JP2011206397A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing and drying machine, capable of performing optimum drying operation control, and achieving energy saving performance.SOLUTION: The washing and drying machine includes a drum 4 rotatably disposed in a water tank 3, having a plurality of holes 4b on a circumferential wall, a drying part 6 to circulate air taken out of the drum through the holes 4b to be dehumidified and heated, and then blown into the drum to dry the washing in the drum, a weight detection part 30 to detect the weight of the washing housed in the drum, and drying operation control means to execute drying operation to rotate the drum 4, actuate the drying part 6, and finish the drying operation based on a result of detection of the weight detection part 30. It also includes comparison means to compare difference between the weight of the washing in the drum when washing is started and the weight of the washing in the drum detected by the weight detection part 30 during the drying operation with a set value, and drying ability adjusting means to decrease drying ability of the drying part 6 when the difference is smaller than the set value based on a result of comparison by the comparison means.

Description

  The present invention relates to a washing / drying machine for washing and dehydrating laundry and then performing a drying operation.

  The laundry dryer includes a circulation drying unit for drying the laundry after dehydration, and the drying unit has a blower, a heating device, a blower duct, and a blower path that also serves as a heat exchanger for dehumidification. ing. When the drying section is operated, the air sent from the blower is heated by the heating device to become warm air, and the warm air is blown from the blow duct into the rotating drum disposed in the water tank, and the laundry stored in the drum It hits. As a result, the moisture contained in the laundry evaporates, and the moist air is sucked out of the drum through a small hole provided in the peripheral wall of the drum, led to the air blowing path also serving as a heat exchanger for dehumidification, and cooled and moistened. Moisture contained in the air condenses. As a result, the humid air is dehumidified to become dry air, which is again warmed by the blower and the heating device and blown out into the drum. Thus, the laundry in the drum is dried by circulating air inside and outside the drum.

  Conventionally, a weight detection unit that detects the weight of the laundry in the drum has been provided, and the end of drying is determined by detecting when the weight change saturation point or weight change rate during the drying operation falls below a predetermined value. A laundry dryer (see Patent Document 1 or Patent Document 3) or a laundry dryer that determines the end of drying based on the degree of dryness calculated based on the weight of the laundry at the start of washing and the weight of the laundry during the drying operation A machine (see Patent Document 2) has been proposed.

JP-A-6-79098 Japanese Patent Laid-Open No. 11-146999 JP 2004-148053 A

  In the latter half of the drying operation, the dryness of the laundry increases as the moisture evaporates. In this case, if the drying is performed with the same drying capacity as in the initial stage of the drying operation, the drying capacity of the laundry becomes excessive. There is a risk of wasting unnecessary energy.

This invention is made | formed in view of the above situations, and it aims at providing the washing-drying machine which performs optimal drying operation control and can implement | achieve energy saving.
Another object of the present invention is to provide a washing / drying machine capable of accurately ending the drying operation at an arbitrary target dryness.

  The washer / dryer according to the present invention is rotatably arranged in the water tank, and the drum having a plurality of holes in the peripheral wall and the air sucked out of the drum through the holes are dehumidified and heated to blow out into the drum. A drying unit that circulates and dries the laundry in the drum, a weight detection unit that detects the weight of the laundry contained in the drum, and a drying operation that rotates the drum and operates the drying unit. A laundry dryer having a drying operation control means for executing and ending the drying operation based on a detection result of the weight detection unit, the weight of the laundry in the drum at the start of washing and the weight detection during the drying operation The comparison means for comparing the difference between the weight of the laundry in the drum detected by the section with a set value and the result of the comparison by the comparison means that the drying capacity of the drying section is reduced when the difference is smaller than the set value. Drying capacity Characterized in that it comprises a settling unit.

  In the present invention, the drum rotatably disposed in the water tank is rotated, and the air sucked out of the drum through a plurality of holes formed in the peripheral wall of the drum is dehumidified and heated so as to blow out into the drum. The weight detection unit detects the weight of the laundry in the drum while performing a drying operation that circulates and dries the laundry in the drum, and the laundry in the drum at the start of washing And the difference between the detected value of the weight of the laundry in the drum during the drying operation with a set value, and as a result of comparison, if the difference is smaller than the set value, the drying capacity of the drying unit is reduced, The drying operation is terminated based on the detection result of the weight of the laundry in the drum during the drying operation.

