Patent Description:
In general, a front-loading washing machine has a smaller size and a larger washing capacity than a top-loading washing machine. In addition, because the front-loading washing machine has high washing performance and does not cause a tangle of laundry, the front-loading washing machine is currently and widely used.

In addition, recently, the front-loading type drying machine is widely used. Like the front-loading washing machine, the front-loading drying machine is configured such that washed laundry to be dried is loaded into the front-loading type drying machine through a front portion of the front-loading type drying machine. Therefore, the drying machine has similar advantages to the front-loading type washing machine.

Most of the home and laundry use the washing machine and the drying machine together. The washing machine and the drying machine may be used while being disposed side by side in a lateral direction. In this case, the washing machine and the drying machine unnecessarily occupy a large area. As illustrated in <FIG>, a drying machine D is stacked on a washing machine W to minimize an installation area.

However, even in this case, it is difficult to install the washing machine and the drying machine in the interior space with a low height. Therefore, studies are being conducted to integrate the washing machine and the drying machine to reduce a total installation height.

Further, the drying machine adopts a technology that uses a heat pump to produce a hot air to reduce energy consumption.

More specifically, high-temperature air discharged from a drying drum is cooled and condensed while exchanging heat with an evaporator, and the hot air is produced as air to be supplied to the drying drum exchanges heat with a condenser. The use of the heat pump may allow the amount of heat, which was discarded during the discharging and condensing process, to be used to produce the hot air, which makes it possible to reduce energy consumption to that extent.

However, the air, which passes through the evaporator and the condenser as described above, comes into contact with clothes, which are drying targets, and then is discharged. For this reason, the air contains a large amount of lint separated from surfaces of the clothes during the drying process. To remove the lint, a lint removing filter is installed in a discharge flow path for the hot air and disposed at a position before the hot air is introduced into the evaporator. The lint removing filter prevents, to some extent, the lint from being discharged to the outside or introduced into the evaporator.

However, the lint removing filter needs to have small meshes to improve the performance in removing the lint. For this reason, there is a problem in that resistance of a flow path increases, and discharge efficiency deteriorates, which results in a limitation in reducing sizes of the meshes.

For this reason, some of the lint is introduced into the heat pump while passing through the lint removing filter, and the introduced lint is attached to a surface of the condenser, which causes deterioration in heat exchange efficiency and increases air flow resistance.

To solve the problem, in the related art, various attempts have been made to remove the lint accumulated on the surface of the condenser. For example, a drying machine has been proposed, which sprays condensate water produced in the evaporator to a surface of a condenser to remove lint. However, because the amount of condensate water is not always sufficiently supplied, there is a problem in that it is impossible to remove the lint when the amount of available condensate water.

<CIT>) relates to an integrated laundry washer-dryer, and a control method therefor.

<CIT>) relates to a clothes washing and drying integrated machine which comprises a shell, a clothes washing device and a clothes drying device.

<CIT>) relates to a clothes dryer that dries objects to be dried, such as clothes, and a method for cleaning an evaporator of the clothes dryer.

The present invention has been made in an effort to solve the above-mentioned problems, and an object of the present invention is to provide an integrated washing-drying machine, in which a drying drum and a washing drum are disposed in a single housing to minimize a height of a product, and a washing water to be supplied to the washing drum may be used to clean a condenser when the amount of condensate water is insufficient, and a method of controlling the same.

To achieve the above-mentioned object, the present invention provides an integrated washing-drying machine including: a housing; a drying drum disposed at an upper side in the housing and configured to accommodate and dry laundry; a washing drum disposed at a lower side in the housing and configured to accommodate and wash laundry; a heat pump having an evaporator, a compressor, and a condenser and produce hot air for drying laundry and supply the hot air to the drying drum; and a cleaning means configured to clean the condenser by spraying cleaning water to the condenser.

In this case, the cleaning means uses, as the cleaning water, at least any one of condensate water produced in the evaporator and washing water to be supplied to the washing drum. That is, even though the amount of condensate water is insufficient, the condenser may be cleaned cleanly by using the washing water as the cleaning water.

