Step 12 of cleaning tank 6
A first outlet 17 is formed at the bottom surface of the first outlet 17, and the first outlet 17 is connected to a transport pipe 9b connected to the water treatment device 8. Also, the water treatment device 8 and the pump 1
0s are connected by a transport pipe 9c. Therefore, by operating the pump 10, the pump 10 →
The cleaning liquid can be circulated through the transfer pipe 9a → the cleaning tank 6 → the transfer pipe 9b → the water treatment device 8 → the transfer pipe 9c → the pump 10. At this time, the supply pipe 13 in the cleaning tank 6 to the first discharge port 17 A heading water stream can be generated. Further, since the water treatment device 8 is interposed in this circulation path, the cleaning liquid from which dirt and the like have been removed can always be supplied into the cleaning tank 6. Further, a second discharge port 18 for discharging the cleaning liquid in the cleaning tank 6 is provided on the bottom surface on the downstream side of the cleaning tank 6, and the second discharge port 18 is provided with a bulk (not shown). There is. When the cleaning liquid in the cleaning tank 6 is discharged, this bulk is opened. In the present embodiment, the pump 10 is configured so that the flow velocity of the water flow in the cleaning tank 6 can be changed, and the flow velocity is controlled by the control device 11.

The cleaning tank 6 is constructed such that the filter 1 is installed substantially in the center of the cleaning tank 6 with the direction of water flow in the cleaning tank 6 and the thickness direction of the filter 1 being parallel to each other. Between the filter 1 and the supply pipe 13 installed in the cleaning tank 6, four ultrasonic transducers 7a are provided in a state where two ultrasonic transducers 7a are arranged side by side with a slight gap left, right, top, and bottom. Also on the downstream side of the filter 1, four ultrasonic transducers 7b are provided in a state where two ultrasonic transducers 7b are arranged side by side with some gaps vertically and horizontally. The ultrasonic transducers 7a and 7b are supported by the support frames 19a and 19b in a state of facing each other over substantially the entire front surface 1A or back surface 1B of the filter 1 installed in the cleaning tank 6. The upper branch pipe 14 of the supply pipe 13 is
The branch pipe 15 in the middle stage is located at a position higher than the ultrasonic transducers 7a and 7b, and is located at the same height as the vertical gap between the ultrasonic transducers 7a and 7b, and the branch pipe 16 in the lower stage is ,
Since the ultrasonic transducers 7a and 7b are arranged at a position lower than the ultrasonic transducers 7a and 7b, a water flow of the cleaning liquid can be smoothly generated in the cleaning tank 6 through the supply ports 14a, 15a and 16a.

In the first embodiment, the ultrasonic transducer 7a,
As shown in FIG. 4, 7b is configured to generate three kinds of ultrasonic waves (28 kHz, 45 kHz, 100 kHz) having different frequencies and a composite wave that combines these three kinds of ultrasonic waves, and a control device 11, a composite wave is constantly generated, ultrasonic waves of three different frequencies are alternately generated at predetermined time intervals, for example, every 10 seconds, or ultrasonic waves of any one frequency are selected and generated. Is controlled.

When a composite wave is constantly generated, as shown in FIG. 4, the "antinode" where the ultrasonic energy is high can be maintained for a long time, so that the ultrasonic energy is distributed over almost the entire area in the thickness direction of the filter. The high “belly” can be applied, and dust and the like can be efficiently removed from the filter. When the ultrasonic waves of three different frequencies are alternately generated every predetermined time, the position of the "belly" where the ultrasonic energy is high changes the position where it hits the filter in the thickness direction of the filter, so the ultrasonic energy is high. "Belly"
It is possible to apply the above-mentioned portion over the entire area of the filter, and efficient cleaning can be performed. Further, when an ultrasonic wave of any one of the frequencies is selected and generated, the ultrasonic wave having a high "energy" part corresponds to the most dirty part of the filter.

The ultrasonic transducers 7a and 7b are controlled by the control device 11 to simultaneously generate ultrasonic waves or to alternately generate ultrasonic waves at predetermined time intervals, for example, every 5 seconds. When the ultrasonic waves are alternately generated every predetermined time, the ultrasonic waves that hit the filter can be changed, so that the filter can be stimulated and efficient cleaning can be performed.

