Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Process control in response to analysis
Patent
1998-03-12
1999-10-05
Till, Terrence R.
Chemical apparatus and process disinfecting, deodorizing, preser
Process disinfecting, preserving, deodorizing, or sterilizing
Process control in response to analysis
422 4, 422 5, 422 22, 422105, 422116, 422121, 42218607, 422306, 422900, 95 3, 95 8, 96417, 96419, 96424, A61L 214
Patent
active
059619198
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a deodorizing and disinfecting apparatus using ozone.
BACKGROUND ART
Since ozone exhibits a strong oxidizing action, it has been used in many fields such as water treatment, medical and food industries in recent years, in order to perform deodorization, disinfection and the like. Lately, attention has been paid to ozone for use in various countermeasures for odors in living spaces, and many apparatuses using ozone have been developed.
As described above, ozone exhibits such useful action. However, ozone itself has special odor. Therefore, when ozone is used for an apparatus, it is necessary to prevent ozone from being discharged to the outside of the apparatus. For this reason, ozone remaining after treatment is subjected to a thermal decomposition method or a decomposition method with a catalyst. Among these methods, the method with the catalyst is relatively simple, and thus generally used. However, in the method of decomposing ozone by using the catalyst, there is apprehension that the activity of the catalyst lowers gradually, and ozone in an excessive concentration is discharged to the outside of the apparatus after use for a long period of time or because of changes in environmental conditions or the like.
DISCLOSURE OF INVENTION
An object of the present invention is to provide a highly reliable deodorizing and disinfecting apparatus capable of preventing a discharge of remaining ozone to the outside of the apparatus even when the catalyst is deteriorated.
The present invention provides an ozone deodorizing and disinfecting apparatus comprising an ozone generating portion, a catalyst having functions for accelerating ozone deodorizing and disinfecting actions and for decomposing the ozone, an ozone sensor and an air supply portion, and additionally having functions for repeating a cycle including temporary stop of ozone discharge when the concentration of ozone remaining after treatment by the catalyst reaches a predetermined concentration or more and resumption of ozone discharge after an elapse of a predetermined time period, and then for determining that the catalyst has been deteriorated when a tendency wherein an interval between times when the concentration of the remaining ozone reaches a predetermined concentration becomes shorter than a predetermined time period is recognized at a predetermined frequency.
The deodorizing and disinfecting apparatus having the catalyst deterioration detection function of the present invention comprises: an air supply portion for inhaling air inside; an ozone generating portion for discharging ozone to the inhaled air; a catalyst for accelerating the deodorizing and disinfecting actions and for decomposition of ozone, disposed downstream from the ozone generating portion; and an ozone sensor for detecting the concentration of remaining ozone, disposed downstream from the catalyst; and further comprising means for repeating a cycle including stop of ozone discharge from the ozone generating portion for a predetermined time period when the ozone sensor detects that the concentration of the remaining ozone is not less than a predetermined concentration, and for determining that the catalyst has been deteriorated when a condition wherein an interval between times when the concentration of the remaining ozone in the continuous cycles is not less than a predetermined concentration becomes shorter than a predetermined time period is recognized at a predetermined frequency thereby stopping ozone discharge.
Furthermore, it is preferable that the apparatus further comprises alarm means for notifying that the catalyst has been deteriorated when the catalyst is determined to be deteriorated and ozone discharge is stopped. By this means, the user can be accurately notified of the need for replacement of the catalyst by indication, alarm sound or the like.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a sectional schematic view showing a deodorizing and disinfecting apparatus in accordance with an embodiment of the present
REFERENCES:
patent: 4343765 (1982-08-01), Elston et al.
patent: 5034367 (1991-07-01), Falke et al.
patent: 5681533 (1997-10-01), Hiromi
patent: 5752878 (1998-05-01), Balkany
patent: 5788930 (1998-08-01), McMurray
Hattori Akiyoshi
Tachibana Hirokazu
Yoshida Akihiko
Yoshiike Nobuyuki
Matsushita Electric - Industrial Co., Ltd.
Moazzam Fariborz
Till Terrence R.
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