JPH04349922A - Deodorizing body and preparation thereof - Google Patents

Abstract

PURPOSE:To reduce the usage of a catalyst and, in its turn, to effectively use the catalyst without lowering the function of a catalyst layer in a deodorizing body wherein the catalyst layer is provided to the surface of an adsorbent solid. CONSTITUTION:A deodorizing body 27 is constituted by providing a catalyst layer 31 composed of a noble metal such as platinum to an adsorbent solid 30 prepared by solidifying an adsorbent. No catalyst layer 31 is formed to the upper surface 30a coming into contact with a heat insulating material 29 but almost not coming into contact with air of the adsorbent solid 30. Therefore, the catalyst layer 31 contributes to deodorizing in all of parts and there is no wasteful part.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing body comprising a catalyst layer provided on the surface of a solid adsorbent and a method for producing the same.

0003

2. Description of the Related Art In recent years, deodorizing devices for refrigerators using a deodorizing body consisting of an adsorbent and a catalyst have been developed and used. This deodorizing device is disposed in a cooler room that forms part of a circulation path through which internal air circulates, and is specifically configured as shown in FIG. 5.

That is, a deodorizing body 3 is held by a support piece 4 on the lower surface of a cover 2 of a defrosting heater 1 installed below a cooler (not shown), and a deodorizing body 3 is held between the cover 2 and the deodorizing body 3. has a structure in which a heat insulating material 5 is interposed.

[0005]The deodorizing body 3 has a structure in which a catalyst layer 3b made of a noble metal such as platinum is attached to the surface of an adsorbent solid 3a made by solidifying an adsorbent such as silica. Odor components contained in the air are adsorbed and removed by the adsorbent solid 3a, and when the cooler is defrosted, the odor components are desorbed from the adsorbent solid 3a by being heated by the defrosting heater 1. It has a function of oxidizing and decomposing the desorbed odor components in the catalyst layer 3b.

[0006]

[Problems to be Solved by the Invention] In the deodorizing body 3 having the above structure, the catalyst layer 3b is attached to the entire surface of the solid adsorbent 3a. The upper surface that contacts the heat insulating material 5 hardly contacts the air, and the catalyst layer 3b in that portion hardly contributes to the deodorizing function. For this reason, there was a problem in that catalysts such as precious metals, which are valuable resources, were not effectively utilized.

[0007] Therefore, an object of the present invention is to reduce the amount of catalyst used without reducing the function of the catalyst layer in a product in which a catalyst layer is provided on the surface of a solid adsorbent. It is an object of the present invention to provide a deodorizing body that can be effectively used and a method for producing the same.

[Configuration of the invention]

[0009]

[Means for Solving the Problems] The deodorizing body of the present invention has a catalyst layer that oxidizes and decomposes odor components when heated, on the surface of an adsorbent solid material made by solidifying an adsorbent that adsorbs odor components. The feature is that the catalyst layer is provided on all but one surface of the solid adsorbent.

In order to produce such a deodorizing body, two adsorbent solids are stacked one on top of the other, a catalyst layer is formed on the surface of both adsorbent solids, and then both adsorbent solids are separated. good.

[0011]

[Operation] According to the deodorizing body described above, there is a surface on the surface of the solid adsorbent on which no catalyst layer is formed, and this surface is treated as the surface of the deodorizing body that has almost no chance of contacting with air. By doing so, there is no part of the catalyst layer that is not effectively utilized. Thereby, the catalyst layer provided on the surface of the adsorbent solid material can be used effectively without wasting it.

Furthermore, according to the above-described manufacturing method, it is possible to prevent a catalyst layer from being formed on the surface where two adsorbent solids are superimposed. Therefore, the surface on which the catalyst layer is not formed can be easily formed without special masking.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. First, Figure 4 shows the top of the refrigerator.
In the refrigerator main body 11, a freezer compartment 12 and a refrigerating compartment 13 are formed, and doors 14 and 15 are provided on the front side, respectively. A cooler 17 is disposed in a cooler chamber 16 formed at the back of the freezer compartment 12, and a fan 18 for circulating air inside the refrigerator is disposed above the cooler 17.

