Title of Invention: Washing apparatus and control method thereof Abstract: The present invention provides a washing apparatus and control method thereof, by which laundry can be dry-cleaned through the loaded configurations of the wet pad cloth, the filth transfer cloth, the steam providing unit, the fragrance spraying unit, and the detergent supplying unit using either the wet pad cloth or the filth transfer cloth or without using both of the wet pad cloth and the filth transfer cloth. Detailed Description: Part general_description_paragraphs: This application claims the benefit of, and is a continuation of, U.S. application Ser. No. 10/979,883 filed Nov. 3, 2004, now U.S. Pat. No. 7,600,402 which claims priority to Korean Patent Application Numbers 10-2003-0077592 filed Nov. 4, 2003, 10-2003-0077593 filed Nov. 4, 2003, 10-2003-0077594 filed Nov. 4, 2003, 10-2003-0077595 filed Nov. 4, 2003, 10-2003-0077596 filed Nov. 4, 2003, 10-2003-0077597 filed Nov. 4, 2003, 10-2003-0081084 filed Nov. 17, 2003 and 10-2003-0084085 filed Nov. 17, 2003, and each of the above-identified applications is incorporated by reference herein in its entirety. Part BACKGROUND OF THE INVENTION: 1. Field of the Invention The present invention relates to a washing apparatus, and more particularly, to a washing apparatus and control method thereof, by which laundry can be dry-cleaned. 2. Discussion of the Related Art Generally, washing apparatuses include a washing machine, a laundry dryer, and a washer/dryer. The washing machine is to perform washing on various kinds of laundries. The laundry dryer is to perform drying on a washing-completed wet laundry. And, the washer/dryer is to perform both of the washing and the drying. Yet, the washing apparatuses such as the washing machine, laundry dryer, washer/dryer, and the like carries out the general washing and/or drying on the laundry. Namely, a general washing apparatus as a home appliance is unable to perform such a special washing as dry cleaning. Recently, a separate dry-cleaning kit is provided to enable a general laundry dryer to carry out laundry dry cleaning, thereby enabling home dry cleaning. The dry-cleaning kit is provided with a wet pad cloth diffusing a prescribed amount of steam and fragrance in case of being heated, a package bag packing a prescribed amount of laundry and the wet pad cloth, a filth remover for removing filth of laundry manually, and a filth-absorbing pad. A process of carrying out dry cleaning using the dry-cleaning kit is explained as follows. First of all, the filth-absorbing pad is put beneath a filth-adhering portion of a laundry. And, the filth remover is coated on the filth-adhering portion of the laundry. In doing so, the filth adhering to the laundry migrates into the filth-absorbing pad to perform the filth removal of the laundry. Subsequently, the filth-removed laundry is put within the package bag together with the wet pad cloth. Having been sealed up, the package bag is put in a laundry dryer. The laundry dryer is then operated to provide hot air or heat to a drum. In doing so, the hot air evaporates the water and fragrance involved in the wet pad cloth within the package bag to refresh the laundry within the package bag. However, the related art laundry dry-cleaning process should be provided with the dry-cleaning kit. Namely, it is impossible for the laundry dryer itself to perform dry cleaning without the dry-cleaning kit. Moreover, the package bag configuring the dry-cleaning kit has a very small capacity enabling to hold 3˜4 suits therein for dry cleaning. Hence, the dry-cleaning kit can save a little cost for dry cleaning. And, a material forming the package bag of the dry-cleaning kit should be carefully selected. For instance, if the package back is perforated, it is unable to use the package bag. And, the material forming the package bag should be heat-resistant not to be melted at high temperature. Moreover, the wet pad cloth of the dry-cleaning kit is put in a specific area within the package bag together with the laundry, thereby being sectionally contacted with the laundry. Namely, since the position of the wet pad cloth is not changed despite the rotation of the drum, dry cleaning is carried out on a sectional portion of the laundry, where the wet pad cloth was initially inputted, only. Besides, a drum type washing machine unnecessarily wastes water in washing a small amount of laundry or a less filthy laundry. In doing so, the drum type washing machine needs the same operational time of a general washing process, thereby wasting power consumption as well. Part SUMMARY OF THE INVENTION: Accordingly, the present invention is directed to a washing apparatus and control method thereof that substantially obviate one or more problems due to limitations and disadvantages of the related art. An object of the present invention is to provide a washing apparatus and control method thereof, by which laundry can be dry-cleaned and by which dry cleaning can be simultaneously performed on a great quantity of laundry. Another object of the present invention is to provide a washing apparatus and control method thereof, by which water and power consumptions are reduced to the minimum extent. Another object of the present invention is to provide a washing apparatus and control method thereof, by which a laundry is prevented from being wetted by water provided for dry cleaning as possible as it can be. A further object of the present invention is to provide a washing apparatus and control method thereof, by which dry cleaning can be carried out on a great quantity of laundries without using a separate dry-cleaning kit. Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a washing apparatus according to the present invention includes a body forming an exterior of the washing apparatus, a drum rotatably provided within the body, and at least one or more wet pad cloths loaded within the drum to diffuse prescribed quantities of moisture and fragrance in case of receiving heat of high temperature. In another aspect of the present invention, a method of controlling a washing apparatus includes a wet pad cloth providing step of providing at least one or more wet pad cloths including prescribed amounts of moisture and fragrance with a drum and a dry-cleaning step of providing heat of high temperature to the at least one or more wet pad cloths and rotating the drum in case of a control occurrence for dry cleaning. In another aspect of the present invention, a washing apparatus includes a body forming an exterior of the washing apparatus, a drum rotatably provided within the body, and at least one steam providing unit for diffusing steam into the drum. In another aspect of the present invention, a method of controlling a washing apparatus includes a steam generating step of generating steam by heating water in a steam providing unit, a steam spray step of spraying the generated steam into a drum, and a steam discharge step of discharging the steam reaming in the drum outside the drum after completion of dry cleaning. In another aspect of the present invention, a washing apparatus includes a body forming an exterior of the washing apparatus, an outer tub provided within the body, a drum rotatably provided within the outer tub, a water supply pipe for supplying water to the outer tub, and a detergent supplying unit for spraying a dry-cleaning detergent into the drum. In another aspect of the present invention, a method of controlling a washing apparatus includes a detergent spray step of spraying a dry-cleaning detergent over a laundry inputted to a drum to separate filth from the laundry, a water spray step of spraying a small amount of water into the drum to remove the filth separated from the laundry, and a laundry drying step of providing hot and dry air to the drum to dry the laundry. In another aspect of the present invention, a washing apparatus includes a body forming an exterior of the washing apparatus, an outer tub provided within the body, a drum rotatably provided within the outer tub and having a multitude of perforated holes on a circumference, a water heater provided to a bottom part within the outer tub, and a water supply pipe connected to a portion in the vicinity of a space having the water heater provided thereto within the outer tub to guide a water supply flow of water. In another aspect of the present invention, a method of controlling a washing apparatus includes a water supply step of supplying water to a bottom space within an outer tub via a water supply pipe in case of executing an operation for dry cleaning, a temperature sensing step of sensing a temperature variation via a temperature sensor, and a heat generation control step of stopping supplying the water and driving a water heater to generate heat if a value of the sensed temperature variation exceeds a reference value. In another aspect of the present invention, a washing apparatus includes a body forming an exterior of the washing apparatus, an outer tub provided within the body, a drum rotatably provided within the outer tub and having a multitude of perforated holes on a circumference, a water heater provided to a bottom part within the outer tub, a water supply pipe for guiding a water supply flow of water, a sensing unit provided between the water heater and the drum to be short-circuited if a level of the water exceeds a predefined water level, and a controller for controlling a water supply according to whether the sensing unit is short-circuited. In another aspect of the present invention, a method of controlling a washing apparatus includes a water supply step of supplying water to a bottom space within an outer tub via a water supply pipe in case of executing an operation for dry cleaning, a short circuit check step of checking whether a short circuit of an electrode sensor occurs by the supplied water, and a heat generation control step of stopping supplying the water and driving a water heater to generate heat if short circuit of an electrode sensor occurs. In another aspect of the present invention, a washing apparatus includes a body forming an exterior of the washing apparatus, an outer tub provided within the body, a drum rotatably provided within the outer tub and having a multitude of perforated holes on a circumference, a water heater provided to a bottom part within the outer tub, a water supply pipe connected to a circumference of the bottom part of the outer tub to guide a water supply flow of water, a drying duct having one end connected to the circumference of the bottom part of the outer tub and the other end connected to an upper circumference of the outer tub to supply hot air to the outer tub, a drying heater provided within the drying duct, and a cooling water supply pipe connected to a pipe path of the drying duct to provide a small amount of cooling water. In another aspect of the present invention, a method of controlling a washing apparatus includes a water supply step of supplying water to a bottom space within an outer tub via a water supply pipe in case of executing an operation for dry cleaning, a cooling water supply step of if a level of the supplied water reaches a predefined first water level, stopping supplying the water via the water supply pipe and supplying a small amount of cooling water via a cooling water supply pipe, a water supply stop step of if the level of the supplied water reaches a predefined second water level, stopping supplying the cooling water via