JP2013180162A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clothing treatment apparatus in which a drying operation can be terminated at a predetermined drying rate regardless of the cloth quality.SOLUTION: The clothing treatment apparatus comprises: a rotary drum 4 formed in a bottomed cylindrical shape; a motor 6 rotationally driving the rotary drum 4; heating means 62 heating air from the rotary drum 4; blowing means 12 blowing air from the rotary drum 4 into the rotary drum 4 again via a circulation air path 61; a plurality of temperature detection means 63 detecting a temperature of the circulation air; time setting means 22c setting a period during which a drying step is performed; and control means 22 calculating a temperature difference from the temperatures detected by the plurality of temperature detection means 63. When a predetermined time shorter than the set period set by the time setting means 22c has passed after starting drying, the control means 22 terminates the drying step when detecting that the temperature difference by the temperature detection means 63 has reached a predetermined temperature difference or lower.

Description

  The present invention relates to a clothing processing apparatus that finishes drying while the laundry is undried.

  Some conventional dryers determine the end of drying based on temperature differences between a plurality of temperature detection means (see, for example, Patent Document 1).

  The dryer of patent document 1 is provided with the water tank which accommodates a drum rotatably, the hot air circulation path | route which circulates a hot air in a water tank, and the heat exchanger distribute | arranged in the middle of the hot air circulation path | route. The hot air circulation path is provided with a first thermistor that detects the temperature of the hot air and a second thermistor that detects the temperature after heat exchange of the cooling water supplied to the heat exchanger. The drying control unit detects the end of drying based on the temperature difference between the first and second thermistors. The drying control unit detects a period from the start of drying to the constant rate drying period from the temperature difference between the first and second thermistors.

JP 7-47195 A

  However, when all the laundry is dried with a dryer, there is a problem that wrinkles increase. Therefore, it is conceivable to set the time shorter than the time to completely dry and finish the drying, but there is a problem that the clothes are completely dried when the amount of cloth is small or clothes that are easy to dry. .

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a clothing processing apparatus that can finish drying at a predetermined dryness regardless of the quality of the laundry and the amount of cloth. .

  In order to solve the above-described conventional problems, a clothing processing apparatus according to the present invention includes a rotating drum formed in a bottomed cylindrical shape, a motor for rotating the rotating drum, and heating for heating air from the rotating drum. Means, air blowing means for blowing the air from the rotating drum again into the rotating drum via the circulation air passage, a plurality of temperature detecting means for detecting the temperature of the circulating air, and the time for performing the drying step And a control means for calculating a temperature difference from temperatures by the plurality of temperature detection means, the control means at a stage earlier than the set time by the time setting means. When it is detected that the temperature difference by the detecting means is equal to or less than a predetermined temperature difference, the drying process is terminated.

  Drying is terminated when it is detected that the temperature difference has become less than or equal to the specified temperature difference at an earlier stage than the set time. Can be dried.

  The drum type washing machine of the present invention can provide a clothing processing apparatus that can finish the drying operation at a predetermined drying rate regardless of the cloth quality and the amount of cloth, and has the same dryness.

Sectional drawing which shows schematic structure of the drum type washing machine in Embodiment 1 of this invention Block diagram of the drum type washing machine Flow chart showing washing process and first rinsing process of the drum type washing machine Flow chart showing the second rinsing process of the drum type washing machine Flow chart showing dehydration process of the drum type washing machine The figure showing the amount of water and dehydration time by each cloth quality pattern after the cloth quality judgment result of the drum type washing machine The graph which shows the 2 step | paragraph threshold value of the cloth quality determination of the drum type washing machine Sectional drawing which shows schematic structure of the dryer of the drum type washing-drying machine in Embodiment 2 of this invention Block diagram of the drum-type washer / dryer Flow chart showing the drying process of the drum type washing and drying machine Block circuit diagram of a drum type washing and drying machine in Embodiment 3 of the present invention Flow chart showing the drying process of the drum type washing and drying machine

  According to a first aspect of the present invention, there is provided a clothing processing apparatus, comprising: a rotating drum formed in a bottomed cylindrical shape; a motor that rotationally drives the rotating drum; a heating unit that heats air from the rotating drum; Air blowing means for blowing air into the rotating drum again via the circulation air passage, a plurality of temperature detecting means for detecting the temperature of the circulating air, and a time setting means for setting the time for performing the drying process; Control means for calculating a temperature difference from temperatures by the plurality of temperature detection means, and the control means has a predetermined temperature difference by the plurality of temperature detection means at a stage earlier than a set time by the time setting means. When it is detected that the temperature difference is less than or equal to the temperature difference, the drying process is terminated.