  The laundry dryer according to the present invention includes an operation unit for inputting information on the target dryness, the weight of the laundry in the drum at the start of washing, and the laundry in the drum detected by the weight detection unit during the drying operation. A dryness calculating means for obtaining the dryness of the laundry based on the weight, and the drying operation control means is configured such that the dryness obtained by the dryness calculating means corresponds to the target dryness or the target dryness It is characterized in that the drying operation is terminated when the temperature reaches the value.

  In the present invention, when the drying operation is executed, based on the weight of the laundry in the drum at the start of washing and the weight of the laundry in the drum detected by the weight detection unit during the drying operation. The dryness of the laundry is obtained, and the drying operation is terminated when the obtained dryness reaches the target dryness input by the operation unit or a reference value corresponding to the target dryness.

The washing / drying machine according to the present invention is characterized in that the drying capacity adjusting means sets the amount of decrease in the drying capacity of the drying section to small / large corresponding to high / low of the target dryness.
In the present invention, when the target dryness is high, by reducing the amount of decrease in the drying capacity of the drying section, it is possible to ensure a high drying capacity and sufficiently dry the laundry, When the target dryness is low, by increasing the amount of decrease in the drying capacity of the drying section, the drying capacity can be lowered and weaker drying can be performed.

The washing / drying machine according to the present invention is characterized in that the drying capacity adjusting means sets the set value to small / large corresponding to high / low of the target dryness.
In the present invention, when the target dryness is high, until the difference between the weight of the laundry in the drum at the start of washing and the detected value of the weight of the laundry in the drum during the drying operation becomes small. Since the drying capacity of the drying section is not lowered, the laundry can be sufficiently dried with a high drying capacity. On the other hand, when the target dryness is low, the drying capacity of the drying unit is large when the difference between the weight of the laundry in the drum at the start of washing and the detected value of the weight of the laundry in the drum during the drying operation is large. Therefore, a weaker drying can be performed with a lower drying capacity.

  The washing / drying machine according to the present invention includes a dehydration operation control unit that performs a dehydration operation for rotating the drum to dehydrate the laundry in the drum based on the set dehydration operation condition, and the weight detection unit after the dehydration operation. And a weight calculating means for calculating the weight of the laundry in the drum at the start of the washing based on the weight of the laundry in the drum detected by the apparatus and the dehydration operation condition.

  In the present invention, the weight detection unit detects the weight of the laundry in the drum after performing the dehydration operation of rotating the drum and dewatering the laundry in the drum based on the set dehydration operation condition. Then, the weight of the laundry in the drum at the start of washing is calculated based on the detected value of the weight of the laundry in the drum and the dehydration operation conditions.

  According to the present invention, when the difference between the weight of the laundry in the drum at the start of washing and the detected value of the weight of the laundry in the drum during the drying operation is larger than the set value, the amount of water in the laundry is Since many laundry items are not sufficiently dried, the drying capacity of the drying section is not lowered. On the other hand, if the difference between the weight of the laundry in the drum at the start of washing and the detected weight of the laundry in the drum during the drying operation is smaller than the set value, the amount of moisture in the laundry is small and Since the drying is progressing, the drying capacity of the drying section is reduced. As a result, optimal drying operation control is performed by preventing excessive drying capacity for laundry that has been dried, and energy saving is achieved by suppressing wasteful energy consumption. A laundry dryer is provided.

  Further, according to the present invention, the dryness of the laundry during the drying operation is accurately determined based on the detected value of the weight of the laundry in the drum at the start of washing and the weight of the laundry in the drum during the drying operation. When the calculated dryness reaches the reference value corresponding to the target dryness input by the operation unit, the dry operation is terminated. Therefore, the dry operation can be accurately terminated at an arbitrary target dryness. A laundry dryer is provided.

It is a schematic perspective view which shows the external appearance of the washing-drying machine which concerns on this invention. It is side surface sectional drawing of the washing-drying machine shown in FIG. It is a control block diagram of the washing and drying machine shown in FIG. It is a flowchart of the operation control of the washing / drying machine which concerns on this invention. 3 is a flowchart illustrating a drying operation according to the first embodiment. 6 is a flowchart showing a drying operation of the second embodiment. It is a graph explaining the spin-drying | dehydration characteristic of the washing-drying machine which concerns on this invention.