the cooling water supply pipe, and a steam generation step of driving a water heater to generate steam in case of completion of either the cooling water supply step or the water supply stop step. In another aspect of the present invention, a washing apparatus includes a body forming an exterior of the washing apparatus, an outer tub provided within the body, a drum rotatably provided within the outer tub and having a multitude of perforated holes on a circumference, and at least one steam providing unit for providing a prescribed amount of steam to an inside of the drum. In another aspect of the present invention, a method of controlling a washing apparatus includes a detergent spray step of spraying a dry-cleaning detergent over a laundry inputted to a drum and a steam providing step of providing steam to an inside of a drum by operating a steam providing unit. In another aspect of the present invention, a washing apparatus includes a body forming an exterior of the washing apparatus, a drum rotatably provided within the body, a steam providing unit for providing a prescribed amount of steam toward an inside of the drum, and a laundry rack detachably provided to the inside of the drum to place a laundry thereon. It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. Part DETAILED DESCRIPTION OF THE INVENTION: Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. First of all, a washing apparatus according to a first embodiment of the present invention is to collectively carry out dry cleaning on a great quantity of laundries using a wet pad cloth of a dry-cleaning kit only. In this case, the washing apparatus according to the present invention includes a general washing machine, a washer/dryer, or a laundry dryer. In the first embodiment of the present invention, the washing apparatus includes the laundry dryer for example. FIGS. 1 to 5 show a washing apparatus according to a first embodiment of the present invention. Referring to FIGS. 1 to 5, a washing apparatus according to a first embodiment of the present invention includes a body 10, a drum 20, and a wet pad cloth 60. The body 10 forms an exterior of the washing apparatus. An entrance 11 for laundry input/output is provided to a front side of the body 10. And, a rim 13 is provided to the entrance 11. The entrance 11 is open/closed by a door 15. A motor 17 for rotating the drum 20, as shown in FIG. 2, is provided to an inside bottom part of the body 10. A hot air supply pipe 31 for a hot air flow and a hot air discharge pipe 32 for discharging a hot air flowing in the drum 20 are provided within the body 10. A drying heater 33 is provided to the hot air supply pipe 31, and a blower fan 34 is provided to the hot air discharge pipe 32. The drum 20 is rotatably provided within the body 10, and an opening for the laundry input/output is provided toward the entrance 11. At least one agitation piece 21 is provided to an inner wall of the drum 20 to agitate a laundry for smooth drying. The wet pad cloth 60 is provided within the drum 20. The wet pad cloth 60 contains moisture and fragrance inside to diffuse them in case of being heated. At least one or more wet pad cloths 60 are preferably provided. Specifically, the wet pad cloth 60 is preferably formed of a material enabling various kinds of filth attached to the laundry to be smoothly transferred. Preferably, the wet pad cloth 60 is detachably provided to the agitation piece 21. For this, a loading part is provided to the agitation piece 21 to install the wet pad cloth 60. The loading part includes a loading recess 22 and a fixing holder 23. The loading recess 22 having a prescribed height is recessed from a surface of the agitation piece 21 to allow one end of the wet pad cloth 60 to be fitted therein. And, the fixing holder 23 is assembled to the loading recess 22 to fix the wet pad cloth 60 thereto and to open/close the loading recess 22. In doing so, one end of the fixing holder 23 is hinge-coupled to the loading recess 22 and a hook 24 is provided to the other end of the fixing holder 23 to be hooked in the loading recess 22. A hanging recess 25 is provided to a corresponding portion of the loading recess 22 to catch the hook 24. Alternatively, the hook may protrude from the loading recess 22 and the hanging recess can be provided to the fixing holder 23. Alternatively, hooks are provided to both ends of the fixing holder 23 and hanging recesses are formed to both sides of the loading recess 22 confronting the corresponding hooks, respectively. Alternatively, a guide 61, as shown in FIG. 4, is provided in one body to one end of the wet pad cloth 60 and a fitting recess 26 is provided to a topside of the agitation piece 21 so that the guide 61 can be fitted therein. In the configuration of the washing apparatus according to the first embodiment of the present invention, the drum 20 is hermetically sealed from an external environment so that dry cleaning can be performed within an entire inner space of the drum 20. Hence, it is able to collectively carry out dry cleaning on a great quantity of laundries. The dry cleaning means a series of cycles for refreshing the laundries. Yet, the dry cleaning may include a series of cycles for removing various kinds of filth from the laundries. Specifically, as the position of the wet pad cloth 60 is changed according to a rotation of the drum 20, the wet pad cloth 60 evenly comes into contact with the entire laundries to enhance a dry-cleaning effect. This is because the filth of the laundries can be smoothly transferred to the wet pad cloth 60 frequently coming into contact with the laundries and because the steam and fragrance can be evenly provided to the laundries overall. A process of controlling a washing apparatus according