  When it is detected that the temperature difference has fallen below the specified temperature difference at an earlier stage than the set time, the drying process is completed. Drying can be completed at a dryness of. Therefore, a user-desired drying operation can be performed regardless of the cloth quality.

  According to a second aspect of the present invention, the control means of the garment processing apparatus of the first aspect of the present invention further comprises a cloth quality determining means, and the control is performed when the cloth quality determining means determines that clothes with low water content are higher than a predetermined ratio. The means shortens the set time.

  Thus, the laundry can be finished with a predetermined dryness with higher accuracy according to the cloth quality.

  In a third aspect of the invention, the control means of the garment processing apparatus of the first or second aspect of the invention further comprises a cloth quality determination means, and the cloth quality determination means determines that clothes with low water content are higher than a predetermined ratio. The control means shortens the set time.

  Thus, the laundry can be finished with a predetermined dryness with higher accuracy according to the cloth quality.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the present invention is not limited by this embodiment, and can be implemented with appropriate modifications within a range not departing from the gist.

(Embodiment 1)
1 is a cross-sectional view showing a schematic structure of a drum-type washing machine according to Embodiment 1 of the present invention. In addition, the washing water in this Embodiment includes both the washing water containing the detergent component in a washing process, and the rinse water in a rinse process.

  The configuration will be described below with reference to FIG.

  A water tub 3 is housed in the washing machine body 2 so as to be swingable. A rotating drum 4 is disposed in the water tub 3 so as to be rotatable around a rotation shaft 4a. The rotating shaft 4 a of the rotating drum 4 is directly connected to a motor 6 attached to the outside of the back surface of the water tank 3, and the rotating drum 4 is driven to rotate by this motor 6.

  The rotating drum 4 is provided with a plurality of through-holes 4e over the entire wall surface so that water can be passed and vented between the water tank 3 and the rotating drum 4. A plurality of stirring protrusions 4 b are provided on the inner surface of the wall surface of the rotating drum 4, and the laundry in the rotating drum 4 is lifted by the rotation of the rotating drum 4. Although the through hole 4e is provided over the entire wall surface 4c of the rotating drum 4, it may be partially formed on the wall surface 4c of the rotating drum 4. In short, the air permeability between the water tank 3 and the rotating drum 4 is essential. In addition, it should be set so that water permeability can be ensured and washing does not hinder drying.

  The rotating shaft 4a of the rotating drum 4 is inclined so as to face downward from the opening front side toward the back side as the bottom. Specifically, it is arranged to be inclined downward, for example, 20 ± 10 degrees from the horizontal direction. By tilting the rotary shaft 4a in this way, the opening 13 on the front side of the aquarium 3 can be arranged on the upper side, and the user can pass through the opening 13 of the aquarium 3 without taking a posture of bending greatly. The laundry in the rotating drum 4 can be taken out. Compared with the case where the rotating shaft 4a is set in the horizontal direction, the water supplied into the water tank 3 accumulates on the back side, and a deep water storage state can be obtained even with a small amount of water. In order to efficiently supply water to the laundry in the rotating drum 4, the water tank 3 is provided along the vicinity thereof with the same inclination as the rotating drum 4. If the amount of water supply is not taken into consideration, the rotating drum 4 may be horizontal or the inclination angle θ may be less than 10 degrees.

  A water supply unit 7 having a water supply valve 7a and a detergent container 7b is provided at the upper part of the water tank 3. Water is supplied from the outside of the washing machine by opening and closing the water supply valve 7a. The supplied water is supplied into the water tank 3 together with the detergent in the detergent container 7b through the water supply path.

  In the lower part of the water tank 3, a drainage pipe 8 a having one end connected to the bottom of the water tank 3 and a drainage system 8 having a drainage valve 19 are provided. By opening and closing the drain valve 19, water in the water tank 3 is drained through the drain pipe 8a when necessary, such as at the end of the washing process or at the end of the rinsing process. Further, a drainage filter 8b that is removable from the outside of the washing machine main body 2 is disposed on the downstream side of the drainage pipe 8a, and collects yarn waste contained in the drainage. The drainage system 8 is connected to the lower part of the water tank 3 through a drain pipe 8a connected to the lower part of the water tank 3, as shown by a one-dot chain line at the end of the washing process or the end of the rinsing process by opening and closing the drain valve 19. After being collected and passed through a drainage filter 8b that can be removed from the outside, drainage can be performed.

  The drying unit 9 circulates the air in the water tank 3 and the rotating drum 4 by the blower 12 as indicated by the broken line arrows in FIG. In the drying unit 9, a filter (not shown) for collecting and removing dust from the yarns, a dehumidifying part (not shown) for dehumidifying the introduced air after dust removal, and a high temperature that is depleted by heating the air after dehumidification It has a heating part (not shown) etc. used as air.

Further, the drum type washing machine according to the present embodiment is provided with a water level detection means 10 for detecting the amount of water supplied into the rotary drum 4. In this case, an air trap part and a pressure detection part arranged at a predetermined position near the lowest part of the water tank 3 are connected by a hose. The pressure detector is composed of a ferrite integrated with the bellows part that moves by pressure and a fixed coil that surrounds the outer periphery of the ferrite, and converts the moving stroke distance into the trap internal pressure using the change in inductance. . The water level detecting means 10 is in an open state when the cleaning water does not enter the air trap part, and the output is constant. As described above, the water level detection means 10 is generally sensing by air internal pressure measurement by an air trap mechanism, and measuring the time until the air internal pressure changes from the stable atmospheric open pressure affects the variation of the water level sensor. It is an appropriate calculation method that is not subject to The output of the water level detection means 10 changes depending on the rotation speed of the rotary drum 4 because the output changes depending on the rotation of the rotary drum 4 during the washing operation, such as whether or not the rotary drum 4 is rotating. Have multiple tables. That is, the water level can be recognized while the rotating drum 4 is stationary or rotating.

  Next, details of the control means 22 will be described with reference to FIG. FIG. 2 is a block circuit diagram of the washing machine according to Embodiment 1 of the present invention. The control means 22 is composed of a microcomputer. The control means 22 has a function of performing at least a washing process, a rinsing process, and a dehydrating process by automatically controlling the motor 6, the water supply valve 7 a, the drain valve 19, the circulation pump 20, and the like according to mode setting and a control program. Further, the control means 22 includes a cloth quality determination means 22a for determining the cloth quality of the laundry and a cloth amount determination means 22b for detecting the cloth amount of the laundry.

  The cloth amount determination for detecting the amount of laundry put into the rotating drum 4 is detected by using a rotation speed detecting means 23 for detecting the rotation speed of the rotating drum 4. Hereinafter, an example of the cloth amount determination will be described.

  First, the motor 6 is rotationally driven. At this time, the rotational speed of the rotating drum 4 is increased to a rotational speed at which the laundry is stuck to the inner side of the rotating drum 4, for example, about 100 to 140 r / min, and then the motor 6 is turned off. Thereby, the inertial rotation of the rotating drum 4 is in a state where the motor 6 is rotated. At this time, the inertial rotational force of the rotating drum 4 gradually decreases due to the friction torque, and the rotating drum 4 eventually stops. The time from the stop of energization to the stop of the rotating drum 4 is long when the amount of laundry is large, and short when the amount of laundry is small. The amount of laundry is detected using the fact that the difference in time required for this stop is proportional to the amount of laundry.

  In addition, the drum type washing machine according to the present embodiment has a system that can manage all input / output control with a timer, including not only instructions for water supply / drainage and driving of the rotating drum 4, but also various sensor outputs such as the water level detection means 10. It is possible to know the time required for each operation and timing.

  In addition, selection of a mode such as an operation course and various functions is performed by inputting from an operation panel 21 provided at the upper front of the washing machine body 2. Based on the input information, the control means 22 displays on the display means 21b on the operation panel 21 to notify the user. At the same time, when the operation start is set by the input setting means 21 a on the operation panel 21, data is input from the water level detection means 10 for detecting the water level in the water tank 3 and the drive is started, and the drain valve 19 The operation of the water supply valve 7a, etc. is controlled to perform operations such as washing, rinsing, dehydration, and drying.

  The operation of the drum type washing machine configured as described above will be described below including the flow of the cloth quality determination control.

  FIG. 3 is a flowchart showing the washing process and the first rinsing process of the drum type washing machine in the first embodiment of the present invention, and FIG. 4 is the second rinsing of the drum type washing machine in the first embodiment of the present invention. FIG. 5 is a flowchart showing the dehydration process of the drum-type washing machine according to Embodiment 1 of the present invention.

  First, the user puts the laundry into the rotating drum 4, starts the washing operation by the input setting means 21a, and starts the washing process. The control means 22 performs the operation of determining the amount of dry cloth before the laundry is wetted by rotating the motor 6 before water supply is started by the water supply valve 7a, that is, before the laundry is wetted. (S1). After determining the cloth amount, the control means 22 starts water supply by the water supply valve 7a (S2), and rotates the motor 4 to rotate the rotating drum 4 (S3). The rotation speed at this time is the number of rotations at which the laundry falls from the upper part of the rotating drum 4, and is about 50 rpm although it depends on the amount of cloth and the size of the rotating drum 4.

  When the washing process is performed for a predetermined time, the first rinsing process is started. In the first rinsing step, first, a draining operation is performed by opening the drain valve 19 (S4). Thereafter, the motor 6 is rotated at a high speed to perform a dehydrating operation (S5). The dehydration at this time is intermediate dehydration to distinguish from the dehydration operation in the dehydration process. Then, the cloth amount determining operation in a state where the laundry is wetted is performed in the same manner as before the laundry is wetted (S6).

  Thereafter, the first cloth quality determination is performed by the cloth quality determination means 22a (S7). The cloth quality determination by the cloth quality determination unit 22a is obtained by using the cloth amount determination result before the laundry contains water and the cloth amount determination result after the laundry contains water. Specifically, the cloth amount determination result before the laundry contains water is divided by the cloth amount determination result after the water content, and the smaller the value, the higher the water content, that is, cotton-based clothing. On the contrary, the higher the ratio of the laundry before and after the moisture content, the less the moisture content, that is, the garment-based clothing.

  The cloth quality is determined by the above method, and the water supply amount in the first rinsing process, which is the next process, is set according to the cloth quality. FIG. 6 is a diagram showing the amount of water and the dewatering time according to each cloth pattern after the cloth quality determination result of the drum type washing machine in the first embodiment of the present invention. As shown in FIG. 6, when the proportion of the synthetic fiber garment having a low water content is 50% or more (YES in S8), the water supply amount V1 in the first rinsing process is Ax (L) ( S9). When the proportion of the synthetic fiber clothing is not 50% or more, that is, when the cotton clothing is 50% or more (NO in S8), the water supply amount V1 in the first rinsing process is set to A (L) (S10). . Water supply is performed based on the water supply amount determined by the cloth quality determination means 22a (S11). Thereafter, the motor 6 is controlled to rotate the rotating drum 4 to perform stirring (S12). When the predetermined time has elapsed, the rotation of the rotary drum 4 is stopped and the first rinsing process is completed.

  When the first rinsing process is completed, the second rinsing process is started. In the second rinsing step, first, a draining operation is performed by opening the drain valve 19 (S13). Thereafter, the motor 6 is rotated at a high speed to perform a dehydrating operation (S14). The dehydration at this time is intermediate dehydration to distinguish from the dehydration operation in the dehydration process.

  After intermediate dehydration, if the proportion of synthetic fiber clothing is 50% or more in the first cloth quality determination, the cloth amount determination operation in a state where the laundry is wet in the same manner as before the laundry is wet Is performed (S16). Thereafter, a second cloth quality determination is performed by the cloth quality determination means 22a (S17). The second cloth quality determination is the same as the first cloth quality determination, but the threshold for determining that the percentage of laundry with low water content is high is higher than that for the first cloth quality determination. Specifically, it is determined whether the synthetic fiber clothing is 85% or more (S18). When the synthetic fiber clothing is 85% or more (YES in S18), the water supply amount V2 in the second rinsing is set to By (L) (S19). If the synthetic clothing is not 85% or more, that is, if the cotton clothing is 85% or more (NO in S18), the water supply amount V2 in the second rinsing is set to B (L) (S20).

  In the first cloth quality determination, if the proportion of the synthetic garment is not 50% or more, that is, if the cotton garment is 50% or more (NO in S15), the cloth amount determination is not performed and the water supply amount V2 Is B (L) (S21).

  When supplying the water supply amount V2 determined by the second cloth quality determination (S22), the control means 22 drives the motor 6 to rotate the rotating drum 4 and performs stirring (S23). When the predetermined time has elapsed, the rotation of the rotating drum 4 is stopped and the second rinsing process is completed.

  When the second rinsing step is completed, the dehydration step is started. The dehydration operation at this time is the final dehydration to distinguish from the intermediate dehydration. First, a draining operation is performed by opening the drain valve 19 (S24).