Hereinafter, embodiments of the washing and drying machine according to the present invention will be described.
Embodiment 1
FIG. 1 is a schematic perspective view showing an appearance of a washing / drying machine according to the present invention, and FIG. 2 is a side sectional view of the washing / drying machine shown in FIG.
A washing / drying machine (hereinafter referred to as a drum-type washing machine) according to the present invention includes an outer box 1 having an opening 11 on a front surface, and a front lower panel 12 is provided on a lower portion of the front surface of the outer box 1. 1 is provided with a base 13. A door 2 is rotatably attached to the opening 11 of the outer box 1 by a hinge, and the opening 11 is opened and closed by the door 2.

  In the upper part of the outer box 1, there are provided a detergent case 14 for storing a detergent, a bleaching agent and a softening agent, and an operation part 8 having operation keys and a display part. In addition to the power key, the operation start key, and the like, the operation key of the operation unit 8 is also provided with a dryness key for inputting a target dryness of the laundry (for example, three levels of standard, careful, and soft). On the back side of the operation unit 8 (inside the outer box 1), a control unit 7 for controlling the operation of the drum type washing machine is arranged. Further, a step portion 15 lower than the front portion of the top surface is provided at the rear portion of the top surface of the outer box 1.

  The drum-type washing machine includes a bottomed cylindrical water tank 3 disposed in the outer box 1, a bottomed cylindrical drum 4 that is rotatably disposed in the water tank 3 and accommodates laundry, and laundry. A drying system 6 for drying the water tank 2 and two dampers 9 for elastically supporting the rear portion of the water tank 3. A drum motor 5 that rotationally drives the drum 4 is attached to the rear portion of the water tank 3. The damper 9 is provided with a weight detection sensor 30, and the end of the damper 9 opposite to the water tank 3 side is attached to the damper mounting portion 10 a of the damper support fitting 10.

  A water tank opening 3a is provided on the front surface of the water tank 3, and a packing 3b made of an elastic body such as rubber or soft resin is fixed to the opening edge of the water tank opening 3a. As a result, when the door 2 is closed, the door 2 comes into close contact with the packing 3 b and the liquid in the water tank 3 is prevented from leaking out of the water tank 3. The water tank 3 is disposed sideways so that the water tank opening 3a faces the opening 11 of the outer box 1, and more specifically, the central axis of the water tank 3 so that the water tank opening 3a is higher than the rear part of the water tank 3. Is inclined at an angle of 5 ° to 30 ° with respect to the horizontal direction.

  A water supply duct 20 for supplying water, washing liquid or the like into the water tank 3 is connected to the upper part of the water tank 3. A drainage duct 21 is connected to the lower part of the water tank 3 to drain water, washing liquid, and the like in the water tank 3 to the outside. The drain duct 21 is connected to a drain hose 23 via a filter 22. The filter 22 removes the yarn waste in the liquid flowing from the water tank 3. The drain hose 23 is provided with a drain valve 25 that is opened and closed by a drain motor 24.

  The step 15 on the rear side of the outer box 1 is composed of a horizontal surface 15a and a vertical surface 15b, and a water supply port 26 for supplying tap water to the water tank 3 is provided on the horizontal surface 15a. The water supply port 26 is connected to the water supply duct 20 via a water supply valve 27. The tap water supplied from the water supply port 26 via the water supply duct 20 flows into the water tank 3 as it is, or mixes with a detergent or a softener and flows into the water tank 3.

  The drum 4 is arranged so that the central axis is parallel to the central axis of the water tank 3 and is eccentric to the top surface side of the outer case 1. That is, the rotation axis of the drum 4 is inclined so as to form an angle of 5 ° to 30 ° with respect to the horizontal direction, and is positioned on the upper side of the water tank 3 with respect to the central axis of the water tank 3. In other words, in the vertical plane including the rotation axis of the drum 4, the distance between the lower part of the drum 4 and the lower part of the water tank 3 is larger than the distance between the upper part of the drum 4 and the upper part of the water tank 3.

  A drum opening 4 a is provided on the front surface of the drum 4 so as to face the opening 11 of the outer box 1 and the water tank opening 3 a. The drum opening 4a has a larger diameter than the water tank opening 3a. A plurality of small holes 4 b are provided in the entire peripheral wall of the drum 4. The small holes 4 b are for circulating washing water, dry air, and the like between the space between the water tank 3 and the drum 4 and the space in the drum 4.

  Further, a baffle 4 c that protrudes inward in the radial direction is provided on the inner wall surface of the drum 4. This baffle 4c is arrange | positioned at three places at intervals of 120 degrees in the circumferential direction, for example. The baffle 4c functions to repeat the lifting and dropping of the laundry as the drum 4 rotates. Further, a liquid balancer 4d that surrounds the drum opening 4a of the drum 4 is provided, and an imbalance that is likely to occur due to a bias of laundry, washing liquid, or the like when the drum 4 rotates is enclosed in the liquid balancer 4d. It cancels out by moving the liquid.

  The drying system 6 includes a blower 61, a PTC heater 62, a drying filter 64 and a filter storage case 65 provided on the upper surface of the outer box 1, a blower duct 66 that blows out heated and dried air, and the rear surface of the water tank 3. And a dehumidifying heat exchanger and warm air circulation path 63 provided on the side.

  The blower 61 includes a fan case 61a, a rotary blade 61b accommodated in the fan case 61a, and a fan motor 61c that rotationally drives the rotary blade 61b, and is attached to the upper part of the water tank 3 and the outer box 1. . The fan motor 61c is directly connected to the rotary blade 61b and rotationally drives the rotary blade 61b by a direct drive structure.

  The PTC heater 62 is accommodated in the blower 61 and disposed between the fan case 61 a and the blower duct 66, and heats the air blown by the blower 61. The end of the air duct 66 on the front panel 12 side constitutes an air outlet 67 located between the upper edge of the water tank opening 3a and the upper edge of the drum opening 4a. The blower port 67 blows warm air toward the lower part of the space in the drum 4. The dehumidifying heat exchanger / warm air circulation path 63 forms a path so as to connect the opening 63a on the blower 61 side in the upper part of the water tank and the opening 63b in the lower part of the rear of the water tank.

  When the drying system 6 is operated, air circulates in the water tank 3 as indicated by arrows in FIG. More specifically, the rotary blade 61b of the blower 61 rotates, and the warm air generated by the PTC heater 62 passes through the filter storage case 65 and the drying filter 64, passes through the blower duct 66, and passes through the blower port 67 to the inside of the drum 4. Blow out toward the bottom of the space. Thereby, the water | moisture content of the laundry in the drum 4 evaporates. The moisture-containing air, that is, humid air, flows out of the drum 4 from the small hole 4a and is sucked into the dehumidifying heat exchanger / warm air circulation path 63 from the opening 63b at the lower back of the water tank. It is cooled by the cooling water flowing into it. Thereby, the moisture contained in the humid air is condensed. That is, the moist air is dehumidified by the dehumidifying heat exchanger and hot air circulation path 63 to become dry air. The dry air is sucked into the opening 63 a on the blower 61 side, sent into the fan case 61 a, heated again by the PTC heater 62, passed through the filter storage case 65 and the dry filter 64, and then from the blower port 67. Blow out toward the bottom of the drum 4. The laundry in the drum 4 can be dried by operating the drying system 6 and circulating hot air.

  Next, operation control of the washing / drying machine according to the present invention will be described. 3 is a control block diagram of the washing / drying machine shown in FIG. 1, FIG. 4 is a flowchart of the operation control of the washing / drying machine according to the present invention, and FIG. 5 is a flowchart showing the drying operation control of the first embodiment.

  The control unit 7 includes a memory 7b that stores a control program, detection results by various sensors, setting values, and the like, and various types of detection and / or detection based on various data (such as detection results) and control programs stored in the memory 7b. Alternatively, a CPU (central processing unit) 7a that performs the determination is provided.

  A detection signal of the weight detection sensor 30 and a signal of an operation key of the operation unit 8 are input to the control unit 7. The control unit 17 outputs drive signals for the drum motor 5, the fan motor 61 c, the PTC heater 62, the water supply valve 27, and the drainage motor 24 in addition to the display signal for the display unit of the operation unit 8.