When the fan 18 is driven, the cooler 1
A part of the air cooled by 7 is supplied into the freezer compartment 12 from the supply port 19, and the air in the freezer compartment 12 is circulated in such a way that it is returned to the cooler compartment 16 through the return duct 20, As a result, the inside of the freezer compartment 12 is cooled. Further, a part of the air cooled by the cooler 17 is supplied into the refrigerator compartment 13 through the supply duct 21, and the air inside the refrigerator compartment 13 is returned into the cooler compartment 16 through the return duct 22. As a result, the inside of the refrigerator compartment 13 is cooled.

In this case, the cooler chamber 16 and the freezer chamber 1
2 and the return duct 20 constitute a circulation path in which the air in the freezer compartment 12 circulates, and the cooler chamber 16, the supply duct 21, the refrigerator compartment 13, and the return duct 22 constitute a circulation path in which the air in the refrigerator compartment 13 circulates. The road is constructed.

A deodorizing device 23 is provided in the lower part of the cooler chamber 16 in the circulation path, and the deodorizing device 23 will be described below with reference to FIGS. 1 to 3.

A heater 24 made of, for example, a glass tube heater is provided below the cooler 17 and also serves as a defrosting heater. This heater 24 is arranged to extend in the left-right direction within the cooler chamber 16, and is controlled to be energized so that it is energized when the cooler 17 is defrosted, and is turned off at other times.

The heater 24 is provided with a cover 25 that covers the heater 24 from above and is spaced from it at a predetermined distance. This cover 25 is formed of a metal plate such as aluminum into a shallow container shape with an open bottom, and has a plurality of pairs of support pieces 26 on the bottom surface.
is fixed. A deodorizing body 27, which will be described later, is held below the cover 25 by a support piece 26 via a wire mesh 28. A heat insulating material 29 such as glass fiber is interposed between the deodorizing body 27 and the cover 25. Note that a plurality of deodorizing bodies 27 are arranged along the longitudinal direction of the heater 24.

The deodorizing body 27 has a catalyst layer 31 made of a noble metal such as platinum or palladium on the surface of a solid adsorbent 30 having a rectangular cross section and made by solidifying activated carbon or silica adsorbent. The configuration is as follows. In this case, the catalyst layer 31 is not provided on the upper surface 30 a of the surface of the adsorbent solid 30 that contacts the heat insulating material 29 .
It is provided except for 0a.

[0020] Such a deodorizing body 27 was manufactured as follows. That is, as shown in FIG. 3, a catalyst layer 31 is formed on the surfaces of both adsorbent solids 30 by stacking two adsorbent solids 30 and immersing them in a catalyst solution. And these two adsorbent solids 3
0,30 is removed from the solution and dried, after which both adsorbent solids 30,30 are separated. At this time, 2
The catalyst layer 31 is not formed on the surface where the adsorbent solids 30, 30 are superimposed on each other, and in this way, one of the surfaces of the adsorbent solids 30 (the upper surface 30
A deodorizing body 27 having a structure in which a catalyst layer 31 is provided except for a) is formed.

Now, in the above configuration, during cooling operation of the refrigerator, the air inside the refrigerator (inside the freezer compartment 12 and the refrigerator compartment 13) is circulated through the circulation path by the blowing action of the fan 18. In this process, the air passing through the cooler chamber 16 comes into contact with each deodorizing body 27, and the odor components contained in the air are adsorbed by the adsorbent constituting the adsorbent solid 30 in the deodorizing body 27 and removed. Ru.

On the other hand, when the cumulative operating time of the compressor (not shown) reaches a predetermined value, the compressor and fan 1
8 is de-energized, while the heater 24 is energized and the cooler 1
7 defrosting operation is started. The heat generated by the heater 24 heats the cooler 17 to defrost it, and at the same time, each deodorizing body 27 is heated.

