JP2865331B2 - Air filter - Google Patents

Description

The present invention relates to an air filter incorporated in an air conditioner or the like.

(B) Prior art The applicant has proposed Japanese Patent Application No. 1-80139 as an example showing the structure of an air filter incorporated in an air conditioner.

In this proposal, opposing electrodes are arranged on the primary side and the secondary side of the filter element.

Then, by applying a voltage to the electrode, an electric field is created around the filter element, and the dust in the air flowing into the filter element is charged, so that the dust easily adheres to the filter element. Was.

(C) Problems to be Solved by the Invention In such an air filter, when the thickness of the filter element increases, the distance between the electrodes increases, the strength (magnetic force) of the electric field decreases, and dust adheres to the filter element. In some cases. In order to increase the strength (magnetic force) of the electric field, it is conceivable to increase the voltage (applied voltage) applied to both electrodes. However, safety (electric shock or the like) may be impaired by the increase in the voltage.

An object of the present invention is to maintain the strength (magnetic force) of an electric field generated around an air filter and suppress the dust from becoming difficult to adhere to the filter element.

(D) Means for Solving the Problems In order to achieve this object, the present invention includes a non-conductive corrugated plate-like member in which a charging member is mixed, and a conductive plate-like member, The corrugated plate-like member is sandwiched between two flat plate-shaped members such that one flat member abuts on the crest of the corrugated plate-like member and the other flat member abuts on the trough of the corrugated plate-like member. A hole formed between the member and the corrugated member is used as a ventilation path, and electrodes having polarities different from each other are provided on the flat plate member opposed to the corrugated member.

(E) Action A flat plate member having electrodes of different polarities attached to both sides of the corrugated plate member is arranged, and a hole between the corrugated plate member and the flat plate member is used as a ventilation path. The ventilation path can be lengthened without changing the interval between the plate members, and the dimension between the two electrodes can be maintained even when the depth dimension of the air filter is increased and the ventilation path in the air filter is extended.

(F) Embodiment In FIG. 4, reference numeral 1 denotes an indoor unit of a separation type air conditioner, which is formed of a main body 2, a front cover attached to the front surface of the main body 2, and a housing. 4 is a heat exchanger, 5 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 the room air to flow as indicated by the solid arrow.
That is, relatively large fibrous dust (wat dust) in the air sucked from the suction port 9 of the front cover 3 is removed by the pre-filter 7 and small dust is removed by the air filter 8. The air from which dust has been removed in this way is heated or cooled in the heat exchanger 4 and blown out from the discharge port 10.

The front cover 3 rotates obliquely upward with the hinge 11 as a fulcrum, as indicated by a dashed line arrow, so that the air filter 8 can be removed from the main body 2.

Here, the air filter 8 has a structure as shown in FIG. 1 and FIG. In FIG. 1, reference numeral 12 denotes a handle provided below the air filter 8, and reference numeral 13 denotes a filter element housed in the air filter 8. 14 is located on the left side of this air filter (provided in the indoor unit 1)
The plus terminal 15 is a minus terminal similarly located on the right side of the air filter. 16 is a rectifying high pressure device,
A voltage of several KV is applied to both terminals 14,15.

Here, the filter element 13 is obtained by alternately stacking a pair of flat members 17, 18 and a corrugated member 19,
As a result, each peak 20 of the corrugated plate 19 is connected to one flat plate member 17 and each valley 21 is connected to the other flat plate member 18. In other words, the corrugated member 19 is sandwiched between the two plate members 17,18. And these flat members 1
A hole 22 formed by the corrugated members 19 forms a ventilation path.

More specifically, in FIG.
Is composed of a tape-shaped polypropylene net 23 having conductivity (containing carbon) and a charged fiber 24 attached to the net, and these two are integrated by heat fusion. Things. On the other hand, the corrugated plate member 19 is composed of a corrugated polypropylene net 25 having no conductivity (containing no carbon) and a charged fiber 26 attached to the net. It is integrated by fusion. As shown in FIG. 1, the first and third from the top, that is, the left end 27 of the odd-numbered (one) flat plate member 17 protrudes from the left side of the filter element 13, and the left end 27 contacts the positive terminal 14, The right end 28 of the second and fourth, that is, even-numbered (other) flat plate members 18 project from the right side of the filter element 13 so that the right end 28 contacts the minus terminal 15.