  In the operation control (FIG. 4) of the washer / dryer, the CPU 7a first determines whether or not the power key is turned on (step S1). If the power key is turned on (step S1: YES), the weight detection sensor. An initial detection value (A0) of 30 is input and stored in the memory 7b (step S2). Next, it is determined whether or not the operation start key is turned on (step S3). If the operation start key is turned on (step S3: YES), the detection value (B0) of the weight detection sensor 30 is input, and the memory 7b is stored (step S4). And the target dry weight value (B0-A0) of the laundry in a drum is calculated | required by the difference of both weight detection values (step S5). Based on this target dry weight value (B0-A0), the weight of the dry laundry put in the drum at the start of washing (before the washing and drying operation) is detected. Thereafter, the washing operation (step S6), the dehydration operation (step S7), and the drying operation (step S8) are sequentially executed.

  In the washing operation, a normal washing process such as a washing process using a detergent and a rinsing process is performed. In the dehydration operation, a dehydration process is performed in which the drum is rotated at a preset fixed number of rotations and rotation time.

  In the drying operation (FIG. 5), the drum 4 is rotated, the drying system 6 is operated to dry the laundry (step S21), and the detection value (B1) of the weight detection sensor 30 is input (step S22). Then, the initial detection value (A0) is subtracted to obtain the weight value (B1-A0) of the laundry in the drum (step S23). Further, a weight difference (B1-B0) between the weight value (B1-A0) of the laundry in the drum and the target dry weight value (B0-A0) is obtained (step S24). Next, the absolute value of the weight difference (B1−B0) is compared with the large set value Tu and the small set value Td (Tu> Td) (steps S25 to S26).

  As a result of the comparison, if the absolute value of the weight difference (B1-B0) is larger than the large set value Tu (step S25: YES), the output (heating amount) of the PTC heater 62 is increased (step S27). ). When the absolute value of the weight difference (B1-B0) is smaller than the large set value Tu (step S25: NO) and larger than the small set value Td (step S26: NO), the drying operation is continued as it is. When the absolute value of the weight difference (B1-B0) is smaller than the set value Td on the small side (step S26: YES), the output (heating amount) of the PTC heater 62 is reduced, but is input by the operation unit 8 When the target dryness is “careful” (step S28: careful), the reduction amount is reduced (step S29), and when “soft” (step S28: soft), the reduction amount is increased (step S31). In the case of “standard” (step S28: standard), it is adjusted to an intermediate reduction amount (step S30).

  As described above, since the difference between the weight of the object to be dried and the target dry weight value is large at the initial stage of drying, control is performed to increase the output of the PTC heater 62 because much heat energy is required for drying. Since the difference between the weight of the object to be dried and the target dry weight value becomes smaller as the drying stage is reached, energy saving and optimal drying operation can be performed by reducing the output of the PTC heater 62. .

  Next, in order to determine whether the laundry in the drum has reached the target dryness, the weight difference between the weight value (B1-A0) of the laundry in the drum and the target dry weight value (B0-A0) ( B1-B0) is compared with a reference value. In this case, the reference value is changed according to the target dryness input by the operation unit 8. When the target dryness is “careful”, minus n% (−n%) of the target dry weight value (B0−A0) is used as a reference value (step S32), and when the target dryness is “soft”, the target dry weight value (B0− The positive n% (+ n%) of A0) is set as a reference value (step S34), and in the case of “standard”, the target dry weight value (B0−A0) is set as a reference value (step S33). If the weight difference (B1-B0) does not reach each reference value, the drying operation is continued as it is (step S32-34: NO), and if it has reached, the drying operation is terminated (steps S35-S37).

  As described above, it is possible to accurately and easily detect the end of the drying operation by performing the drying operation until the weight value of the laundry in the drum reaches the target dry weight value. As a result, the drying is insufficient. It is possible to prevent problems such as ending the drying operation as it is, or continuing the drying operation until it becomes overdried. Also, when you want to dry it enough, let it dry until the weight value of the laundry in the drum reaches about minus several percent (-n%) of the target dry weight value. In addition, it is possible to easily end in any dry state by performing the drying operation until reaching a point of about plus several percent (+ n%) of the target dry weight value.

