EP1967633B1 - Washing machine detecting condensed water temperature and drying control method of the same - Google Patents
Washing machine detecting condensed water temperature and drying control method of the same Download PDFInfo
- Publication number
- EP1967633B1 EP1967633B1 EP07123822.4A EP07123822A EP1967633B1 EP 1967633 B1 EP1967633 B1 EP 1967633B1 EP 07123822 A EP07123822 A EP 07123822A EP 1967633 B1 EP1967633 B1 EP 1967633B1
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- EP
- European Patent Office
- Prior art keywords
- drying
- temperature
- condensed water
- laundry
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
- D06F58/46—Control of the operating time
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/04—Quantity, e.g. weight or variation of weight
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/08—Humidity
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/38—Time, e.g. duration
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/58—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to condensation, e.g. condensate water level
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/36—Condensing arrangements, e.g. control of water injection therefor
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/56—Remaining operation time; Remaining operational cycles
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
- D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
- D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
Definitions
- the present invention relates to a washing machine with a drying unit, and, more particularly, to a washing machine and a drying control method of the same that is capable of detecting a temperature of condensed water used during a drying operation to control drying time.
- a drying unit is a unit to supply hot air heated by a heater into a drum, while the drum, in which wetted clothes (laundry) are received, is rotated at a low speed such that the clothes are dried by the hot air.
- a washing-and-drying machine normally, a drum-type washing machine
- a drying unit that is capable of performing only a drying operation or performing a drying operation after the completion of spin-drying in connection with a washing operation.
- a washing machine with such a drying unit is disclosed in Korean Registered Patent Publication No. 10-0435241 .
- the disclosed washing machine is constructed in a structure in which, after the completion of a spin-drying operation, high-temperature dry air (hot air) generated by a heater and a fan is introduced into a drum to remove moisture contained in laundry, which is changed into high-temperature, high-humidity air, and is transferred to a condensing duct. Then, a condensing process is carried out to remove the moisture taken from laundry from the air.
- hot air high-temperature dry air
- the high-temperature, high-humidity air is brought into contact with cool water (condensed water) with the result that the high-temperature, high-humidity air is condensed and thus changed into dry air.
- the dry air is reheated by the heater, and the reheated air is introduced into the drum. The above procedure is repeated to dry the laundry.
- the condensed water used during the condensing process is tap water (cool water) for domestic use, the temperature of which is changed due to seasonal or other environmental causes.
- the tap water has a temperature distribution including the highest temperature of 30° in summer and the lowest temperature of 5° in winter. In foreign countries, especially some Middle Eastem areas, the temperature of tap water often exceeds 45°. In this case, when the temperature of the condensed water is low, the condensing efficiency is high with the result that the drying efficiency is increased. However, when the temperature of the condensed water is high, the condensing efficiency is low with the result that the drying efficiency is decreased.
- An algorithm (specifically, for drying time), used during the drying process of the conventional washing machine with the drying unit, is equally applied irrespective of the difference in temperature of the condensed water. As a result, the drying efficiency is lowered depending upon the temperature of the condensed water, which is a cause of consumers' dissatisfaction.
- the drying process is continuously carried out for the remaining drying time, due to the low temperature of the condensed water, although the clothes are sufficiently dried. As a result, the clothes are damaged due to the overdryness, and in addition, the washing machine is badly affected due to the overheating of the washing machine.
- the temperature of the condensed water is high, the drying process is completed after the elapse of the predetermined drying time, due to the high temperature of the condensed water, the drying time is insufficient. As a result, the clothes are not sufficiently dried, resulting in consumers' dissatisfaction.
- Reference EP 0 829 569 A2 discloses a washing machine with a washing drum, wherein a spin dryer is rotatably attached into the washing drum.
- the washing machine further comprises a drying means, including a fan for creating an air flow to be fed into the spin dryer, and a heat exchanger for dehumidifying the air stream provided by the fan.
- Reference EP 1 657 341 A2 relates to a drying control method of a washing and drying machine, in which cooling water dropped from a condensation duct to a tub accelerates the condensation of moisture contained in circulated air.
- a temperature sensor is arranged at a lower portion of the condensation duct, in order to measure a temperature of the cooling water dropped from the condensation duct to the tub.
- Reference EP 1 698 722 A1 relates to a washing machine and suds removal method thereof.
- the washing machine comprises a condensation duct into which a temperature sensor is mounted.
- the water temperature sensor is immersed in the water, gathered in the condensation duct, and is adapted to send a temperature of the water, wherein a controller uses that information to determine an ending point of the drying cycle based on the temperature of the condensed water. It is the disadvantage of this washing machine that if the cooling water varies in its temperature, the ending point of the drying operation might be set, even if the laundry is not sufficiently dried.
- a drying control method of a washing machine with a drying unit to dry laundry including detecting a temperature of condensed water supplied during the drying of the laundry, setting a drying time based on the detected temperature of the condensed water, and operating the drying unit according to the set drying time to perform a drying operation.
- the detecting the temperature of the condensed water includes detecting the temperature of cool water supplied to remove moisture contained in the laundry.
- the setting the drying time includes setting the drying time such that the drying time is decreased when the detected temperature of the condensed water is low, and the drying time is increased when the detected temperature of the condensed water is high.
- the setting the drying time includes detecting a weight of laundry to be dried, searching the drying time of a plurality of drying times corresponding to the detected weight of the laundry, and adjusting the searched drying time based on the detected temperature of the condensed water to set the set drying time.
- the adjusting the drying time is decreasing the drying time when the temperature of the condensed water is lower than a reference temperature range, and increasing the drying time when the temperature of the condensed water is higher than the reference temperature range.
- the reference temperature range may be approximately 15.1 to 25°.
- a washing machine including a rotary drum receiving laundry to be dried, a drying unit supplying hot air into the rotary drum such that the laundry is dried, a duct guiding the hot air to the rotary drum, a valve controlling a supply of condensed water during drying of the laundry, a temperature sensor detecting a temperature of the condensed water supplied, and a control unit controlling the valve to supply the condensed water to the duct, setting a drying time based on the temperature of the condensed water detected by the temperature sensor, and operating the drying unit according to the set drying time to perform a drying operation.
