JPH0437725B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an air purifying filter that allows air contaminated with cigarette smoke, suspended dust, etc. to pass through and removes fine dust and odors.

[Background of the invention]

It is generally known that the performance of an air purifier is better as the wind speed passing through the filter is lower, the filter fiber diameter is smaller and the basis weight is larger, and in the case of activated carbon filters, the particle size is smaller and the amount used is larger. In relation to blowers, in order to obtain two types of air purifiers with almost constant passing air velocity and large and small circulating air volumes, the area of the filter should be increased for those with a large air volume and the area for a small one. This leads to a design that is smaller by the difference. Of course,
Using a large filter for something with a small air volume is conceivable from a performance perspective, but it is uneconomical because filters are consumable items with a limited lifespan. However, it is undesirable to supply two types of filters with different dimensions for two types of air purifier bodies because it increases the complexity of procurement for both the supplier and the purchaser.

Another problem with air purifying filters is that removing fine dust alone is not enough for the cleaning effect, so a deodorizing filter is combined as a subsequent filter to the dust collecting filter, but in this case, maintenance must be performed on both separately. However, it has the disadvantage that it is troublesome for the user.

[Purpose of the invention]

In view of the above drawbacks, the present invention has the object of making it possible to use one type of filter for two types of air cleaner bodies with different air volumes.

[Embodiments of the invention]

One embodiment of the present invention will be described with reference to FIGS. 1 to 5. 1 is an air purifying filter which is the essential part of the present invention. Reference numeral 2 represents an air purifier body that circulates indoor air, 3 represents an air outlet, and 4 represents a front cover having an air inlet 5. Air circulation vanes 6 and an electric motor 7 are incorporated into the main body 2. Air purifying filter 1
are held in a dimensional relationship that faces the suction port 8 of the blade and has a space 9 on the rear surface. The peripheral edge of the air purifying filter 1 has a structure in which the main body 2 is closed with a front cover 4. Replacement can be easily done by disassembling the front cover 4 from the main body 2. The time to replace the filter can be determined by looking at the window 9 provided in the front cover 4 and checking the color change of the filter.

As shown in Fig. 2, the air purifying filter 1 has a boundary mark 1a such as a heat seal line on the center line dividing the target shape into two parts with respect to the external dimensions L ₁ and L ₂ .
has been established. As a result, the air purifier main body 2 shown in Fig. 1 uses a two-piece filter with external dimensions L ₁ and L ₂ , but a smaller air purifier main body (not shown) uses an air purifier. It can be cut along the boundary mark 1a of the filter 1 and used as an air purifying filter with a small outer size of 1/2 L ₁ or L ₂ . The heat sheet line etc. may be in the shape of a dotted line corresponding to a perforation. As shown in the cross-sectional view of FIG. 3, the front and rear surfaces of the deodorizing filter 12 made of activated carbon fiber layer are sandwiched between two dust collection filters 10 and 11 made of electret fiber layer, and the outer dimensions of the former are increased by the ears. In addition, the deodorizing filter 12 is formed into a pair with the center cut off, and the peripheral edge 1b
The air purifying filter 1 can be constructed by forming a central boundary surface 1c and binding this portion into a bag shape using a heat sheet method or the like. This eliminates the trouble of replacing the dust collection filter and deodorizing filter separately, and only needs to be handled once. In this case, if the activated carbon filter 12 is cut, it will spill out and stain the surrounding area black because it is a granular material, but in the case of the present invention, the central boundary surface 1
Since c is 10 parts of the dust collection filter, it can be easily cut. Moreover, unlike the fluffy fiber layer, the heat-sealed surface is thin and moderately hard, so it has the advantage of being easily cut with scissors or the like.

〔Effect of the invention〕

As described above, according to the present invention, by preparing one type of air purifying filter as a maintenance part, it can be applied to a plurality of air purifier bodies by dividing it into two pieces for a small size and using two pieces for a large size. You can get great features.

When the present invention is applied to a small size, it is possible to fold it into two pieces with the central boundary surface 1c as the center line without dividing it into two. In this case, the ventilation resistance and thickness of the filter are increased, but there is an advantage that the filter performance is greatly improved.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the air purifier, Fig. 2 is a front view of the air purifying filter which is the main part of the present invention, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is the front view. FIG. 5 is a partial perspective view of the cover, and FIG. 5 is a partial cross-sectional side view of the air cleaner. 1... Air purifying filter, 2... Air purifier body, 3... Air outlet, 4... Front cover, 5... Inlet, 6... Vane, 7... Electric motor, 8... Vane suction port , 9... window section, 10, 11... electret fiber layer filter, 12... activated carbon fiber layer filter.

Claims (1)

[Scope of Claims] 1. A structure in which the activated carbon filter is sandwiched from the front and back sides by two fiber layer filters whose outer dimensions are larger than the outer dimensions of the activated carbon filter by an ear, and the surrounding edges are bound into a bag shape by heat sealing or the like. An air purifying filter characterized in that a surface continuous to the peripheral edge is provided as a central boundary surface that divides the front dimension into two symmetrical shapes, and also serves as a boundary mark. 2. The air purifying filter according to claim 1, wherein a boundary mark such as a heat seal line is provided on a center line that divides the front dimension of the fiber layer filter into two symmetrical shapes.