JPS63274426A - Filter unit - Google Patents

Abstract

PURPOSE:To enhance antibacterial and mildewproof effects by introducing an infrared heater or an ultrasonic wave element into a groove-shaped recess in a filter medium which is formed of a zigzag filter unit and also enabling ultraviolet rays to be cast on the groove-shaped recess. CONSTITUTION:When infrared heaters 7 are provided in the grooves 6 of a blowout side in a zigzag passage of a filter medium 2 consisting of a filter material having moderate high performance, sterilization of bacteria collected on the filter medium 2 is effectively performed in a range over all parts of the filter medium 2. Further in the case of washing it, the face of a suction side is sprayed and washed with water and thereafter can be dry-treated by heating it from the rear with the infrared heaters 7. Furthermore slits are provided to the frame bodies of grooves 5 in a suction side and ultraviolet lamps 26 are provided thereto and ultraviolet rays are projected on all parts of the filter medium 2 via a reflector 27 and thereby bacteria living on the filter medium 2 are extirpated.

Description

[Detailed description of the invention] [Industrial application field] The present invention has been improved to have a sterilizing function and a cleaning function,
This invention relates to a filter unit for air purification that has a regeneration function.

[Conventional technology and problems]

Conventionally, it has been proposed to capture sea salt particles using high-performance or ultra-high-performance filters.

Corrosion caused by salt damage has been countered by using corrosion-resistant materials for filter frames, adhesives, gaskets, and other materials.

However, the interaction between sea salt particles and fungal spores has been attracting attention as a major problem. In other words, mold grows abnormally in air-conditioning equipment in seaside areas, and becomes a route of infection to humans. It has been found that this is because sea salt particles have deliquescent properties, which creates temperature and humidity conditions suitable for bacterial implantation and proliferation in areas where sea salt particles accumulate.

This phenomenon is particularly noticeable in air systems where the air system is composed of petrochemical materials. Until now, no air purification device has been found that can cut off the interaction between sea salt particles and mold generation.

Regarding anti-bacterial and anti-mold, there are examples of filter materials using sterilized glass paper, but no measures have been taken against sea salt particles. Furthermore, as mentioned above, it has been proposed to use high-performance or ultra-high-performance filter materials (for particle diameters of 0.1-0.3μ) to collect sea salt particles. The air volume becomes smaller, 5 for example, width 6.
1011II11 x height 610mm x depth 290m
The processing air volume with m filter unit is 25rrr/si
n, which has problems with pressure loss and service life, and is not suitable as a large airflow filter for the intake of outside air into buildings.
Additionally, even if sea salt particles are completely captured, if they are not removed, they can provide a breeding ground for mold, leading to spore dispersal and contamination downstream of the air system. In this case, it has been demonstrated that mold growth occurs in the duct system.

According to research results to date, the particle size of sea salt particles ranges from 1 to 15 μm, but particles with a size of 4 to 6 μm show the highest frequency both near the coast and in inland areas; However, it has been found that the number of particles with slightly larger sizes has increased, and that particles with smaller sizes are more frequent in coastal areas. On the other hand, fungi float in the air in the form of spores, and exist from a minimum of 0.7 μm.

The majority of particles are 1.0 to 2.0 μm in diameter, and generally vary depending on the season, but in subtropical regions such as Okinawa, there is little variation, and the number of filamentous fungi and pollen at 25 meters is 1.
It is said that there are 2,000 to 3,000 pieces per pot. On the other hand, regarding the problem of corrosion caused by sea salt particles,
In Okinawa, this period lasts for eight months, from April to November, and is severe when the humidity is 70% or higher. Furthermore, there is data showing that there are three times as many sea salt particles in Okinawa as in Choshi, for example, which shows how great the correlation between sea salt particles and spores is in Okinawa.

Regarding the mold situation, soil bacteria and plant pathogenic bacteria are the main ones.
Spores in the air settle and propagate in various parts of the air conditioner, and when observing the conditions in which they propagate, it is said that 2 to 3 billion spores are generated in the area of one 100 yen coin, which is also a fungal disease. It is becoming obvious. As mentioned above, the deliquescent action of sea salt particles contributes to their reproduction, and this is further promoted by the presence of dead insects that fly into them.

The present invention aims to solve the serious problems caused by sea salt particles and fungal spores.

