Abstract:
Provided are a fabric dryer and a method of controlling the fabric dryer. The fabric dryer includes a drum, a driving unit, a steam supply unit, a radical supply unit, a contamination removal function selector, and a controller. The drum is rotatably disposed and receives laundry. The driver rotates the drum. The steam supply unit supplies steam into the drum. The radical supply unit supplies radical into the drum. The contamination removal function selector selects a water-soluble contaminant or a fat-soluble contaminant. The controller controls the steam supply unit to supply steam in response to selection of the water-soluble-contaminant by the contamination removal function selector, and controls the radical supply unit to supply radical in response to selection of fat-soluble contaminant by the contamination removal function selector.

Description:
This application claims priority to Korean Patent application no. 10-2011-0108754 filed Oct. 24, 2011, which is hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a fabric dryer and a method of controlling the fabric dryer. 
     2. Description of the Related Art 
     Generally, a fabric dryer is an apparatus that dries wet clothes, bedclothes, etc. (hereinafter, referred to as ‘laundry’). The fabric dryer includes a drum receiving laundry and a motor for driving the drum, and a heater for supplying hot air into the drum. The fabric dryer supplies dry hot air heated by the heater into the drum holding laundry and rotates the drum to dry laundry. 
     Since a typical fabric dryer is configured to dry only wet laundry, when spots or other contaminants are found in wet laundry to be dried, a washing machine needs to be separately driven to remove the spots and the contaminants. Also, when the quantity of laundry having spots or other contaminants is small, it is inefficient to separately drive the washing machine to remove the spots or other contaminants in terms of time and cost. 
     SUMMARY OF THE INVENTION 
     Thus, an object of the present invention is to provide a fabric dryer and a method of controlling the fabric dryer, which can remove contaminants from laundry without operating a separate washing machine. 
     According to an aspect of the present invention, there is provided a fabric dryer including: a drum rotatably disposed and receiving laundry; a driving unit rotating the drum; a steam supply unit supplying steam into the drum; a radical supply unit for supplying radical into the drum; a contamination removal function selector for selecting a water-soluble contaminant or a fat-soluble contaminant; and a controller configured to control the steam supply unit to supply steam in response to selection of the water-soluble-contaminant by the contamination removal function selector, and control the radical supply unit to supply radical in response to selection of fat-soluble contaminant by the contamination removal function selector. 
     According to another aspect of the present invention, there is provided a method of controlling a fabric dryer, including: selecting a water-soluble contaminant or a fat-soluble contaminant through a contamination removal function selector; and removing the contaminant from laundry in a drum according to the selected contaminant, wherein steam is supplied into the drum when the selected contaminant is water-soluble, and radical is supplied into the drum when the selected contaminant is fat-soluble. 
     The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. 
       In the drawings: 
         FIG. 1  is a perspective view illustrating a fabric dryer according to an embodiment of the present invention; 
         FIG. 2  is a view illustrating a control panel of  FIG. 1 ; 
         FIG. 3  is a view illustrating a main configuration of a fabric dryer according to an embodiment of the present invention; 
         FIG. 4  is a flowchart illustrating a method of controlling a fabric dryer according to an embodiment of the present invention; 
         FIG. 5  is a view illustrating a control panel according to another embodiment of the present invention; and 
         FIG. 6  is a view illustrating a main configuration of a fabric dryer according to another embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like components. 
     Hereinafter, exemplary embodiments of a fabric dryer according will be described in detail with reference to the accompanying drawings. 
       FIG. 1  is a perspective view illustrating a fabric dryer according to an embodiment of the present invention.  FIG. 2  is a view illustrating a control panel of  FIG. 1 .  FIG. 3  is a view illustrating a main configuration of a fabric dryer according to an embodiment of the present invention. 
     Referring to  FIG. 1 , the fabric dryer may include a cabinet  2  defining the exterior, a top cover  4  for covering the upper side of the cabinet  2 , and a control panel  10  disposed at a front upper side of the cabinet  2 . 
     A drum  8  may be rotatably disposed in the cabinet  2  to hold laundry. Also, a motor (not shown) for driving the drum  8  and a hot air supply unit  80  for supplying hot air or cool air into the drum  8  may be disposed in the cabinet  2 . 
     The hot air supply unit  80  may include a heater (not shown) and a blowing fan (not shown) for blowing air heated by the heater into the drum  8 . 
     A steam supply unit  60  may be disposed in the cabinet  2  to supply steam into the drum  8 . The steam supply unit  60  may supply steam generated by heating water into the drum  8 . 