- the drying unit may include a heater generating hot air and a fan supplying the hot air into the rotary drum.
- the hot air, supplied into the rotary drum is changed into high-temperature, high-humidity air due to moisture contained in the laundry, and the high-temperature, high-humidity air is guided to the drying unit through the duct.
- the temperature sensor may detect the temperature of cool water supplied to the duct to remove moisture contained in the laundry.
- the control unit may set the drying time such that the drying time is decreased when the detected temperature of the condensed water is low, and the drying time is increased when the temperature of the condensed water is high.
- the control unit may detect a weight of laundry to be dried and adjust the drying time searched according to the detected weight of the laundry based on the temperature of the condensed water.
- the control unit may compare the temperature of the condensed water with a predetermined reference temperature range and decrease the drying time when the temperature of the condensed water is lower than the reference temperature range, and increases the drying time when the temperature of the condensed water is higher than the reference temperature range.
- a method of controlling a washing machine including a condensing duct including: detecting a weight of laundry to be dried; determining a drying time to perform a drying operation based on the detected weight of the laundry; detecting a temperature of water supplied to the condensing duct; and increasing, decreasing or maintaining the determined drying time based on the detected temperature.
- a method of controlling a washing machine including a condensing duct including: detecting a weight of laundry to be dried; detecting a temperature of water supplied to the condensing duct; and setting a drying time to perform a drying operation of the laundry based on the detected weight of the laundry and the detected temperature of the water.
- a washing machine including: a drying unit supplying hot air to laundry to be dried; a condensing duct introducing air to the drying unit; a temperature sensor detecting a temperature of water supplied to the condensing unit; and a control unit detecting a weight of the laundry, selecting a drying time from a plurality of stored drying times based on the detected temperature of the condensed water and the detected weight of the laundry, and operating the drying unit according to the selected drying time to perform a drying operation.
- FIG. 1 is a sectional view illustrating the structure of a washing machine with a drying unit according to the present embodiment.
- the washing machine includes a drum-type water tub 11 mounted in a machine body 10 to receive water (wash water or rinse water) and a rotary drum 12 rotatably mounted in the water tub 11.
- the rotary drum 12 has a plurality of spin-drying holes.
- a motor 13 to rotate the rotary drum 12 in alternating directions such that washing, rinsing, and spin-drying operations are performed.
- a washing heater 16 to heat water (specifically, wash water) supplied into the water tub 11 according to a user's selection of a temperature of water.
- an opening 14 In the front of the water tub 11 and the rotary drum 12 is formed an opening 14, through which a user withdraws clothes in front of the machine body 10.
- a door 15 At the front of the machine body 10 is mounted a door 15 to open and close the opening 14.
- a detergent supply unit 18 to supply detergent
- a water supply unit 20 to supply water (wash water or rinse water).
- the detergent supply unit 18 has several partitioned spaces.
- the detergent supply unit 18 is mounted at a front side of the machine body 10 such that a user may easily put detergent and rinse into the respective partitioned spaces.
- the water supply unit 20 includes a water supply pipe 22 to supply water and a water supply valve 24 mounted on the water supply pipe 22 to control the supply of water.
- the water supply pipe 22 is connected to the detergent supply unit 18 such that water from the outside is supplied to the detergent supply unit 18.
- a connection pipe 26 Between the detergent supply unit 18 and the water tub 11 is mounted a connection pipe 26, through which the water having passed through the detergent supply unit 18 is supplied into the water tub 11 together with detergent.
- a water supply nozzle 28 At the inlet of the connection pipe 26 is mounted a water supply nozzle 28. Consequently, the detergent in the detergent supply unit 18 is supplied into the water tub 11 while being dissolved in the water.
- the washing machine further includes a drainage unit 30 to drain the water in the water tub 11.
- the drainage unit 30 includes a drainage pipe 31 connected to a bottom of the water tub 11 to guide the water in the water tub 11 to the outside and a drainage pump 32 mounted on the drainage pipe 31.
- the washing machine further includes a drying unit 40 to dry laundry (clothes).
- the drying unit 40 includes a drying fan 41 above the water tub 11, a drying duct 42 connected between an outlet port 41 b of the drying fan 41 and an air introduction port 45 formed in an upper side of the opening 14 of the water tub 11, a condensing duct 43 mounted at a rear of the water tub 11 such that the condensing duct 43 is connected between an air discharge port 46 formed in the rear bottom of the water tub 11 and an inlet port 41 a of the drying fan 41, and a drying heater 44 mounted in the drying duct 42 to generate high-temperature air, which is supplied into the rotary drum 12.
- an injection nozzle 47 to inject condensed water (cool water) into the condensing duct 43 such that moisture is condensed and removed during the passage of high-temperature, high-humidity air, generated by drying the laundry, along the condensing duct 43.
- the injection nozzle 47 is connected to the water supply unit 20, via a condensed water supply pipe 48 and a condensed water valve 49, such that condensed water is supplied to the injection nozzle 47.
- the condensed water injected from the injection nozzle 47, flows to a lower part of the condensing duct 43 along an inner surface of the condensing duct 43.
- the contact between the condensed water and high-temperature, high-humidity air rising from the lower part of the condensing duct 43 is increased, and therefore the condensing efficiency is improved.
- a discharge port 43a through which the condensed water is discharged, such that the condensed water that is discharged through the discharge port 43a, is introduced into the drainage pipe 31 of the drainage unit 30.
- a temperature sensor 50 to detect the temperature of the condensed water injected into the condensing duct 43.
- the temperature sensor 50 controls drying time differently depending upon the temperature of the condensed water to accomplish optimum drying efficiency irrespective of the difference in temperature of the condensed water injected during the condensing process. For example, when the temperature of the condensed water is low, the drying time is decreased in consideration of a fact that when the temperature of the condensed water is low, the condensing efficiency is increased, and thus the drying efficiency is increased. On the other hand, when the temperature of the condensed water is high, the drying time is increased in consideration of a fact that when the temperature of the condensed water is high, the condensing efficiency is decreased, and thus the drying efficiency is decreased.
