JPH02259338A - Air filter - Google Patents

Abstract

PURPOSE:To provide an air filter free from clogging and restricting any increased resistance of aeration by a method wherein a corrugated plate member in the air filter having some holes formed of piled-up layers of the corrugated plate member applied as an aeration passage is formed by an electrically charged member. CONSTITUTION:An electrical charging filter 17 is made such that a flat plate member and a corrugated plate member are adhered to each other. Some small holes are formed at a front surface and a rear surface. Such an air filter as above is assembled in an interior unit 1, the interior air is flowed in the air filter 8 as indicated by a solid arrow line. Accordingly, the interior air flows in the holes of the electrical charged filter 17, minute dusts in the interior air are adhered to an inner wall of each of the holes. Air having some small dusts removed flows out of the holes in the electrical charged filter 17, odor is collected with a deodoring filter 16, thereafter the air is heated or cooled through an interior heat exchanger 4 and then the air is blown out of the discharging port 10. Accordingly, it is possible to make a large passage area for air in the air filter 8, prevent the air filter 8 from being plugged and further to restrict increase in aeration resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an air filter that is incorporated into an air conditioner or the like.

(B) Prior Art Conventionally, as an air filter incorporated into an air conditioner, there is disclosed Utility Model Application No. 60-74719. In this publication, a first air filter having a mesh fixed to a frame and a second air filter having a charged grid fixed to the frame are stacked and assembled into an air conditioner. Then, relatively large indoor fibrous dust (cotton dust) is removed by the first air filter, and small indoor dust is removed by the second air filter, thereby improving the air purifying ability of the air conditioner. There is.

(c) Problems to be Solved by the Invention Since small indoor dust that has been removed will definitely adhere to this second air filter, this second air filter is likely to become clogged. If the air conditioner was not cleaned frequently, the heating and cooling capacity of the air conditioner could decrease.

An object of the present invention is to provide an air filter that is less likely to become clogged and that suppresses an increase in ventilation resistance.

(d) Means for Solving the Problems In order to achieve this object, the present invention uses a corrugated member made of an electrically charged material, and configures a filter element by laminating these members. The holes formed by this lamination function as ventilation passages.

In addition, opposite electrodes are made to face the entrance and exit of the hole of this filter element, or opposite electrodes are embedded within this filter element.

(*) Because the filter element is made of a material that has an active charge, dust in the air that flows into the hole in this element adheres to the inner wall of the hole, and air from which dust has been removed flows out from the hole. .

In addition, by providing opposing electrodes at the outlet and inlet of the holes of the filter element or within the filter element, an electric field is created around the filter element, and the dust in the air flowing into the filter element is charged. This dust tends to adhere to this workpiece/ment.

Embodiment 1 In FIG. 1, reference numeral 1 denotes an indoor unit of a separate air conditioner, and a housing is formed of a main body 2 and a front cover 3 attached to the front surface of the main body 2. 4 is a heat exchanger, 5
6 is a blower, 6 is a wind direction changing plate, 7 is a pre-filter attached to the back surface of the front cover 3, and 8 is an air filter provided on the front surface of the heat exchanger 4. The rotation of the blower 5 causes indoor air to flow as indicated by the solid arrow. That is, the prefilter 7 removes relatively large ms-shaped dust (cotton dust) from the air sucked in from the suction port 9 of the front cover 3, and the air filter 8 removes small dust.

The air from which dust has been removed in this way is heated or cooled by the heat exchanger 4, and then blown out from the discharge port 10.

The front cover 3 pivots diagonally upward as shown by the dashed-dotted line arrow using the hinge 11 as a fulcrum, and the air filter 8 can be removed from the main body 2.

Here, the air filter 8 has a structure as shown in FIG. In FIG. 2, reference numeral 12 denotes a main frame, and a handle 13 is formed at the bottom thereof. 14 is a hammer-shaped negative electrode attached to this main frame, 15 is this negative electrode 14
This is the electrode terminal.

Reference numeral 16 denotes a deodorizing filter housed within the main frame 12, which is made of reticulated urethane foam with granular activated carbon fixed thereto. 17 is a band 1 placed on this deodorizing filter 16
It is a filter (filter element).

This charged filter 17 is made by laminating a flat plate-like member 18 and a corrugated plate-like member 19, and has a large number of small holes 20 on the front and back sides.

Here, the flat plate member 18 is an adhesive tape, and the corrugated member 19 is a polypropylene nonwoven fabric (trade name: Nishintex EL, Mitsui Petrochemical Chemical Co., Ltd. Kogyo Co., Ltd.) was heat-sealed and then bent into a corrugated shape. 21 is a supplementary frame,
22 is a positive electrode attached to this auxiliary frame 21, and 23 is an electrode terminal of this positive electrode 22. By combining this auxiliary frame 21 with the main frame 12,
A deodorizing filter 16 and a charged filter 17 are installed in both frames 12 and 21.
and are sandwiched together (see Fig. 1). In Fig. 3, 24 is a rectifying high voltage device, and the picture electrode terminal 15.2
3 to which a voltage of several kilovolts is applied. As a result, an electric field is formed between the picture electrodes 14 and 22, and the dust in the air between the two electrodes is charged, so that the dust tends to adhere to the charged filter 17.

When such an air filter 8 is installed in the indoor unit 1, the indoor air relative to the air filter 8 is as shown by the solid line arrow (
(See Figure 2).