[Means for Solving the Problems] The present invention uses a medium-high performance filter material that has a collection efficiency of 92-93% or more for particles with a particle diameter of 0.5-1.0 μm to remove sea salt particles and mold spores. Based on the knowledge that it can sufficiently collect particles, we provide an improved filter unit that uses such medium-high performance filter materials and can be repeatedly sterilized and cleaned.

The gist is that in a filter unit, a sheet-shaped medium-high performance filter medium with an area larger than the area inside the frame is folded back in a zigzag pattern and stretched inside a rectangular filter frame with a front opening and a rear opening. A filter unit in which an infrared heater or an ultrasonic element is inserted into a groove-like depression in a filter medium formed by folding.

The present invention provides a filter unit in which a plurality of ultraviolet lamps are neatly attached so that the groove-shaped recesses are irradiated with ultraviolet rays.

Medium- to high-performance filter materials that can be used in the present invention include glass paper-based and polyolefin-based ultrafine fiber sheets. Conventionally, such filter materials have a thickness of 0.1 to 0.3 μm.
It is used for air treatment that requires high cleanliness as a high-performance filter or ultra-high-performance filter with a collection efficiency of 92 to 93% or more for particles. The present invention uses filter materials with a grade of 0.5 to 1 that is one step lower than high-performance or ultra-high-performance filter materials available on the market, even if the material is the same. .0μ-
It is possible to adopt a device with a collection efficiency of 92 to 93% or more for particles of Good, and 5. Use the device so that the air inflow surface faces downward and the airflow flows from the bottom to the top.
It is effective to supply cleaning water upward to the downward air inflow surface to perform intermittent cleaning, as well as drying and sterilization. A major feature of this method is that the filter material is placed in a zigzag shape within the filter frame, and the depressions in the filter material are effectively used as spaces for sterilization and cleaning. In the present invention, a unitized infrared heater or ultrasonic element is inserted into this recess. In addition, a plurality of ultraviolet lamps are installed so that ultraviolet rays are irradiated into this recess.As the infrared heater used in the present invention, it is recommended to use a rod-shaped heater that emits far-infrared rays or a panel-shaped heater that emits far-infrared rays. preferable.

The structure of the filter unit of the present invention and its preferred method of use will be specifically explained below with reference to the drawings.

FIG. 1 is a perspective view showing the basic shape of a filter unit according to the present invention. 1 indicates a frame body, and 2 indicates a filter medium. The frame body 1 is a rectangular frame with an open front surface (air suction side surface) and rear surface (air blowout side surface). In the present invention, a sheet-shaped filter medium 2 having an area larger than the opening area of the frame 1 is stretched over the frame 1 in a zigzag pattern.

The groove created by the folding is folded back so that it has a width large enough to accommodate an infrared heater, an ultrasonic element, etc., as described later. In the illustrated example, the groove is folded into an angular shape with a folding angle of substantially 90°. A large number of box-shaped grooves are formed on both the air suction side surface and the air blowout side surface. FIG. 2 schematically shows this state. In addition, 1st to 2nd
In the figure, the filter medium 2 is drawn using straight lines, but in reality, the surface is rough and has some jagged edges.Since the drawings would be complicated, subsequent drawings, including Figures 1 and 2, The filter material is also drawn using straight lines.

FIG. 2 shows a state in which the filter medium 2 is folded back in a square zigzag shape and set inside the filter frame l shown by the broken line, with the front opening 3 (opening on the air suction side) of the frame 1 facing downward. This is a schematic sectional view showing the rear opening 4 (opening on the air blowing side) facing upward, and the flow of the air to be treated is shown by arrows. In this example, the front opening 3 is folded back in a square zigzag shape. An example is shown in which the pinch width is the same on both sides and the side of the rear opening 4. This makes it easier to irradiate heating means and radiation for sterilizing or washing and drying the filter medium, which will be explained below. It is possible to simplify the arrangement of various equipment for restoring the regeneration function of the device, and to improve its efficiency. Here, the square groove-like groove on the air suction side formed by folding back into a square shape in a zigzag shape is connected to the suction side groove 5. The rectangular groove-shaped recesses on the air outlet side will be named outlet grooves 6. In the illustrated example, the suction grooves 5 and the outlet grooves 6 are symmetrical to each other, except for those at both ends.