More specifically, the cleaning means includes: a cleaning nozzle configured to spray the cleaning water to the condenser; a condensate water supply unit including a condensate water storage tank configured to store the condensate water produced in the evaporator, and a pump configured to supply the condensate water stored in the condensate water storage tank to the cleaning nozzle; a washing water supply unit including a washing water supply flow path branching off from a washing machine water supply unit, connected to the cleaning nozzle, and configured to supply the washing water, and a washing water supply valve configured to open or close the washing water supply flow path; and a control unit configured to control the pump and the washing water supply valve so that at least any one of the condensate water and the washing water is supplied to the cleaning nozzle and used as the cleaning water.

Further, the condensate water supply unit may further include a water level sensor configured to measure a water level of the condensate water stored in the condensate water storage tank, and the control unit may receive data from the water level sensor and perform control to open the washing water supply valve when it is determined that the water level of the condensate water is equal to or lower than a predetermined water level.

That is, the control unit may clean the condenser cleanly by additionally supplying the washing water to the cleaning nozzle in consideration of the amount of condensate water stored in the condensate water storage tank.

For example, the control unit may calculate the amount of supply condensate water capable of being stored in the condensate water storage tank and supplied on the basis of the water level of the condensate water, and the control unit may adjust an opening degree of the washing water supply valve so that the washing water is supplied by the necessary amount of cleaning water made by subtracting the amount of supply condensate water from the amount of spray cleaning water required to be supplied to the cleaning nozzle and sprayed.

Further, the cleaning means may further include a washing drum discharge flow path configured to connect the heat pump and the washing drum so that the cleaning water, which has cleaned the condenser, is discharged to the washing drum.

In addition, the cleaning means may further include: a discharge port discharge flow path configured to connect the washing drum discharge flow path and the discharge port so that the cleaning water, which has cleaned the condenser, is discharged to a discharge port that discharges the washing water, which is discharged from the washing drum, to the outside; and a cleaning water discharge valve disposed between the washing drum discharge flow path and the discharge port discharge flow path and configured to open or close the discharge flow path.

With this configuration, the control unit may control the cleaning water discharge valve so that the cleaning water, which has cleaned the condenser, is discharged to any one of the washing drum and the discharge port.

That is, when the washing drum performs the washing function, the control unit may perform control so that the cleaning water, which has cleaned the condenser, is discharged to the washing drum and reused. Alternatively, when the washing drum does not perform the washing function, the control unit may perform control so that the cleaning water, which has cleaned the condenser, is discharged directly to the discharge port.

Of course, the cleaning means may include only the discharge port discharge flow path configured to connect the heat pump and the discharge port so that the cleaning water, which has cleaned the condenser, is discharged to the discharge port that discharges the washing water, which is discharged from the washing drum, to the outside, such that the cleaning water, which has cleaned the condenser, may be directly discharged.

To achieve the above-mentioned object, The present invention provides a method of controlling an integrated washing-drying machine as disclosed above, the method including: a cleaning command determining step of determining whether a condenser cleaning command is inputted; a drying determining step of determining whether a drying function is performed when the condenser cleaning command is inputted; and a condenser cleaning step of cleaning the condenser by supplying, as the cleaning water to the cleaning nozzle, at least any one of condensate water stored in a condensate water storage tank and a washing water to be supplied to the washing drum when the determination result indicates that the drying function is not performed.

In this case, the condenser cleaning command may be created by any one or a combination of two or more of a user's operation input, an automatic input at a regular interval, an input before the drying function is performed, and an input after the drying function is completed.

That is, the condenser cleaning command is inputted as a forcible input by the user's operation input, an automatic input at a regular interval, and inputs related to particular conditions before and after the drying function is performed, and therefore, the condenser may be always kept clean. Of course, all the input conditions may be inputted.

More specifically, the condenser cleaning step may include: a condensate water supplying step of supplying the condensate water to the cleaning nozzle; a condensate water level measuring step of measuring a water level of the condensate water stored in the condensate water storage tank; a washing water supplying step of supplying the washing water when it is determined that the water level of the condensate water is equal to or lower than a predetermined water level.