  If the ratio of the synthetic fiber clothing is 85% based on the second cloth quality detection result (YES in S25), the dewatering time ta in the final dewatering step is set to t1-v1 (min) (S26). If the proportion of the synthetic garment is not 85% (NO in S25), the first cloth quality detection result determines whether the proportion of the synthetic garment is 85% (S27). When the proportion of the synthetic fiber clothing is 50% (YES in S27), the dewatering time ta in the final dewatering step is set to t1-u1 (min) (S28). When the proportion of the synthetic fiber clothing is not 85% (NO in S27), the dewatering time ta in the final dewatering step is set to t1 (min) (S29).

  The control means 22 drives the motor 6 to perform a final dehydration operation (S30), and when the dehydration time ta has elapsed (YES in S31), the washing is terminated.

  As described above, a pattern is provided depending on the type of clothing, and the amount of water supply at the time of rinsing and the time of the final dewatering operation are changed. The effects will be described in detail below with reference to FIGS.

  FIG. 7 is a graph showing the two-stage threshold value for the cloth quality determination of the drum type washing machine in the first embodiment of the present invention. Although it is possible to classify into three ranks in one cloth quality determination, an error in cloth quality determination becomes large. Therefore, in the present embodiment, the cloth quality determination is divided into two times, and the threshold values for the cloth quality determination in the first cloth quality determination and the second cloth quality determination are set to be different.

  In detail, when the synthetic fiber clothing is 50% or more in the first cloth quality determination, the second cloth quality determination is performed again. Further, in the second cloth quality determination, the threshold value is set higher than that in the first cloth quality determination, so that it is possible to accurately determine the case where the synthetic fiber garment and the cotton garment are considered to be difficult to determine the cloth quality. be able to. This is the case, for example, where the proportion of synthetic fiber clothing is included at a rate close to the threshold.

  Consider a case where 40% of the laundry is synthetic fiber clothing. Due to an error in cloth quality determination, it may be determined in the first cloth quality determination that the synthetic fiber clothing is 50% or more (corresponding to pattern 2 in FIG. 6). At this time, the amount of water used for the first rinse is xL less than when the cotton-based clothing is 100%. When the threshold is determined as 85% in the second cloth quality determination, the probability that it is actually determined to be 85% or more is greater than the threshold of 50% with respect to the laundry in which the synthetic clothing is 40%. Lower than in some cases. In the cloth quality detection method in which the cloth quality determination is performed twice with the same threshold value, when the ratio of the synthetic fiber is 40% and the threshold value is 50%, there is a possibility that both are detected as 50% or more. However, as in the present invention, the cloth quality determination is performed twice and the reference threshold value in each cloth quality determination is set to a different value, whereby the error can be supplemented.

  Based on the cloth quality determination results as described above, the processes after the cloth quality determination are controlled. The water amount control is controlled by the water level detection means 10.

  As shown in FIG. 6, when there are more than half of the cotton clothes included in the laundry, that is, when the first cloth quality determination determines that the cotton clothes are 50% or more ( Pattern 1) A (L) water supply amount in the first rinsing step, B (L) water supply amount in the second rinsing, and t1 (min) dehydration time in the final dehydration operation. In the first cloth quality determination, when it is determined that the synthetic clothing included in the laundry is 50% or more with respect to the entire laundry, it is classified as pattern 2 or pattern 2, and the amount of water in rinse 1 is expressed as x (L )cut back. The clothing set as the pattern 2 is subjected to the second cloth quality determination. At this time, if it is determined that the chemical fiber ratio is 85% or more, pattern 3 is obtained, and if it is determined that it is not 85% or more, pattern 2 is obtained. In the case of Pattern 2, the water supply amount is B (L), but the dehydration time is reduced by u (minutes). In the case of pattern 3, the amount of water for the second time is reduced by y (L), and the dehydration time is further reduced by v (minutes).

  In the case of Pattern 2, the amount of water used in the second rinsing is the same as that in the case where cotton-based clothing is 100%. Therefore, although the water quantity rank of each time of a rinsing process becomes two steps, as a whole, a plurality of rinsing steps are ranked in three steps. Therefore, it is possible to efficiently perform highly accurate cloth quality determination while ensuring both water saving and rinsing performance for those in which the proportion of the synthetic fiber clothing is determined to be 50% or more and less than 85%. .

  As described above, the cloth quality determination is performed in two stages to distinguish the three patterns of cloth texture, and the control program instructs the amount of water suitable for the three patterns of clothing to reduce the amount of water used while ensuring rinsing performance. Thus, water-saving operation suitable for the actual fabric quality can be performed. In addition, the dewatering performance can be ensured even if the time is shortened according to the pattern of the cloth quality.