FIG. 3 and FIG. 4, which is a sectional view taken along the line IV-IV, show a configuration in which an infrared heater 7 is inserted into each of the outlet grooves 6. In the illustrated example, three infrared heaters are inserted into each outlet groove 6. 7 is installed in parallel. These infrared heaters 7 are all heaters that emit far infrared rays. In addition, as seen in FIG. 3, the outlet grooves 6a on both sides of the first
6b, since the filter frame 1 is present on one side, a reflecting mirror 8 is interposed between the infrared heater 7 and the frame 1.

FIGS. 5 and 6 are perspective views showing the attachment relationship of the infrared heater 7 in more detail. As seen in these figures, both ends of the infrared heater 7 are fixed to vertical frames 10a and 10b, and horizontal frames lla and llb are stretched over the upper and lower ends of each of the vertical frames 10a and 10b, and the entire infrared heater 7 is This constitutes one heater unit.

Each infrared heater 7 is energized by the vertical frames 10a, 10.
This is done via a terminal (not visible in the diagram) attached to b.
Each terminal is electrically connected to a power supply connection terminal 12a, 12b attached to the upper end of the fir frame 10a, 10b. An infrared heater uni configured in this way.

When installing the vertical frame 10 in the outlet gutter 6,
Rails 13a, 1 with rails 13a and 10b attached to frame 1 in advance
3b, that is, the rails 13a and 13b having the shapes shown in FIGS. 5 and 6 are inserted into the fourth
As shown in the figure, by installing the vertical frames 10a and 10b in advance on the inside of the frame l on both sides of the outlet groove 6 and inserting the vertical frames 10a and 10b into the rails 13a and 13b, infrared rays are transmitted to each outlet side/M6. The heater unit can be installed easily, and each unit has power connection terminals +2a and 12b.
By connecting a power source to each of the infrared heaters 7, electricity is conducted to each of the infrared heaters 7.

Thus, in one embodiment of the filter unit of the present invention, the infrared heater 7 is installed in the outlet groove 6 in the zigzag passage of the filter medium 2.

By installing the infrared heater 7, fungi collected on the filter medium 2 can be effectively sterilized over the entire filter medium 2, and the drying process when the filter medium 2 is washed with water can be easily performed. In particular, when washing the filter door material 2, it is preferable to spray water on its suction side surface for cleaning effectiveness, but the infrared heater 7 is installed in the groove 6 on the outlet side opposite to the suction side. Because of this, water does not come into direct contact with the water during the cleaning operation, and when the power is turned on, heat is applied from the back side to the filter medium 2 that has been washed with the cleaning water, thereby heating and drying it and at the same time imparting a sterilizing effect.

In the above example, the rod-shaped infrared heater 7 (far-infrared cotton heater)
Although the embodiment using the rod-shaped far-infrared heater has been described, it is also possible to use a one-panel far-infrared heater instead of this rod-shaped far-infrared heater and install this in the outlet groove 6 in the zigzag-shaped passage of the filter medium 2. .

Fig. 7 and Fig. 8, which is a sectional view taken along the line ■-■,
Miki's ultrasonic transducer unit 2 is installed in each of the outlet grooves 6.
The configuration with 0 inserted is shown. As seen in FIG. 8, the ultrasonic transducer unit 20 is a linear unit extending along the longitudinal direction of the outlet groove 6. As shown in FIG. As shown in the enlarged view of FIG. 9, a large number of ultrasonic transducers 21 are arranged at predetermined intervals in a conduit 22, and tapered horns 23 are provided on both sides of each ultrasonic transducer 21 where each ultrasonic transducer 21 is located. Install 1
The tip opening of this horn 23 is placed in contact with the door material 1 or in the vicinity thereof. Each ultrasonic transducer 21 is connected to a transmitting circuit (not shown) by a lead wire placed within a conduit 22. In the illustrated example, three linear ultrasonic transducer units 20 configured as described above are housed in the outlet groove 6 in parallel with each other in the depth direction thereof. This accommodation can be easily accommodated by supporting the ends of the three units with a common frame 24 and inserting this frame 24 into the rails 19 previously attached to the inner surface of the frame 1, as shown in FIG. can be done. By transmitting ultrasonic waves from the ultrasonic vibrator 21 in this way and propagating them to the surface of the filter medium via the horn 23.

If the filter medium has a wet surface, the water on the wet surface can be evaporated in the form of mist, and the fine particles that have remained in the filter medium can be collected on the surface of the filter medium by the coagulation effect of ultrasonic waves.
So-called ultrasonic cleaning can be performed. Therefore, as in the case of the infrared heater 7, after the water washing operation is completed, by continuing the operation using the ultrasonic vibrator 21 for a short time, the filter medium 2 can be easily regenerated.