to the first embodiment of the present invention is explained as follows. First of all, if a user intends to initiate an operation of dry cleaning, the wet pad cloth 60 is loaded in the loading recess 22 of each of the agitation pieces 21 within the drum 20. In doing so, the number of the wet pad cloths 60 to be loaded preferably depends on a quantity of the laundry to be dry-cleaned. For instance, in case of intending to dry-clean 34 suits, one wet pad cloth 60 is loaded. In case of intending to dry-clean 46 suits, two wet pad cloths 60 are loaded. In case of intending to dry-clean at least six suits, three wet pad cloths 60 are loaded. Preferably, the number of the wet pad cloths 60 to be loaded depends on the quantity of the laundry. Preferably, in case of intending to load at least two wet pad cloths 60, the wet pad cloths 60 are symmetrically provided to confronting sites, top and bottom sites, or right and left sites within the drum 20 so that the steam and fragrance can be evenly diffused within the drum 20 overall. Having been loaded in the loading recesses 22 of the agitation pieces 21, the wet pad cloths 60 are fixed thereto by the fixing holders 23, respectively. Thus, the wet pad cloths 60 can be prevented from being separated from the loading recesses 22 during rotation of the drum 20, respectively. After the above-explained state has been set up, the laundry to be dry-cleaned is put in the drum 20 and the door 15 is closed. Once an operation mode for dry cleaning is selected, the drying heater 33 and the blower fan 34 are driven to supply hot air or heat to the drum 20. Namely, an external air is introduced into the body 10 via the hot air supply pipe 31 while the blower fan 34 is rotated. In doing so, the introduced air is passed through the drying heater 33 generating heat to be heated at high temperature. Hence, the heated air, i.e., hot air, is forcibly sucked into the drum 20 via the hot air supply pipe 31. In doing so, the hot air introduced in the drum 20 makes the respective wet pad cloths 60 diffuse the fragrance and steam. Specifically, as the drum 20 is being rotated, the fragrance and steam diffused from the respective wet pad cloths 60 can be evenly provided to the drum 20 overall. Hence, the laundry within the drum 20 is provided with the fragrance and steam diffused from the respective wet pad cloths 60 to be dry-cleaned. As the drum 20 is being rotated during the above process, the laundry within the drum 20 is repeatedly lifted to fall within the drum 20 by the rotation of the drum 20 and the friction with the respective agitation pieces 21. In doing so, the laundry repeating to be lifted to fall comes into contact with the wet pad cloths 60 loaded on the agitation pieces 21, whereby various kinds of filth attached to the laundry are transferred to the respective wet pad cloths 60. As the drum 20 stops operating after completion of a series of the above processes, the laundry is pulled out of the drum 20 and the used wet pad cloths 60 are unloaded from the agitation pieces 21, respectively. Thus, the dry cleaning is completed. Of course, in case of intending to keep performing dry cleaning on another laundry, new wet pad cloths 60 are loaded on the corresponding agitation pieces 21, respectively to execute a series of the aforesaid processes. Meanwhile, FIG. 5 is a projected perspective diagram of another wet cloth pad of a washing apparatus according to a first embodiment of the present invention. Referring to FIG. 5, the wet pad cloth 60 is loaded on an inner wall of the drum 20 instead of the agitation piece 21. For this, a loading part is provided to the inner wall of the drum 20 to make the wet pad cloth 60 detachable. In doing so, the loading part may include the same loading recess 22 and fixing holder 23 of the first embodiment of the present invention. Yet, considering the drum 20 is made of metal, the loading part has difficulty in forming the loading recess 22. Preferably, a guide 61 is provided in one body to one end of the wet pad cloth 60 and a receiving part 27 is provided to the inner wall of the drum 20. In doing so, the receiving part 27 is formed in a manner of protruding from two portions of the inner wall to be bent, thereby having a rail shape. Alternatively, although not shown in the drawing, a portion of the inner wall of the drum 20 is concavely bent to form a rail type receiving part 27. FIG. 6 is a front diagram of an interior of a washing apparatus according to a second embodiment of the present invention. A second embodiment of the present invention includes the elements of the first embodiment of the present invention and further includes a separate fragrance spraying unit 70. The fragrance spraying unit 70 enables to additionally provide fragrance for dry cleaning to the drum 20. Even if the fragrance is diffused from the wet pad cloth 60, the diffused fragrance from the wet pad cloth 60 fails to be evenly diffused into the laundry overall but is discharged outside via the hot air discharge pipe 32. Hence, fragrance shortage takes place. Hence, the fragrance spraying unit 70 is preferably provided in addition. The fragrance spraying unit 70 includes a fragrance storage box 71 for storing fragrance therein and a nozzle type fragrance spray part 72 for spraying the fragrance stored in the fragrance storage box 71 into the drum 20. The fragrance spray part 72 may be connected to a pump or the like to forcibly jet the fragrance stored in the fragrance storage box 71 into the drum 20. Instead, the fragrance spray part 72, as shown in FIG. 6, employs a simple valve configuration to spray the fragrance by turning on/off a pipe. Hence, a user's satisfaction for the dry cleaning is enhanced since a prescribed amount of