JP2007190518A - Air filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air filter which keeps clogging suppressed with a simple structure for suppressing the cost and the load for maintenance. <P>SOLUTION: The air filter is employed for purifying air by removing fats and oils contained in air and an enzyme for decomposing fats and keeps oils carried by the surface of the filter medium. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air filter used in an apparatus for purifying air containing fats and oils mainly in a kitchen or kitchen.

  When exhausting in a kitchen or kitchen, an air filter is used because it is necessary to purify the air by removing oil and fat contained in the air. As an air filter, a relatively inexpensive fibrous filter such as a non-woven fabric is generally used. Since the air filter is used to filter out oil and fat with the fiber, the filtered fat and oil is accumulated in the air filter, and clogging occurs when the accumulated amount increases. When clogging occurs, the pressure loss when air passes through the air filter increases, so it is necessary to replace the air filter when the pressure loss exceeds a predetermined level, and maintenance is troublesome because the conventional filter has a short life. The cost was increased.

  Thus, in order to suppress the clogging of the air filter and to extend the life thereof, those that decompose or remove the filtrate accumulated by various methods have been developed (see, for example, Patent Document 1 and Patent Document 2).

  The thing shown by patent document 1 is an element for gas processing, Comprising: By providing the base material sheet | seat with which titanium oxide was carry | supported, oil and fat and carbon can be decomposed | disassembled using the photocatalytic action of titanium oxide. However, in this case, since it is necessary to irradiate the titanium oxide with ultraviolet rays, an ultraviolet lamp is provided.

  In addition, in the filter disclosed in Patent Document 2, when the filter is clogged, the cleaning liquid in the cleaning liquid tank is sprayed on the filter as mist droplets by the vibration of the ultrasonic vibrator, and the filtrate accumulated in the filter is removed. It is made to melt | dissolve and wash | clean and is equipped with apparatuses, such as the said ultrasonic vibrator.

All of the conventional filters as described above have means for decomposing or removing the filtrate accumulated in the filter. However, in Patent Document 1, it is necessary to provide an ultraviolet lamp. In Patent Document 2, it is necessary to provide an ultrasonic transducer, which increases the cost of the apparatus, increases costs, and requires installation space, further complicating installation work. .
JP-A-11-207116 JP 2001-25933 A

  The present invention has been invented in view of the above problems, and an object of the present invention is to provide an air filter that can reduce clogging with a simple configuration and can reduce maintenance costs and labor. is there.

  In order to solve the above-mentioned problem, the invention according to claim 1 is an air filter that purifies air by removing fats and oils contained in the air, and comprises an enzyme that decomposes fats and oils on the surface of the filter medium. It is characterized by being supported.

  With such a configuration, the oil and fat filtered by the filter medium can be decomposed by the enzyme supported on the surface of the filter medium, and the oil and fat filtered by a simple structure is accumulated in the filter. It is possible to suppress clogging, and maintenance costs and labor can be reduced.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the filter medium is formed of fibers made of a fabric or a non-woven fabric.

  By setting it as such a structure, it becomes possible to form a filter medium at low cost.

  The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the filter medium is formed in a pleated shape.

  By setting it as such a structure, the air containing fats and oils contacts the surface of a filter medium more widely, and it is easy to be trapped, and a removal rate improves.

  In the present invention, the fats and oils filtered by the filter medium can be decomposed by an enzyme supported on the surface of the filter medium, and the filtered fats and oils are accumulated in the filter and clogged with a simple configuration. Thus, maintenance costs and labor can be reduced, and the service life of the air filter can be extended.

  Hereinafter, the air filter of the present invention will be described.

  The air filter of the present invention is mainly provided in a place where a large amount of air containing oil and fat is generated, such as a kitchen or kitchen, but is not particularly limited.

  As the filter material of the air filter, those that remove oil and fat are usually formed of a fibrous material made of a fabric or a nonwoven fabric, but are not particularly limited.

  As a material for the filter medium, various fibers such as synthetic fibers such as polyethylene fibers and polyolefin fibers such as polypropylene fibers and glass fibers are used, but are not particularly limited.

  And the enzyme which has the capability to decompose | disassemble fats and oils is carry | supported on the surface of a filter medium. Examples of the enzyme include lipase. Enzyme is supported on the surface of the filter medium by immersing the filter medium in a liquid in which the enzyme is dispersed in water. It becomes a state. Also, the filter may be sprayed on the filter and dried, or the powdered enzyme may be attached to the surface of the filter medium with an adhesive member such as an adhesive, and is not particularly limited.

  The filter medium is formed by housing plate members in an outer frame portion that is formed in a square shape when viewed from the front by combining four upper, lower, left and right members. Here, it is preferable that the filter medium is accommodated in a zigzag shape (pleated shape) within the thickness of the outer frame portion in the front-rear direction (width of the plate-like member), whereby the planar filter medium is arranged in the air flow direction. Compared with the case where it is arranged vertically, the air containing the oil and fat passing through the filter medium is more easily captured because it comes in contact with the surface of the filter medium more broadly, and the removal rate is improved. It can be moved and dropped by wind pressure to the bent part of the filter medium at the rear end in the flow direction.

  Oils and fats are filtered through the filter medium, but by loading the enzyme on the surface of the filter medium in this way, the filtered oil and fats can be prevented from accumulating in the filter and clogging. In addition, it is possible to prevent clogging by a simple configuration of once carrying an enzyme before use, so that maintenance costs and labor can be reduced, and the life of the air filter can be extended. It is. In addition, the filter medium can be formed at low cost by forming the filter medium with fibers made of fabric or non-woven fabric.

  Moreover, since the experiment for verifying the effect of this invention was conducted, the result is demonstrated.

  The filter medium used was “PA305” (trade name) manufactured by Japan Vilene Corporation. In addition, “Green Bio 101RY” (trade name) manufactured by Daiwa Chemical Industry Co., Ltd. was used as an enzyme that decomposes oil. Here, the filter medium 500 × 500 was formed by spraying 150 g of the liquid enzyme on a filter with a spray and drying. The increase in weight measured after drying was about 59 g (ie, 59 g of enzyme component was supported).

  As a comparative example, a filter medium similar to the above-described filter medium that does not carry an enzyme was prepared.

  The examples and comparative examples were placed in an actual kitchen under the same conditions and used for about 2 weeks. In this experiment, the size of clogging was compared, and clogging was evaluated by pressure loss.

  The results are shown in Table 1.

  From this result, in the example, the increase in pressure loss is as small as 1 pa in comparison with before and after use, whereas clogging does not progress, but in the comparative example, before and after use. And the increase in pressure loss is as large as 6.9 pa, indicating that clogging is progressing. In addition, although the pressure loss is higher in the example before use, this is because the enzyme is loaded, and after use, it is smaller than the comparative example and the increment is small as described above. Therefore, even if the use is continued further, there is no problem for the time being. However, in the comparative example, the pressure loss is already increased and further increase is expected, and it is necessary to replace it.

  From the above results, the effect of the present invention was demonstrated.

It is sectional drawing of the air filter of one Embodiment of this invention.

Explanation of symbols

1 Air filter 2 Outer frame 3 Filter media

Claims (3)

  An air filter for purifying air by removing fats and oils contained in the air, wherein an enzyme that decomposes fats and oils is supported on the surface of the filter medium.   2. The air filter according to claim 1, wherein the filter medium is formed of fibers made of a fabric or a non-woven fabric.   The air filter according to claim 1 or 2, wherein the filter medium is formed in a pleat shape.

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