10 and 11 show an embodiment of the present invention in which the suction side groove 5 of the filter medium 2 is irradiated with ultraviolet rays. The example shown in the figure shows an example in which an infrared heater 7 is installed in the outlet gutter 6 described in the third to fourth leaps above, and then UV rays are further irradiated, but it is preferable to only irradiate UV rays without using the 5 infrared heater You can also do that. This ultraviolet irradiation is performed as follows.

That is, a slit 25 is provided in the frame l on one side of the suction side gutter 5, an ultraviolet lamp 26 is installed on the outside of this slit 25, and a reflecting mirror 27 is installed on the frame 1 on the opposite side of the suction side gutter 5. shows. The details of the installation of the ultraviolet lamp 26 are as shown in the partial perspective view of FIG. At the same time, an ultraviolet lamp 26 is installed between the transparent plate 28 and the reflecting mirror 29. As a result, the ultraviolet lamp 26
When turned on, ultraviolet rays pass through the transparent plate 28 to the slit 25.
The ultraviolet rays are irradiated into the suction gutter 5 and reflected by the facing reflector 27 to irradiate the entire filter material 2 constituting the suction gutter 5, thereby eliminating fungi living in the filter door material 2. It can be killed. Although not shown, a power distribution box is provided outside the ultraviolet lamps 26 so as to be connected to the frame 1, so that each ultraviolet lamp 26 is energized.

Furthermore, the reflecting mirror 27 attached to the opposing surface opposite to the ultraviolet lamp 26 can be easily replaced and cleaned by providing a slit 30 in the frame and providing it outside the slit 30.

In this way, since the entire air suction surface of the filter I material 2 is irradiated with ultraviolet rays, most of the fungi collected there can be completely killed. The effect is even more complete, and washing and drying can be carried out in a shorter time. Also,
It is also possible to combine the ultraviolet irradiation means in the suction side groove 5 described in FIGS. 10 to 12 with the ultrasonic wave application means in the blowout side groove 6 described in FIGS. 7 to 9 above.

In this case as well, cleaning, drying and sterilization can be easily performed.

As described above, there is a filter unit of the present invention.

A far-infrared heater or an ultrasonic vibrator is built into the zigzag passage of the filter material, or ultraviolet rays can be irradiated, which can sterilize the fungi collected on the surface of the f-material. It can be easily recycled by cleaning and drying. When using the filter unit of the present invention,
The units may be used in combination according to the MJ, model, and processing air volume of the air treatment equipment. In addition, the filter unit of the present invention can be used with the I material surface in various orientations such as vertical, horizontal, and inclined directions. show.

FIG. 13 is an overall perspective view showing an example of an air purifying device in which the filter unit of the present invention is installed.

31 is a filter unit according to the present invention, 32 is a washing water receiver plate, and 33 is a spray nozzle. In the illustrated device, the filter unit 31 is arranged in three casings 34 in the vertical direction.
An example is shown in which the devices are installed inside each stage, and each stage has substantially the same arrangement.

Each stage of filters is constructed by arranging two filter units 31 of the same shape according to the present invention in parallel.
In addition to the example shown in the figure, any number of filter units can be used in combination depending on the amount of air to be treated, and the number of stages is not limited to that shown in the example. Use it in such a way that it flows. Each filter unit 31 has its air intake surface 35
It is installed at a slight angle at the back so that it faces downwards. A washing water receptacle plate 32 is installed below each filter unit 31, but this plate has an inclination that is opposite to that of the filter unit 31 and is downward toward the front. The lower edge in front of it is connected to one edge of a side gutter 36 installed in the horizontal direction. spray nozzle 3
3 is a downward air intake surface 35 of the filter unit 31
It is installed so that water can be sprayed upwards over the entire surface. In the example shown in FIG. 13, a water supply header 37 is arranged above and almost parallel to the side gutter 36, and a large number of nozzle branch pipes 38 are attached from this water supply header 37, thereby making it possible to provide a large number of spray nozzles 3 at equal intervals. be.