the fragrance is additionally provided to the drum 20 from the fragrance spraying unit 70 during the operation of the dry cleaning. FIG. 7 and FIG. 8 schematically show an interior of a washing apparatus according to a third embodiment of the present invention. A third embodiment of the present invention includes the elements of the first embodiment of the present invention and further includes a separate steam providing unit 80. Even if the steam is diffused from the wet pad cloth 60, the diffused steam from the wet pad cloth 60 fails to be evenly diffused into the laundry overall but is discharged outside via the hot air discharge pipe 32. Hence, steam shortage takes place. Hence, the steam providing unit 80 is preferably provided in addition. The steam providing unit 80 includes a water storage part 81 for storing a prescribed amount of water therein, a heating part for generating steam by evaporating the water stored in the water storage part 81, and a nozzle type steam spray part 83 for spraying the generated steam into the drum 20. The heating part 82 is a heater for generating heat by electricity impression. Alternatively, the drying heater 33 can be used as the heating part 82. The heating part 82, as shown in FIG. 7, can have a configuration enabling to evaporate water flowing in a steam supply pipe 84 connecting the water storage part 81 and the steam spray part 83 by heating a portion of the steam supply part 84. Alternatively, the heating part 82, as shown in FIG. 8, can be provided within the water storage part 81. In this case, the heating part 82 may be a coil or sheath heater. The steam spray part 83 can be connected to a pump or the like to enable the steam, which is generated from evaporating the water flowing through the steam supply pipe 84, to be forcibly sprayed into the drum 20. Alternatively, the steam spray part 83 can employ a simple valve configuration to spray the steam by turning on/off a pipe as well. Hence, a user's satisfaction for the dry cleaning is enhanced since a prescribed amount of the steam is additionally provided to the drum 20 from the steam providing unit 80 during the operation of the dry cleaning. Meanwhile, if the washing apparatus is configured to enable the separate steam or fragrance supply like the second or third embodiment of the present invention, the wet pad cloths containing the steam and fragrance therein are unnecessary. Yet, for the smooth dry cleaning of the laundry, a separate configuration enabling to remove the filth of the laundry is needed. A washing apparatus according to a fourth embodiment of the present invention is characterized in carrying out dry cleaning smoothly without using a wet pad cloth. This is explained with reference to FIGS. 9 to 12 as follows. In doing so, the same reference numbers will be used throughout the drawings to refer to the same or like configurations of the first to third embodiments of the present invention. First of all, a washing apparatus according to a fourth embodiment of the present invention includes a body 10, a drum 20, and a steam providing unit 80. The body 10 forms an exterior of the washing apparatus. An entrance 11 is provided to a front side of the body 10. And, the entrance 1 is open/closed by a door 15. A rim 13 is provided to an inner circumference of the entrance 11 to seal up the door 15 and the entrance 11. The drum 20 is rotatably provided within the body 10. The steam providing unit 80 is configured to diffuse a prescribed amount of steam into the drum 20 for dry cleaning. And, at least one or more steam providing units 80 are provided. The steam providing unit 80 includes a heating part 82 for generating steam from evaporating water by heat at high temperature, a steam supply pipe 84 for a flow of the steam, a steam spray part 83 for diffusing the steam flowing via the steam supply pipe 84 into the drum 20, and a water storage part 81 for storing a prescribed amount of water therein for generation of the steam. The steam spray part 83 has a nozzle shape to enable smooth spray of the steam, and a steam outlet is provided within the drum 20. Preferably, the steam outlet of the steam spray part 83, as shown in FIG. 9, is perforated into the rim 13 to be exposed to an inside of the drum 20. The water storage part 81 is connected to a water supply valve 17 connected to a service pipe or the like to enable automatic water supply from outside. The heating part 82 constructing the steam providing unit 80 may include a coil heater enclosing the steam supply pipe 84. Alternatively, the heating part 82, as shown in FIG. 8, is preferably provided within the water storage part 81. Moreover, the heating part 82 preferably includes a sheath heater enabling to directly heat the water stored in the water storage part 81 for steam generation. In case of providing the heating part 82 within the water storage part 81, it is preferable that the steam providing unit 80 further includes a water level sensor 85 for sensing a level of the water stored in the water storage part 81. If the amount of the water stored in the water storage part 81 is insufficient, the heating part 82 may excessively generate the heat. If the amount of the water stored in the water storage part 81 is excessively sufficient, it takes a long time to evaporate the water for the steam generation. Hence, the water level sensor 85 enables to maintain a uniform level of the water stored in the water storage part 81. In this case, the uniform level is enough for the smooth steam generation. Namely, if the water level measured by the water level sensor 85 is higher than a reference value, water supply to the water storage part 81 is cut off. If the water level measured by the water level sensor 85 is lower than