     Also, a radical supply unit  70  may be disposed in the cabinet  2  to generate radical into the drum  8 . The radical supply unit  70  may include an air pumping unit (not shown), an ozone generating unit (not shown), and a molecular conversion unit (not shown). The air pumping unit (not shown) may supply air for generating ozone to the ozone generating unit, and the ozone generating unit (not shown) may generate ozone by applying a high voltage to supplied air or irradiating ultraviolet rays. The molecular conversion unit may react supplied ozone with a radical conversion catalyst to generate OH radical. The generated radical can sterilize bacteria or virus living in water or clothes through a strong and rapid oxidation process. 
     Referring to  FIG. 2 , the control panel  10  may include a plurality of drying operation input unit  20  manipulated to select a dry operation condition and a contamination removal function selecting unit  40  for removing predetermined contaminants. 
     The plurality of drying operation input unit  20  may include a course selection dial  21  for selecting drying courses that are programmed and a plurality of selection buttons  22  for selecting detail drying operation condition other than the drying course. The plurality of selection buttons  22  may include a dry level button for selecting the degree of the drying, a temperature control button for selecting the temperature of hot air supplied upon drying, a drying time selection button for selecting the drying time, and a beep sound selection button for selecting a beep alarming a user. 
     Also, the control panel  10  may include a power button  12  and a pause button  14  for resuming the operation of each course or pausing the operation of each course 
     Also, the control panel  10  may include a display unit  30  for displaying the input conditions or the operation state of the fabric dryer. 
     The contamination removal function selecting unit  40  may be disposed at one side of the control panel  10  separately from the drying operation input unit  20 . The contamination removal function selecting unit  40  may include a plurality of contamination selecting units  43  and  44  such that a user can select one from predetermined contaminants. In this embodiment, the predetermined contaminants may include water-soluble contaminants, fat-soluble contaminants such as sebum, liquid contaminants, solid contaminants such as dust and soil. 
     The contamination removal function selecting unit  40  may be configured to select one from the plurality of contamination selecting units  43  and  44  according to the push number of one pushable button or the rotation angle of a rotatable dial. Alternatively, the plurality of contamination selection units  43  and  44  may include a corresponding button, respectively. When buttons are provided to the plurality of contamination selecting units  43  and  44 , respectively, two or more buttons can be selected. 
     The contamination removal function selecting unit  40  may include a contamination removal function selecting button  42  that is a push-type button. The plurality of contamination selecting units  43  and  44  may be selected according to the push number of the contamination removal function selecting button  42 . For example, when the contamination removal function selecting unit  40  is pushed once, the water-soluble contamination selecting unit  43  may be selected, and when the contamination removal function selecting unit  40  is pushed twice, the fat-soluble contamination selecting unit  44  may be selected. 
     Referring to  FIGS. 2 and 3 , the plurality of contamination selecting units  43  and  44  may include the water-soluble contamination selecting unit  43  for removing water-soluble contaminants and the fat-soluble contamination selecting unit  44  for removing fat-soluble contaminants. In this embodiment, the plurality of contamination selecting units  43  and  44  are described as being divided into two kinds, but embodiments are not limited thereto. For example, the plurality of contamination selecting units may be divided into more kinds according to the kinds of contaminants, and may also be configured to select a combination of two or more contaminants. 
     The plurality of contamination selecting units may include entries corresponding to each contaminant and indicating lamps for indicating whether or the entries are selected. For example, when the contamination removal function selecting button  42  is pushed once, the water-soluble contamination selecting unit  43  may be selected and the indicating lamp corresponding to the water-soluble contamination selecting unit  43  may be lighted. Referring to  FIG. 2 , although in the control panel  10 , the plurality of contamination selecting units are written in English, embodiments are not limited thereto. For example, the plurality of contamination selecting units may be written in other languages or symbols. 
     The fabric dryer may include a controller  50  for controlling the operation of the fabric dryer according to signals inputted into the control panel  10 . 
     When the drying operation input unit  20  and the contamination removal function selecting unit  40  are both selected, the controller  50  may control to perform the drying operation after a contamination removing course for removing contaminants. 
     The controller  50  may control the operation of the driving unit  9 , the steam supply unit  60  and the radical supply unit  70  according to signals inputted into the drying operation input unit  20  and the contamination removal function selecting unit  40 . 
     When the water-soluble contamination selecting unit  43  is selected, the controller  50  may control the operation of the steam supply unit  60  to supply steam to laundry in the drum  8 . 
