JPS591678Y2 - Futon dryer with air purification device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a futon dryer with an air purification device that can also be used for indoor air purification.

In recent years, air pollution due to dust and harmful gases such as NO2 and CO generated from driving cars and the combustion of large boilers has become significant, and as polluted outdoor air enters indoors, indoor air quality in urban residences etc. depends on the environment. This has led to the need for additional purification equipment.

Conventional air purification devices have generally been air purifiers with dust collectors or devices in which a near conditioner is equipped with a pre-filter or activated carbon filter for dust collection.

Since these devices are expensive, large, and expensive to install, there is a desire for a simple indoor air purification device that is inexpensive, small, and portable.

This invention aims to create a futon dryer with an air purifying device that can also be used as an indoor air purifying device by making simple improvements to an electric futon dryer that is rarely used for anything other than drying futons and clothes. be.

The futon dryer with an air purifying device of the present invention has an activated carbon layer, a layer of a mixture of potassium carbonate, calcium hydroxide, calcined gypsum, and powdered activated carbon in the air flow path downstream from the heater of the electric futon dryer. It is characterized by a removable air purifying filter made from a catalyst layer in which platinum and palladium are simultaneously supported on a mixture of potassium, alumina cement, and powdered activated carbon. It can also be used for air purification, and as an air purification device, it can remove NO2 and CO from the air with high efficiency, and even if the catalyst is poisoned, it can be easily regenerated.

Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 1, 1 is an electric futon dryer, 2 is an air flow path leading from the air intake port 3 to the air outlet 4, 5 is a fan installed at the air intake port 3, and 6 is installed downstream of the fan 5. The fan 5, which is a heater, is driven by the first stage of a switch (not shown), and the heater 6 is energized by the second stage.

The air flow path 2 between the heater 6 and the air outlet 4 is formed in a bulging large diameter portion 2a.

Reference numeral 7 denotes an air purifying filter provided in the large diameter portion 2a perpendicular to the air flow direction,
It can be attached and detached via an insertion opening 8 with a lid provided on the top surface of the .

The air purifying filter 7 can also be provided upstream of the fan 5 by forming a large diameter portion 2a between the air suction port 3 of the air flow path 2 and the fan 5. Alternatively, as shown in FIG. It may also be provided at the tip of the hose 9 attached to the air outlet 4.

This air purification filter 7 includes, from the upstream side, an activated carbon filter 7a, a NO2 remover filter 7b,
The CO acid oxidation catalyst filter consists of three layers of filters in order of strength.

The NO2 remover filter 7b consists of a layer of a kneaded mixture of potassium carbonate, calcium hydroxide, calcined gypsum, and powdered activated carbon.

Powdered activated carbon plays the role of increasing the surface area of the kneaded molded product and accelerating the reaction between alkali and NO2.

The kneaded material layer and NO2 react as follows to release NO in the air.
Remove 2.

Note that the kneaded material layer does not react with No.

In this example, the kneaded material layer was prepared by mixing potassium carbonate, calcium hydroxide, calcined gypsum (CaSO4.+H20), and powdered activated carbon in a weight ratio of 3:3:2:2, kneading it with water, and then drying it. there was.

Next, the COO conversion catalyst filter 70 is a catalyst layer in which platinum and palladium are simultaneously supported on a mixture of potassium carbonate, alumina cement, and powdered activated carbon. Potassium carbonate is passed through all 100 meshes, and powdered activated carbon is passed through all 300 meshes. The alumina cement used had a particle size of 45% or more alumina and 10% or less ferric oxide.

The carrier was formed by molding sodium carboxymethylcellulose as a binder to potassium carbonate 10, powdered activated carbon 30, lime aluminate 60 in weight ratio.

After thoroughly drying the mixed wire material, it was classified into 8 to 20 meshes and used as a carrier.

After thoroughly drying the carrier, it was immersed in a solution containing palladium and platinum to effect adsorption.

Palladium and platinum have different Q. The amount was adjusted so that 3 wt% was adsorbed.

The carrier thus adsorbed was reduced with sodium borohydride and then dried to form a catalyst layer.

The activated carbon filter 7a configured as above, the NO2 remover filter 7b, the CO acid oxidation catalyst filter top opening, the height of each filter layer 5 mm, and the filter area 1
Using a futon dryer with an air purifying device, in which a 5 x 15 cm air purifying filter 7 was attached to an electric futon dryer 1 with an air flow rate of 4 m3 per minute,
The results of an air purification test in a closed room with tatami ventilation 1 to 2 times per hour are shown in Figure 3 for NO2.
Regarding O, it is shown in FIG.

In the figure, the solid line I indicates the case where the futon dryer with air purifying device was used, and the dotted line II indicates the case where it was not used.

Note that NO2 was analyzed using a chemiluminescence analyzer, and CO was analyzed using a non-dispersive infrared analyzer.

It can be seen that when the futon dryer with an air purifying device according to the present invention is used, the NO and CO concentrations in the room are significantly reduced compared to when they are not used.

Although the activated carbon filter 7a has a relatively short lifespan, it can adsorb a wide variety of gases, and the NO2 remover filter 7b stably removes NO2 without being affected by other gases and removes CO2.
The acid oxidation catalyst filter is not easily poisoned, and even if it is poisoned, it can be regenerated immediately by heating with a heater, etc., and can be used repeatedly.

When using this futon dryer with air purification device for drying, remove the air purification filter 7 and use it, and when using it for air purification, attach the air purification filter 7 and use the fan without energizing the heater 6. Only 5 is driven and used.

The futon dryer with an air purifying device of the present invention can be implemented as described above, and the futon dryer can be operated with a simple configuration in which an air purifying filter is removably installed in the air flow path of an electric futon dryer. It can also be used for indoor air purification as a portable and simple air purification device.

In addition, the kneaded material layer and catalyst layer that make up the air purification filter can remove NO2 and CO from the air with high performance, and by providing the air purification filter downstream from the heater, the catalyst can be If poisoned, it can be regenerated immediately by energizing the heater and heating it with warm air.
The effect can be demonstrated.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a side sectional view of another embodiment, and FIGS. 3 and 4 are graphs showing the results of usage tests. 1... Electric futon dryer, 2... Air flow path, 2a... Large diameter section, 5... Fan, 6... Heater, 7...Air purification filter, 7a...Activated carbon filter (activated carbon layer), 7b...NO2 remover filter (potassium carbonate, calcium hydroxide, calcined gypsum and powder) (admixture layer of activated carbon), 7C...CO oxidation catalyst filter (catalyst layer in which platinum and palladium are simultaneously supported on a mixture of potassium carbonate, alumina cement, and powdered activated carbon), 8...
...Insertion port.

Claims (1)

[Scope of utility model registration request] In the air flow path after the heater of an electric futon dryer, there is an activated carbon layer, a layer of a mixture of potassium carbonate, calcium hydroxide, calcined gypsum, and powdered activated carbon, and a mixed layer of potassium carbonate, alumina cement, and powdered activated carbon, and platinum. A futon dryer with an air purifying device, characterized in that an air purifying filter consisting of a catalyst layer and a catalyst layer that simultaneously supports palladium is installed in a removable manner.