This invention relates generally to appliances and, more particularly, to appliances for disinfecting and/or deodorizing an article.
Conventional home appliances, such as washing machines and/or drying machines disinfect and/or deodorize articles, such as clothes, by washing and drying the articles. However, such washing and drying processes take a considerable amount of time, and may only partially remove undesirable odors and/or microorganisms. For example, some odors, such as cigarette and shoe odors may not be effectively removed by the washing and drying processes. In addition, some articles, such as leather shoes and jackets, may not be washable and/or dryable to remove the undesirable odors and/or the microorganisms therefrom.
In one aspect, an apparatus is provided. The apparatus includes a cabinet defining a chamber, a drawer slidably positioned within the chamber and movable between an open position and a closed position. The drawer defines a compartment configured to receive a load. In the closed position, the drawer is configured to restrict air flow exiting the compartment. The apparatus includes an ozone generator positioned with respect to the compartment and configured to selectively generate ozone. The generated ozone is introduced into the compartment. An ozone conversion device is positioned with respect to the compartment and configured to selectively convert ozone to oxygen. A sensor is positioned with respect to the compartment. The sensor is configured to detect a level of ozone within the compartment and generate a signal representative of the level of ozone. The apparatus also includes a controller operatively coupled to the ozone generator, the ozone conversion device and the sensor. The controller is configured to activate the ozone generator and/or the ozone conversion device in response to a signal received from the sensor.
In another aspect, an appliance is provided. The appliance includes a cabinet defining a chamber. A drawer is slidably positioned within the chamber and movable between an open position and a closed position. The drawer defines a compartment configured to receive a load. In the closed position, the drawer is coupled to the cabinet and configured to restrict air from exiting the compartment. The appliance includes an ozone generator positioned within the cabinet and configured to produce ozone, and a fan positioned with respect to the compartment and configured to circulate ozone through the compartment.
In still another aspect, a method for treating a load is provided. The method includes providing an appliance including a cabinet defining a chamber. A drawer is slidably positioned within the chamber and movable between an open position and a closed position. The drawer defines a compartment configured to receive the load. The method also includes placing the load within the compartment. The drawer is moved to the closed position to seal the compartment. An ozone generator positioned with respect to the compartment is activated to selectively generate ozone. The generated ozone is introduced into the compartment to treat the load.
In the exemplary embodiment, cabinet 102 is made of any suitable ozone compatible material including, without limitation, a metal and/or a plastic material, such as a thermoplastic material including, without limitation, a polypropylene (PP), polyvinyl chloride (PVC) and/or polycarbonate (PC) material. Drawer 106 is movable between the retracted position and the extended position. In a particular embodiment, drawer 106 includes a retracting mechanism, such as two self-retracting slide assemblies 108 mounted on opposing sides of drawer 106. As such, drawer 106 may be pulled out to the extended position, and drawer 106 retracts back to the retracted position when the pulling force is removed. Alternatively, drawer 106 is motorized to automatically move between the retracted position and the extended position. In a further embodiment, a gasket 109 is provided between cabinet 102 and drawer 106. As such, drawer 106 is sealingly coupled to cabinet 102 in the retracted position to form a substantially air-tight seal therebetween.
In the exemplary embodiment, drawer frame 112 is made of a suitable ozone compatible material, such as a suitable metal and/or plastic material including, without limitation, PP, PVC, or PC. Lid 116 is coupled to drawer frame 112 by at least one hinge 118, and is movable between a closed position, as shown in
Front panel 114 includes a plurality of input selectors 130 and/or a display 132 mounted on an outer surface of front panel 114. Input selectors 130 and/or display 132 form a control interface 134 for user selection of operation cycles and/or operation features. Display 132 indicates the selected features and/or other items of interest to the user. A controller 136 is in operational control communication with input selectors 130 and/or display 132 for receiving from input selectors 130 and/or display 132 and/or sending to input selectors 130 and/or display 132 operational control signals. In the exemplary embodiment, controller 136 is also operatively coupled to other apparatus components to facilitate executing operation cycles and/or features, as described in greater detail below.