Next, a second embodiment of the filter cleaning device according to the present invention will be described with reference to FIG. Figure 5
5 is a schematic view of a filter cleaning device according to a second embodiment.
The second embodiment is different from the first embodiment in the filter cleaning device according to the second embodiment. In the second embodiment, a shutter 21 that can seal the inside of the cleaning tank 6 can be opened and closed in an opening 6a on the upper surface of the cleaning tank 6. And a suction port 23 connected to a suction pump 22 for sucking the air in the cleaning tank 6 on the side surface of the step 12. These shutters 2
1 and the suction pump 22 are connected to the control device 11 and controlled by the control device 11.

The filter cleaning device according to the second embodiment is
After housing the filter 1 in the cleaning tank 6, the shutter 21
Is closed to make the inside of the cleaning tank 6 airtight, and the suction pump 22 is operated to suck the air in the cleaning tank 6 from the intake port 23 to reduce the pressure in the cleaning tank 6 or to make it a vacuum state. Wash by treatment. In this way, by cleaning the cleaning tank 6 under reduced pressure or vacuum,
When the filter 1 is immersed in the cleaning liquid in the cleaning tank 6, the air adhering to or contained on the surface or inside of the filter 1 can be removed, so that the cleaning liquid can be easily impregnated into the filter 1 It is possible to efficiently remove dust and the like. Further, at this time, the depressurization or vacuum state and the normal pressure state in the cleaning tank 6 may be repeatedly performed, whereby the dust and the like can be easily removed.

6 (a), 6 (b) and 6 (c) are views showing a state in which a half size filter (W350 × D290 × H610) is housed in the cleaning filter case 2. Two half-size filters are washed while being arranged side by side in the width direction. In the cleaning devices according to the first and second embodiments, the "belly" portion where the ultrasonic energy is high can be applied over almost the entire area in the thickness direction of the filter, and further, the front and back surfaces of the filter can be applied. Since it is configured to apply ultrasonic waves over almost the entire area, it is possible to clean filters of such different sizes.

FIGS. 7A, 7B and 7C are views showing a state in which a thin filter (W300 × D25 × 610) is housed in a cleaning filter case. Figure 7
As shown in (a), when the thin filter 1 is housed in the cleaning tank 6 of the filter cleaning device according to the present invention, it forms a V-shape opening toward the upstream side and is soiled. Four sets are arranged in parallel so that the surface faces the downstream side. Since they are arranged in a V-shape in parallel, the dust attached to the filter can be easily removed by the water flow. Also,
When the thin filter 1 is housed in a V-shaped cleaning filter case, a fixing plate 26 is provided between the fixing band 4 and the filter 1, and the fixing plate 26 stabilizes the thin filter 1 in the V shape. Can be paralleled.

The cleaning apparatus according to the present invention can easily clean filters of sizes other than these by housing them in the cleaning filter case according to the present invention.

[0034]

As described above, according to the present invention, since the ultrasonic waves of different frequencies are generated,
Without adjusting the relative distance between the ultrasonic transducer and the filter,
For example, by adjusting the frequency of the ultrasonic wave with the ultrasonic wave adjusting means for adjusting the frequency of the ultrasonic wave, it is possible to easily apply the "belly" portion where the energy of the ultrasonic wave is high to the filter, and the structure is simple and It is possible to provide an easy-to-use ultrasonic filter cleaning device, a filter cleaning method, and a cleaning filter case.

[Brief description of drawings]

FIG. 1A is a plan view of a cleaning filter case for a regular-sized filter, FIG. 1B is a front view thereof, and FIG. 1C is a side view thereof.

FIG. 2 is a schematic view of a first embodiment of a filter cleaning apparatus according to the present invention.

FIG. 3 is a front view of a supply pipe used in the filter cleaning apparatus according to the first embodiment.

FIG. 4 is a diagram showing wavelengths of ultrasonic waves used in the filter cleaning apparatus according to the first embodiment.

FIG. 5 is a schematic view of a second embodiment of the filter cleaning apparatus according to the present invention.