That is, the control unit may perform control so that the condensate water is supplied to the cleaning nozzle, and then the washing water is additionally supplied when the water level of the stored condensate water becomes equal to or lower than a predetermined water level.

Alternatively, the condenser cleaning step may include: a condensate water level measuring step of measuring a water level of the condensate water stored in the condensate water storage tank; a necessary cleaning water amount calculating step of calculating the amount of supply condensate water capable of being supplied on the basis of the water level of the condensate water and calculating the necessary amount of cleaning water made by subtracting the amount of supply condensate water from the amount of spray cleaning water required to be sprayed from the cleaning nozzle; a condensate water supplying step of supplying the condensate water to the cleaning nozzle; and a washing water supplying step of supplying the washing water by the necessary amount of cleaning water to the cleaning nozzle.

That is, the cleaning water may be supplied to the cleaning nozzle in consideration of and correspondingly to the amount of condensate water stored in the condensate water storage tank, thereby minimizing water consumption.

Further, the method of controlling an integrated washing-drying machine according to the present disclosure may further include a cleaning water discharging step of discharging the cleaning water, which has cleaned the condenser, to any one of the washing drum and a discharge port that discharges the washing water, which is discharged from the washing drum, to the outside.

Further, the method may further include a washing determining step of determining whether a washing function is performed, and the cleaning water discharging step may include discharging the cleaning water, which has cleaned the condenser, to the washing drum when the determination result indicates that the washing function is performed.

In this case, the washing determining step may determine that the washing function is performed when the washing water is supplied to the washing drum.

That is, the cleaning water, which has cleaned the condenser, may be discharged to the washing drum and reused when the washing drum performs the washing function. The cleaning water, which has cleaned the condenser, may be discharged directly to the discharge port when the washing function is not performed.

In this case, in the cleaning water discharging step, when the determination result indicates that the washing function is performed, the cleaning water, which has initially cleaned the condenser, may be discharged to the discharge port for a predetermined period of time, and then the remaining cleaning water is discharged to the washing drum.

That is, because the cleaning water, which has initially cleaned the condenser, is not clean, the cleaning water is discharged to the discharge port. The cleaning water, which becomes clean to some extent after a predetermined period of time elapses, may be discharged to the washing drum and reused to wash the laundry.

According to the integrated washing-drying machine and the method of controlling the same according to the present invention, the drying drum and the washing drum may be disposed in the single housing, thereby obtaining the effect of minimizing the height of the product.

Further, according to the present invention, the washing water to be supplied to the washing drum may be used to clean the condenser when the amount of condensate water is insufficient, thereby obtaining the effect of cleaning the condenser more cleanly.

Hereinafter, an integrated washing-drying machine and a method of controlling the same according to an embodiment of the present disclosure will be described in more detail to assist in understanding features of the present disclosure.

In giving reference numerals to constituent elements of the respective drawings attached to assist in understanding the embodiment to be described below, it should be noted that the same constituent elements will be designated by the same reference numerals, if possible, even though the constituent elements are illustrated in different drawings. In addition, in the description of the present disclosure, the specific descriptions of publicly known related configurations or functions will be omitted when it is determined that the specific descriptions may obscure the subject matter of the present disclosure.

Hereinafter, the specific embodiment of the present disclosure will be described with reference to the accompanying drawings.

<FIG> is a view schematically illustrating an integrated washing-drying machine according to an embodiment of the present disclosure, <FIG> is a view schematically illustrating a structure of the integrated washing-drying machine according to the embodiment of the present disclosure in which cleaning water is supplied to a washing drum and reused, and <FIG> is a block diagram schematically illustrating a cleaning means of the integrated washing-drying machine according to the embodiment of the present disclosure.

Referring to <FIG>, an integrated washing-drying machine <NUM> according to the present invention includes: a housing <NUM>, a drying drum <NUM> disposed at an upper side in the housing <NUM> and configured to accommodate and dry laundry, a washing drum <NUM> disposed at a lower side in the housing <NUM> and configured to accommodate and wash laundry, a heat pump <NUM> including an evaporator <NUM>, a compressor <NUM>, and a condenser <NUM> and configured to produce hot air and supply the hot air to the drying drum <NUM> to dry the laundry, and a cleaning means <NUM> configured to clean the condenser <NUM> by spraying cleaning water to the condenser <NUM>.

