JPH04363157A - Air filter device - Google Patents

Abstract

PURPOSE:To obtain the air filter device which is inexpensive and has small air flow resistance. CONSTITUTION:This air filter device has an electrostatic filter 5, electrodes 7, 9 for applying a voltage to this electrostatic filter and a filter 6 which is in contact with these electrodes and has an electrical conductivity and the above-mentioned electrode 9 is formed of metallic wires or the device has the electrostatic filter 5, the electrodes 7, 9 for applying the voltage to this electrostatic filter and the electrode 9 is formed of a filter 6 having the electrical conductivity and, therefore, the use of inexpensive materials and the omission of the electrodes are possible. The inexpensive air filter device is thus obtd. In addition, the use of the extremely fine wires and the omission of the electrodes are possible and, therefore, the air flow resistance is small and the degradation in filtration function by the air flow resistance is minimized.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air filter device in which a voltage is applied to an electrostatic filter.

0002

2. Description of the Related Art As a prior art for an air filter device, there is one proposed by the present applicant in Japanese Patent Application No. 1-280256.

This air filter device 50 is shown in FIG. 7, where 51 is a filter element composed of an electrostatic filter 52 and a deodorizing filter 53, 54 is a positive electrode made of stainless steel, and 55 is a mesh made of expanded metal or aluminum. This is the negative electrode used.

Reference numeral 56 denotes an electrode terminal that is applied to the contact portion 57 of the positive electrode 54, and is attached to an auxiliary frame 58.

Reference numeral 59 denotes an electrode terminal that is applied to the negative electrode 55 and is attached to the main frame 60.

Reference numeral 61 denotes an insulating cover provided with an insulating portion 62 that insulates the contact portion 57 of the positive electrode 54 and the electrostatic filter 52.

[0007] Further, the positive electrode 54 is coated with an insulating coating on a portion other than the contact portion 57.

[0008]

SUMMARY OF THE INVENTION The air filter device 50 described above has the disadvantage that it is expensive because the negative electrode 55 uses an expanded metal or aluminum mesh.

Furthermore, since the negative electrode 55 is made of a fine mesh, there is a drawback that the ventilation resistance is large.

If the negative electrode 5 is formed into a coarse mesh to reduce ventilation resistance, the strength will be insufficient.
Each of the nets in step 5 must be made thicker, which increases the thickness and makes the air filter device larger.

The present invention provides an air filter device that is inexpensive and has low ventilation resistance.

0012

[Means for Solving the Problems] The present invention provides an air filter device including an electrostatic filter, an electrode for applying a voltage to the electrostatic filter, and a conductive filter in contact with the electrode. , the electrode is formed of wire.

Alternatively, the electrostatic filter is provided with an electrostatic filter and an electrode for applying a voltage to the electrostatic filter, and the electrode is formed of a conductive filter.

[0014]

[Operation] In the air filter device according to claim 1,
Since the electrodes are made of wire, they are much cheaper than those made of punched metal or aluminum mesh, and since the wire is very thin, the ventilation resistance is low.

In the air filter device according to the second aspect, since the electrodes are formed of conductive filters, the electrodes can be omitted, and the air filter device is inexpensive. Low ventilation resistance.

[0016]

[Embodiment] An embodiment of the present invention will be explained based on the drawings.

A first embodiment is shown in FIGS. 1 to 4, and 1
1 is an air filter device in which a filter element 4 is sandwiched between a main frame 2 and an auxiliary frame 3 and a voltage is applied thereto.

Reference numeral 5 indicates an electrostatic filter, and reference numeral 6 indicates a conductive filter in which granular activated carbon is adhered to reticulated urethane foam.

Reference numeral 7 designates a wire mesh-like positive electrode attached to the auxiliary frame 3, and 8 designates an electrode terminal of this positive electrode.

Note that the surface of the positive electrode 7 is coated with an insulating material except for the contact portion with the electrode terminal 8.

9 is a negative electrode formed by bending a wire to be attached to the main frame 2; 11 is a protrusion provided to prevent the negative electrode from shifting; and 12 is an electrode terminal of the negative electrode 9. , 13 is a vertical bar provided on the main frame 2, and 14 is a handle provided on the main frame 2.

Note that the negative electrode 9 and the conductive filter 6 are electrically connected.

Reference numeral 15 denotes a rectifying high voltage device, with both electrode terminals 8, 1
2 and a voltage of several kilovolts is applied to it. As a result, an electric field is formed between the electrodes 7 and 9, and the dust in the air between the electrodes is charged, so that the dust tends to adhere to the electrostatic filter 5.

In the air filter device 1 constructed as described above, since the activated carbon of the filter 6 has conductivity, the filter 6 functions in the same way as a negative electrode, and the negative electrode 9 has a smaller area than the conventional one. Even if it is very small,
It has almost the same functions as the conventional one.

Moreover, this negative electrode 9 is much thinner than the conventional one, so the ventilation resistance is very small.
The deterioration of the filtration function of the air filter device 1 can be suppressed as much as possible.

As is clear from FIG. 4, this air filter device 1 has a greater ability to remove dust because the deterioration of the filtering function due to ventilation resistance is suppressed compared to the conventional device.

Furthermore, the negative electrode 9 is much cheaper than the conventional one.

Furthermore, the negative electrode 9 holds down the filter 6 so that it does not come off the main frame 10.

In this first embodiment, the electrostatic filter 5
The electrostatic filter 5 has a conductive filter 6 on one surface thereof, and the negative electrode 9 is made of wire so as to be in contact with the filter. , and a positive electrode and a negative electrode may be formed of wire so as to be connected to these filters.

Further, FIG. 5 shows a second embodiment, in which the same parts as in the first embodiment are denoted by the same reference numbers, and the explanation thereof will be omitted.

20 is an electrode terminal attached to the main frame 2;
The width is much larger than that of the electrode terminal 12, so that even if dust adheres to the electrode terminal 20 or the filter 6, the electrical connection between the two can be easily maintained.

The main frame 2 to which the electrode terminal 20 is attached has a filter 6, an electrostatic filter 5, and a filter 6 shown in FIG.
The auxiliary frame 3 is assembled.

Note that this air filter device is not provided with the negative electrode 9, and the conductive filter 6 functions as the negative electrode.

[0034] In the air filter constructed in this way, since the filter 9 has conductivity, the filter 9 functions as a negative electrode, so that something like the negative electrode 9 is not particularly provided.

[0035] Therefore, the ventilation resistance is much smaller than that of the conventional one.

Furthermore, unlike the conventional device and the first embodiment, since the negative electrode 9 is not provided, the air filter device can be made very inexpensive.

In this second embodiment, only the negative electrode is formed of the conductive filter 6, but both the positive and negative electrodes may be formed of the conductive filter. I don't mind.

Furthermore, the air filter devices of the first and second embodiments can use very small and lightweight materials (wires) and omit component parts (electrodes), so the air filter devices can be made compact. and can be made lighter.

FIG. 6 shows an air conditioner in which this air filter device 1 is incorporated, and 25 is an indoor unit of a separate type air conditioner that is installed on an indoor wall. A housing is formed from the front cover 27.

28 is a heat exchanger, 29 is a blower 30 is a wind direction changing plate, 31 is a pre-filter attached to the back side of the front cover 27, and 1 is an air filter device provided on the front side of the heat exchanger 28.

The rotation of the blower 29 causes the indoor air to flow as indicated by the solid arrow.

That is, relatively large fibrous dust (cotton dust) in the air sucked in from the suction port 32 of the front cover 27
etc. are removed by the pre-filter 31, and small dust is removed by the air filter device 1.

The air from which dust has been removed in this manner is heated or cooled by the heat exchanger 28 and blown out from the discharge port 33.

[0044] The front cover 27 pivots obliquely upward as shown by the dashed-dotted arrow using the hinge 34 as a fulcrum, and the air filter device 1 can be removed from the main body 26.

In the air conditioner configured as described above, the air filter device 1 is slightly lighter in weight than the conventional one, so the indoor unit 25 can also be made slightly lighter and can be mounted on the upper part of the indoor wall. indoor unit 25
This leads to a reduction in the installation work required to install the equipment.

Furthermore, since the air filter device usually has a large ventilation resistance, it is placed far from the blower 29 in a position where the amount of ventilation is small, so there is a possibility that the filtering function of the air filter device will not be fully exhibited.

However, in this indoor unit 25, since the air filter device 1 has a small ventilation resistance, the filtration function is more fully exhibited than in the conventional device.

[0048]

Effects of the Invention The present invention comprises an electrode for applying a voltage to an electrostatic filter and a conductive filter in contact with the electrode, and the electrode is formed of a wire or the electrode is conductive. Since it is made of a filter, inexpensive materials can be used and electrodes can be omitted, making the air filter device inexpensive.

Moreover, since very thin materials can be used and electrodes can be omitted, ventilation resistance is small, and deterioration of the filtration function due to ventilation resistance can be suppressed as much as possible.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an air filter device showing an embodiment of the present invention.

FIG. 2 is a front view showing main parts of the air filter device.

FIG. 3 is a perspective view of the air filter device.

FIG. 4 is a diagram showing the relationship between time and dust.

FIG. 5 is a front view of main parts of an air filter device showing another embodiment of the present invention.

FIG. 6 is a sectional view of an indoor unit of a separate air conditioner incorporating the air filter device of the present invention.

FIG. 7 is an exploded perspective view of a conventional air filter device.

[Explanation of symbols] 1 Air filter device 5 Electrostatic filter 6 Conductive filter [electrode] 7
Electrode 9 Electrode [wire]

Claims (2)

[Claims] 1. A device comprising an electrostatic filter, an electrode for applying voltage to the electrostatic filter, and a conductive filter in contact with the electrode, and the electrode is formed of a wire. Air filter device. 2. An air filter device comprising an electrostatic filter and an electrode for applying a voltage to the electrostatic filter, the electrode being formed of a conductive filter.