  Although the case where the rinsing operation is performed a plurality of times has been described, the present invention is not limited to this, and when the rinsing operation is performed once, the cloth quality detection result in the cloth peeling process after the dehydration operation in the final dehydration process or the drying process May be applied. In addition, when the rinsing operation is performed three times or more, the cloth quality may be detected three or more times. Furthermore, in pattern 2, the amount of water supplied in the second rinsing step is the same as in pattern 1, but it may be greater than the amount of water supplied in the first rinsing step in pattern 2. That is, it is good also as supplying water more than Ax (L).

(Embodiment 2)
In the present embodiment, the drying unit includes a heater and a water-cooled heat exchanger. Furthermore, the clothing processing apparatus in the present embodiment is provided with a room drying course that finishes drying while the laundry is in an undried state. The configuration of the washing machine other than the drying unit and the washing process are the same as those in the first embodiment.

  FIG. 8 is a cross-sectional view showing a schematic structure of the dryer of the drum type laundry dryer in the second embodiment of the present invention, FIG. 9 is a block circuit diagram of the drum type laundry dryer in the second embodiment of the present invention, FIG. 10 is a flowchart showing a drying process of the drum type laundry dryer in the second embodiment of the present invention.

  The heat exchanger 40 is connected to the lower part of the bottom wall of the water tank 3. Therefore, the dehumidified water supplied from the water supply unit 7 to the heat exchanger 40 finally flows into the water tank 3. When the drain valve 19 is opened, the dehumidified water used to dehumidify the dry air is also discharged out of the housing through the drain port 18.

  A circulation system 60 that circulates dry air for drying the clothes in the rotating drum 4 is further provided. In addition to the heat exchanger 40 described above, the circulation system 60 includes a blower 12 that allows dry air to flow into the water tank 3, a circulation air path 61 that defines a flow path of the dry air from the blower 12 to the water tank 3, and the blower 12. And a heater 62 that heats dry air from the water tank 3 toward the water tank 3.

As shown in FIGS. 8 and 8, the circulation air passage 61 is connected to the peripheral wall of the water tank 3 in the vicinity of the opening 13. When the blower 12 is activated, dry air flows into the water tank 3 through the circulation air passage 61. Since the heater 62 heats the dry air flowing from the blower 12 toward the water tank 3 and the rotating drum 4, relatively high-temperature dry air is blown onto the clothes in the rotating drum 4. As a result, moisture evaporates from the clothing.

  The dry air containing the evaporated water then flows into the heat exchanger 40 connected to the bottom wall of the water tank 3. As described above, since the dehumidified water supplied from the water supply unit 7 flows into the heat exchanger 40, the dry air that has flowed into the heat exchanger 40 is dehumidified. In this embodiment, the heat exchanger 40 is illustrated as a dehumidification element.

  Further, a temperature sensor 63 for measuring the dryness of the clothes in the water tank 3 and the rotating drum 4 is provided in the circulation system 60. The temperature sensor 63 includes a first temperature sensor 63 a disposed immediately before the heater 62 and a first temperature sensor 63 a disposed immediately after the heater 62. The first temperature sensor 63a measures the temperature of the dry air before the clothing is dried.

  The control means 22 calculates the temperature difference of the drying air from the signals of the two temperature sensors 63. Based on the calculation result, the heater 62 and the rotating drum 4 are controlled.

  In the above configuration, the drying process when the room drying course is selected will be described below with reference to FIG. The room drying course is a course that finishes drying while the laundry is in an undried state. As an undried state, the present embodiment will be described assuming that the drying rate is 90%.

  When the drying process is started after the washing process is finished, the control unit 22 drives the blower 12 and the motor 6 and operates the heater 62 to start heating the drying air (S32). At this time, the rotating direction of the rotating drum 4 rotates forward and backward every predetermined time so that the laundry does not get entangled, and the drying air is applied to the whole. Moreover, the time setting means 22c measures the initial temperature before operating the heater 62 by the temperature sensor 63, and sets the drying time according to the initial temperature. For example, if the initial temperature is lower than 10 ° C., the laundry is difficult to dry, and the temperature of the drying air is difficult to increase, so the drying time is lengthened. If the initial temperature is higher than 10 ° C., the clothes are easy to dry and the temperature of the drying air is likely to rise, so the drying time is shortened. In the present embodiment, when the initial temperature is 10 ° C. or higher, the drying time is 35 minutes, and when the initial temperature is less than 10 ° C., the drying time is 45 minutes. Hereinafter, the case where initial temperature is 10 degree | times or more is demonstrated.