As shown in
A shelf 154 is positioned within load compartment 142 for supporting the articles for treatment. Shelf 154 is removable from load compartment 142 for cleaning, as desired. In a particular embodiment, a lock 160 is mounted within or positioned with respect to load compartment 142 and lid 116. In this embodiment, lock 160 is operatively coupled to controller 136, as shown in
A suitable sensor 162, such as a microswitch, is positioned with respect to lid 116 for detecting the position of lid 116. Specifically, sensor 162 is operational communication with controller 136 for detecting whether lid 116 is in the closed position. In one embodiment, sensor 162 is separately provided from lock 160. In another embodiment, sensor 162 is integrated with lock 160.
In a further embodiment, load compartment 142 also includes a humidity sensor 164, a differential pressure sensor 166 and/or a perfumer 168 positioned therein. Humidity sensor 164 detects the moisture content within load compartment 142, and differential pressure sensor 166 detects the pressure within load compartment 142. Humidity sensor 164 and pressure sensor 166 are in signal communication with controller 136. Perfumer 168 is used to introduce perfume into load compartment 142, as desired, and is coupled in operational control communication with controller 136. It should be apparent to those skilled in the art and guided by the teachings herein provided that humidity sensor 164, differential pressure sensor 166, and/or perfumer 168 may be located at any suitable position within apparatus 100 to realize the desired functions.
As shown in
An ozone sensor 188 is positioned within machinery compartment 144 for detecting a level of the ozone within load compartment 142 and/or machinery compartment 144. Ozone sensor 188 is operatively coupled to controller 136 for communicating a signal representative of the level of ozone within compartment 120. As such, controller 136 operates ozone generator 180 and/or ozone conversion device 182 in response to the signal received from ozone sensor 188. In alternative embodiments, ozone sensor 188 is located at any suitable position within apparatus 100, such as within load compartment 142 to detect the ozone level within compartment 120. In a further embodiment, a second ozone sensor 190 is provided within compartment 120 for calibrating or substituting for ozone sensor 188.
In an exemplary disinfection process of apparatus 100, controller 136 (shown in
If no leakage is detected during the selected initial time period, controller 136 initiates energizing ozone generator 180 and fan 150 to execute the disinfection process. Ozone generator 180 is energized to produce ozone and fan 150 is energized to direct generated ozone into load compartment 142. Generated ozone flows across and/or through the articles within load compartment 142 to remove from the article(s) undesired odors, and/or destroys through oxidation microorganisms, such as bacteria, viruses and/or fungi. Air within load compartment 142 is circulated through load compartment 142 and into machinery compartment 144 through ozone generator 180 and/or ozone conversion device 182. As such, a treatment air flow path is created or developed through compartment 120 during the disinfection process.
In the exemplary embodiment, ozone sensor 188 detects an initial level of the ozone within compartment 120, such as an ozone level within load compartment 142 and/or an ozone level within machinery compartment 144. The user inputs a load type, including a size and/or a type of material for the article. The user also inputs a desired disinfection treatment level, such as HEAVY, MEDIUM or LOW. Controller 136 then determines a desired ozone dosage level and a treatment time based on the initial level of the ozone, the treatment level and/or the load type.
In the exemplary embodiment, controller 136 continuously maintains compartment 120 at a desired ozone level according to the determined ozone dosage level. Controller 136 energizes or de-energizes ozone generator 180 to maintain ozone within compartment 120 at the desired level. In an alternative embodiment, controller 136 continuously energizes ozone generator 180 and energizes or de-energizes ozone conversion device 182 to maintain ozone at the desired level. In a further alternative embodiment, ozone generation is time based. Controller 136 controls an operating time for ozone generator 180, a temperature within compartment 120 and/or a speed of fan 150 to maintain a desired ozone dosage level.