- the washing machine with the drying unit is operated as follows.
- the washing heater 16 is operated to heat the wash water in the water tub 11 to a temperature necessary to wash the clothing.
- the rotary drum 12 is rotated in alternating directions by the motor 13. As a result, the laundry is washed by the frictional force between the laundry and the rotary drum and a dissolving force of the detergent.
- a rinsing operation based on a repetition of spin-drying and the water supply, and a spin-drying operation based on the high-speed rotation of the rotary drum 12 are performed.
- a drying operation is performed.
- the drying heater 44 and the drying fan 41 are operated, during the drying operation, while the rotary drum 12 is rotated slowly by the motor 13, air in the rotary drum 12 is introduced to the drying fan 41 through the condensing duct 43, and is discharged into the rotary drum 12 through the drying duct 42. This circulation of the air is repeated.
- the air in the drying duct 42 is heated by the drying heater 44.
- the high-temperature dry air is introduced into the rotary drum 12, and the laundry in the rotary drum 12 is heated by the high-temperature dry air (hot air) with the result that moisture contained in the laundry is evaporated, and therefore the laundry is dried.
- the high-temperature dry air absorbs the moisture from the wet laundry, and therefore, the high-temperature dry air is changed into high-temperature, high-humidity air.
- the high-temperature, high-humidity air is transferred to the condensing duct 43, where the high-temperature, high-humidity air is brought into contact with condensed air (cool air) injected through the injection nozzle 47.
- the high-temperature, high-humidity air is condensed and thus changed into dry air.
- the dry air is reheated by the drying heater 44 and introduced into the rotary drum. The above procedure is repeated to dry the laundry.
- FIG. 2 is a control block diagram of the washing machine with the drying unit according to the present embodiment.
- the washing machine further includes a signal input unit 100, a water level detection unit 110, a dryness detection unit 120, a control unit 130, and a drive unit 140.
- the signal input unit 100 inputs operation information, such as a washing course, a washing temperature, spin-drying RPM, and the addition of rinsing, which are selected by a user, to the control unit 130. Specifically, the signal input unit 100 selects and inputs a single drying course to perform only a drying operation or a post-operation drying course to perform a drying operation after the completion of spin-drying in connection with a washing operation to the control unit 130.
- operation information such as a washing course, a washing temperature, spin-drying RPM, and the addition of rinsing, which are selected by a user.
- the signal input unit 100 selects and inputs a single drying course to perform only a drying operation or a post-operation drying course to perform a drying operation after the completion of spin-drying in connection with a washing operation to the control unit 130.
- the water level detection unit 110 detects the water level of water supplied into the water tub 11, and the dryness detection unit 120 detects the temperature and humidity of the laundry to confirm the dryness of the laundry.
- the control unit 130 is a microcomputer, for example, to control the washing machine based on the operation information inputted from the signal input unit 100.
- the control unit 130 controls the drying unit 40 to dry the laundry.
- the control unit 130 controls differently the drying time based on the temperature of condensed water injected during the drying operation.
- the drive unit 140 drives the motor 13, the washing heater 16, the water supply valve 24, the drainage pump 32, the drying fan 41, the drying heater 44, and the condensed water valve 49 according to a drive control signal of the control unit 130.
- FIG. 3 is a flow chart illustrating a drying control method of the washing machine with the drying unit according to the present embodiment.
- the drying control method according to the present embodiment is applicable to any courses to perform a drying operation, including a single drying course to perform only a drying operation and a post-operation continuous drying course to perform a drying operation after the completion of spin-drying in connection with a washing operation.
- the operation information selected by the user is inputted to the control unit 130 through the signal input unit 100.
- control unit 130 determines whether the selected operation is a drying operation based on the operation information inputted from the signal input unit 100 (200).
- the control unit 130 controls the condensed water valve 49 to supply condensed water (cool water) necessary to dry the laundry.
- condensed water cool water
- normal tap water cool water
- the procedure returns to operation 200.
- the temperature of the condensed water injected into the condensing duct 43 is detected by the temperature sensor mounted in the condensing duct 43, and the detected temperature is inputted to the control unit 130 (204).
- the condensed water injected into the condensing duct 43 is tap water (cool water) for domestic use.
- the temperature of the tap water may be changed due to seasonal or other environmental causes.
- the tap water has a temperature distribution including a highest temperature of 30° in summer and a lowest temperature of 5° in winter. In foreign countries, especially some Middle Eastem areas, the temperature of tap water often exceeds 45°.
- control unit 130 detects the weight of laundry (clothes) to be dried (206), and searches for a drying time corresponding to the detected weight of the laundry using a table showing drying time based on the weight of laundry to be dried as shown in FIG. 4 (208).
- FIG. 4 is a table showing drying times based on the weight of laundry to be dried. For example, when the weight of laundry to be dried is 2 to 3 kg, the drying time is set to be 90 minutes. When the weight of laundry to be dried is 3 to 5 kg, the drying time is set to be 120 minutes.
- control unit 130 adjusts the drying time corresponding to the detected temperature of the condensed water by adding or subtracting the drying time searched from FIG. 4 using a table showing an adjustment of drying times based on the temperature of condensed water as shown in FIG. 4 (210).
- the addition and subtraction of the drying time are accomplished by decreasing the drying time when the temperature of the condensed water is lower than a predetermined temperature range (approximately 15.1 to 25°), and increasing the drying time when the temperature of the condensed water is higher than the predetermined temperature range.
- a predetermined temperature range approximately 15.1 to 25°
- FIG. 5 is a table showing an adjustment of a drying time based on the temperature of condensed water when the weight of laundry to be dried is 3 kg. For example, when the temperature of the condensed water is 0 to 15°, the drying time is subtracted by 5 minutes.
- the drying time is added by 10 minutes.
- control unit 130 controls the motor 13 to slowly rotate the rotary drum 12 such that the laundry is dried during the drying time that is adjusted based on the temperature of the condensed water.