The cleaning means <NUM> is configured to clean the condenser <NUM> by using, as the cleaning water, at least any one of condensate water produced in the evaporator <NUM> and washing water to be supplied to the washing drum <NUM>.

The housing <NUM> is provided in the form of a quadrangular box and has a hollow portion therein. The drying drum <NUM>, the washing drum <NUM>, and the heat pump <NUM> are disposed in the housing <NUM>.

The washing drum <NUM> is disposed at the lower side in the housing <NUM> and washes the laundry according to a washing function when the laundry is loaded into the washing drum <NUM>. Because the specific configuration and method for washing the laundry in the washing drum <NUM> are publicly-known technologies, a detailed description thereof will be omitted.

The drying drum <NUM> is disposed in the housing <NUM> and provided above the washing drum <NUM>. The drying drum <NUM> dries the laundry according to a drying function when the laundry is loaded into the drying drum <NUM>. That is, the heat pump <NUM> is disposed in the housing <NUM>, hot air produced by the heat pump <NUM> is supplied to the drying drum <NUM>, and the drying drum <NUM> rotates and dries the laundry loaded into the drying drum <NUM>.

With this configuration, the drying drum <NUM> and the washing drum <NUM> are disposed in a height direction in the single housing <NUM>, and the necessary components are disposed in the single housing <NUM>, which makes it possible to reduce a height in comparison with a structure in the related art in which a washing machine and a drying machine are separately stacked.

In the heat pump <NUM>, the evaporator <NUM>, the compressor <NUM>, and the condenser <NUM> are connected by means of a refrigerant tube, and a refrigerant circulates. Air, which is heated through heat exchange between the refrigerant and the air in the condenser <NUM> and the evaporator <NUM>, is supplied to the drums.

In this case, the evaporator <NUM> recover the amount of heat of the introduced air by allowing the air introduced after drying the laundry in the drying drum <NUM> to exchange heat with the refrigerant. In addition, the evaporator <NUM> condenses moisture contained in the introduced air. Therefore, the middle-temperature humid air introduced into the evaporator <NUM> is converted into low-temperature dry air by heat exchange with the evaporator <NUM>, and the low-temperature dry air is introduced into the condenser <NUM>.

The condenser <NUM> heats the air by allowing the low-temperature dry air passing through the evaporator <NUM> to exchange heat with the refrigerant. Therefore, the low-temperature dry air passing through the evaporator <NUM> is converted into high-temperature dry air while passing through the condenser <NUM>. The high-temperature dry air is inputted into the drying drum <NUM> again and used to dry the laundry.

The compressor <NUM> compresses the evaporated refrigerant, which is evaporated while passing through the evaporator <NUM>, and supplies the refrigerant to the condenser <NUM>. That is, the high-temperature, high-pressure refrigerant compressed by the compressor <NUM> is condensed while passing through the condenser <NUM> and exchanging heat with the low-temperature air. Further, the refrigerant is evaporated while passing through the evaporator <NUM> and exchanging heat with the middle-temperature air and introduced into and compressed by the compressor <NUM>.

Further, although not illustrated in the drawings, the heat pump <NUM> may have a circulation fan configured to force the air to flow and circulate through the drying drum <NUM>, the evaporator <NUM>, and the condenser <NUM>.

The cleaning means <NUM> is configured to use, as the cleaning water for cleaning the condenser <NUM>, at least any one of the condensate water produced in the evaporator <NUM> and the washing water to be supplied to the washing drum <NUM>.

More specifically, the cleaning means <NUM> includes a cleaning nozzle <NUM> configured to spray the cleaning water to the condenser, a condensate water supply unit <NUM> configured to supply the condensate water to the cleaning nozzle <NUM>, a washing water supply unit <NUM> configured to supply the washing water to the cleaning nozzle <NUM>, and a control unit <NUM> configured to perform control to supply at least any one of the condensate water and the washing water to the cleaning nozzle <NUM>.

