JPS6280125A - Air cleaning duct - Google Patents

Abstract

PURPOSE:To eliminate the need for replacing a filter layer and obtain a favorable air cleaning effect for a long time by providing a heater for regenerating activated carbon in a duct in which a filter layer made of said activated carbon is provided. CONSTITUTION:In the captioned device which sucks in air in a car room or open air, cleans the sucked air, and blows out the air again into the car room via a duct, a filter member 4 is provided midway in the duct. This filter member 4 has two cylindrical parts 10, 14 which are connected in alignment to each other with a short-pipe type joining member 16, and a filter layer 1 consisting of activated carbon and asbestos is filled in a space between wire meshes 12, 13 provided on both ends on the inner face side of each of the cylindrical parts 10, 14. An annular heater supporting member 17 made of electrical non-conductor is provided in the middle part of the filter layer 1, and a heater 3 is meanderingly stretched on the member 17. This heater 3 is electrified only during the set time of a timer T after an ignition switch S is turned off.

Description

DETAILED DESCRIPTION OF THE INVENTION Purpose of the Invention (Field of Industrial Application) The present invention provides an air purifying duct 1 used for mainly introducing odor-eliminated air into an automobile interior through a duct.
-It is related to the structure of.

(Prior Art) Traditionally, in various fields, outdoor air is passed through ducts to ventilate indoor rooms or adjust temperature.
Alternatively, indoor air is often supplied into the room through a duct in a circular manner. For example, in order to adjust the humidity in the interior of an automobile, a method has been adopted in which temperature-controlled air is supplied into the interior of the vehicle from an opening provided in the instrument panel in front of the driver's seat.

Therefore, if this method requires introducing outdoor air that is somewhat contaminated, or if indoor air with odors caused by air conditioners etc. is to be circulated and supplied back into the room, the duct An activated carbon filter layer is installed in the middle of the system to supply purified air into the room.

(Problem to be solved by the invention) Although this method is quite effective in introducing clean air indoors, the suction power of activated carbon decreases with use, and its lifespan is usually about It is short, about 3 months.

Therefore, when the adsorption capacity of activated carbon decreases, the activated carbon must be replaced. However, it is quite difficult to replace the activated carbon filter layer provided in the middle of the duct 1, and as the frequency of replacement increases, the replacement work becomes troublesome.

An object of the present invention is to provide an air cleaning duct that does not require replacement of the activated carbon filter layer.

Structure of the Invention (Means for Solving the Problems) In order to achieve the above object, the present invention provides a method for regenerating activated carbon into a duct provided with a filter layer made of or containing activated carbon. The solution was to install a heater.

(Operation) The activated carbon is heated by a heater, and the adsorbed substance is first decomposed and evaporated. Next, the activated carbon itself is activated by the heat of the heater.

(Example) Next, an example in which the present invention is embodied in an air purifying duct provided in an automobile will be described based on FIGS. 1 to 3.

As shown in Fig. 1, one instrument panel is installed in front of the front seat 18 in the vehicle interior R, and the engine room E in front of the instrument panel draws air from the vehicle interior R or outside air. A duct 2 is provided for cleaning, circulating and supplying air to the interior R of the vehicle.

One end of the duct 2 is connected to an opening (not shown) provided in the vehicle interior R, and the other end communicates with openings 6 at both left and right ends of the instrument panel 19, and an open lower opening 8 at the center of the instrument panel 19. has been done.

In the middle of the duct 2, a blower (not shown) for forcibly circulating air and a filter member 4 containing a filter layer made of activated carbon and asbestos for cleaning the air, which will be described later, are provided. The filter member 4 has two
It has a built-in book heater. 2, the filter member 4 is attached to two cylindrical portions 10.14 whose surfaces abut against each other, and to each other side of the cylindrical portion 10.14. A medium-wide disc-shaped tube plate 22.
23, a short tubular connecting portion 11 whose end face is welded and fixed to the tube sheet 22, and a connecting portion 23 which is similarly welded and fixed to the tube sheet 23.

The two cylindrical parts 10.14 are connected via a short tubular joint member 16 fixed to the outer peripheral surface of the cylindrical part 14.

11θ A metal wire mesh 1 is attached to both ends of the inner surface of the cylindrical portion 10.
2.13 are provided, and a filter layer 1 made of a mixture of asbestos 21 and activated carbon C is inserted into a space sandwiched between the inner surface of the cylindrical body 10 and these wire meshes 12.13.

An annular heater support member 17 made of an electrically nonconductive material is inserted into the middle of the filter layer 1. Then, as shown in FIG. 3, the heater support member 17
A heater 3 is attached to the cylindrical portion 10 so as to meander and cross the cylindrical portion 10.

A circuit incorporating the car's battery B1 ignition switch S, main switch M, and timer bottom is connected to the two terminals 5 of the heater 3, and the ignition switch S is turned OFF before driving or other passengers. The timer T is set so that the main switch M is turned on after a certain period of time has elapsed until the person leaves the city, and the heater 3 is energized from the battery B for a further specified period of time. .

Metallic gold m12.
13 is provided to form a chamber into which the activated carbon C adhering to the asbestos 21 can enter, and a heater support member 17 is inserted into the center of the same inner surface along the inner surface. The heater 3 is mounted on the heater support member 17.

The heater 3 of the cylindrical portion 14 is also connected to the circuit of the cylindrical portion 10, and the heater 3 is supplied from the battery B until a predetermined period of time elapses after the main switch M is turned on. It is designed to be energized.