In a further embodiment, controller 136 also controls the ozone generation rate based at least partially on a humidity level detected by humidity sensor 164. Controller 136 sets a first time span, T1, for energizing ozone generator 180 for a first amount of time during the disinfection process. Controller 136 also sets a second time span, T2, for energizing ozone generator 180 for a second amount of time. Upon failure of ozone sensor 188, controller 136 terminates energizing ozone generator 180 when the corresponding time span T1 or T2 expires. In a particular embodiment, T1 is greater than T2.
At the end of the disinfection process, controller 136 de-energizes ozone generator 180 and energizes ozone conversion device 182 to complete the process. More specifically, fan 150 is energized to direct and circulate air from load compartment 142 to machinery compartment 144 through vents 152. Heater 185 and/or ultraviolet lamp 186 are activated to facilitate converting ozone to oxygen. Ozone sensor 188 detects whether ozone within compartment 120 is reduced to a selected safe or threshold level. In the exemplary embodiment, the threshold level is not greater than 0.1 parts per million (ppm), such as for example, 0.1 ppm, 0.08 ppm or 0.05 ppm. In a particular embodiment, second ozone sensor 190 is used for intermittent calibration of ozone sensor 188. Alternatively, second ozone sensor 190 is used as a backup sensor if ozone sensor 188 fails or is defective.
Lock 160 locks lid 116 in the closed position until the detected ozone is reduced to a safe level. As such, drawer 106 restricts generated ozone from exiting or escaping apparatus 100 during operation. In the exemplary embodiment wherein ozone conversion device 182 includes a catalyst material operatively coupled with a fan to facilitate converting ozone into oxygen, a suitable time-based algorithm is utilized to unlock lid 116 upon expiration of a suitable time period, such as about 2 minutes. In an alternative embodiment, upon detecting the ozone level below the threshold level, controller 136 terminates the disinfection process and de-energizes fan 150 and ozone conversion device 182. Lock 160 unlocks lid 116 in response to a signal from ozone sensor 188 indicating that the ozone level is below the threshold level. As such, the user may open lid 116 for retrieving the article(s) from compartment 120. In a further embodiment, controller 136 sets a maximum operation time and operates lock 160 to unlock when the maximum operation time expires. As such, controller 136 opens lid 116 if ozone sensor 188 fails or is defective.
In the exemplary deodorization process, controller 136 operates in a similar way as during the disinfection process. Controller 136 maintains compartment 120 in a partial vacuum condition to facilitate detecting a leakage situation. Controller 136 then energizes fan 150 and/or ozone generator 180 to direct generated ozone through the article(s). Ozone contacts and oxidizes undesired odor particles on and/or within the articles to remove the unwanted odor. Controller 136 also determines a desired ozone dosage and/or a treatment time based on an initial level of ozone, a desired deodorization level and in a load type. In one embodiment, controller 136 continuously maintains ozone at a desired level and/or introduces a selected amount of ozone into compartment 120 continuously or intermittently.
Upon termination of the deodorization process, controller 136 activates heater 185 and/or ultraviolet lamp 186 when an ozone level within compartment 120 is greater than a safe or threshold level. With the ozone level reduced to a safe level, controller 136 deactivates fan 150 and ozone conversion device 182 and lock 160 releases lid 116 from the closed position. In a particular embodiment, controller 136 operates perfumer 168 to introduce a desired or selected perfume onto the article(s).
In one embodiment, unlike apparatus 100, ozone sensors 188 and 190 (shown in
In the exemplary embodiment, the controller operates the ozone generator and/or the ozone conversion device to treat the article(s) in the disinfection process and/or the deodorization process. As such, articles, such as leather shoes and/or jackets, may be disinfected and/or deodorized in the apparatus to remove undesired odors. In addition, the lock operates in response to a level of ozone within the compartment to prevent residual ozone within the apparatus from exiting or escaping the apparatus.
While the invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.