6A is a plan view of a cleaning filter case for a half-size filter, FIG. 6B is a front view thereof, and FIG. 6C is a side view thereof.

7A is a plan view of a cleaning filter case for a thin filter, FIG. 7B is a front view thereof, and FIG. 7C is a side view thereof.

FIG. 8 is a perspective view of a conventional filter.

FIG. 9 is a perspective view of a conventional filter cleaning device.

[Explanation of symbols]

1 filter 2 Cleaning filter case 3 arms (instructed member) 4 Fixed band (floating prevention member) 6 cleaning tank 7a, 7b Ultrasonic transducer 8 water treatment equipment 22 Suction pump 23 Inlet

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeki Naobayashi 1580 Tabata, Samukawa-cho, Takaza-gun, Kanagawa Yushiro Kagaku Kogyo Co., Ltd. (72) Hideki Negoro 1580 Tabata, Sakawa, Takaza-gu, Kanagawa Pref. In-house (56) Reference JP-A-8-141527 (JP, A) JP-A-2-144181 (JP, A) JP-A-6-47221 (JP, A) JP-A-11-188322 (JP, A) ) JP 2000-176222 (JP, A) JP 5-96111 (JP, A) Actual development 7-572 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B01D 41/00-41/04

Claims (9)

(57) [Claims] 1. A cleaning tank (6) for containing the filter (1) in a state of being immersed in a cleaning liquid, and an ultrasonic transducer (6) provided at a position facing the filter (1) in the cleaning tank (6). 7a, 7b) and the cleaning tank provided outside the cleaning tank (6).
Water treatment means (8) for removing dirt of the cleaning liquid in (6)
And between the cleaning tank (6) and the water treatment means (8)
The cleaning liquid is supplied to the cleaning tank (6) and the water treatment means.
It is circulated between the cleaning tank (6) and the cleaning tank (6).
Water flow generator that generates water flow in the thickness direction of the filter (1)
The ultrasonic transducers (7a, 7b) are configured to generate ultrasonic waves of different frequencies, and the filter cleans the dirty surface of the filter (1).
A filter cleaning device, which is configured to be housed in the cleaning tank (6) toward a downstream side of the water flow in the cleaning tank. 2. The filter cleaning apparatus according to claim 1, wherein the filters (1) are arranged in parallel so as to form a V-shape that opens toward the upstream side. Wherein the ultrasonic transducer (7a, 7b) cleaning apparatus filter of claim 1 or 2, characterized by comprising an ultrasonic adjusting means for adjusting the frequency of the ultrasonic waves generated from. Wherein said ultrasonic transducer (7a, 7b) are different frequencies multiple of the filter according to any one of claims 1 to 3, characterized in that it is configured to generate ultrasonic waves simultaneously Cleaning device. Wherein said ultrasonic transducer (7a, 7b) is a filter according to any one of claims 1 to 3, characterized in that it is configured to cause the frequency of the ultrasonic wave to change every predetermined time Cleaning device. 6. The at least two ultrasonic transducers (7a, 7b) are provided at positions facing the front surface and the back surface of the filter (1), and are provided at positions facing the front surface and the back surface of the filter (1). The ultrasonic transducers (7a, 7) provided
The filter cleaning device according to any one of claims 1 to 5 , wherein b) is configured to alternately generate ultrasonic waves. 7. An ultrasonic wave and a filter are applied to the filter in the cleaning tank.
By generating a flow of cleaning liquid in the thickness direction of the filter
A method of cleaning a filter, comprising:Pass the filter through the dirty surface of the filter.
To the downstream side, the cleaning tank is immersed in the cleaning liquid.
Placed inside, Remove the cleaning liquid from the cleaning tank to remove dirt from the cleaning liquid
While returning the cleaning liquid to the cleaning tank, Multiple ultrasonic waves with different frequenciesIn the cleaning tankGenerate
To clean the filterFilter cleaning characterized by
Method. 8. The method for cleaning a filter according to claim 7, wherein the plurality of ultrasonic waves are simultaneously generated . 9. The plurality of ultrasonic waves are oscillated at predetermined intervals.
The method for cleaning a filter according to claim 7, wherein the number is changed and generated .