JP2006326231A - Formaldehyde eliminating and deodorizing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and apparatus for decomposing, eliminating and deodorizing formaldehyde in the air, efficiently reducing formaldehyde, which evaporates from formalin to probably exert a bad influence upon the human body, in the space of facilities while formalin is a drug essential to disinfection and biological tissue treatment or the like and suitably used in the medical care facilities. <P>SOLUTION: According to this method, formaldehyde decomposing and eliminating agent is continuously or intermittently atomized at need by an ultrasonic atomizer to reduce the formaldehyde in the space of the facilities using it. For example, when the formaldehyde decomposing and eliminating agent is automatically atomized intermittently by the ultrasonic atomizer by a method shown in Fig. 1, the interval of atomizing the formaldehyde decomposing and eliminating agent is short immediately after the use of formalin, and the atomizing interval is made longer after the lapse of fixed time, whereby the formaldehyde concentration in the facilities is efficiently and actively reduced without taking much labor. A water soluble deodorizer is used in the method and apparatus to perform deodorization. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a method and apparatus for decomposing and removing formaldehyde in indoor air, which is harmful to humans.

The harmful effects of formaldehyde on humans, including carcinogenicity, are generally felt when the concentration in the air is 0.5 ppm, and most people are irritating to the eyes and nose / throat at 0.8 ppm. It is supposed to feel. It is also considered that chemical sensitivity is caused by being absorbed by the human body over a long period of time even at low concentrations. According to the guidelines of the Ministry of Health, Labor and Welfare, the guideline value is set so that the concentration in formaldehyde air is 0.08 ppm or less, and the specified workplace is 0.25 ppm or less. A 30-40% aqueous solution of formaldehyde is formalin, and it is frequently used in the medical field as a disinfectant or biological tissue treating agent. Formaldehyde is frequently used as an organic solvent for bonding building materials and the like. Formaldehyde decomposition includes a formaldehyde decomposition remover, and amino acid-based or urea-based ethylene urea is known as a main component. Ethyleneurea dissolves in water and alcohol and is used in paints and adhesives. In addition to paints and adhesives, there are can spray type formaldehyde decomposition and removal agents. There are a wide variety of deodorants such as bark extract, surfactant, ozone, photocatalyst, alpha / gamma ray irradiation, activated carbon, oxygen cluster and the like. However, replacement with clean air is mainly used to reduce residual formaldehyde after use of formalin in medical facilities.

Japanese Patent Publication No. 2001-212217 discloses a formalin gas processing method and processing apparatus. In this method and apparatus, formalin gas taken into the apparatus is subjected to a cold water cleaning process in a closed space and sprayed into the original room. Japanese Patent Publication No. 2005-97337 discloses a formaldehyde adsorbing coating material. The coating material is used to create a coating on the building material to prevent sick house syndrome after new homes and renovations.

The problem to be solved is that in hospitals, clinics, and biological tissue laboratories that handle formalin directly, it is possible to mix formaldehyde decomposition and removal agents containing amino acids and ethylene urea with paints and adhesives for building materials. Even with sprays containing decomposition / removal agent, there are various conditions for indoor building materials, room size, formaldehyde concentration, etc., and it is not possible to voluntarily reduce formaldehyde. If a formaldehyde decomposition / removal agent containing amino acid or ethylene urea is mixed with a paint or adhesive for building materials, the effect is several years even if formaldehyde generated from the building material adhesive is decomposed. When using a can spray, a person always intervenes and must spray properly in the room, and it is difficult to expect an appropriate effect. Conventional deodorants are passive and relatively time-consuming to reduce formaldehyde. In medical and research facilities that handle formalin, replacement with clean air cannot be expected to reduce formaldehyde, reducing human health risks. Absent. Furthermore, it deodorizes unpleasant odors.