When assembling the filter member 4 having the above structure into the duct 2, first, the wire mesh 12 is inserted into the cylindrical part 10, then the asbestos 21 coated with activated carbon C is inserted, and then the heater 3 is assembled. Then, the asbestos 21 coated with activated carbon C is inserted into the cylindrical part 10 again, and then the wire mesh 13 is inserted and fixed.

Similarly to the above, the cylindrical part 14 is equipped with a wire mesh 12, asbestos 21 with activated carbon C attached, a heater 3, and asbestos 21 with activated carbon C attached.
, and insert the wire mesh 13 in this order. Then, the cylindrical portion 10 and the joint portion 816 of the cylindrical portion 14 are screwed together.

In this way, the filter element 4, into which the filter layer 1 is inserted, is connected midway through the duct 1 to the duct 2 via its connection 11.15.

Next, the functions and effects of this embodiment will be described.

When the adsorption capacity of the activated carbon C of the filter member 4 has decreased, after 5 minutes have elapsed since the ignition switch S was turned OFF and the main switch M was turned ON, the heater 3 was set to generate heat for only 10 to 20 minutes. ! ·do. Then, a current flows through the heater 3, the heater 3 generates heat to about 100° C., and this temperature is maintained for the above-mentioned time.

The activated carbon C of the filter member 4 is heated by the heat generated by the heater 3, and the adsorbed substances that have been absorbed by the activated carbon C are decomposed and evaporated, and the white matter of the talking carbon C is activated.

Therefore, active rAC with high adsorption capacity is present in the filter layer 1 within the filter member 4 of the duct 2.

If the air in the car interior R has a smell caused by the near conditioner, if that air is circulated through the duct 1-2 to the car interior R, the odor will pass through the duct 2 along with the air. Next, the activated carbon C in the filter member 4 adsorbs the clean air to the instrument panel 1.
It becomes possible to supply air to the vehicle interior R through the openings 6.7.8.9 of 9, thereby making it possible to fill the vehicle interior R with comfortable air.

In addition, there is no need to replace activated carbon C as in the past.
Moreover, even if it is necessary to replace it, the replacement interval becomes longer, and as a result, the cost required for controlling the temperature inside the vehicle interior R can be reduced.

The present invention is not limited to the configurations of the embodiments described above, but can also be implemented in the following manner, for example.

(1) As shown in Figure 4, gold W! Activated carbon C or activated carbon C and asbestos 21 are inserted into the case 20 having U12.13, and the case 20 is inserted into the cylindrical portion 10.14 or the like.

(2) Instead of the wire mesh 12 and 13, a heat-resistant filter material such as a perforated plate made of metal or heat-resistant resin or a sintered metal shade can be used.

Also, instead of asbestos 21, a heat-resistant activated carbon retaining material, such as rayon mI, may be used.

(3) With the wire meshes 12 and 13 of the above embodiment removed,
Use filter member 4.

(4) The heater 3 can be arranged in various ways that can heat the activated carbon C and not impede air circulation. For example, as shown in FIG. 5, the heater 3 may be arranged along the inner circumferential surface of the cylindrical portion 1°O.

(5) When using activated carbon with a large particle size, use activated carbon alone without using asbestos or the like together. In this case, as shown in FIG. 6, activated carbon (not shown) is sandwiched between two perforated plates 12a and 13a in a relatively thin layer, and the heater 3 is provided around the perforated plates 12a and 13a. As shown in FIG. 9, the heater 3 is connected to two perforated plates 12a,
It can be placed between the holes 13a along with activated carbon (not shown).

Further, as shown in FIG. 7, activated carbon (not shown) can be placed in a thin porous case 20 and arranged in the cylindrical heater support member 17 alternately with the heater 3.

(6) Attaching the heater 3 to the duct 1 whose filter layer 1 is made of activated carbon C in fields other than automobiles.

(7) Use electrical energy charged from a solar cell as electrical energy for the heater 3.

(8) Turn on the ignition switch S so that the heater 3 is energized.

Effect of the invention The present invention exhibits the following excellent effects.

The adsorbed substance adsorbed on the activated carbon is decomposed by the heat generated by the heater, and the adsorption capacity of the activated carbon can be maintained at a high level. At the same time, the activated carbon itself is regenerated, making it possible to supply clean air into the room through the duct, making it possible to fill the room with comfortable air.

In addition, add activated carbon as usual! There is no longer a need for replacement, and even if replacement is required, the replacement interval can be extended, and the cost required for indoor ventilation or temperature control can be reduced.

These effects are particularly noticeable when indoor air is circulated and reused in automobiles.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a partially longitudinal side view of a filter member of the same embodiment, and FIG. 3 is a cross-sectional view taken along Fig. 4 is a partial longitudinal sectional side view showing a different aspect of the filter member, Fig. 5 is a transverse sectional view showing another arrangement of the heater, and Fig. 6 is a partial longitudinal sectional view showing another aspect of the filter member. FIG. 7 is a conceptual diagram showing another embodiment, and FIG. 8 is a perspective view showing another embodiment. 1...filter layer, 2...to duct 1, 3...heater, C
...Activated carbon, S...Ignition switch

Claims (3)

[Claims] 1. It is characterized in that a duct (2) provided with a filter layer (1) made of or containing activated carbon (C) is provided with a heater (3) for regenerating the activated carbon (C). Air cleaning duct. 2. The air purifying duct according to claim 1, wherein the duct (2) is a duct for circulating air inside the vehicle, and the heater (3) is powered by a battery (B) installed in the vehicle. . 3. The heater (2) is turned on when the ignition switch (S) is O.
The air purifying duct according to claim 2, wherein the air cleaning duct is connected to a timer (T) so as to be energized for a predetermined time after a predetermined time has elapsed after being turned FF.