JPH07265639A - Deodorizing filter - Google Patents

Abstract

PURPOSE:To efficiently conduct deodorization by providing a physisorptive first deodorant bed on the upstream side and an oxidation-catalyst second deodorant bed on the downstream side, arranging a heating element on the respective upper sides (upstream side), energizing the heating element of the second bed to be heated when in use and performing adsorption at a relatively low temp. and oxidative decomposition at a relatively high temp. and to desorb the malodor in the first bed by energizing both heating elements to regenerate the deodorants and to prolong the service life of the deodorant. CONSTITUTION:A heating element 9, a first deodorant bed 3 having a phsisorptive deodorant 5 (active carbon), a heating element 10 and a second deodorant bed 4 contg. an oxidation catalyst carrying metallic manganese 8 are successively arranged from the upstream side. The heating element 10 is energized to perform adsorption and oxidative decomposition respectively at an optimum temp., and the heating elements 9 and 10 are energized to desorb malodor from the bed 3, to decompose the malodor in the second deodorant bed and to regenerate the deodorant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor deodorizing filter used in homes, offices, vehicles such as automobiles and the like.

[0002]

2. Description of the Related Art Deodorizing materials for deodorizing filters include, for example, physically adsorbing materials such as activated carbon and zeolite, and catalytic systems (oxidation catalysts) that oxidize malodorous substances.
These are used alone or in combination to form a deodorizing filter. Physically-adsorptive ones have the property of reversing adsorption and desorption and have a long life. Catalytic ones are excellent in deodorizing speed by oxidatively decomposing malodorous substances. Therefore, they are often used together to improve the deodorizing ability and broaden the range of application.

[0003]

The performance of these deodorants changes depending on the temperature. That is, the adsorption action of the physically adsorptive substance is remarkable at low temperature and decreases at high temperature, and conversely desorption phenomenon occurs. Also, the catalyst system has a remarkable decomposition action at high temperature, but the performance deteriorates at low temperature. The conventional deodorizing filters that use these deodorizing materials together have no means for controlling the temperature, so that they cannot exhibit sufficient performance even when used together.

[0004]

According to the present invention, a first deodorizing layer having a physically adsorptive deodorizing material on the upstream side and a second deodorizing layer having a catalyst (oxidation catalyst) type deodorizing material on the downstream side are provided, each having an upper surface. It is a deodorizing filter with a stack of heating elements that can blink.

[0005]

The gas such as air containing a malodorous substance enters from the upstream side, the malodorous substance is adsorbed by the first deodorizing layer, and the remaining malodorous substance then oxidatively decomposes by touching the catalyst in the second deodorizing layer. In this case, the heating element of the first deodorizing layer is turned off to cause a remarkable adsorption action at a high temperature, and the heating element of the second deodorizing layer is turned on to warm the passing gas and the deodorizing material, so that the oxidizing action is performed. Makes it noticeable.

At the appropriate time, both the heating elements of the first and second deodorizing layers are turned on to remove the malodorous substances adsorbed by the deodorizing material of the first deodorizing layer, and oxidatively decompose the second deodorizing layer. The deodorizing material of the first deodorizing layer is regenerated by being decomposed by the action. In this case, since the deodorizing material of the second deodorizing layer is not consumed by reacting, it does not cause a remarkable shortening of life.

[0007]

EXAMPLE FIG. 1 shows an example. The deodorizing filter 1 is provided with a first deodorizing layer 3 on the upstream side in the frame 2 and a second deodorizing layer 4 on the downstream side. The first deodorizing layer 3 is formed by filling activated carbon particles 5 between the upper and lower nets 6, 6 to form a layer, and the second deodorizing layer 4 is formed by supporting a metal catalyst such as metal manganese 8 as a carrier on zeolite. is there. Heating elements 9 and 10 are provided on the upper surfaces of the first deodorizing layer 3 and the second deodorizing layer 4, respectively. The heating elements 9 and 10 are formed by arranging insulated electric resistance heating wires in a meandering shape.
Install. Further, a temperature controller (not shown) may be attached.

In addition to this, the first deodorizing layer 3 may be a sheet of activated carbon fiber, etc., and the metal catalyst of the second deodorizing layer 4 may be selected from magnesium or the like, and the carrier may be appropriately selected.

The heating element may be appropriately selected as long as it forms a heating layer through which air passes. The uppermost and lowermost surfaces of the deodorizing filter 1 are covered and protected by the heat-resistant non-woven fabrics 15 and 16 or the mesh body to maintain the shape.

The air containing the malodorous substance flows in as shown by arrow A, passes through the heating element 9 in the OFF state, and is adsorbed and deodorized by the first deodorizing layer 3. Since the activated carbon 5 is not warmed, it has a normal adsorption action. Next, this air is the heating element 1 in the ON state.
After passing 0, the malodorous substance is oxidized and decomposed in the warmed second deodorizing layer 4 to be deodorized. In this case, since the air and the second deodorizing layer 4 are warmed by the heating element 10, the deodorizing action is active.

At the appropriate time, the heating elements 9 and 10 are turned on together.
When N is used to generate heat when energized, the malodorous substance is desorbed from the first deodorizing layer 3 and is oxidatively decomposed by the second deodorizing layer 4. In this way, the activated carbon particles 5 of the first deodorizing layer 3 are regenerated.

[0012]

According to the present invention, the physically adsorbing deodorizing layer and the oxidation catalyst system deodorizing layer are superposed and the heating elements are arranged on the respective deodorizing layers. Therefore, the deodorizing action can be performed at each active temperature. The effect is great. Further, since the malodorous substance can be desorbed from the physically adsorbent deodorant, decomposed and regenerated, the life of the deodorant filter is extended.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment.

[Explanation of symbols]

 3 First deodorizing layer 4 Second deodorizing layer 9, 10 Heating element

Claims (1)

[Claims] 1. A first deodorizing layer having a physically adsorptive deodorizing material having a blinking heating element on the upper surface thereof is provided, and on the lower surface side thereof,
A deodorizing filter provided with a second deodorizing layer having a catalyst (oxidation catalyst) deodorizing material having a blinking heating element on the upper surface.