A formaldehyde decomposition remover or deodorant diluted with water is atomized by an atomizer and sprayed indoors, reducing the formaldehyde concentration or odor in the indoor air, and two spraying time zones linked to the atomizer A spraying time and spraying interval of atomized air can be arbitrarily selected from continuous to intermittent with an intermittent timer, and a formaldehyde decomposition removal or deodorizing method that adjusts the amount of spraying air according to the size of the spraying space is provided. Diluent water in which the formaldehyde decomposition / removal agent is urea-based, particularly blended within the range of 0.1% to 5.0% by weight of ethylene urea is preferable. A water-soluble deodorant is also preferable as the deodorant. Further, the atomizer is preferably an ultrasonic atomizer, but not limited thereto. The intermittent timer provides a method in which the spraying time is constant and the spraying interval is intermittently controlled, and formaldehyde decomposition / removal or deodorization can be easily selected so that control of the spraying time zone such as day and night can be arbitrarily selected.

A suction port for sucking indoor air enabling the above method, an atomizer for atomizing the air with formaldehyde decomposition / removing agent or deodorant diluted water, two intermittent timers, a fan air volume control unit, atomized air A formaldehyde removal or deodorization apparatus that is electrically and mechanically controlled with the main spray nozzle as a main component is provided. The spray time and spray interval of the atomized air can be arbitrarily selected from continuous by the intermittent timer to intermittent. Furthermore, the air suction port of the formaldehyde removing or deodorizing apparatus is provided at a position close to the floor. For the spraying interval of the atomized air, for example, an intermittent timer device of about 1 minute spraying is provided every hour from a continuous several minutes interval depending on a spraying time zone. At this time, at least two intermittent timers for the spray time zone are required by dividing the spray time zone such as day and night. In order to subdivide the spray time zone, a plurality of intermittent timers suitable for each time zone are required.

In facilities where formalin is heavily used, the concentration of formaldehyde decomposition / removal agent in the diluted water of the method and apparatus of the present invention is increased, and when the concentration of formaldehyde in the facility is low and it slightly smells, low mixing is sufficient. In the present invention, the person in charge of the facility can arbitrarily select the spray interval of the formaldehyde decomposition / removal agent, and also select the concentration of formaldehyde decomposition / removal agent used, the amount of spray diffused air in the fan air volume control unit, and the amount of atomization in the ultrasonic atomizer I can do it.

Formaldehyde reduction includes amino acid-based and formaldehyde decomposition / removal agents containing ethylene urea and oxygen clusters. In the present invention, since an ultrasonic atomizer is used, it is preferable to use a water-soluble substance as a main component. Regardless of urea alone.

The method and apparatus for decomposing and removing formaldehyde in indoor air, which is harmful to humans, according to the present invention can be used in ordinary homes and schools and is not related to medical facilities. The formaldehyde decomposition / removal agent used in the present invention, particularly amino acids and ethylene urea, not only removes formaldehyde but also has sterilization and deodorizing effects. The method and apparatus for decomposing and removing formaldehyde in the air according to the present invention can be safely used for removing formaldehyde even in ordinary households and facilities using building materials that use formalin, which causes sick house syndrome.

In the method and apparatus for decomposing and removing formaldehyde in indoor air according to the present invention, if the air suction port is provided at the lower part of the apparatus and the atomizing air spray port is provided at the upper part of the apparatus, the effect of reducing or removing formaldehyde in the room is improved. . This apparatus is composed of a suction port, an atomizer, an intermittent timer, a fan air volume control unit, a spray port and necessary electrical and mechanical control devices as main functions. The water supplied to the atomizer is a water-soluble formaldehyde decomposition / removal agent or a deodorant-containing diluted water.

In medical facilities where formalin gas remains at a high concentration, formaldehyde can be decomposed and removed or deodorized efficiently and quickly by using the method and apparatus of the present invention, and the concentration of formaldehyde in air in accordance with the guidelines of the Ministry of Health, Labor and Welfare is 0.08 ppm or less. , Always suppressed. In particular, immediately after use of formalin, the spray interval of the formaldehyde decomposition / removal agent by the formaldehyde reduction device of the present invention is shortened, the formalin unused time zone such as night is set longer, and an intermittent timer is set as such to improve efficiency. High deodorization and formaldehyde reduction. Thereby, formaldehyde can be actively decomposed and removed regardless of day or night. Although the normal indoor air-conditioning equipment has a small effect of removing formaldehyde, the spraying method of the present invention can quickly reduce the formaldehyde concentration in the room. Further, the formalin odor can be eliminated by the method of the present invention. When the deodorant is diluted and sprayed by this method, the deodorizing effect is high when necessary, and deodorizing control such as day and night is possible.