The cleaning nozzle <NUM> is disposed above the condenser <NUM> and serves to remove lint accumulated on the condenser <NUM> by spraying the cleaning water to a surface of a front end of the condenser <NUM>. Because the specific configuration of the cleaning nozzle <NUM> configured to clean the condenser <NUM> by spraying the cleaning water is a publicly-known technology, a detailed structure thereof will be omitted.

The condensate water supply unit <NUM> includes a condensate water storage tank <NUM> configured to store the condensate water produced in the evaporator <NUM>, and a pump <NUM> configured to supply the condensate water stored in the condensate water storage tank <NUM> to the cleaning nozzle <NUM>.

The washing water supply unit <NUM> includes a washing water supply flow path <NUM> branching off from a washing machine water supply unit <NUM>, connected to the cleaning nozzle <NUM>, and configured to supply the washing water, and a washing water supply valve <NUM> configured to open or close the washing water supply flow path <NUM>.

The washing machine water supply unit <NUM> is connected to an external water supply source such as water mains and supplied with water from the external water supply source. Further, the washing machine water supply unit <NUM> and the washing drum <NUM> are connected by means of a flow path, and the washing machine water supply unit <NUM> supplies the washing water when the washing drum <NUM> performs the washing function.

In this case, the washing water supply flow path <NUM> branches off from the flow path that connects the washing machine water supply unit <NUM> and the washing drum <NUM>, and the washing water supply valve <NUM> is disposed at a position at which the washing water supply flow path <NUM> branches off from the flow path.

That is, in a state in which the external water supply source consistently supplies water and the washing water supply valve <NUM> closes the flow path, the flow path may be opened to supply the washing water to the washing drum <NUM> in a case in which the washing drum <NUM> performs the washing function. Further, the washing water supply flow path <NUM> may be opened to supply the washing water to the cleaning nozzle <NUM> in a case in which the cleaning means <NUM> cleans the condenser.

To this end, the washing water supply valve <NUM> is configured as a valve capable of opening any one or both of the washing water supply flow path <NUM> and the flow path connected to the washing drum <NUM> or closing both of the washing water supply flow path <NUM> and the flow path connected to the washing drum <NUM>.

In addition, although not illustrated in the drawings, the washing machine water supply unit <NUM> may also have a separate valve, such that the washing machine water supply unit <NUM> may also allow or cut off the supply of the water from the external water supply source.

The control unit <NUM> controls the pump <NUM> and the washing water supply valve <NUM> so that at least any one of the condensate water and the washing water is supplied to the cleaning nozzle <NUM> and used as the cleaning water. That is, the control unit <NUM> operates only the pump <NUM> and use only the condensate water as the cleaning water. The control unit <NUM> opens the washing water supply valve <NUM> and use only the washing water as the cleaning water. The control unit <NUM> operates the pump <NUM> and open the washing water supply valve <NUM> to use both the condensate water and the washing water as the cleaning water.

Further, the condensate water supply unit <NUM> may further include a water level sensor <NUM> configured to measure a water level of the condensate water stored in the condensate water storage tank <NUM>.

In the case in which the water level sensor <NUM> is further provided, the control unit <NUM> receives data from the water level sensor <NUM> and performs control to open the washing water supply valve <NUM> when the control unit <NUM> determines that the water level of the condensate water is equal to or lower than a predetermined water level. That is, when the control unit determines that the amount of condensate water stored in the condensate water storage tank <NUM> is not sufficient to clean the condenser <NUM>, the control unit performs control to open the washing water supply valve <NUM> and supply the washing water to the cleaning nozzle <NUM>, thereby supplying the sufficient amount of cleaning water.

In this case, when the control unit <NUM> determines that the amount of condensate water stored in the condensate water storage tank <NUM> is small and thus may not be used as the cleaning water, the control unit may perform control to supply the washing water from an initial cleaning step.

For example, on the basis of the water level of the condensate water, the control unit <NUM> may calculate the amount of supply condensate water that may be stored in the condensate water storage tank <NUM> and supplied, and the control unit <NUM> may adjust an opening degree of the washing water supply valve <NUM> so that the washing water is supplied by the amount of required cleaning water made by subtracting the amount of supply condensate water from the amount of spray cleaning water required to be supplied to the cleaning nozzle <NUM> and sprayed.

