JPH0111239Y2 - - Google Patents

Description

[Detailed explanation of the idea]

INDUSTRIAL APPLICATION FIELD The present invention relates to a deodorizing structure for removing odors inside a storage compartment such as a refrigerator. BACKGROUND ART Conventionally, as a deodorizing device for removing odors from inside a refrigerator, a device in which activated carbon is housed in a box having ventilation holes has been widely used. Further, Japanese Utility Model Application Publication No. 51-49752 discloses a deodorizing device comprising a fan part and a cover part that covers the fan part and has a plurality of drug storage chambers made of mesh bodies separated and independent by partition walls. It is shown. Problems that the invention aims to solve However, although deodorizing tools containing activated carbon inside the box may reduce certain odors, they are not necessarily effective in deodorizing odors that are a combination of various odors. The deodorizing effect decreases over a relatively short period of time, and odor components that have been adsorbed are likely to be re-released.
It may even contaminate the atmosphere inside the refrigerator, and you may not know how much the deodorizing performance has deteriorated or when it should be replaced, and you may continue to use it even though it has lost its deodorizing function. There are many problems, such as problems with endpoints, and solving endpoint problems in particular has become an important issue. The deodorizing device described in Utility Model Application Publication No. 51-49752 is
The multiple chemical storage chambers in the netted cover section contain chemicals suitable for different purposes, such as deodorizers, deodorants, air purifiers, air fresheners, and insect repellents, to comprehensively eliminate indoor odors. However, since the device uses a fan to vaporize these chemicals into the room, the structure of the device is extremely complex, the price is high, and there are problems such as the need for a power source and conductive wires for use. There are problems with the refrigerator,
It cannot be practically applied to deodorize small spaces such as shoe cabinets. In addition, the above-mentioned endpoint problem, which has traditionally been the most problematic, remains unresolved. The object of the present invention is to provide a deodorizing structure that solves all of the above-mentioned problems and is also preferable in terms of design. Means for Solving the Problems The present invention consists of ``a porous granular material a adsorbed with a plant fraction from the Camellia family, which is housed in a tank body A having a large number of vents, and which contains a plant fraction from the Camellia family. The aqueous gel B, which decreases in volume over time, is housed in a transparent tank B that allows ventilation only in the upper part, and the sizes of both the tanks A and B are made approximately the same. A deodorizing structure for removing odors in a storage warehouse, characterized in that the structures are connected in a twin-like manner by connecting members 4.'' The present invention will be explained in detail below. What is the Camellia family plant distillate used in this invention?
This refers to the distillate mainly from the leaves of plants in the Camellia family, such as tea, sasanqua, camellia, Sakaki, and Motsukoku.When plants in the Camellia family are carbonized under reduced pressure, the distillate boils at 180 to 200℃ at 20 mmHg. It can be obtained by collecting the ingredients. This fraction contains flavanols,
It contains flavonols and various other organic compounds, and typically has the following characteristic values. 276 by UV spectrum in 1000x aqueous solution
Maximum absorption is shown at ±2 mμ. Refractive index: n ²⁰ _D = 1.418 ± 0.02 Optical rotation: α ²⁰ _D = 0.007° ± 0.002° Specific gravity: d ²⁰ ₂₀ = 1.025 ± 0.02 (However, the refractive index, optical rotation, and specific gravity are 20%
(W/W) Value measured in a propylene glycol solution) Such a fraction can be obtained by directly carbonizing a plant of the Camellia family under reduced pressure. Extracts from plants in the Camellia family have some effect, but distillates from plants in the Camellia family have a much better effect. This is thought to be because impurities are removed and the active ingredients are activated by carbonization. The porous granules that adsorb the Camellia family plant fractions mentioned above include inorganic and organic particles, crushed pieces,
Examples include molded products. Among these, unglazed particles obtained by molding unglazed powder into small spheres or pellets are particularly preferred because of their excellent deodorizing performance. The adsorption of Camellia plant fraction to these porous granules is as follows:
This is usually carried out by immersing the porous granules in a solution of the fraction dissolved in water or/and an organic solvent and then drying, or by spraying this solution onto the porous granules and then drying. Although the adsorption amount of the above fraction can be arbitrarily selected, it is often selected from the range of 0.01 to 30% by weight, particularly 0.1 to 10% by weight. The aqueous gel containing the Camellia family plant fraction can be obtained, for example, by adding a gelling agent and/or a water-soluble polymer to water or a mixture of water and an organic solvent, heating and dissolving the mixture, and then cooling and solidifying the mixture. When solidified by cooling, the fluidity disappears and becomes a gel, but depending on the case, there is no problem even if some fluidity remains. Gelling agents include soap, benzalized sorbitol, etc., and water-soluble polymers include carrageenan, agar, starch, pullulan, molasses, carboxymethylcellulose, hydroxyethylcellulose, vinylpyrrolidone polymers,
Vinyl alcohol polymer, acrylamide polymer, α, β-ethylenically unsaturated carboxylic acid,
Examples include copolymerization or graft polymerization of α,β-ethylenically unsaturated sulfonic acid/hydroxyalkyl acrylate. The content of the above fraction in the aqueous gel can be selected arbitrarily, but from 0.01 to
It is often selected from the range of 30% by weight, especially 0.1 to 10% by weight. In addition, glyoxal and other deodorants may be used together with the Camellia family plant fraction. In the present invention, porous granules (a) adsorbed with a plant fraction from the Camellia family are housed in a tank A having a large number of ventilation holes. On the other hand, an aqueous gel (B) containing a plant fraction of the Camellia family whose volume decreases over time is housed in a transparent tank (B) which allows only the above-mentioned ventilation. The reason why the tank body B is made transparent is to enable visual confirmation of the amount of reduction in the aqueous gel B contained therein. The sizes of both the tubs A and B are set to be approximately the same, so that when the tubs A and B are connected by the connecting member 4, they form a twin shape. As the connecting member 4, a lid, a receiver, etc. that can fit both the tank body A and the tank body B are used. Since both tank body A and tank body B have air permeability, both the porous granular material a adsorbing the plant fraction of the Camellia family and the aqueous gel B containing the plant fraction of the Camellia family can be ventilated with the outside air. It becomes possible. The deodorizing structure of the present invention is used to remove odors inside a storage warehouse. A typical storage room is a refrigerator, and the deodorizing structure of the present invention can effectively remove odors inside the refrigerator. In addition, it can also be used to remove odors such as musty odor, sweat odor, rotten odor, animal odor, pungent odor, etc. from shoe cabinets, lockers, food storage, medicine storage, chests of drawers, closets, pet houses, storerooms, etc. Can be used. Function and Effects of the Invention In the deodorizing structure of the present invention, since the porous particles a have a large contact area with the surrounding air,
It has the effect of trapping odor components on the surface of granules. In particular, when unglazed granules are used as the porous granules, the deodorizing power of the plant fraction of the Camellia family and the deodorizing power of the unglazed granules themselves work together to provide even better deodorizing power. On the other hand, the aqueous gel b mainly has the effect of trapping odor components in the air by volatilizing the Camellia family plant fraction along with the volatilization of the solvent components. In other words, in the fight against odor components, the porous particulate material a participates in the ground battle, and the aqueous gel b participates in the aerial battle. As a result, the deodorizing spectrum width becomes extremely wide. As can be understood from Reference Examples 1 and 2 described later, the degree of contribution of the porous particulate material a to the deodorizing power is greater than that of the aqueous gel b. However, the aqueous gel b plays another important role. In other words, there is no change in the appearance of the porous particulate material a, but the volume of the aqueous gel b decreases over time due to the volatilization of the solvent component, so it is an indicator to determine whether the deodorizing power remains or not, that is, an end point determination. It serves as an indicator for In this way, in the present invention, the porous particulate material a
and aqueous gel b each have a deodorizing effect, and they skillfully complement each other's disadvantages when used alone, so they exert maximum power as a deodorizing structure for removing odors from inside storage. . The unique twin-like appearance of the deodorizing structure of the present invention not only emphasizes the functions of the porous particulate material a and the aqueous gel b in terms of morphology, but also has an aesthetic point of view.
It is also favorable in terms of customer attraction. Furthermore, since the entire device is compact and simple, it is suitable for deodorizing small spaces and is advantageous in terms of manufacturing cost. In addition, the deodorizing structure of the present invention maintains its deodorizing function for a long period of time, and since it does not re-release odor components once absorbed, it does not pollute the atmosphere inside the storage room. Therefore, the present invention is extremely useful in practice. Examples Next, the present invention will be further explained with reference to examples. Embodiment FIG. 1 is a perspective view showing an example of the deodorizing structure of the present invention. However, illustration of the stored items is omitted in the drawings. Dry tea leaf powder is carbonized to 180-200℃/20mm.
A fraction was obtained by boiling with Hg. The maximum absorption in the ultraviolet spectrum of a 1000 times aqueous solution of this fraction is
276±2 mμ, and 20% of this fraction (W/
W) The refractive index, optical rotation, and specific gravity of the propylene glycol solution were as follows. Refractive index: n ²⁰ _D = 1.418 ± 0.02 Optical rotation: α ²⁰ _D = 0.007° ± 0.002° Specific gravity: d ²⁰ ₂₀ = 1.025 ± 0.02 Into the diluted aqueous solution of the tea leaf fraction obtained above, unglazed powder was added to a diameter of 3.5 mm. Particles shaped into small spheres of 1.0 mm in size were put into the solution, immersed for a short time, then pulled out and dried with hot air at a temperature of 60° C., so that 4% by weight of tea leaf fraction was adsorbed onto the unglazed particles. (Hereinafter referred to as particles a) In addition, 2% by weight of the tea leaf distillate obtained above, 1.5% by weight of carrageenan and 96.5% by weight of water were heated and mixed at a temperature of 80°C to form a uniform solution, and then allowed to cool to room temperature. Upon cooling, a clear aqueous gel was obtained. (hereinafter gel b
It is called. ) Prepare the tank body shown in Figure 1, and add 50g of the above particles a.
is stored in a tank A having a large number of slots 1, and 50g of the gel B is stored in a colored transparent tank B with only the top open, and two heads 3 and 3' having slots 2 are placed. The above-mentioned tank bodies A and B were fitted from below into the respective heads 3 and 3' of the lid body as an example of the connecting member 4 provided. Using the deodorizing structure produced in this manner, the performance of removing various odors was investigated. As a comparative example, a commercially available deodorizing device containing 60g of activated carbon in a box with many slots was also used.
Similarly, the removal performance of various odors was investigated. Regarding the case where only tank body A containing particles a is attached to the lid 4 (Reference example 1), and the case where only tank B containing gel b is attached to the lid 4 (Reference example 2). Similarly, the removal performance of various odors was investigated. For the odor sources, ammonia, trimethylamine, hydrogen sulfide, and acetic acid were selected as individual odors, and a food odor that had started to deteriorate slightly was selected as a compound odor. (a) Ammonia odor removal performance A container containing 2 ml of 3% (wt%) ammonia water and a deodorizing agent was placed in a 2000 cm ³ airtight container, and the container was sealed. 1
After 3 hours, 2 hours, and 3 hours, 50 ml of headspace gas was collected, bubbled into dilute sulfuric acid, and colored with Nessler's reagent.
Absorbance at 400 nm (OPtical density x 10) was measured. The results are shown in Table 1.