The facility manager can arbitrarily determine the dilution concentration and spraying time of the water-soluble formaldehyde decomposition and removal agent. For example, use low dilution of formaldehyde decomposition removal agent and spray interval in hospital wards, and use formaldehyde decomposition removal agent dilution water with increased concentration in the formalin use room or use frequent spraying. Water concentration and spray interval can be selected. Moreover, the amount of spray air can be adjusted according to the size of the space to spray. This is more efficient than the deodorizing effect and formaldehyde decomposing effect of sprays and paints containing formaldehyde decomposing / removing agents, and can be decomposed before human exposure to formaldehyde gas, without human intervention.

An atomizer is used for the method and apparatus for decomposing and removing formaldehyde in indoor air of the present invention. As the atomizer, an ultrasonic atomizer is used. As a method, a water-soluble formaldehyde decomposition / removal agent is diluted with water for atomization such as purified water, and sprayed into indoor air after atomization. The air suction port should be closer to the floor. The intermittent timer is necessary to set the atomization operating time. From continuous operation, spraying for 1 minute every 2 minutes, spraying for 1 minute every 5 minutes, spraying for 1 minute every 10 minutes, every 30 minutes It is good to control like spraying for 1 minute, spraying for 1 minute every 60 minutes. It is necessary to adjust the air volume and the direction of the air flow, and it is a factor that determines the formaldehyde decomposition effect together with diluted water for removing formaldehyde and two intermittent timers. The apparatus is composed of an air suction port, an atomizer, at least two intermittent timers, a fan air volume adjusting unit, an atomizing air spray port, and the like, and is electrically and mechanically controlled. The atomizer is supplied with water, and a water-soluble formaldehyde decomposition / removal agent such as ethylene urea is mixed within a range of 0.1% to 5.0% by weight to form a formaldehyde decomposition / removal agent dilution water. preferable. For simple deodorization, a water-soluble deodorant is used as dilution water. The numerical values of the intermittent timer and the formaldehyde decomposition / removal agent dilution rate of the present invention are the best numbers for carrying out the invention, but are not limited to these numerical values because various forms can be applied.

An apparatus for decomposing and removing formaldehyde was prepared. The concept of the function of the device is shown in FIG. The indoor air suction port I in FIG. 2 is located in a portion close to the floor of the apparatus. The device is used on the floor functionally and for handling. The indoor air AF sucked from the suction port I is atomized by the ultrasonic atomizer H. Diluted water DW was prepared by blending 2% ethylene urea (trade name Amtor, Amco Technology) in purified water as a formaldehyde decomposition and removal agent. The dilution water DW is mixed with the suction air AF by the atomizer H in the dilution water flow DF. The ultrasonic atomizer H can perform strong to weak control HC and can adjust the atomization amount. Spray time control TIC can be adjusted from continuous to intermittent timer. This intermittent timer is equipped with two intermittent timer controls immediately after formalin use and after some formaldehyde reduction. The atomized air HAF is sprayed from the spray port V by the fan air volume adjusting unit F. The diffusion range is adjusted by the fan air flow control FC. The wind direction is equipped with fins after the fan. The spray port V is located in the upper part of the apparatus. The spraying of the intermittent timer and the intermittent time in the spraying time control TIC of the apparatus were fixed at 1 minute for spraying, and the intermittent time was limited to a maximum of 60 minutes in 1 minute units. In the use example, when formaldehyde gas in the room after use of formalin remains at a high concentration, spraying was performed for 1 minute at intervals of 5 minutes, and atomization was performed for 1 minute at intervals of 60 minutes at night without formalin odor. . The residual amount of formaldehyde was drastically reduced in a short time and the formalin odor was reduced. When the dilution water DW bottle is emptied, the apparatus automatically stops.

