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Exhaust purification apparatus and utilization thereof

Inactive Publication Date: 2004-06-10
NORITAKE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] With the exhaust purification apparatus of such a configuration, at least part of the contaminants (oil particles, smoke particles, dust and other nonvolatile components) present in the exhaust are trapped in the pretreatment unit. As a result, the amount of the contaminants contained in the exhaust (exhaust treated in the pretreatment unit) supplied to the photocatalytic filter is decreased. Therefore, the problem associated with the performance degradation of the photocatalytic filter caused by adhesion of the contaminants is resolved or alleviated.

Problems solved by technology

However, none of the above-mentioned exhaust purification apparatuses could effectively remove odorous components contained in the exhaust.
However, when exhaust containing a comparatively large amount of contaminants is passed through such a photocatalytic filter, the surface of the photocatalytic filter is covered with the contaminants (oil and fat components, dust, tar-like substances, and the like) trapped by the filter.
As a result, in certain cases, the photocatalyst is shielded from UV radiation and the photocatalytic effect is not demonstrated.

Method used

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  • Exhaust purification apparatus and utilization thereof
  • Exhaust purification apparatus and utilization thereof
  • Exhaust purification apparatus and utilization thereof

Examples

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first embodiment

[0063] The First Embodiment relates to the installation of the exhaust purification apparatus in accordance with the present invention in an exhaust duct leading from a kitchen to the outside.

[0064] As shown in FIG. 1 and FIG. 2, a kitchen 105 is partitioned by a structural wall 104 of a building 101. A door way 103 is formed in the structural wall 104. A plurality (for example, five) cooking stands 106 are disposed in the kitchen 105. A range hood 111 is mounted above each cooking stand 106. One end of an exhaust duct 108 extending to the rooftop exhaust release opening 112 along the outer wall surface of the building 101 is opened in the range hood 111.

[0065] The exhaust purification apparatus 107 can be said to be generally composed of a pretreatment section 117 provided in connection to one end of the exhaust duct 108, and an optical treatment section 119 provided in the vicinity of the other end inside the exhaust duct 108. A fan 114 is provided between the pretreatment section...

third embodiment

[0138] The photocatalytic unit 61 is disposed so as to cover the exhaust release opening 312 formed in the side surface of the cooking device body 301, and the photocatalytic filter 62 faces the exhaust release opening 312. The exhaust path where the photocatalytic unit 61 is disposed is in the lower portion inside the cooking device body 301. Therefore, a large space can be easily provided. The exhaust sucked in herein is released, so as to be dispersed by the fan 307 to all four sides inside the cooking device body 301. As a result, the flow velocity of the exhaust can be further decreased and odorous components, present in the exhaust, can be efficiently removed by the photocatalytic filter 62, similar to the

[0139]

fourth embodiment

[0140] The present embodiment relates to a cooking system having connected therein a plurality of cooking devices equipped with the exhaust purification apparatus in accordance with the present invention. A cooking device used in this embodiment is shown in FIG. 16. This cooking device has a configuration similar to that of the cooking device of the Fourth Embodiment; the difference between the two is described below.

[0141] The de-oiling filter 20 is disposed below the outer box 309. The dust collector 50 and the photocatalytic unit 61 are disposed one above the other at the side of the de-oiling filter. Exhaust generated from the cooking unit flows from the side surface of the inner box 308 along the lower surface toward the de-oiling filter 20 located below the inner box 308. The exhaust path in this portion is formed so as to become narrower toward the de-oiling filter 20, thereby increasing the flow velocity of the exhaust. In the present embodiment, the photocatalytic units 61 ...

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Abstract

The present invention relates to an exhaust purification apparatus for removing contaminants and odorous components from exhaust from cooking or the like, to an exhaust purification cabinet and cooking device equipped with the exhaust purification apparatus, and to a cooking system equipped with such a cooking device. The exhaust purification apparatus in accordance with the present invention comprises a pretreatment unit (117) for trapping contaminants present in the exhaust and an optical treatment unit (119) comprising a photocatalytic filter (62) and disposed downstream of the pretreatment unit. The exhaust purification apparatus is disposed, for example, in an exhaust duct extending from a kitchen. The pretreatment unit (117) preferably comprises a dust collector (50) for trapping smoke particles present in the exhaust and / or a de-oiling filter (20) for trapping oil and fat components present in the exhaust. The exhaust purification cabinet comprises the exhaust purification apparatus contained in a cabinet having an exhaust path formed therein. The cooking device comprises the exhaust purification apparatus in a cooking device body comprising the cooking unit and having an exhaust path formed inside thereof. The cooking system comprises a plurality of cooking devices and a main duct connected to exhaust release openings of the cooking units.

Description

FIELD OF TECHNOLOGY[0001] The present invention relates to an exhaust purification apparatus for the purification of exhaust. In particular, the present invention relates to an exhaust purification apparatus for the purification of exhaust containing contaminants and odorous components such as oil and fat components. Furthermore, the present invention also relates to an exhaust purification cabinet and a cooking device comprising the exhaust purification apparatus. Moreover, the present invention relates to a cooking system comprising the cooking device.BACKGROUND TECHNOLOGY[0002] When food is prepared, exhaust containing a large amount of contaminants and odorous components such as oil and fat components is generated. Japanese Utility Model Application Laid-open No. H1-97136 disclosed an apparatus for conducting purification treatment for removing the contaminants and odorous components from such an exhaust. In this apparatus, a fan and a filter are installed in the exhaust duct an...

Claims

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Application Information

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IPC IPC(8): B01D46/00B01D53/86F23J15/00F23J15/02F24C15/20
CPCB01D53/86B01D2255/802F23J15/003F24C15/2035F23J2900/15003F23J2900/15024F23J15/025
Inventor KATO, SHINJIIWATA, MISAOWATANABE, HIROKAZUKUROBE, HISANORIHIRANO, MIKIO
Owner NORITAKE CO LTD
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