- the drying heater 44 and the drying fan 41 are operated such that air in the rotary drum 12 is introduced to the drying fan 41 through the condensing duct 43, and is discharged into the rotary drum 12 through the drying duct 42. This circulation of the air is repeated.
- the air in the drying duct 42 is heated by the drying heater 44.
- the high-temperature dry air is introduced into the rotary drum 12, and the laundry in the rotary drum 12 is heated by the high-temperature dry air (hot air) with the result that moisture contained in the laundry is evaporated, and therefore, the laundry is dried.
- the high-temperature dry air absorbs the moisture from the wet laundry, and therefore, the high-temperature dry air is changed into high-temperature, high-humidity air.
- the high-temperature, high-humidity air is transferred to the condensing duct 43, where the high-temperature, high-humidity air is brought into contact with condensed air (cool air) injected through the injection nozzle 47.
- the high-temperature, high-humidity air is condensed and thus changed into dry air.
- the dry air is reheated by the drying heater 44 and introduced into the rotary drum. The above procedure is repeated to dry the laundry (212).
- FIG. 6 is an experimental data table showing dryness and drying time changed depending upon the temperature of condensed water when the weight of laundry to be dried is 2957.6 g (approximately 3 kg). It can be seen from FIG. 6 that the dryness is lowered and the drying time is increased with the increase of the temperature of the condensed water.
- the control unit 130 counts the drying time, during the drying operation, to determine whether a predetermined drying time has elapsed (214). When the predetermined drying time has not elapsed, the procedure returns to 212 to continuously perform the drying operation.
- the control unit 130 stops the drying heater 44, the drying fan 41, and the motor 13 to interrupt the drying operation (216).
- the washing machine with the drying unit according to the present embodiment and the drying control method of the same have the effect of controlling drying time based on the temperature of condensed water used during the drying operation to accomplish optimum drying efficiency, thereby increasing consumers' satisfaction.
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Description
- The present invention relates to a washing machine with a drying unit, and, more particularly, to a washing machine and a drying control method of the same that is capable of detecting a temperature of condensed water used during a drying operation to control drying time.
- Generally, a drying unit is a unit to supply hot air heated by a heater into a drum, while the drum, in which wetted clothes (laundry) are received, is rotated at a low speed such that the clothes are dried by the hot air. Recently, there has been marketed a washing-and-drying machine (normally, a drum-type washing machine) including a drying unit that is capable of performing only a drying operation or performing a drying operation after the completion of spin-drying in connection with a washing operation.
- A washing machine with such a drying unit is disclosed in Korean Registered Patent Publication No.
10-0435241 - The condensed water used during the condensing process is tap water (cool water) for domestic use, the temperature of which is changed due to seasonal or other environmental causes. For example, the tap water has a temperature distribution including the highest temperature of 30° in summer and the lowest temperature of 5° in winter. In foreign countries, especially some Middle Eastem areas, the temperature of tap water often exceeds 45°. In this case, when the temperature of the condensed water is low, the condensing efficiency is high with the result that the drying efficiency is increased. However, when the temperature of the condensed water is high, the condensing efficiency is low with the result that the drying efficiency is decreased.
- An algorithm (specifically, for drying time), used during the drying process of the conventional washing machine with the drying unit, is equally applied irrespective of the difference in temperature of the condensed water. As a result, the drying efficiency is lowered depending upon the temperature of the condensed water, which is a cause of consumers' dissatisfaction.
- Specifically, when the temperature of the condensed water is low, the drying process is continuously carried out for the remaining drying time, due to the low temperature of the condensed water, although the clothes are sufficiently dried. As a result, the clothes are damaged due to the overdryness, and in addition, the washing machine is badly affected due to the overheating of the washing machine. On the other hand, when the temperature of the condensed water is high, the drying process is completed after the elapse of the predetermined drying time, due to the high temperature of the condensed water, the drying time is insufficient. As a result, the clothes are not sufficiently dried, resulting in consumers' dissatisfaction.
-
Reference EP 0 829 569 A2 discloses a washing machine with a washing drum, wherein a spin dryer is rotatably attached into the washing drum. The washing machine further comprises a drying means, including a fan for creating an air flow to be fed into the spin dryer, and a heat exchanger for dehumidifying the air stream provided by the fan. -
Reference EP 1 657 341 A2 relates to a drying control method of a washing and drying machine, in which cooling water dropped from a condensation duct to a tub accelerates the condensation of moisture contained in circulated air. A temperature sensor is arranged at a lower portion of the condensation duct, in order to measure a temperature of the cooling water dropped from the condensation duct to the tub. -
Reference EP 1 698 722 A1 relates to a washing machine and suds removal method thereof. The washing machine comprises a condensation duct into which a temperature sensor is mounted. The water temperature sensor is immersed in the water, gathered in the condensation duct, and is adapted to send a temperature of the water, wherein a controller uses that information to determine an ending point of the drying cycle based on the temperature of the condensed water. It is the disadvantage of this washing machine that if the cooling water varies in its temperature, the ending point of the drying operation might be set, even if the laundry is not sufficiently dried. - It is the object of the present invention to provide a drying control method, which can be improved with simple constructive technical features in such a way that an efficient drying time can be set for the drying operation, which ensures less energy consumption and further prevents damaging the clothes to be dried. Further, it is the object to provide a washing machine that is able to conduct such a drying control method.
- This object can be solved with the technical features of
claim 1 or the technical features of independent claim 6. - Further improved embodiments are provided with the technical features of the dependent claims.
- Therefore, it is an aspect of the embodiment to provide a washing machine with a drying unit and a drying control method of the same that is capable of controlling drying time based on the temperature of condensed water used during a drying operation to accomplish optimum drying efficiency.
- Additional aspects and/or advantages will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the invention.
- The foregoing and/or other aspects are achieved by providing a drying control method of a washing machine with a drying unit to dry laundry, the drying control method including detecting a temperature of condensed water supplied during the drying of the laundry, setting a drying time based on the detected temperature of the condensed water, and operating the drying unit according to the set drying time to perform a drying operation.