Since the deodorizing body 27 is heated by the radiant heat of the heater 24 and also by the heat conduction of the wire mesh 28, it is heated as uniformly as possible. When the deodorizing body 27 is heated to a temperature higher than a predetermined temperature, the odor components adsorbed by the adsorbent are desorbed, and at the same time, the odor components are oxidized and decomposed in the catalyst layer 31 and removed. The deodorizing body 27 is heated in this manner and desorbs odor components, thereby regenerating its adsorption function, that is, its deodorizing function.

At this time, since the deodorizing body 27 and the heater 24 are covered from above by the cover 25, water dripping from the cooler 17 during defrosting is prevented from directly hitting them. Further, since the heat insulating material 29 is interposed between the cover 25 and the deodorizing body 27, the heat shock of the deodorizing body 27 due to rapid cooling when defrosting water is dripped onto the cover 25 can be reduced.

When the temperature of the cooler 17 reaches a predetermined defrosting end temperature, the heater 24 is cut off and the defrosting operation is terminated.After this, the compressor and the fan 18 are energized and the cooling operation is resumed. will be started. Along with this, the temperature of the deodorizing body 27 also decreases, and the deodorizing body 27 comes to adsorb odor components again in the same manner as described above.

According to this embodiment, the deodorizing body 27
Since the catalyst layer 31 is not formed on the upper surface 30a of the adsorbent solid material 30 that contacts the heat insulating material 29, there is no wasted portion of the catalyst layer 31, and all of it contributes to deodorization. . Therefore, the amount of catalyst used can be reduced compared to the conventional method without deteriorating the function of the catalyst layer 31, and the catalyst, which is a valuable resource, can be used effectively.

Moreover, in this case, two adsorbent solids 30
A catalyst layer 31 is formed on the surfaces of both adsorbent solids 30 in a state where they are overlapped, and then both adsorbent solids 30 are separated. 30a), the catalyst layer 31 can be formed without any special masking.
It is possible to easily form a surface on which no 1 is formed.

[0028]

According to the deodorizing body according to claim 1, a surface on which a catalyst layer is not formed is formed on one surface of the solid adsorbent, and this surface is made into a surface that has almost no opportunity to come into contact with air. By adapting, the amount of catalyst used can be reduced without reducing the function of the catalyst layer, and the catalyst, which is a valuable resource, can be used effectively.

According to the method for producing a deodorizing body according to claim 2, a catalyst layer is formed on the surface of both adsorbent solids in a state in which two adsorbent solids are overlapped, and then both adsorbent solids are overlapped. Since we have prevented the formation of a catalyst layer on one side of the surface of the solid adsorbent by separating the objects, we can easily form the surface on which no catalyst layer is formed without special masking. be able to.

[Brief explanation of the drawing]

[Fig. 1] A vertical cross-sectional side view of a deodorizing device showing one embodiment of the present invention.

[Figure 2] Longitudinal side view of a single deodorizer

[Figure 3] Vertical side view for explaining the manufacturing method

[Figure 4]
Vertical side view of the upper part of the refrigerator

[Figure 5] A diagram equivalent to Figure 1 showing a conventional example

[Explanation of symbols]

23 is a deodorizing device, 24 is a heater, 25 is a cover, 27 is a deodorizing body, 29 is a heat insulator, 30 is an adsorbent solid, and 31 is a catalyst layer.

Claims (2)

[Claims] 1. A deodorizing body comprising a catalyst layer that oxidizes and decomposes odor components by being heated on the surface of an adsorbent solid material made by solidifying an adsorbent that adsorbs odor components, wherein the catalyst layer is A deodorizing body, characterized in that it is provided on all but one surface of the solid adsorbent. 2. A method for producing a deodorizing body, which comprises providing a catalyst layer that oxidizes and decomposes odorous components by heating on the surface of an adsorbent solid made by solidifying an adsorbent that adsorbs odorous components, A method for producing a deodorizing body, characterized in that a catalyst layer is formed on the surface of the two adsorbent solids in a state in which the two adsorbent solids are overlapped, and then both the adsorbent solids are separated. .