Alternatively, the control unit <NUM> may perform control to perform the cleaning process only by using the condensate water in the initial cleaning step, and when the water level of the condensate water stored in the condensate water storage tank <NUM> becomes equal to or lower than the predetermined water level, the control unit <NUM> may perform control to open the washing water supply valve <NUM> to additionally supply the washing water.

Therefore, the control unit <NUM> may perform control to use the washing water as the cleaning water when the amount of condensate water is insufficient, such that the sufficient amount of cleaning water may be sprayed to the condenser <NUM> and clean the condenser <NUM> cleanly.

Further, as illustrated in <FIG>, the cleaning means <NUM> may further include a washing drum discharge flow path <NUM> configured to connect the heat pump <NUM> and the washing drum <NUM> and discharge the cleaning water, which has cleaned the condenser <NUM>, to the washing drum <NUM>. That is, the cleaning water, which has cleaned the condenser <NUM>, may be discharged to the washing drum <NUM> and used when the washing drum <NUM> performs the washing function, thereby saving water by reusing the water.

Further, the cleaning means <NUM> may further include: a discharge port discharge flow path <NUM> configured to connect the washing drum discharge flow path <NUM> and a discharge port <NUM> so that the cleaning water, which has cleaned the condenser <NUM>, is discharged to the discharge port <NUM> that discharges the washing water, which is discharged from the washing drum <NUM>, to the outside; and a cleaning water discharge valve <NUM> disposed between the washing drum discharge flow path <NUM> and the discharge port discharge flow path <NUM> and configured to open or close the discharge flow path. In this case, the control unit <NUM> may control the cleaning water discharge valve <NUM> so that the cleaning water, which has cleaned the condenser <NUM>, is discharged to any one of the washing drum <NUM> and the discharge port <NUM>.

For example, when the washing water is supplied by the washing machine water supply unit <NUM> so that the washing drum <NUM> performs the washing function, the control unit <NUM> opens the washing water supply valve <NUM> and supplies the washing water to the washing drum <NUM> and the cleaning nozzle <NUM>. In this case, the control unit <NUM> may control the cleaning water discharge valve <NUM> to open the washing drum discharge flow path <NUM>, such that the cleaning water, which has cleaned the condenser <NUM>, may be supplied to the washing drum <NUM> through the washing drum discharge flow path <NUM> and reused as the washing water for washing the laundry.

Of course, as illustrated in <FIG>, the cleaning means <NUM> may only include the discharge port discharge flow path <NUM> configured to connect the heat pump <NUM> and the discharge port <NUM> so that the cleaning water, which has cleaned the condenser <NUM>, is discharged to the discharge port <NUM> that discharges the washing water, which is discharged from the washing drum <NUM>, to the outside. That is, the cleaning water, which has cleaned the condenser <NUM>, may be discharged directly to the discharge port <NUM> without being reused.

Hereinafter, a method of controlling the integrated washing-drying machine according to the embodiment of the present disclosure will be described with reference to the accompanying drawings.

<FIG> is a flowchart schematically illustrating the method of controlling the integrated washing-drying machine according to the embodiment of the present disclosure, <FIG> and <FIG> are flowcharts schematically illustrating first and second embodiments of the condenser cleaning step of the method of controlling the integrated washing-drying machine, and <FIG> is a flowchart schematically illustrating a control method further including a washing water discharging step added to the method of controlling the integrated washing-drying machine.

Referring to <FIG>, the method of controlling the integrated washing-drying machine according to the embodiment of the present disclosure relates to a method of controlling the integrated washing-drying machine, in which the drying drum is disposed at the upper side in the housing, the washing drum is disposed at the lower side in the housing, and the cleaning water sprayed from the cleaning nozzle cleans the condenser.