  When a time shorter than the set time, for example, 20 minutes has elapsed after the start of drying, the control means 22 confirms whether the temperature difference between the first temperature sensor 63a and the second temperature sensor 63b is 10 degrees or more (S34). ). If the temperature difference is 10 degrees or more (YES in S34), it is determined that the laundry drying rate is less than 90%, and the operation of the heater 62 is continued until the set time (S35). The operation is stopped (S36). If the temperature difference is less than 10 degrees (NO in S34), it is determined that the dryness has reached 90%, and the operation of the heater 62 is stopped (S36).

  Even after the heater 62 is stopped, since the air temperature in the water tank 3 is high, the blower 12 is continuously driven (S37). After this blowing process is performed for a predetermined time, for example, 15 minutes, the driving of the blower 12 is stopped and the drying process is ended.

In this way, when the predetermined time within the set time has elapsed after the start of drying, if the temperature difference of the drying air is equal to or less than the predetermined temperature difference, the drying is terminated before the set time elapses. Thus, the laundry can be finished to a predetermined dryness. This is particularly useful when a large amount of synthetic garment is included, or when the amount of fabric is small. That is, synthetic fiber clothing has a low water content and a low water content. Furthermore, it is easy to dry because it is highly dehydrated. On the other hand, cotton-based clothing retains a large amount of water and has low dewaterability. In order to finish drying with a similar drying rate of 90%, clothing with different water content and dewaterability is provided with a threshold between time and temperature difference, and drying ends when a predetermined temperature difference is reached before the set time. I have to. Furthermore, when the amount of cloth is small, the total moisture content contained in the clothing is small, so that drying is likely to end quickly. This is the same regardless of whether the fabric is synthetic fiber or cotton. For this reason, a threshold is provided for the time and the temperature difference, and the drying is finished when a predetermined temperature difference is reached before the set time.

  As a result, even when there are many synthetic fiber clothes that are easy to dry, or when the amount of fabric is small and the drying is fast, the drying can be completed with a dryness of 90%. The user can perform a desired drying operation without being fixed.

  In addition, in this Embodiment, although demonstrated as a drum type washing-drying machine, the vertical type washing-drying machine with a substantially perpendicular | vertical rotating shaft may be sufficient. Moreover, the dryer without a washing function may be sufficient.

(Embodiment 3)
In the present embodiment, the control means shortens the time for judging whether the temperature difference is equal to or less than the predetermined temperature difference when the cloth quality determining means determines that the clothes having low water content are higher than the predetermined ratio. The configurations of the clothing processing apparatus and the washing process other than that are the same as those in the first and second embodiments. Hereinafter, the drying process when the room drying course is washed will be described in detail.

  FIG. 11 is a block circuit diagram of a drum type laundry dryer in the third embodiment of the present invention, and FIG. 12 is a flowchart showing a drying process of the drum type laundry dryer in the third embodiment of the present invention.

  The control means 22 controls the drying process according to the cloth quality determined by the cloth quality determination means 22a in the washing process.

  When the drying process is started after the washing process is completed, the control means 22 drives the blower 12 and the motor 6 and operates the heater 62 to start heating the drying air (S40). At this time, the rotating direction of the rotating drum 4 rotates forward and backward every predetermined time so that the laundry does not get entangled, and the drying air is applied to the whole. Moreover, the time setting means 22c measures the initial temperature before operating the heater 62 by the temperature sensor 63, and sets the drying time according to the initial temperature. For example, if the initial temperature is lower than 10 ° C., the laundry is difficult to dry, and the temperature of the drying air is difficult to increase, so the drying time is lengthened. If the initial temperature is higher than 10 ° C., the clothes are easy to dry and the temperature of the drying air is likely to rise, so the drying time is shortened. In the present embodiment, when the initial temperature is 10 ° C. or higher, the drying time is 35 minutes, and when the initial temperature is less than 10 ° C., the drying time is 45 minutes. Hereinafter, the case where initial temperature is 10 degree | times or more is demonstrated.

  When the proportion of the laundry determined in the washing process is 85% or more for the synthetic fiber clothing (YES in S41), the predetermined time tb for calculating the temperature difference is set to t2-v2 (minutes). When the synthetic fiber clothing is not 85% (NO in S41) and is 50% or more (YES in S43), the predetermined time tb is set to t2-u2 (minutes). At this time, v2> u2. When the synthetic fiber clothing is not 50% or more (NO in S43), the predetermined time tb is set to t2 (minutes).