the reference value, supplementary water supply to the water storage part 81 is enabled. Preferably, the washing apparatus according to the fourth embodiment of the present invention, as shown in FIG. 10, further includes a detergent supplying unit 90 to enhance the dry cleaning effect. Of course, the detergent supplying unit 90 is skippable. Yet, efficiency of dry cleaning without using a detergent is too low. Hence, it is preferable that the detergent supplying unit 90 is further included to supply the detergent to the drum 20. In doing so, the detergent is a solvent mixed with a petroleum solvent. Preferably, fragrance is further added to the detergent to be given to the laundry to be dry-cleaned. Namely, the dry cleaning not only refreshes the laundry but also provides the fragrance to the laundry, thereby enhancing user's satisfaction. The detergent supplying unit 90 includes a detergent storage box 91 for storing the dry-cleaning detergent therein. The detergent storage box 91 is provided within the body to enable detergent supplement. And, the detergent supplying unit 90 includes a detergent spray part 93 for spraying the detergent stored in the detergent storage box 91 into the drum 20. Preferably, a detergent outlet of the detergent spray part 93 is perforated into the rim 13 to be exposed to the inside of the drum 20 together with the steam spray part 83. The detergent spray part 93 can be connected to a pump or the like to enable to forcibly spray the detergent into the drum 20. Alternatively, the detergent spray part 93, as shown in the drawing, can employ a simple valve configuration to spray the detergent by turning on/off a pipe as well. Instead, the detergent provided via the detergent supplying unit 90 may include not the petroleum based solvent but the fragrance only. Namely, although not shown in the drawing, at least one fragrance spraying unit 70 for providing the fragrance may be provided to the washing apparatus of the present invention instead of the detergent supplying unit 90. Besides, although not shown in the drawing, the detergent supplying unit 90 and the fragrance spraying unit 70 can be separately provided to the washing apparatus of the present invention. Preferably, the washing apparatus according to the fourth embodiment of the present invention, as shown in FIG. 10 and FIG. 11, further includes a filth transfer cloth 50. In this case, filth attached to the laundry to be dry-cleaned is transferred to the filth transfer cloth 50 to be removed from the laundry. Preferably, the filth transfer cloth 50 is formed of a fabric material more efficient in transferring the filth thereto than the laundry. Specifically, the filth transfer cloth 50 may be inputted to the drum 20 operated for dry cleaning. Preferably, the filth transfer cloth 50 is detachably provided within the drum 20. Namely, in case of being simply put in the drum 20, the filth transfer cloth 50 is raveled with the laundry in the course of the dry cleaning to play a role in transferring the filth out of a specific portion of the laundry only. Hence, in order to enable the filth transfer cloth 50 to come into contact with more portions of the laundry, it is preferable that the filth transfer cloth 50 and the laundry are separately moved. Accordingly, the present invention is characterized in that the filth transfer cloth 50 is assembled to an inside of the drum 20. In doing so, the filth transfer cloth 50, as proposed in the present embodiment, is loaded on the agitation piece 21 for smooth agitation of the laundry. Alternatively, the filth transfer cloth 50 can be loaded on the inner wall of the drum 20. A method of controlling a washing apparatus according to the fourth embodiment of the present invention is explained with reference to a flowchart in FIG. 12 as follows. First of all, a controller (not shown in the drawing) controlling an operation of a laundry dryer keeps checking a presence or non-presence of a request for a dry-cleaning operation (S11). Namely, when an operation control of the laundry dryer is requested by a user, the controller decides whether the operation selected by the user is for the dry cleaning or a general laundry drying. Hence, the controller detects the presence of the request for dry cleaning. In doing so, in case of the presence of the request for the dry-cleaning operation, the controller requests an input of the laundry to be dry-cleaned. In such a case, the user inputs the laundry to be dry-cleaned to the drum 20, closes the door 15, and then selects a continuous execution of the dry-cleaning operation. Preferably, in the course of inputting the laundry by the user, at least one or more filth transfer cloths 50 are loaded on the agitation pieces 21 within the drum 20, respectively. Alternatively, after completion of loading the filth transfer cloth 50 and inputting the laundry, the user may request the dry-cleaning operation so that the controller can immediately control the various elements for the dry-cleaning operation. Subsequently, once the dry cleaning is ready to be executed by a series of the aforesaid procedures, the drum is rotated (S13) and the detergent supplying unit 90 is controlled to supply the detergent stored in the detergent storage box 91 to the drum 20 (S13). In doing so, as the detergent is evenly sprayed into the drum 20 overall by the detergent spray part 93, various kinds of filth are separated from the laundry by the detergent. It can be controlled that the detergent keeps being sprayed during the execution of the dry-cleaning operation. And, it can be also controlled that the detergent stops being sprayed in case of starting to provide the steam within the drum 20. After completion of supplying the detergent, water is