- The detecting the temperature of the condensed water includes detecting the temperature of cool water supplied to remove moisture contained in the laundry.
- The setting the drying time includes setting the drying time such that the drying time is decreased when the detected temperature of the condensed water is low, and the drying time is increased when the detected temperature of the condensed water is high.
- The setting the drying time includes detecting a weight of laundry to be dried, searching the drying time of a plurality of drying times corresponding to the detected weight of the laundry, and adjusting the searched drying time based on the detected temperature of the condensed water to set the set drying time.
- The adjusting the drying time is decreasing the drying time when the temperature of the condensed water is lower than a reference temperature range, and increasing the drying time when the temperature of the condensed water is higher than the reference temperature range.
- The reference temperature range may be approximately 15.1 to 25°.
- The foregoing and/or other aspects are achieved by providing a washing machine including a rotary drum receiving laundry to be dried, a drying unit supplying hot air into the rotary drum such that the laundry is dried, a duct guiding the hot air to the rotary drum, a valve controlling a supply of condensed water during drying of the laundry, a temperature sensor detecting a temperature of the condensed water supplied, and a control unit controlling the valve to supply the condensed water to the duct, setting a drying time based on the temperature of the condensed water detected by the temperature sensor, and operating the drying unit according to the set drying time to perform a drying operation.
- The drying unit may include a heater generating hot air and a fan supplying the hot air into the rotary drum.
- The hot air, supplied into the rotary drum is changed into high-temperature, high-humidity air due to moisture contained in the laundry, and the high-temperature, high-humidity air is guided to the drying unit through the duct.
- The temperature sensor may detect the temperature of cool water supplied to the duct to remove moisture contained in the laundry.
- The control unit may set the drying time such that the drying time is decreased when the detected temperature of the condensed water is low, and the drying time is increased when the temperature of the condensed water is high.
- The control unit may detect a weight of laundry to be dried and adjust the drying time searched according to the detected weight of the laundry based on the temperature of the condensed water.
- The control unit may compare the temperature of the condensed water with a predetermined reference temperature range and decrease the drying time when the temperature of the condensed water is lower than the reference temperature range, and increases the drying time when the temperature of the condensed water is higher than the reference temperature range.
- The foregoing and/or other aspects are achieved by providing a method of controlling a washing machine including a condensing duct, including: detecting a weight of laundry to be dried; determining a drying time to perform a drying operation based on the detected weight of the laundry; detecting a temperature of water supplied to the condensing duct; and increasing, decreasing or maintaining the determined drying time based on the detected temperature.
- The foregoing and/or other aspects are achieved by providing a method of controlling a washing machine including a condensing duct, including: detecting a weight of laundry to be dried; detecting a temperature of water supplied to the condensing duct; and setting a drying time to perform a drying operation of the laundry based on the detected weight of the laundry and the detected temperature of the water.
- The foregoing and/or other aspects are achieved by providing a washing machine, including: a drying unit supplying hot air to laundry to be dried; a condensing duct introducing air to the drying unit; a temperature sensor detecting a temperature of water supplied to the condensing unit; and a control unit detecting a weight of the laundry, selecting a drying time from a plurality of stored drying times based on the detected temperature of the condensed water and the detected weight of the laundry, and operating the drying unit according to the selected drying time to perform a drying operation.
- These and/or other aspects and advantages will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, of which:
-
FIG. 1 is a sectional view illustrating the structure of a washing machine with a drying unit according to the present embodiment; -
FIG. 2 is a control block diagram of the washing machine with the drying unit according to the present embodiment; -
FIG. 3 is a flow chart illustrating a drying control method of the washing machine with the drying unit according to the present embodiment; -
FIG. 4 is a table showing drying time based on the weight of laundry to be dried according to the present embodiment; -
FIG. 5 is a table showing adjustment of drying time based on the temperature of condensed water according to the present embodiment; and -
FIG. 6 is an experimental data table showing dryness and drying time based on the temperature of condensed water according to the present embodiment. - Reference will now be made in detail to the embodiment, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiment is described below to explain the present invention by referring to the figures.
-
FIG. 1 is a sectional view illustrating the structure of a washing machine with a drying unit according to the present embodiment. - Referring to
FIG. 1 , the washing machine includes a drum-type water tub 11 mounted in amachine body 10 to receive water (wash water or rinse water) and arotary drum 12 rotatably mounted in thewater tub 11. Therotary drum 12 has a plurality of spin-drying holes. - Below the
water tub 11 is mounted amotor 13 to rotate therotary drum 12 in alternating directions such that washing, rinsing, and spin-drying operations are performed. At an inside bottom of thewater tub 11 is mounted awashing heater 16 to heat water (specifically, wash water) supplied into thewater tub 11 according to a user's selection of a temperature of water. - In the front of the
water tub 11 and therotary drum 12 is formed anopening 14, through which a user withdraws clothes in front of themachine body 10. At the front of themachine body 10 is mounted adoor 15 to open and close theopening 14. - Above the
water tub 11 are mounted adetergent supply unit 18 to supply detergent and awater supply unit 20 to supply water (wash water or rinse water). - The
detergent supply unit 18 has several partitioned spaces. Thedetergent supply unit 18 is mounted at a front side of themachine body 10 such that a user may easily put detergent and rinse into the respective partitioned spaces. - The
water supply unit 20 includes awater supply pipe 22 to supply water and awater supply valve 24 mounted on thewater supply pipe 22 to control the supply of water. Thewater supply pipe 22 is connected to thedetergent supply unit 18 such that water from the outside is supplied to thedetergent supply unit 18. Between thedetergent supply unit 18 and thewater tub 11 is mounted aconnection pipe 26, through which the water having passed through thedetergent supply unit 18 is supplied into thewater tub 11 together with detergent. At the inlet of theconnection pipe 26 is mounted awater supply nozzle 28. Consequently, the detergent in thedetergent supply unit 18 is supplied into thewater tub 11 while being dissolved in the water. - The washing machine further includes a