After elapse of a predetermined time shorter than the set time after the start of drying (YES in S46), the control means 22 confirms whether the temperature difference between the first temperature sensor 63a and the second temperature sensor 63b is 10 degrees or more ( S47). If the temperature difference is 10 degrees or more (YES in S47), it is determined that the laundry drying rate is less than 90%, and the operation of the heater 62 is continued until the set time (S48). The operation is stopped (S49). If the temperature difference is less than 10 degrees (NO in S47), it is determined that the dryness has reached 90%, and the operation of the heater 62 is stopped (S49).

  Even after the heater 62 is stopped, since the air temperature in the water tank 3 is high, the blower 12 is continuously driven (S50). After this blowing process is performed for a predetermined time, for example, 15 minutes, the driving of the blower 12 is stopped and the drying process is ended.

  As described above, after the start of drying, when the predetermined time tb within the set time has elapsed and the temperature difference of the drying air is equal to or less than the predetermined temperature difference, the drying ends before the set time elapses. Thus, the laundry can be finished to a predetermined dryness. Further, since the predetermined time tb is changed according to the cloth quality, the dryness according to the cloth quality can be finished with higher accuracy. This is particularly useful when a lot of synthetic garments are included. That is, synthetic fiber clothing has a low water content and a low water content. Furthermore, it is easy to dry because it is highly dehydrated. On the other hand, cotton-based clothing retains a large amount of water and has low dewaterability. In order to finish drying with a similar drying rate of 90%, clothing with different water content and dewaterability is provided with a threshold between time and temperature difference, and drying ends when a predetermined temperature difference is reached before the set time. I have to. As a result, it is possible to finish drying of the synthetic fiber clothing that is easy to dry at a dryness of 90%, and the user performs a drying operation desired by the user without being completely dried even though the room drying course is selected. be able to.

  In the present embodiment, the predetermined time tb is changed according to the cloth quality, but the drying set time, that is, the time during which the heater 62 is operated may be changed. Further, both the set time and the predetermined time may be changed according to the cloth quality.

  Although the cloth quality determination is described as being determined in the washing process, it may be determined in the drying process, or may be input by the user using the input setting unit 21a.

  In addition, in this Embodiment, although demonstrated as a drum type washing-drying machine, the vertical type washing-drying machine with a substantially perpendicular | vertical rotating shaft may be sufficient. Moreover, the dryer without a washing function may be sufficient.

  As described above, the present invention is effective as a dryer or a laundry dryer that detects the dryness of the laundry and stops drying at a desired dryness even when it contains a large amount of synthetic fiber clothing.

DESCRIPTION OF SYMBOLS 2 Washing machine main body 3 Water tank 4 Rotating drum 4a Rotating shaft 4b Stirring protrusion 4e Through-hole 6 Motor 7 Water supply unit 7a Water supply valve (water supply means)
7b Detergent container 10 Water level detection means 12 Blower (blower means)
DESCRIPTION OF SYMBOLS 13 Opening 16 Circulation system 19 Drain valve 20 Circulation pump 21 Operation panel 22 Control means 22a Cloth quality determination means 22b Cloth quantity determination means 22c Time setting means 23 Rotation speed detection means 61 Circulation air path 62 Heater (heating means)
63 Temperature sensor (temperature detection means)

Claims (3)

A rotating drum formed into a bottomed cylindrical shape;
A motor for rotating the rotating drum;
Heating means for heating air from the rotating drum;
Air blowing means for blowing air from the rotating drum into the rotating drum again via a circulation air path;
A plurality of temperature detection means for detecting the temperature of the circulating air;
Time setting means for setting the time for performing the drying process;
Control means for calculating a temperature difference from the temperature by the plurality of temperature detection means,
When the control means detects that a temperature difference by the plurality of temperature detection means has become a predetermined temperature difference or less when a predetermined time that is earlier than a set time by the time setting means has elapsed since the start of drying, the drying step Finish clothing processing equipment. The control means further comprises a cloth quality determination means,
When the cloth quality determination means determines that the clothes with low water content are higher than a predetermined ratio,
The clothing processing apparatus according to claim 1, wherein the control unit shortens the predetermined time. The control means further comprises a cloth quality determination means,
When the cloth quality determination means determines that the clothes with low water content are higher than a predetermined ratio,
The clothing processing apparatus according to claim 1, wherein the control unit shortens the set time.