supplied to the water storage part 81 and power is applied to the heating part 82 to evaporate the water. Hence, the steam is generated (S14). In doing so, the water level sensor 85 and the water supply valve 17 closing/opening the water supply pipe, i.e., service pipe, interoperate with the controller to maintain a constant level of the water stored within the water storage part 81. For instance, if the water level sensed by the water level sensor 85 is lower than a reference water level, the water supply valve is turned on to enable the corresponding water supply. And, the steam generated from the above process flows via the steam supply pipe 84 to be supplied to the drum 20 via the steam spray part 83. Hence, the steam having been supplied to the drum 20 activates the detergent involved in the laundry to separate the filth from the laundry, whereby the laundry is refreshed. In doing so, the fragrance included in the detergent adsorbs to the laundry to remove odors of the laundry and solvent. In the course of performing the above process, since the drum 20 is being rotated by the driven motor 17 to keep agitating the laundry within the drum 20, the filth transfer cloth 50 is moved by the rotation of the drum 20 to have the filth, which was separated from the laundry, transferred thereto as well as the overall laundry can be evenly refreshed Hence, it is able to prevent the laundry from being contaminated again by the filth separated from the laundry. After completion of the dry cleaning through a series of the aforesaid processes, the controller turns off the water supply valve 17 as well as cuts off the power supplied to the heating part 82 (S16). In doing so, the steam remaining within the drum 20 is discharged outside the drum 20 to protect the user from danger such as a burn caused by the high-temperature steam, which can be done by driving the blower fan 34. Namely, the blower fan 34 is driven to rotate so that the steam within the drum 20 can be discharged outside the body 10 via the hot air discharge pipe 32. In doing so, it is preferable to control the drying heater 33 not to generate heat. Yet, the dry-cleaned laundry can be dried by generating heat from the drying heater 33. Once the drum 20 stops operating after completion of a series of the aforesaid processes, the laundry is pulled out and the used filth transfer cloths 50 are detached from the drum 20. Thus, the dry cleaning is completed. Of course, in case of intending to keep performing dry cleaning on another laundry, new filth transfer cloths 50 are loaded in the drum 20, respectively to execute a series of the aforesaid processes. Meanwhile, the washing apparatus according to the fourth embodiment of the present invention is applicable to other kinds of apparatuses as well as the laundry dryer. Namely, the washing apparatus according to the fourth embodiment of the present invention is applicable to a washer/dryer, a general drum type washing machine, and the like. A fifth embodiment of the present invention is characterized in applying the configuration of the fourth embodiment of the present invention to a dryer/washer. This is explained in detail with reference to FIG. 13 and FIG. 14 as follows. First of all, a washing apparatus according to a fifth embodiment of the present invention includes a body 110, an outer tub 120, a drum 130, a waster supply pipe 112, and a detergent supplying unit 190. The body 110 forms an exterior of a washer/dryer. An entrance 111 is provided to a front side of the body 110. And, the entrance 111 is open/closed by a door 115. A rim 113 is provided to an inner circumference of the entrance 111 for seal-up between the door 115 and the entrance 111. Within the body 110, provided are the outer tub 120 and a drying unit providing heated air to an inside of the outer tub 120. The drying unit includes a drying duct 141, a drying heater 143 provided to a pipe of the drying duct 141, and a blower fan 144 for forcible air circulation. An air inlet of the drying duct 141 is connected to a lateral side of the outer tub 120 and an air outlet of the drying duct 141 is connected to a topside of the outer tub 120. The drum 130 is rotatably provided within the outer tub 120. The water supply pipe 112 is configured to supply water to the outer tub 120. One end of the water supply pipe 112 is exposed outside the body 110 to be connected to a service pipe (not shown in the drawing). In this case, it is preferable that a detergent box 119 storing various detergents necessary for washing is provided to the pipe path of the water supply pipe 112. And, the detergent supplying unit 190 is configured to spray a dry-cleaning detergent into the drum 130. The detergent supplying unit 190 includes a detergent storage box 191 for storing the dry-cleaning detergent therein and a detergent spray part 193 for spraying the detergent stored in the detergent storage box 191 in a vaporized state. Preferably, a detergent outlet of the detergent spray part 193 is perforated into the rim 113 to be exposed to the inside of the drum 130. The detergent spray part 193 can be connected to a pump or the like to enable to forcibly spray the detergent stored in the detergent storage box 191 into the drum 130. Preferably, the detergent spray part 193, as shown in the drawing, can employ a simple valve configuration to optionally spray the detergent via a separate valve 194. Besides, the detergent storage box 191 and the detergent box 119 provided to the pipe path of the water supply pipe 112 can be separately provided. Alternatively, it is preferable that they are formed in one body to enhance efficiency of an overall installation space. And, the detergent stored in the detergent storage box 191 includes a solvent mixed