drainage unit 30 to drain the water in thewater tub 11. Thedrainage unit 30 includes adrainage pipe 31 connected to a bottom of thewater tub 11 to guide the water in thewater tub 11 to the outside and adrainage pump 32 mounted on thedrainage pipe 31. - The washing machine further includes a drying
unit 40 to dry laundry (clothes). The dryingunit 40 includes a dryingfan 41 above thewater tub 11, a dryingduct 42 connected between anoutlet port 41 b of the dryingfan 41 and anair introduction port 45 formed in an upper side of theopening 14 of thewater tub 11, a condensingduct 43 mounted at a rear of thewater tub 11 such that the condensingduct 43 is connected between anair discharge port 46 formed in the rear bottom of thewater tub 11 and aninlet port 41 a of the dryingfan 41, and a dryingheater 44 mounted in the dryingduct 42 to generate high-temperature air, which is supplied into therotary drum 12. - In the upper part of the condensing
duct 43 is mounted aninjection nozzle 47 to inject condensed water (cool water) into the condensingduct 43 such that moisture is condensed and removed during the passage of high-temperature, high-humidity air, generated by drying the laundry, along the condensingduct 43. - The
injection nozzle 47 is connected to thewater supply unit 20, via a condensedwater supply pipe 48 and acondensed water valve 49, such that condensed water is supplied to theinjection nozzle 47. - Consequently, the condensed water, injected from the
injection nozzle 47, flows to a lower part of the condensingduct 43 along an inner surface of the condensingduct 43. As a result, the contact between the condensed water and high-temperature, high-humidity air rising from the lower part of the condensingduct 43 is increased, and therefore the condensing efficiency is improved. - In the lower part of the condensing
duct 43 is formed adischarge port 43a through which the condensed water is discharged, such that the condensed water that is discharged through thedischarge port 43a, is introduced into thedrainage pipe 31 of thedrainage unit 30. In the lower part of the condensingduct 43, adjacent to thedischarge port 43a, is mounted atemperature sensor 50 to detect the temperature of the condensed water injected into the condensingduct 43. - The
temperature sensor 50 controls drying time differently depending upon the temperature of the condensed water to accomplish optimum drying efficiency irrespective of the difference in temperature of the condensed water injected during the condensing process. For example, when the temperature of the condensed water is low, the drying time is decreased in consideration of a fact that when the temperature of the condensed water is low, the condensing efficiency is increased, and thus the drying efficiency is increased. On the other hand, when the temperature of the condensed water is high, the drying time is increased in consideration of a fact that when the temperature of the condensed water is high, the condensing efficiency is decreased, and thus the drying efficiency is decreased. - The washing machine with the drying unit is operated as follows.
- When a user puts laundry in the
rotary drum 12 and operates the washing machine, thewater supply valve 24 of thewater supply unit 20 is opened with the result that water (wash water) is supplied into thewater tub 11 via thewater supply pipe 22 and thedetergent supply unit 18. - After the completion of water supply, the
washing heater 16 is operated to heat the wash water in thewater tub 11 to a temperature necessary to wash the clothing. Therotary drum 12 is rotated in alternating directions by themotor 13. As a result, the laundry is washed by the frictional force between the laundry and the rotary drum and a dissolving force of the detergent. - After the completion of the washing, a rinsing operation based on a repetition of spin-drying and the water supply, and a spin-drying operation based on the high-speed rotation of the
rotary drum 12 are performed. - Subsequently, a drying operation is performed. When the drying
heater 44 and the dryingfan 41 are operated, during the drying operation, while therotary drum 12 is rotated slowly by themotor 13, air in therotary drum 12 is introduced to the dryingfan 41 through the condensingduct 43, and is discharged into therotary drum 12 through the dryingduct 42. This circulation of the air is repeated. - At this time, the air in the drying
duct 42 is heated by the dryingheater 44. The high-temperature dry air is introduced into therotary drum 12, and the laundry in therotary drum 12 is heated by the high-temperature dry air (hot air) with the result that moisture contained in the laundry is evaporated, and therefore the laundry is dried. - During the drying operation, the high-temperature dry air absorbs the moisture from the wet laundry, and therefore, the high-temperature dry air is changed into high-temperature, high-humidity air. The high-temperature, high-humidity air is transferred to the condensing
duct 43, where the high-temperature, high-humidity air is brought into contact with condensed air (cool air) injected through theinjection nozzle 47. As a result, the high-temperature, high-humidity air is condensed and thus changed into dry air. The dry air is reheated by the dryingheater 44 and introduced into the rotary drum. The above procedure is repeated to dry the laundry. -
FIG. 2 is a control block diagram of the washing machine with the drying unit according to the present embodiment. In addition to the components shown inFIG. 1 , the washing machine further includes asignal input unit 100, a waterlevel detection unit 110, adryness detection unit 120, acontrol unit 130, and adrive unit 140. - The
signal input unit 100 inputs operation information, such as a washing course, a washing temperature, spin-drying RPM, and the addition of rinsing, which are selected by a user, to thecontrol unit 130. Specifically, thesignal input unit 100 selects and inputs a single drying course to perform only a drying operation or a post-operation drying course to perform a drying operation after the completion of spin-drying in connection with a washing operation to thecontrol unit 130. - The water
level detection unit 110 detects the water level of water supplied into thewater tub 11, and thedryness detection unit 120 detects the temperature and humidity of the laundry to confirm the dryness of the laundry. - The
control unit 130 is a microcomputer, for example, to control the washing machine based on the operation information inputted from thesignal input unit 100. When the single drying course or the post-operation drying course is selected, thecontrol unit 130 controls the dryingunit 40 to dry the laundry. Specifically, thecontrol unit 130 controls differently the drying time based on the temperature of condensed water injected during the drying operation. - The
drive unit 140 drives themotor 13, thewashing heater 16, thewater supply valve 24, thedrainage pump 32, the dryingfan 41, the dryingheater 44, and thecondensed water valve 49 according to a drive control signal of thecontrol unit 130. - Hereinafter, the operation of the washing machine with the above-stated construction and a drying control method of the washing machine will be described.