Therefore, the odd-numbered (one) plate-like member 17 acts as a positive electrode, and the even-numbered (other) plate-like member 18 acts as a negative electrode. Between the electrodes. When a voltage is applied to the two opposing electrodes, an electric field is formed on each of the corrugated members 19.

Since the corrugated member 19 is sandwiched between the two opposing electrodes in this manner, if the height H of the corrugated member 19 is changed, that is, the corrugated member having a small height H is changed. When used, the strength (magnetic force) of the electric field can be made greater than when a corrugated member having a large height dimension H is used (in a state where the voltage applied to the two electrodes is kept constant). . Even if the depth A of the corrugated member 19 is increased as shown in FIG. 3, the depth B of the electrodes (the flat members 17 and 18) is increased in accordance with the size, and If the height dimension H of the shaped member 19 is not changed, a member having an increased area of a portion that comes into contact with air can be obtained without changing the strength of the electric field. In other words, the depth A of the corrugated member 19 can be increased without changing the height H of the corrugated member 19, so that even when this member is increased in the depth direction, the strength of the electric field is reduced. Without changing, a constant magnetic force always acts on the corrugated plate member 19, and dust adheres to this member.

Activated carbon paper may be used as the flat member 30, as shown in FIG. This activated carbon paper may be used by mixing fibrous activated carbon or powdered activated carbon with pulp, or by fixing activated carbon (fibrous or powdered) on paper. Further, as shown in FIG. 6, the flat plate member 31 is a polypropylene net having no conductivity.
It is also possible to use a combination of the above-described activated carbon paper 34 and the above-mentioned activated fiber 33 fixed to 32. It should be noted that in FIGS.
The same members as those shown in the drawings are denoted by the same reference numerals, and description thereof is omitted.

Further, as shown in FIG. 7, a plate-like member 17, 18, 30, 31 and a corrugated plate-like member 19 are laminated and wound in an elliptical shape, and one of the plate-like members 17 is on the left side and the other is on the other side. If the shape member 18 is on the right side, the number of contact points between the electrodes (plate-like members) 17, 18 and the terminals 35 can be reduced as compared with that shown in FIG.

(G) Effect of the Invention According to the present invention, the corrugated member is formed by two flat members such that one flat member is in contact with the peak of the corrugated member and the other flat member is a valley of the corrugated member. Since the electrodes having different polarities are provided on the flat plate-shaped member which is sandwiched so as to be in contact with the portion and the sheet-shaped member opposed to the corrugated plate-shaped member, the dimension between the two electrodes can be made relatively small. Even if the voltage (applied voltage) applied to the electrode is small, the strength of the electric field (magnetic force) can be maintained at a certain value or more, and dust easily adheres to the filter. Furthermore, since this air filter has a ventilation passage formed between the flat plate member and the corrugated plate member, the ventilation passage of the air filter can be lengthened without changing the dimension between the two electrodes, Even if the depth dimension of the air filter is increased and the ventilation path is lengthened, the strength of the electric field can be kept constant, and dust adheres to the filter.

Also, by reducing the applied voltage, safety such as prevention of electric shock can be improved.

[Brief description of the drawings]

1 to 4 show a first embodiment of the present invention. FIG. 1 is an explanatory view of an air filter, FIG. 2 is an enlarged view of a main part of the air filter, and FIG. FIG. 4 is a sectional view of an indoor unit of a separation type air conditioner in which the filter is incorporated, FIG. 5 is an enlarged view of a main part of an air filter showing a second embodiment of the present invention, and FIG. The figure shows the third embodiment of the present invention.
FIG. 7 is an enlarged view of a main part of an air filter showing an embodiment of the present invention. FIG. 7 is a perspective view of an air filter showing a fourth embodiment of the present invention. 8 ... air filter, 17, 18, 30, 31 ... flat member, 19
... corrugated member, 22 ... hole.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F24F 1/00 371 B03C 3/47

Claims (1)

(57) [Claims] An electroconductive corrugated member having a charging member mixed therein and a conductive plate member, wherein the corrugated member is formed of two flat members by one of the two flat members. Is in contact with the crest of the corrugated plate-like member and the other plate-shaped member is sandwiched so as to contact the valley of the corrugated plate-like member,
In the air filter having a hole formed between the flat plate member and the corrugated plate as a ventilation passage, electrodes having polarities different from each other are provided on the flat plate members opposed to each other across the corrugated plate member. An air filter, characterized in that: