JP2562679B2 - Air filter member - Google Patents

Description

The present invention relates to an air filter member incorporated in an air blower such as an air conditioner.

(B) Conventional technology An air filter composed of a first air filter having a mesh fixed to a frame and a second air filter having a charged charging net and an activated carbon net integrated with each other is incorporated into an air conditioner. This is disclosed in Japanese Utility Model Laid-Open No. 60-74719. With such a configuration, the first air filter removes dust (relatively large dust in the room), and the second air filter removes granular dust (small dust in the room) and odor, respectively. I am trying to improve the air cleaning capacity.

(C) Problem to be Solved by the Invention Small dust in the room that has passed through the first air filter surely adheres to the second air filter.

Therefore, the second air filter is likely to be clogged. Therefore, it is usually necessary to replace the second air filter several times a year, which may increase the running cost of the air conditioner.

The present invention is intended to solve the above problems.

(D) Means for Solving the Problems In order to achieve this object, the present invention stacks these charging filters so that the charging filter with thick fibers is on the primary side and the charging filter with thin fibers is on the secondary side. It is designed to fit.

(E) Action Among the dust in the air that passes through the filter member, large ones are attached to the primary side filter with high charge density, and small ones are attached to the secondary side with low charge density. Is difficult to occur.

(F) Embodiment The drawings show an embodiment of the present invention. In FIGS. 1 and 2, reference numeral 1 is a housing of an indoor unit of a separation type air conditioner, which is attached to a wall surface in a room. The housing 1 is composed of a machine body 2, an exterior cover 3 attached to the front surface of the machine body 2, and a decorative plate 5 attached to the cover 3 and having a suction port 4 on the front surface. Reference numeral 6 denotes a cross flow fan housed in the machine body 2, 7 denotes an indoor heat exchanger, and 8 denotes a drain pan arranged below the heat exchanger.

A total of 12 ventilation openings 9 are formed on the front surface of the exterior cover 3, two in the vertical direction and six in the horizontal direction.

Reference numeral 10 is a pre-filter, in which a net 12 is fixed to a frame 11, and a handle 13 is provided below the net 12. This prefilter
In 10, the cotton dust (relatively large fibrous dust in the room) sucked from the suction port 4 is received. 14 is a dust collection filter, and this dust collection filter is the main frame 15
And an auxiliary frame 16 attached to the upper half of this main frame 15,
The air filter member 17 is sandwiched between the two frames.

As shown in FIG. 3, the air filter member 17 has a charging filter 18 and a deodorizing filter 19 overlapped and wrapped by a packaging member 20. The wrapping with the packaging member 20 in this manner makes both the filters 18 and 19 difficult to peel off (the air filter member 17 is integrated) and is easy to handle.

The charging filter 18 is a polypropylene non-woven fabric to which an electric charge is applied.

The deodorizing filter 19 is a reticulated urethane foam to which granular activated carbon is fixed.

The packaging member 20 is made of polypropylene non-woven fabric.

Here, the charging filter 18 is composed of four types (same weight) of fibers 25 having different thicknesses. That is, the cross-sectional shape of the fiber is rectangular as shown in FIG. 4, and the lengths of the short pieces are a and the lengths of the long pieces are b, the dimensions are set as shown in the table below.

In this way, the cross-sectional area (thickness) of the fibers of the first filter 21 is the largest and the cross-sectional area (thickness) becomes smaller (thinner) in order of the second filter 22, the third filter 23, and the fourth filter 24. ing. As a result, the first filter 21 has the coarsest eyes,
The filters of the filter are becoming finer one after another. And the air flows as shown by the solid arrow. Therefore, the first filter 21 is on the primary (leeward) side, and the fourth filter 24 is on the secondary (leeward) side.

The air filter member 17 is sandwiched between the main frame 15 and the auxiliary frame 16 to form the dust collecting filter 14, and is housed together with the pre-filter 10 in the space 23 between the front surface of the exterior cover 3 and the back surface of the decorative plate 4. (See FIGS. 1 and 2).

Then, the room air is sucked through the suction port 4 of the decorative plate 5 and the suction port 26 of the upper surface of the exterior cover 3 by the rotation of the cross flow fan 6. Then, first, the pre-filter 10 collects the dust. Next, the room air from which the dust has been removed is guided to the dust collecting filter 14, and then this air is cooled or heated by the heat exchanger 7 and blown out from the discharge port 27.

Here, in the dust collection filter 14, the first filter (the fiber of the filter has the largest diameter and the electric charge density is large and the mesh is coarse) 21 collects the large-sized granular dust, Small granular dust is collected by the second filter 22, the third filter 23, and the fourth filter 24 whose charge density is decreasing in order. In this way, each filter 21,22,2
Particles 3 and 24 having different diameters are individually collected to prevent the air filter member 17 from being clogged quickly.

In addition, when air is sent only to the third filter 23,
The first filter 21 is superposed on the third filter 23 to form the first filter.
Comparing with the case where air is sent from the filter 21 side (all have the same thickness), the latter has a life of about 20% longer than the former.

When the air filter member 17 is clogged, the auxiliary frame 16 of the dust collecting filter 14 is removed from the main frame 15 and another new air filter member is incorporated in the dust collecting filter 14. The deodorizing filter 19 may be omitted from the air filter member 17.

(G) Effect of the Invention As described above, according to the present invention, since the charging filter having a thick fiber is on the primary side and the charging filter having a thin fiber is on the secondary side, these charging filters are superposed and integrated.
The filter member is less likely to be clogged, the life of the filter member is extended, and the running cost can be kept low. Moreover, the thickness of the air filter member can be reduced by using the charging filter. Further, by integrating the charging filters, these charging filters can be easily taken out together when clogging occurs.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a sectional view of an indoor unit of a separation type air conditioner, Fig. 2 is an exploded perspective view of a main part of the indoor unit, and Fig. 3 is air incorporated in the unit. FIG. 4 is a cross-sectional view of the filter member, and FIG. 4 is a cross-sectional view of fibers of the charging filter of the air filter member. 17 …… Air filter member, 18 …… Charging filter, 21,22,
23,24 …… filter, 25 …… fiber.

Claims (1)

(57) [Claims] 1. In an air filter member in which a plurality of charging filters are superposed and integrated, and air passes through these charging filters in order, the thickness of the fibers of the charging filter on the primary side is the same as that of the charging filter on the secondary side. An air filter member characterized by being made larger than the thickness of the fiber.