JP2007064709A - Deodorization testing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorization testing machine (e.g., a presenting testing machine for performing a deodorizing capacity recognizing test of a deodorant before customers) capable of visually showing a process for finally decomposing a malodorous gas into water and carbon dioxide, to simply prove the effects of adsorption, deodorization, decomposition, etc. <P>SOLUTION: A deodorizing substance having the deodorant supported thereon is placed in a sample chamber, a definite amount of the malodorous gas is injected in the sample chamber and a malodor is decomposed by circulating air in the sample chamber to accumulate carbon dioxide in the gas. The increase situation of the concentration of carbon dioxide is visually recognized by inserting a color developing device reacting with carbon dioxide to develop a color in the circulating route. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a deodorization tester capable of objectively and simply evaluating the deodorizing ability.

  In recent years, with the increase in airtightness of houses, as represented by sick house syndrome, for example, a small amount of volatile organic compounds (VOC) such as formaldehyde, which are generated from house building materials, are used in the mucous membranes of human eyes, nose, throat, etc. It is considered to be a cause of various symptoms. On the other hand, the consumer's preference for cleanliness has progressed, and not only formaldehyde but also body odors, food odors, and other odors such as pet odors and garbage odors are mixed, resulting in a highly airtight indoor space. The problem of contamination of the indoor living environment has rapidly been regarded as a problem because it has become awkward and uncomfortable.

  Along with this, many technologies that provide functionality such as deodorization, adsorption, and deodorization have been disclosed and put into practical use, but when trying to demonstrate the effect, the experimental apparatus becomes large and expensive. The development of testing machines that easily demonstrate the effects of adsorption, deodorization, decomposition, etc. is desired at sites where malodors occur.

  In Patent Document 1, a vertical cylindrical apparatus having a front chamber and a rear chamber across a sample chamber in which a sample is placed, and a gas is allowed to flow from the front chamber to the sample chamber and the rear chamber. The technology of an odor adsorption concentration comparison tester is disclosed in which a gas is quantitatively exposed to a sample and the measured value does not vary even when the time and place are changed, and reliable data can be obtained.

JP-A-5-18947

  However, the above method is an effective method for accurately measuring the adsorption performance of various odorous gases in indoor air, but the malodorous gas is decomposed by a catalyst or the like and finally decomposed into water and carbon dioxide. It was not something to show that. The present invention visually shows a process in which malodorous gas is decomposed and finally decomposed into water and carbon dioxide, and can easily demonstrate the effects of adsorption, deodorization, decomposition, etc. (for example, As a confirmation test of deodorant performance of deodorants, it will be developed as a test machine for presentations to be tested in front of customers.

  In the present invention, a deodorant or a fiber carrying a deodorant is placed in a sample chamber, a certain amount of malodorous gas is injected and sealed, and air in the sample chamber is circulated to decompose bad odor. In this way, carbon dioxide in the gas accumulates and it is possible to visually confirm how the concentration increases. In order to achieve the above object, the present invention provides the following means.

  [1] In a deodorization tester comprising a sample chamber and a circulation device for circulating a gas in the sample chamber, a coloring device that reacts with carbon dioxide and inserts a coloring device in the gas circulation path. Deodorization testing machine.

  [2] The deodorization tester according to [1], wherein the color development device is a color development device filled with potassium oxide or hydrazine and an indicator.

  [3] The deodorization tester according to [1] or [2], wherein the color developing device that develops color in response to carbon dioxide is a color developing device that changes the color density according to the carbon dioxide concentration.

  In the invention of [1], since the coloring device that reacts with carbon dioxide in the gas circulation path is inserted, it is possible to visually confirm carbon dioxide generated by the decomposition of malodor, Even people without specialized knowledge can confirm the generation of carbon dioxide.

  In the invention of [2], since potassium oxide or hydrazine in the color developing device reacts with carbon dioxide and the indicator develops a purple color, the color change can be visually observed to confirm the generation of carbon dioxide.