with a petroleum solvent. Preferably, fragrance is further added to the detergent to be given to the laundry. Preferably, the washing apparatus according to the fifth embodiment of the present invention further includes a water heater 160. The water heater 160 is provided to a bottom part within the outer tub 120 to generate steam by heating water. A method of controlling a washing apparatus according to the fifth embodiment of the present invention is explained with reference to a flowchart in FIG. 15 as follows. First of all, once a request for an operation of dry cleaning occurs, an input of the laundry to be dry-cleaned is requested. After completion of inputting the laundry, a dry-cleaning operation starts. Of course, it can be set up that the request for the dry-cleaning operation is made after completion of inputting the laundry. Once the dry cleaning is executed, the detergent supplying unit 190 sprays the dry-cleaning detergent onto the laundry inputted to the drum 130. Preferably, an amount of the detergent sprayed into the drum 130 is set up not to soak the laundry therein. Preferably, by controlling the drum 130 to rotate on spraying the dry-cleaning detergent, the dry-cleaning detergent is evenly coated on the laundry overall. In doing so, the drum 130 may keep being rotated in one rotational direction. Preferably, it is controlled to alternately repeat to rotate the drum 130, clockwise and counter clockwise. And, various kinds of filth are separated from the laundry by chemical reaction of the dry-cleaning detergent coated on the laundry. During the above process, the water heater 160 generates heat. Accordingly, the water collected in the bottom part of the outer tub 120 is evaporated to generate the steam within the drum 130. In doing so, it is preferable that the water remains in a state of being supplied prior to inputting the laundry to the drum 130. Preferably, the water was supplied at the water level not to flood the bottom part of the drum 130. The above-generated steam activates the detergent infiltrated into the laundry to enable smooth separation of the filth. Of course, it is preferable that a time sufficient for enabling the smooth separation of the filth from the laundry is provided after completion of the dry-cleaning detergent spray and the steam supply. After completion of a series of the aforesaid processes, water is injected into the drum 130 via the water supply pipe 112 to remove the filth separated from the laundry. This is to prevent the filth, which was separated from the laundry, from contaminating the laundry again. In doing so, an amount of the water injected into the drum 130 is preferably set small not to soak the laundry. After completion of the above process, power is supplied to the drying heater 143 and the blower fan 144 is driven, whereby hot drying air is supplied to the drum 130 via the drying duct 141 to dry the laundry. After completion of drying the laundry, the operation for the dry-cleaning mode is terminated. Meanwhile, since the above-explained washing apparatus according to the fifth embodiment of the present invention generated the steam by evaporating the water supplied to the bottom part within the outer tub 120, the level of the water should be maintained constant. If the level of the water is excessively high, it is not preferable that the laundry within the drum 130 is soaked. If the level of the water is too low, it is difficult to generate the steam. To overcome such problems, a configuration and control method for maintaining a constant level of the water supplied to the bottom part of the outer tub are provided by embodiments of the present invention, which are explained with reference to FIGS. 16 to 19 as follows. First of all, a washing apparatus according to a sixth embodiment of the present invention includes a body 210, an outer tub 220, a drum 230, a water heater 260, and a water supply pipe 212. The body 210 forms an exterior of the washing apparatus. An entrance 211 is provided to a front side of the body 210. And, the entrance 211 is open/closed by a door 215. The outer tub 220 is provided within the body 210, and the drum 230 is rotatably provided within the outer tub 220. A multitude of perforated holes 231 are formed in a circumference of the drum 230 to allow water and steam to flow into the drum 230. The water heater 260 is provided to a bottom part within the outer tub 220 to heat the water supplied to the outer tub 220. In doing so, a part (herein after called loading part) 221, where the water heater 260 is loaded, is provided by a concave portion of the outer tub 220 and is connected to a drainpipe 223 for draining the water after completion of washing. And, a drain valve 225 is provided to the drainpipe 223. Specifically, the water heater 260 enables steam generation as well as operates to heat the water. Namely, in the embodiment of the present invention, the steam for refreshing the laundry is generated using the water heater 260 instead of using a separate steam generator. The water supply pipe 212 is a pipe path through which the water flows. The water supply pipe 212 guides to supply the water provided from the service pipe or the like via the water supply valve 217 to an inside of the outer tub 220. In this case, a detergent box 219 for storing a detergent is provided to the pipe path of the water supply pipe 212 so that the detergent can be included in the water flowing into the outer tub 220. The detergent box 219 is provided to
{'bibliographic_information': "{'country': 'US', 'doc-number': '12585112', 'kind': 'B2', 'date': '20090903', 'invention_title': 'Washing apparatus and control method thereof'}", 'source_file': './grant/2012/ipg120228.xml', 'source_data': 'USPTO-Grant'}