The method of controlling the integrated washing-drying machine includes: a cleaning command determining step S110 of determining whether a condenser cleaning command is inputted; a drying determining step S <NUM> of determining whether the drying function is performed when the condenser cleaning command is inputted (YES in S110); and a condenser cleaning step S130 or S140 of cleaning the condenser by supplying, as the cleaning water to the cleaning nozzle, at least any one of the condensate water stored in the condensate water storage tank and the washing water to be supplied to the washing drum when the determination result indicates that the drying function is not performed (NO in S <NUM>).

In this case, the condenser cleaning command is created by any one or a combination of two or more of a user's operation input, an automatic input at a regular interval, an input before the drying function is performed, and an input after the drying function is completed.

More specifically, in the case of the user's operation input, an automatic condenser cleaning button is provided on an operation panel or a remote controller of the integrated washing-drying machine, and the user may forcibly clean the condenser by pushing the automatic condenser cleaning button.

Further, in the case of the automatic input at a regular interval, the condenser cleaning command is set to be inputted at regular intervals to the control unit, and the condenser may be automatically cleaned as the condenser cleaning command is automatically inputted at regular set intervals.

Further, in the case of the input before the drying function is performed, when a drying function performing command is inputted to dry the laundry in the drying drum, the drying function may be performed after the condenser is cleaned as the condenser cleaning command is inputted immediately before the drying function is performed.

Further, in the case of the input after the drying function is completed, the condenser may be cleaned as the condenser cleaning command is inputted immediately after the laundry is completely dried in the drying drum.

Therefore, since all the methods of inputting the condenser cleaning commands may be set, or the condenser cleaning commands may be selectively inputted, as necessary, thereby always keeping the condenser clean.

The condenser cleaning step S130 or S140 is a step of cleaning the condenser by supplying, as the cleaning water to the cleaning nozzle, at least any one of the condensate water stored in the condensate water storage tank and the washing water to be supplied to the washing drum. Two different embodiments of the condenser cleaning step S130 or S140 may be implemented. That is, the condenser cleaning steps S130 and S140 may be classified into the first condenser cleaning step S130 as the first embodiment, and the second condenser cleaning step S140 as the second embodiment.

More specifically, referring to <FIG>, the first condenser cleaning step S130 includes a condensate water supplying step S131 of supplying the condensate water to the cleaning nozzle, a condensate water level measuring step S132 of measuring the water level of the condensate water stored in the condensate water storage tank, a washing water supplying step S134 of supplying the washing water to the cleaning nozzle when the determination result indicates that the water level of the condensate water is equal to or lower than the predetermined water level (YES in S133).

That is, in the first condenser cleaning step S130, the condensate water is primarily supplied to the cleaning nozzle first, and the washing water is additionally supplied when the water level of the condensate water stored in the condensate water storage tank becomes equal to or lower than the predetermined water level as the condensate water is supplied to the cleaning nozzle. Of course, the washing water is supplied together with the condensate water at the initial time when the condensate water is stored at the predetermined water level or lower before the condenser cleaning command is inputted.

Further, referring to <FIG>, the second condenser cleaning step S140 includes a condensate water level measuring step S141 of measuring the water level of the condensate water stored in the condensate water storage tank, a necessary cleaning water amount calculating step S142 of calculating the necessary amount of cleaning water required to be supplied to the cleaning nozzle in consideration of the amount of condensate water, a condensate water supplying step S143 of supplying the condensate water to the cleaning nozzle, and a washing water supplying step S144 of supplying the washing water to the cleaning nozzle by the necessary amount of cleaning water.

In this case, in the necessary cleaning water amount calculating step S142, the amount of supply condensate water, which may be supplied, is calculated on the basis of the water level of the condensate water, and the necessary amount of cleaning water is calculated by subtracting the amount of supply condensate water from the amount of spray cleaning water required to be sprayed from the cleaning nozzle.

That is, the washing water is supplied as the additionally required cleaning water calculated by subtracting the amount of condensate water stored in the condensate water storage tank from the total amount of cleaning water required to be supplied to the cleaning nozzle and used to clean the condenser. Therefore, the necessary amount of cleaning water is calculated in advance, which makes it possible to minimize the use of washing water and save water.