  In the invention of [3], since the color developing device changes the color density according to the carbon dioxide concentration, the concentration of carbon dioxide can be specified from the color of the color developing device to roughly estimate the malodorous gas concentration. it can.

  Hereinafter, the present invention will be described in more detail with reference to FIG. The present invention includes a sample chamber 2, a circulation device 3 that circulates gas in the sample chamber, a gas circulation path 4, and a coloring device 5. Odor gas is put into the sample chamber 2, the circulation device 3 is operated to make the gas in the sample chamber uniform, and it is confirmed that the color developing device 5 is not colored. Thereafter, a deodorizing material is placed in the sample chamber 2, and the color developing device 5 is observed to gradually develop color, and an increase in carbon dioxide is confirmed, and it is objectively confirmed that malodorous gas is decomposed. be able to.

  The sample chamber 2 is not particularly limited as long as a sealed space is secured, but a transparent sealed container is preferable so that an internal situation can be confirmed. The volume may be 1 to 20 liters, and preferably includes the gas injection port 6 and the deodorant insertion port 7.

  The circulation device 3 is for circulating the gas in the sealed sample chamber at a constant speed, and may be a pump, a blower or the like.

  The circulation path 4 is provided with a gas inlet and a discharge port on the wall surface of the sample chamber, and is connected by a pipe so that no gas leaks. The circulation apparatus 3 and the color development apparatus 5 are inserted in the middle of the circulation path 4.

  The color developing device 5 is a transparent container, and potassium oxide or hydrazine and an indicator may be packed at a density at which gas in the sample chamber passes by a pump, a blower, or the like. When there is no carbon dioxide, it is white, but as the amount of carbon dioxide increases, it becomes purple and the concentration increases.

<Example 1>
As shown in Fig. 1, pure air is introduced into a sample chamber 2 made of a transparent acrylic resin of 25 cm square and equipped with a gas injection port 6 and a sample insertion port 7. Confirm that the device 5 is not colored. Next, toluene gas is injected from the gas inlet 6 to 500 PPM, the circulation device 3 (pump) is operated for 5 minutes, the toluene gas in the sample chamber 2 is mixed uniformly, and the color developing device 5 develops color. Confirmed that there is no. Next, a deodorizing fabric (10 × 10 cm) coated with a photocatalytic deodorant was placed on the bottom of the sample chamber 2 from the sample insertion port 7 and irradiated with light, and the circulation device 3 (pump) continued to operate for 6 hours. However, it was confirmed that the toluene gas in the sample chamber 2 decreased to 300 PPM, the amount of carbon dioxide increased, and the color developing device 5 gradually changed to purple. As a result, carbon dioxide generated by the decomposition of toluene gas could be visually confirmed. A carbon dioxide detector tube manufactured by Gastec Corporation was used as the color developing device 5.

<Example 2>
The color developing device 5 was replaced with a new one, and the same procedure as in Example 1 was performed except that pure air was introduced into the sample chamber 2 in Example 1 and then toluene gas was used as 100 PPM. As in Example 1, it was confirmed that the color developing device 5 gradually changed to purple, but it was confirmed that the purple color was darker than Example 1, and that the amount of carbon dioxide generated was small. It was confirmed visually.

1 is an explanatory diagram of a deodorization testing machine 1 according to one embodiment of the present invention. FIG.

Explanation of symbols

1 Deodorization testing machine
2 Sample chamber 3 Circulating device 4 Circulating path 5 Coloring device 6 Gas inlet 7 Sample inlet

Claims (3)

  In the deodorization tester comprising a sample chamber and a circulation device for circulating gas in the sample chamber, a color developing device for coloring in response to carbon dioxide is inserted in the gas circulation path. Odor testing machine.   The deodorization tester according to claim 1, wherein the color developing device is a color developing device filled with potassium oxide or hydrazine and an indicator.   The deodorization tester according to claim 1 or 2, wherein the color development device that develops color in response to carbon dioxide is a color development device that changes a color density in accordance with the concentration of carbon dioxide.