-
FIG. 3 is a flow chart illustrating a drying control method of the washing machine with the drying unit according to the present embodiment. The drying control method according to the present embodiment is applicable to any courses to perform a drying operation, including a single drying course to perform only a drying operation and a post-operation continuous drying course to perform a drying operation after the completion of spin-drying in connection with a washing operation. - When a user selects a single drying course or a post-operation continuous drying course to dry wet laundry (clothes) received in the
rotary drum 12, the operation information selected by the user is inputted to thecontrol unit 130 through thesignal input unit 100. - Subsequently, the
control unit 130 determines whether the selected operation is a drying operation based on the operation information inputted from the signal input unit 100 (200). - When the selected operation is the drying operation, the
control unit 130 controls thecondensed water valve 49 to supply condensed water (cool water) necessary to dry the laundry. As a result, normal tap water (cool water) is supplied to theinjection nozzle 47 through the condensedwater supply pipe 48 and is injected into the condensingduct 43 through the injection nozzle 47 (202). If the selected operation is not the drying operation, the procedure returns tooperation 200. - Then, the temperature of the condensed water injected into the condensing
duct 43 is detected by the temperature sensor mounted in the condensingduct 43, and the detected temperature is inputted to the control unit 130 (204). - The condensed water injected into the condensing
duct 43 is tap water (cool water) for domestic use. The temperature of the tap water may be changed due to seasonal or other environmental causes. For example, the tap water has a temperature distribution including a highest temperature of 30° in summer and a lowest temperature of 5° in winter. In foreign countries, especially some Middle Eastem areas, the temperature of tap water often exceeds 45°. - Subsequently, the
control unit 130 detects the weight of laundry (clothes) to be dried (206), and searches for a drying time corresponding to the detected weight of the laundry using a table showing drying time based on the weight of laundry to be dried as shown inFIG. 4 (208). -
FIG. 4 is a table showing drying times based on the weight of laundry to be dried. For example, when the weight of laundry to be dried is 2 to 3 kg, the drying time is set to be 90 minutes. When the weight of laundry to be dried is 3 to 5 kg, the drying time is set to be 120 minutes. - Subsequently, the
control unit 130 adjusts the drying time corresponding to the detected temperature of the condensed water by adding or subtracting the drying time searched fromFIG. 4 using a table showing an adjustment of drying times based on the temperature of condensed water as shown inFIG. 4 (210). - The addition and subtraction of the drying time are accomplished by decreasing the drying time when the temperature of the condensed water is lower than a predetermined temperature range (approximately 15.1 to 25°), and increasing the drying time when the temperature of the condensed water is higher than the predetermined temperature range.
-
FIG. 5 is a table showing an adjustment of a drying time based on the temperature of condensed water when the weight of laundry to be dried is 3 kg. For example, when the temperature of the condensed water is 0 to 15°, the drying time is subtracted by 5 minutes. - When the temperature of the condensed water is 25.1 to 35°, the drying time is added by 10 minutes.
- This is to adjust the drying time based on the temperature of condensed water in consideration of a fact that the drying efficiency is increased when the temperature of the condensed water is low, and the drying efficiency is decreased when the temperature of the condensed water is high.
- Consequently, the
control unit 130 controls themotor 13 to slowly rotate therotary drum 12 such that the laundry is dried during the drying time that is adjusted based on the temperature of the condensed water. At this time, the dryingheater 44 and the dryingfan 41 are operated such that air in therotary drum 12 is introduced to the dryingfan 41 through the condensingduct 43, and is discharged into therotary drum 12 through the dryingduct 42. This circulation of the air is repeated. - At this time, the air in the drying
duct 42 is heated by the dryingheater 44. The high-temperature dry air is introduced into therotary drum 12, and the laundry in therotary drum 12 is heated by the high-temperature dry air (hot air) with the result that moisture contained in the laundry is evaporated, and therefore, the laundry is dried. - During the drying operation, the high-temperature dry air absorbs the moisture from the wet laundry, and therefore, the high-temperature dry air is changed into high-temperature, high-humidity air. The high-temperature, high-humidity air is transferred to the condensing
duct 43, where the high-temperature, high-humidity air is brought into contact with condensed air (cool air) injected through theinjection nozzle 47. As a result, the high-temperature, high-humidity air is condensed and thus changed into dry air. The dry air is reheated by the dryingheater 44 and introduced into the rotary drum. The above procedure is repeated to dry the laundry (212). -
FIG. 6 is an experimental data table showing dryness and drying time changed depending upon the temperature of condensed water when the weight of laundry to be dried is 2957.6 g (approximately 3 kg). It can be seen fromFIG. 6 that the dryness is lowered and the drying time is increased with the increase of the temperature of the condensed water. - Turning back to
Fig. 3 , thecontrol unit 130 counts the drying time, during the drying operation, to determine whether a predetermined drying time has elapsed (214). When the predetermined drying time has not elapsed, the procedure returns to 212 to continuously perform the drying operation. - When it is determined at 214 that the predetermined drying time has elapsed, the
control unit 130 stops the dryingheater 44, the dryingfan 41, and themotor 13 to interrupt the drying operation (216). - As apparent from the above description, the washing machine with the drying unit according to the present embodiment and the drying control method of the same have the effect of controlling drying time based on the temperature of condensed water used during the drying operation to accomplish optimum drying efficiency, thereby increasing consumers' satisfaction.
Claims (10)
- A drying control method of a washing machine with a drying unit (40) to dry laundry, wherein the drying control method is characterized by
detecting a temperature of condensed water via a condensing duct (43) supplied during the drying of the laundry;
detecting a weight of laundry to be dried;
searching a drying time of a plurality of drying times corresponding to the detected weight of the laundry;
adjusting the searched drying time based on the detected temperature of the condensed water; and
operating the drying unit (40) according to the adjusted drying time to perform a drying operation. - The drying control method according to claim 1, wherein detecting the temperature of the condensed water includes detecting the temperature of cool water supplied from tap water to remove moisture contained in the laundry from the air.
- The drying control method according to claim 1 or 2, wherein the step of adjusting the drying time includes decreasing the drying time when the temperature of the condensed water is lower than a reference temperature range, and increasing the drying time when the detected temperature of the condensed water is higher than the reference temperature range.