     When the fat-soluble contamination selecting unit  44  is selected, the controller  50  may control the operation of the radical supply unit  70  to supply radical to laundry in the drum  8 . 
       FIG. 4  is a flowchart illustrating a method of controlling a fabric dryer according to an embodiment of the present invention. Hereinafter, the operation of the fabric dryer will be described with reference to  FIG. 4 . 
     When a user intends to use the fabric dryer, the user may push the power button  12 , and then input a desired drying course using the course selecting dial  21 , or may input a desired drying operation condition using the plurality of selection buttons  22 . 
     When power is applied through the power button  12 , the controller  50  may check whether the contamination removal function is selected (S 1 ). 
     When a user finds contaminants from laundry during the drying of laundry or intends to remove contaminants of laundry using a fabric dryer instead of a separate washing machine, the user may use the contamination removal function of the fabric dryer. 
     When a user intends to use the contamination removal function of the fabric dryer, the user may manipulates the contamination removal function selecting button  42 . As described above, since the contamination removal function selecting button  42  is a push-type button, a user may push the contamination removal function selecting button  42 . 
     When a user pushes the contamination removal function selecting button  42 , a push signal may be inputted into the controller  50 . Then, the controller  50  may determine that the contamination removal function has been selected. 
     When the controller  50  determines that the contamination removal function has been selected, the controller  50  may determine whether or not the kind of contaminants is selected (S 2  and S 4 ). That is, after the contamination removal function selecting butting  42  is pushed, the controller  50  may wait such that the kind of contaminant can be selected within a predetermined duration. 
     When the controller  50  determines that the water-soluble contamination selecting unit  43  has been selected (S 2 ), the controller  50  may operate the steam supply unit  60  to supply steam to laundry in the drum  8 . As described above, while steam is being supplied to laundry in the drum  8 , the controller  50  may control the operation of the driving unit  9  to rotate the drum  8 . Also, the controller  50  may operate the hot air supply unit  80  to increase the temperature of laundry wetted by steam. As the temperature of wet laundry increases, the degradation of contaminants by water may be facilitated. Particularly, a user can process laundry with detergent, and then load laundry into the drum  8 . In this case, the activity of detergent can be improved through the hot air supply process, and thus the washing performance can be improved. 
     When the controller  50  determines that the fat-soluble contamination selecting unit  44  has been selected (S 4 ), the controller  50  may operate the radical supply unit  70  to supply radical to laundry in the drum  8  (S 5 ). Since fat-soluble contaminants such as sebum are difficult to remove, radical having good washing efficiency may be used to remove the contaminants. As described above, while radical is being supplied to laundry in the drum  8 , the controller  50  may control the operation of the driving unit  9  to rotate the drum  8 . 
     After the contamination removing course is completed, the controller  50  may perform a drying cycle according to conditions preset through the control panel  10  (S 6 ). 
     In this embodiment, since contaminants can be removed from the fabric dryer without operating a separate washing machine, convenience for use can be improved. 
       FIG. 5  is a view illustrating a control panel according to another embodiment of the present invention.  FIG. 6  is a view illustrating a main configuration of a fabric dryer according to another embodiment of the present invention. 
     Referring to  FIGS. 5 and 6 , a control panel  80  according to this embodiment may differ from the control panel  10  according to the previous embodiment in that the control panel  80  includes a plurality of course selecting units  121 ,  122  and  123 , but other configurations and operations are similar to those of the previous embodiment, and thus a detail description thereof will be omitted below. 
     The plurality of course selecting units  121 ,  122  and  123  may include a tumble course selecting unit  121  for tumbling laundry in a drum  8  by driving a driving unit  9 , a steam course selecting unit  122  for generating steam into the drum  8  by operating a steam supply unit  60 , and a radical course selecting unit  123  for generating radical into the drum  8 . 
     When one of the plurality of course selecting units  121 ,  122  and  123  is selected, the selected contamination removing course may proceed. 
     When the tumble course selecting unit  121  is selected, a controller  50  may control the operation of the driving unit  9  to tumble laundry in the drum  8 . 
     When the steam course selecting unit  122  is selected, the controller  50  may control the operation of the steam supply unit  60  to supply steam to laundry in the drum  8 . 
     When the radical course selecting unit  123  is selected, the controller  50  may control the operation of a radical supply unit  70  to supply radical to laundry in the drum  8 . 
     Although the preferred embodiments of the invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.