[Table] (B) Repeated deodorization performance of ammonia odor After completing the measurement in (1) above, repeat the operation of adding 2 ml of 3% (wt%) ammonia water and measuring the residual concentration 24 hours later. Ta. The results are shown in Table 2.

[Table] (c) Re-releasing properties of adsorbed ammonia After completing the repeated test in (2) above, the container containing the deodorizer was placed in a 2000 cm ³ airtight container containing no ammonia gas and allowed to stand still. One hour later, headspace gas was sampled and the absorbance was measured in the same manner as in (1) above. The results are shown in Table 3.

[Table] (d) Trimethylamine odor removal performance 2 ml of a 3% (wt%) trimethylamine aqueous solution and a deodorizing tool were placed in a 2000 cm ³ airtight container, and the container was sealed.
After 1 hour, 2 hours, and 3 hours, 1 ml of headspace gas was collected and injected into a gas chromatograph. The results are shown in Table 4.

[Table] (e) Repeated deodorizing performance of hydrogen sulfide odor A container containing a deodorizer was placed in a 2000 cm ³ airtight container, and 7000 ppm of hydrogen sulfide was injected. After 24 hours, 50 ml of headspace gas was taken with a syringe and the residual concentration was measured with a detection tube. After the measurement was completed, an additional 7000 ppm of hydrogen sulfide was injected, and the residual concentration was measured 24 hours later, and this operation was repeated. 5th result
Shown in the table.

[Table] (F) Performance in removing acetic acid odor 1 ml of glacial acetic acid and a container containing a deodorizer were placed in a 2000 cm ³ airtight container and the container was sealed. 1 hour later, 2 hours later, 24
After an hour, 1 ml of headspace gas was taken and injected into the gas chromatograph. The results are shown in Table 6.

[Table] (g) Performance in removing food spoilage odors When storing 1.2 kg of food (fish, meat, and vegetables) that has started to spoil slightly as a source of odors in the refrigerator compartment of a household refrigerator with a refrigerator capacity of 116 cm, A container containing deodorizer was also placed on it. After 24 hours had passed, the degree of odor was examined at the same time as the refrigerator door was opened. The results are shown in Table 7. In Table 7, "blank" refers to the case where no deodorizing agent was used. Odor detection was carried out by six trained panelists and judged on the following six levels. Odor intensity 0...Odorless 1...Odor that can be easily detected 2...Weak odor that tells you what the odor is 3...Odor that can be easily detected 4...Strong odor 5...Strong odor

【table】 [Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the deodorizing structure of the present invention. However, illustration of the stored items is omitted in the drawings. A, B...tank body, a...porous granules adsorbing a plant fraction of the Camellia family, b...aqueous gel containing a plant fraction of the Camellia family that decreases in volume over time, 1
...Slot, 2...Slot, 3,3'...Head, 4...
...Connection member, lid body.

Claims (1)

[Scope of utility model registration request] Porous granular material adsorbed with Camellia plant fraction a
is housed in a tank body A having a large number of ventilation holes, while an aqueous gel b containing a plant fraction of the Camellia family whose volume decreases over time is housed in a transparent tank body B that allows ventilation only in the upper part, and A deodorizing method for removing odors in a storage warehouse, which is characterized in that the sizes of both the tank bodies A and B are approximately the same, and that the two tank bodies A and B are connected in a twin-like manner by a connecting member 4. Structures for use.