Therefore, indoor air flows through the holes 20 of the charged filter 17. At this time, small dust particles in the indoor air adhere to the inner wall of the hole 20. Then, the air from which small dust has been removed flows out from the holes of the charged filter 17, and the deodorizing filter 1
The odor is collected in step 6, heated or cooled in indoor heat exchanger 4, and blown out from discharge port 10.

In the air filter 8 having such a structure, the granular activated carbon fixed to the reticulated urethane foam of the deodorizing filter 16 has conductivity, so when the granular activated carbon comes into contact with the negative electrode 14, this granular activated carbon also acts as a negative electrode. As a result, a voltage of several kilovolts is applied across the charged filter 17. Note that this negative electrode 14 may be provided between the deodorizing filter 16 and the charged filter 17.Furthermore, the flat plate member 18 of the charged filter 17 is also charged on the mesh-shaped reinforcing net in the same way as the corrugated plate member 19. The corrugated plate member 18 and the flat plate member 19 may be bonded together by heat-sealing a polypropylene non-woven fabric provided with a polypropylene.

In addition, the charged filter has a flat plate member 1 as shown in FIG.
9 and a corrugated sheet member 18 may be wound in an elliptical shape. In the charged filter 40 formed by winding in an elliptical shape in this way, the corrugated sheet member 18 also provides holes 25 that serve as ventilation passages. are formed in large numbers.

Next, the above-mentioned positive electrode 22 and negative electrode 14 may be provided as shown in FIGS. 5 and 6, that is, 26 is a charged filter, and 19 is a corrugated plate shape similar to the above-mentioned embodiment. The component is a mesh-shaped reinforcing net that is combined with electrically charged polypropylene nonwoven fabric. 27
is one flat plate-like member, and the left end 28 protrudes from the left side surface of the charged filter 26. 29 is the other flat member;
The right end 30 protrudes from the right side surface of the charged filter 26. The one flat plate member 27 and the other flat plate member 29 are alternately arranged with the corrugated plate member 19 in between. Here, one and the other flat plate members 27 and 29 are made by bonding aluminum foil 31 to a resin film 30, as shown in FIG. 6, and the width dimension A of this aluminum foil 31 is st.
It is set smaller than the width dimension B of the m film 30.

Note that the width dimensions A and B of both may be made to match. In one flat member 27 , the left end 28 has a dimension C that protrudes from the left side of the charged filter 26 , and in the other flat member 29 , the right end 30 has a dimension C that projects from the right side of the charged filter 26 . I try to do that.

Therefore, when this charged filter 26 is housed in the filter case 32, the left end 28 of one flat member 27 is connected to one electrode terminal 33 provided in this case 32, and the left end 28 of one flat member 27 is connected to the other electrode terminal 34 of the other flat member. The right end 30 of the two-handed plate-like member 27.
The aluminum foil 31 of No. 29 serves as an electrode to form an electric field within the charged filter 26. In this way, the charged filter 26
An electrode may be incorporated inside.

FIG. 7 shows a charged filter 41 formed by overlapping and winding two of the members shown in FIG. 6 (the flat member 27 and the corrugated member 18). The charged filter 41 can reduce the contact area between the electrode terminals 33, 34 and the aluminum foil 31 compared to the charged filter 26 shown in FIG.

(G) Effects of the Invention As described above, the present invention involves molding a corrugated member from a charged material, laminating these members to form a filter element, and filling holes formed by this lamination. By allowing air to flow through the air filter, the air passage area in the air filter is increased, making it easier for dust from this air to adhere to the inner wall of the hole, making it difficult for the air filter to become clogged, thereby suppressing an increase in ventilation resistance. I can do it.

In addition, opposing electrodes are placed facing the entrance and exit of the pores of this filter element, or opposing electrodes are embedded within this filter element to form an electric field around and inside the element. , it is possible to reliably collect dust in the air flowing through the holes of the element.

[Brief explanation of drawings]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a sectional view of an indoor unit of a separate air conditioner incorporating an air filter, and FIG. Figure 3 is an exploded perspective view of the air filter, Figure 4 is a perspective view of the air filter.
The figure is a perspective view of an air filter showing a second embodiment of the invention, FIG. 5 is an explanatory diagram of an air filter showing a third embodiment of the invention, and FIG. 6 is an air filter shown in FIG. FIG. 7 is a perspective view of an air filter showing a fourth embodiment. 8.40.41...Filter element (band! filter), 14.22...Electrode, 31...Aluminum foil (electrode), 18...Corrugated sheet member, 20,25.
...hole.

Claims (1)

[Scope of Claims] 1) In an air filter in which a filter element is constructed by laminating corrugated sheet members, and a hole formed by the lamination of the corrugated sheet members serves as a ventilation passage, the corrugated sheet member is electrically charged. An air filter characterized by being molded from a material that has a tinge of color. 2) In an air filter in which a filter element is constructed by laminating corrugated sheet members, and a hole formed by the lamination of the corrugated sheet members serves as a ventilation passage, the corrugated sheet member is formed of an electrically charged material. In addition, an air filter characterized in that opposite electrodes are provided at the entrance and exit of the hole, respectively. 3) In an air filter in which a filter element is constructed by laminating corrugated sheet members, and holes formed by the lamination of the corrugated sheet members are used as ventilation passages, the corrugated sheet members are formed of an electrically charged material. Also, an air filter characterized in that opposing electrodes are incorporated within the filter element.