- The drying control method according to claim 3, wherein the reference temperature range is approximately 15.1 to 25°C.
- A washing machine, comprising:a rotary drum (12) receiving laundry to be dried;a drying unit (40) supplying hot air into the rotary drum (12) such that the laundry is dried;a drying duct (42) guiding the hot air to the rotary drum (12);a valve (49) controlling a supply of condensed water to a condensing duct (43) during drying of the laundry;a temperature sensor (50) detecting a temperature of the condensed water obtained by cool water supplied from tap water; anda control unit (130) controlling the valve (49) to supply the condensed water to the condensing duct (43), wherein the control unit (130) is adapted to detect a weight of laundry to be dried to search a drying time correponding to the detected weight of the laundry, to adjust the searched drying time based on the temperature of the condensed water detected by the temperature sensor (50), and to operate the drying unit (40) according to the adjusted drying time to perform a drying operation.
- The washing machine according to claim 5, wherein the drying unit (40) includes a heater (44) generating hot air and a fan (41) supplying the hot air into the rotary drum (12).
- The washing machine according to claim 5 or 6, wherein the hot air supplied into the rotary drum (12) is changed into high-temperature, high-humidity air due to moisture contained in the laundry, and the high-temperature, high-humidity air is guided to the drying unit (40) through the condensing duct (43).
- The washing machine according to one of the claims 5 to 7, wherein the temperature sensor (50) detects the temperature of the condensed water supplied to the condensing duct (43) to remove moisture contained in the laundry from the air.
- The washing machine according to one of the claims 5 to 8, wherein the control unit (130) compares the temperature of the condensed water with a predetermined reference temperature range and decreases the drying time when the temperature of the condensed water is lower than the reference temperature range, and increases the drying time when the temperature of the condensed water is higher than the reference temperature range.
- The washing machine according to claim 9, wherein the reference temperature range is approximately 15.1 to 25°C.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020070022211A KR101366561B1 (en) | 2007-03-06 | 2007-03-06 | Washing machine and dry control method thereof |
Publications (3)
Publication Number | Publication Date |
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EP1967633A2 EP1967633A2 (en) | 2008-09-10 |
EP1967633A3 EP1967633A3 (en) | 2009-12-30 |
EP1967633B1 true EP1967633B1 (en) | 2014-03-05 |
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EP07123822.4A Expired - Fee Related EP1967633B1 (en) | 2007-03-06 | 2007-12-20 | Washing machine detecting condensed water temperature and drying control method of the same |
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US (1) | US20080216517A1 (en) |
EP (1) | EP1967633B1 (en) |
KR (1) | KR101366561B1 (en) |
Families Citing this family (9)
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KR101821195B1 (en) * | 2009-08-11 | 2018-01-23 | 엘지전자 주식회사 | laundry dryer and control method of the same |
BR112012014523B1 (en) * | 2009-12-16 | 2020-02-11 | Electrolux Home Products Corporation N.V. | WASHING MACHINE |
KR101294677B1 (en) * | 2010-08-10 | 2013-08-08 | 황혜자 | Washing machine having drying system |
CN104805664B (en) * | 2015-04-27 | 2019-03-22 | 无锡小天鹅股份有限公司 | Washing-drying integral machine and its drying control method |
CN107541919B (en) * | 2016-06-27 | 2020-05-22 | 青岛海尔滚筒洗衣机有限公司 | Method for adjusting quantity of condensing medium according to temperature change of air discharged from dryer |
CN108118503A (en) * | 2016-11-30 | 2018-06-05 | 博西华电器(江苏)有限公司 | Dryer |
CN109440421B (en) * | 2018-12-17 | 2021-09-21 | 无锡小天鹅电器有限公司 | Clothes dryer and water quantity detection method and device of water box of clothes dryer |
EP3795738B1 (en) * | 2019-09-18 | 2022-08-17 | The Procter & Gamble Company | Combination washing and drying apparatuses including cooled water condensers |
KR20230115116A (en) * | 2022-01-26 | 2023-08-02 | 삼성전자주식회사 | Clothes dryer and method for controlling the same |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH07328290A (en) * | 1994-06-09 | 1995-12-19 | Matsushita Electric Ind Co Ltd | Clothing drying machine |
JP3346993B2 (en) | 1996-09-13 | 2002-11-18 | 株式会社東芝 | Washing and drying machine |
KR100375095B1 (en) * | 2000-07-15 | 2003-03-08 | 삼성전자주식회사 | dry control method of clothing dryer |
KR100487343B1 (en) * | 2002-11-26 | 2005-05-03 | 엘지전자 주식회사 | Method for automatic controlling drying time of a drum washing machine with dryer |
EP1614976A4 (en) * | 2003-04-02 | 2006-08-02 | Matsushita Electric Ind Co Ltd | Drying device and method of operation therefor |
KR100955484B1 (en) * | 2003-04-30 | 2010-04-30 | 삼성전자주식회사 | Washing Machine And For Drying Control Method |
KR100597740B1 (en) * | 2004-06-24 | 2006-07-07 | 삼성전자주식회사 | Washing machine |
EP1657341A3 (en) | 2004-11-12 | 2006-08-23 | LG Electronics Inc. | Method and apparatus for control of drying process in a washing and drying machine |
KR20060097210A (en) | 2005-03-04 | 2006-09-14 | 삼성전자주식회사 | Washing machine and method to remove suds thereof |
-
2007
- 2007-03-06 KR KR1020070022211A patent/KR101366561B1/en not_active IP Right Cessation
- 2007-12-11 US US12/000,333 patent/US20080216517A1/en not_active Abandoned
- 2007-12-20 EP EP07123822.4A patent/EP1967633B1/en not_active Expired - Fee Related
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KR101366561B1 (en) | 2014-02-25 |
KR20080081755A (en) | 2008-09-10 |
US20080216517A1 (en) | 2008-09-11 |
EP1967633A3 (en) | 2009-12-30 |
EP1967633A2 (en) | 2008-09-10 |
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