FIG. 14 is a longitudinal sectional view showing the same structure as the device shown in FIG. 13, except that the water supply goo 37 is brought out to the front outside of the casing 34, and the nozzle branch pipe 38 is extended toward the lower surface of the filter. 13, and the same reference numerals as in FIG. 13 indicate the same elements as in FIG. As seen in FIG. 13, an air intake opening 39 is provided on the front surface of the casing 34, and an air extraction opening 40 is provided on the back surface of the casing 34 for each stage. More specifically, the air intake opening 39 is located below the filter unit 31 so that air can flow in toward the bottom surface of the filter unit 31, and the air extraction opening 40 is located below the filter unit 31 so that air can flow in toward the bottom surface of the filter unit 31.
Filter unit 31 so that the air coming out of the
At this time, the upper edge of the cleaning water receiver is placed at the back of the upper filter unit 31 so that the temporary 32 serves as a partition plate that separates the air passages of the filter units 11 in each stage. The lower edge is airtightly connected to the front upper edge of the lower filter unit 31 via a side groove 36. Therefore, the air to be treated taken into the machine from the air intake opening 39 of the casing 34 is directed upward by the plate 32 of the washing water receiver at each stage, and flows from the bottom to the top inside the filter unit 31. After being purified, the washing water receivers on the upper tiers of the second and third tiers are turned horizontally by the plate 32, and by the ceiling surface of the casing 34 in the first tier. The air is taken out from the air extraction opening 40.

The filter unit 31 shown in FIGS. 13 to 14 is.

Although not shown because it would complicate the diagram, it is equipped with the far-infrared heater, ultrasonic vibrator, ultraviolet irradiation lamp, and associated equipment described above. Therefore, according to this air purification device, the filter surface is effectively sterilized and dried by the actions of the far-infrared heater, ultrasonic vibrator, and ultraviolet irradiation lamp described above, and the filter is regenerated by washing with water. By using the filter unit of the present invention, the above-mentioned problems caused by the interaction between sea salt particles and mold spores can be effectively solved.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing the attachment relationship between the frame body and the filter medium of the filter unit of the present invention, and Fig. 2 illustrates the zigzag folded state of the filter medium of the filter unit of the present invention. FIG. 3 is a schematic sectional view showing an embodiment of the present invention in which an infrared heater is inserted into the outlet groove of a filter medium, and FIG. 4 is a sectional view taken along the line IV--IV in FIG. 3. Fig. 5 is a cutaway perspective view showing how the infrared heater unit is installed in the suction side groove, Fig. 6 is a perspective view of the infrared heater unit, and Fig. 7 is the present invention in which an ultrasonic element is inserted into the outlet side groove of the filter medium. 8 is a sectional view taken along the line ■--■ in FIG. 7, and FIG. 9 is an enlarged view of the ultrasonic element portion in FIG. 7. Fig. 10 is a schematic cross-sectional view showing an embodiment of the present invention in which ultraviolet rays are irradiated to the suction side groove of a filter medium, and the 11th is a
- A sectional view taken along the X-ray line; FIG. 12 is a perspective view showing the ultraviolet lamp portion of FIG. 11; FIG. 13 is an overall perspective view showing an example of an air treatment device using the filter unit according to the present invention;
FIG. 14 is a schematic cross-sectional view showing an example of an air treatment device using a filter unit according to the present invention. 1. Filter frame (frame body), 2. Filter medium. 5. Suction side groove, 6. Outlet side groove, 7. Far infrared heater, 21. Ultrasonic vibration element. 26...Ultraviolet lamp, 27...Reflector 28...Transparent plate, 29...Reflector, 31...Filter unit according to the present invention, 32...Washing water receiver is a plate. 33. Spray nozzle. Figure 2 Figure 3 Figure 5 Figure 7 Figure 10 Figure 13 Figure 7Δ MX I A i side

Claims (3)

[Claims] (1) In a filter unit in which a sheet-shaped medium-high performance filter medium having an area larger than the area inside the frame is folded in a zigzag pattern and stretched over a rectangular filter frame having a front opening and a rear opening, the filter material formed by the folding is A filter unit in which an infrared heater or an ultrasonic element is inserted into a groove-like depression in a filter medium. (2) The filter unit according to claim 1, wherein the infrared heater is a far-infrared heater. (3) In a filter unit in which a sheet-like medium-to-high performance filter medium having an area larger than the area inside the frame is folded in a zigzag pattern and stretched over a rectangular filter frame having a front opening and a rear opening, the filter material formed by the folding is A filter unit comprising a plurality of ultraviolet lamps attached to the frame so that ultraviolet rays are irradiated into the groove-like depressions in the filter medium.