JPH03135415A - Air filter - Google Patents

Abstract

PURPOSE:To easily observe the dust stuck on a electrostatic filter by providing the electrostatic filter in the upstream side and a deodorizing filter in the downstream side and making the draft resistance of the deodorizing filter to be uneven. CONSTITUTION:In the air filter in which the electrostatic filter 6 and the deodorizing filter 7 are provided respectively in the upstream side and in the downstream side, the draft resistance of the deodorizing filter 7 is made to be uneven. By making suitable apertures 8 in this deodorizing filter, the performance of the filter is secured without reducing the thickness of the deodorizing filter itself, and the pressure loss of filter is reduced. Moreover, when dust is sufficiently stuck on the surface of the electrostatic filter, the specified shapes A of the apertures come up due to the place of small pressure loss, which informs the exchanging time of filter. Thus, the information of exchanging time is surely and inexpensively obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an air filter incorporated into an air conditioner or the like.

<Prior art> Conventionally used air purifying filters installed at the front of air conditioners generally consist of a combination of frames disposed at the front and back, and an electrostatic filter and a deodorizing filter interposed therein. It becomes. In this case, the thickness of the deodorizing filter is reduced to reduce pressure loss.

<Problem to be solved by the invention> That is, in order to reduce the pressure loss of this deodorizing filter, measures such as reducing the weight or thickness of this filter are taken, but the air cleaning performance (dust collection ability) This will significantly reduce the deodorizing ability.

In view of the above circumstances, the present invention aims to provide an air filter that solves the above problems by providing holes in a deodorizing filter to ensure performance and reduce pressure loss.

Means for Solving the Problems According to the present invention, the ventilation resistance of the deodorizing filter on the windward side is made uneven, so that it is easier to see the dust adhering to the electrostatic filter installed in front of the deodorizing filter.

Due to the above configuration, under the condition that the pressure drop reduction value of the filter is the same, making holes will increase the volume of the filter rather than reducing the thickness of the filter. Accordingly, deodorizing ability can be ensured. This is especially true for deodorizing filters that use activated carbon, which deodorizes by capturing odor particles into the activated carbon, so this is proportional to the total amount of air passing through them.

<Example> The present invention will be described below based on the drawings of the example.

Reference numeral 1 denotes a filter part A disposed at the front position of the heat exchanger 3 of the air conditioner 2, and the filter part 1 has an electrostatic filter 6 between the filter frames 4 and 5 disposed in the front and rear. A deodorizing filter 7 filled with activated carbon is interposed in a sandwich-like manner to form an integral structure. In this case, the deodorizing filter 7 is provided with a plurality of holes 8, and the entire filter has a low pressure loss structure 1'.

Next, to explain this effect, when the air conditioner 2 is operated and the fan 9 is driven, the indoor air a passes from the suction port 10a of the front panel 10, through the pre-filter 11, and through the filter member. A predetermined heat exchange is performed by the heat exchanger 3 located at the back, and the cold air or hot air is primarily discharged into the room from the air outlet 12 via the fan 9.

Here, the deodorizing filter 7 is not made thinner, but by providing holes 8 in a part of the deodorizing filter 7. Initially, a lot of air a' passes through the part of the deodorizing filter 7 where the holes 8 are open, but the upstream electrostatic The filter 6 will have a lot of dust attached to the hole 8 area (the broken line area in Figure 2), and the pressure loss will gradually increase with the area without holes (pressure loss as a filter member).
become equal.

However, while a large amount of air had previously passed near the holes 8, it now flows uniformly throughout the filter.

・In other words, this temporal change extends the lifespan of deodorizing performance, making it possible to extend the replacement period.

Furthermore, by consciously making the shape of the hole 8 easy to understand as shown in FIG. 2, the corresponding shape A will stand out due to the dust since it is also a location with low pressure loss.

At this point, it is also possible to simply indicate the lifespan.

<Effects of the Invention> As described above, the present invention provides an air filter that combines a deodorizing filter and an electrostatic filter, and by making appropriate holes in the deodorizing filter, the filter can be easily removed without reducing the thickness of the deodorizing filter itself. Performance can be ensured and filter pressure loss can be reduced. Moreover, in this case, as more dust adheres to the surface of the electrostatic filter, a predetermined shape stands out due to the relationship with the area with low pressure drop, which also signals the time to replace it. This method has the effect of being more reliable and cheaper than the filter structure of the Noj method, which uses a sticker with a , or a filter frame in a specified color, and then compares it with those colors to notify when it is time to replace it. .

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 shows a filter t
FIG. 2 is an explanatory diagram showing the passage of air through the electrostatic filter and deodorizing filter, and FIG. 3 is a sectional view of an air conditioner equipped with a filter member. 1... Filter member, 2... Air conditioner, 4゜5
...Filter frame, 6...Electrostatic filter 7.
...Deodorizing filter patent applicant: Sanyo Electric Co., Ltd. Agent
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Claims (1)

[Claims] 1. An air filter comprising an electrostatic filter on the windward side and a deodorizing filter on the leeward side, characterized in that the deodorizing filter has uneven ventilation resistance.