Further, the method of controlling the integrated washing-drying machine according to the present disclosure further includes a washing determining step S150 of determining whether the washing function is performed, and a cleaning water discharging step S160 or S <NUM> of discharging the cleaning water, which has cleaned the condenser, to any one of the washing drum and the discharge port that discharges the washing water, which is discharged from the washing drum, to the outside.

More specifically, in the cleaning water discharging step, the cleaning water, which has cleaned the condenser, is discharged to the washing drum and reused when the determination result indicates that the washing function is performed (YES in S <NUM>), thereby saving water.

Further, in the cleaning water discharging step, the cleaning water, which has cleaned the condenser, is discharged directly to the discharge port when the determination result indicates that the washing function is not performed (NO in S150). That is, if the cleaning water is discharged to the washing drum that does not perform the washing function, the unnecessary water remains in the washing drum, which may degrade cleanliness of the washing drum. Therefore, the cleaning water is discharged directly to the discharge port when the washing function is not performed (S170).

In this case, the washing determining step S150 determines that the washing function is performed when the washing water is supplied to the washing drum among various steps for washing the laundry. That is, a step of supplying the washing water to the washing drum for washing the laundry and a step of supplying the washing water to the washing drum for rinsing the laundry are determined as a step of performing the washing function. However, clean washing water needs to be supplied, if possible, at the time of supplying the washing water for rinsing the laundry. Therefore, the step of supplying the washing water to the washing drum for washing the laundry may be determined as the step of performing the washing function.

Further, in the cleaning water discharging step, the cleaning water, which has initially cleaned the condenser, may be discharged to the discharge port for a predetermined period of time, and then the remaining cleaning water may be discharged to the washing drum when the determination result indicates that the washing function is performed (YES in S <NUM>).

That is, because the cleaning water, which has initially cleaned the condenser, contains a large amount of impurities, the cleaning water, which has initially cleaned the condenser, is discharged to the discharge port. After the condenser is cleaned to some extent, the cleaning water is comparatively clean. Therefore, when a predetermined time elapses after the condenser begins to be cleaned, the cleaning water may be discharged to the washing drum and reused.

Therefore, according to the method of controlling the integrated washing-drying machine according to the present disclosure, the condenser may be cleaned by using the cleaning water even though a small amount of condensate water is stored in the condensate water storage tank, which makes it possible to clean the condenser clean.

Claim 1:
An integrated washing-drying machine comprising:
a housing (<NUM>);
a drying drum (<NUM>) disposed at an upper side in the housing (<NUM>) and configured to accommodate and dry laundry;
a washing drum (<NUM>) disposed at a lower side in the housing (<NUM>) and configured to accommodate and wash laundry;
a heat pump (<NUM>) having an evaporator (<NUM>), a compressor (<NUM>), and a condenser (<NUM>), and wherein the heat pump (<NUM>) is configured to produce hot air for drying laundry and to supply the hot air to the drying drum (<NUM>); and
a cleaning means (<NUM>) configured to clean the condenser (<NUM>) by spraying cleaning water to the condenser (<NUM>),
wherein the cleaning means (<NUM>) is configured to use, as the cleaning water, at least any one of condensate water produced in the evaporator (<NUM>) and washing water to be supplied to the washing drum (<NUM>),
and characterised in that: the cleaning means (<NUM>) comprises:
a cleaning nozzle (<NUM>) configured to spray the cleaning water to the condenser (<NUM>);
a condensate water supply unit (<NUM>) comprising a condensate water storage tank (<NUM>) configured to store the condensate water produced in the evaporator (<NUM>), and a pump (<NUM>) configured to supply the condensate water stored in the condensate water storage tank (<NUM>) to the cleaning nozzle (<NUM>);
a washing water supply unit (<NUM>) comprising a washing water supply flow path (<NUM>) branching off from a washing machine water supply unit (<NUM>), connected to the cleaning nozzle (<NUM>), and configured to supply the washing water, and a washing water supply valve (<NUM>) configured to open or close the washing water supply flow path (<NUM>); and
a control unit (<NUM>) configured to control the pump (<NUM>) and the washing water supply valve (<NUM>) so that at least any one of the condensate water and the washing water is supplied to the cleaning nozzle (<NUM>) and used as the cleaning water.