The concept of the method for decomposing and deodorizing formaldehyde is shown in the example of FIG. Dilution water diluted in Example 1 was prepared for formaldehyde decomposition removal and deodorization. In order to explain the method of the present invention, an apparatus having the functions shown in FIG. The method was performed in a pathology laboratory with a floor area of about 15 m ² . Make sure that the device is shut off at the start and that the device contains diluting water containing 2% formaldehyde decomposer. The room after the use of formalin had a formaldehyde concentration of 0.5 ppm, and the formaldehyde removal apparatus was operated in parallel with the normal indoor air replacement that was performed even when formalin was used. Spraying of 2.4 cc of diluting water was activated for 1 minute at an interval of 5 minutes with the intermittent timer A of the apparatus. When this operating time was 1 hour, the formaldehyde concentration dropped to 0.06 ppm after 30 minutes and to 0.04 ppm after 1 hour. Thereafter, spraying for 1 minute was performed with an intermittent timer B at 60-minute intervals until the next formalin use, such as when using the same room or at night, to further reduce the formaldehyde concentration. Diluted water containing formaldehyde decomposer was inspected and replenished before the scheduled end of use. Deodorizing effect was also obvious.

The method and apparatus of the present invention for decomposing and removing formaldehyde in indoor air is particularly effective for use in facilities that handle formalin. The odor and sick house syndrome mainly caused by formaldehyde can be reduced, and a deodorizing effect is expected. The method and apparatus of the present invention can also be used in ordinary households and general facilities.

These are the flowchart figures which show the concept for demonstrating the formaldehyde concentration reduction and deodorizing method of this invention. These are figures which show the concept for demonstrating the formaldehyde removal and deodorizing apparatus of this invention.

Explanation of symbols

AF. . . . . Suction air flow DF. . . . . Flow of dilution water containing formaldehyde decomposition / removal agent or deodorant DW. . . . . Formaldehyde decomposition remover or deodorant-containing diluted water . . . . . Fan air volume control unit FC. . . . . Fan air volume control . . . . . Ultrasonic atomizer HAF. . . . Atomized air flow HC. . . . . Atomization control . . . . . Indoor air suction port TIC. . . . Two intermittent timer controls V. . . . . . Atomizing air spray port

Claims (8)

A formaldehyde decomposition remover or deodorizer diluted with water is atomized by an atomizer and sprayed into the air to reduce the formaldehyde concentration or odor in the air, and intermittently linked to the atomizer by the spraying time zone A formaldehyde decomposition removal or deodorization method, wherein a spraying time and a spraying interval are arbitrarily selected from continuous to intermittent by timer control. The method for decomposing and removing formaldehyde according to claim 1, wherein dilution water blended in a range of 0.1% to 5.0% by weight of amino acid or urea is used as the formaldehyde decomposition and removal agent. The method for decomposing or removing formaldehyde according to claim 1, wherein the atomizer is an ultrasonic atomizer. The formaldehyde decomposition removal or deodorization method according to claim 1, wherein the spraying time is constant, the spraying interval is intermittent, and at least two intermittent timer controls are arbitrarily selected according to the spraying time zone. . 2. The formaldehyde decomposition removal or deodorization method according to claim 1, wherein the amount of spray air is adjusted in accordance with the size of the spraying space. Suction port for sucking indoor air, dilution water containing formaldehyde decomposition / removal agent or deodorizer, atomizer for atomizing suction air with the dilution water, at least two intermittent timers for atomization control, fan air volume adjustment unit A formaldehyde removal or deodorizing apparatus characterized by being controlled electrically and mechanically with an atomizing air spray port as a main component. 7. The formaldehyde removal or deodorization apparatus according to claim 6, wherein the atomizing air spraying time and spraying interval can be arbitrarily selected from continuous to intermittent by at least two atomization control intermittent timers depending on the spraying time zone. 7. The spray interval of formaldehyde decomposition / removal agent or deodorant, the concentration of formaldehyde decomposition / removal agent or deodorant in diluted water, the amount of spray diffused air with a fan or the amount of atomization with an atomizer can be selected. The formaldehyde removal or deodorization apparatus as described.

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