Embodiment 2
The second embodiment is the same as the first embodiment except for the drying operation. FIG. 6 is a flowchart showing the drying operation of the second embodiment.
In the drying operation of the second embodiment, the drum 4 is rotated, the drying system 6 is operated to dry the laundry (step S41), and the detection value (B1) of the weight detection sensor 30 is input (step S42). The initial detection value (A0) is subtracted to obtain the weight value (B1-A0) of the laundry in the drum (step S43). Further, a weight difference (B1-B0) between the weight value (B1-A0) of the laundry in the drum and the target dry weight value (B0-A0) is obtained (step S44). Next, the absolute value of the weight difference (B1-B0) is compared with the set value Tu on the large side (step S45). As a result of the comparison, if the absolute value of the weight difference (B1-B0) is larger than the large set value Tu (step S45: YES), the output (heating amount) of the PTC heater 62 is increased (S67).

  On the other hand, as a result of comparison, when the absolute value of the weight difference (B1-B0) is smaller than the larger set value Tu (step S45: NO), when the target dryness is “careful” (step S46: careful) The small set value Td1, if “soft” (step S46: soft), the small set value Td3, if “standard” (step S46: standard), the small set value Td2 (however, When Td1 <Td2 <Td3 <Tu) is set and the absolute value of the weight difference (B1-B0) is smaller than the set value Td1 or Td2 or Td3 on each small side (steps S47 to S49: YES), the PTC H The output (heating amount) of the generator 62 is reduced. In this case, when the target dryness is “careful”, the amount of decrease is reduced (step S50), when “soft” is set, the amount of decrease is increased (step S52), and when “standard” is set, the intermediate amount is reduced. The amount of decrease is adjusted (step S51).

  Next, as in the first embodiment, the weight difference (B1-B0) between the weight value (B1-A0) of the laundry in the drum and the target dry weight value (B0-A0) is changed according to the target dryness. Compared with the reference value, if the weight difference (B1-B0) does not reach each reference value, the drying operation is continued as it is (steps S53-S55: NO), and if it has reached (steps S53-S55: YES), The drying operation is terminated (steps S56-S58).

Embodiment 3
The third embodiment is the same as the first and second embodiments except that the calculation of the target dry weight value of the laundry in the drum is different. FIG. 7 is a graph illustrating the dewatering characteristics of the washing / drying machine according to the present invention.

  In the drum washing machine according to the present invention, the dewatering operation after the washing operation is performed with the drum rotation speed and the dewatering time being constant regardless of the weight of the laundry. Therefore, the degree of dewatering D (%) is substantially proportional to the weight G of the laundry after dehydration, and the degree of dehydration D is determined by detecting the weight G of the laundry after dehydration. Therefore, the initial value of the laundry at the start of washing can be obtained by substituting the detected value of the weight G of the laundry after dehydration and the value of the dehydration degree D into the definition formula of the degree of dehydration D below. Thereafter, the drying operation control is executed using the calculated initial weight of the laundry in the dry state.

        Dehydration degree D (%) = (initial dry weight / weight G of laundry after dehydration) × 100

  In the first to third embodiments, the output of the PTC heater 62 is reduced, and the drying capacity of the drying system 6 (drying unit) is reduced by reducing the heating amount. The drying capacity of the drying system 6 may be reduced by reducing the air volume by the blower 61.

  In the first to third embodiments, the dryness of the laundry during the drying operation is obtained by the difference between the weight value (B1-A0) of the laundry in the drum and the target dry weight value (B0-A0). The drying operation is terminated when the obtained dryness reaches the reference value corresponding to the target dryness. In addition to this, the target dryness “careful” “standard” and "Soft" is converted into quantitative target dryness (%) respectively, and the dryness (%) of the laundry during the drying operation calculated by the following definition formula is compared with the target dryness (%). The drying operation may be terminated when the dryness (%) of the laundry during the dry operation reaches the target dryness (%).

        Dryness (%) = (initial dry weight / weight of laundry during drying operation) × 100

  In the first to third embodiments, the washing / drying machine in which the central axis of the drum 4 is disposed in the oblique direction has been described. However, in addition to this, the washing / drying machine in which the central axis of the drum faces the vertical direction. It can also be applied.

3 Water tank 4 Drum 4b Hole 6 Drying system (drying section)
7 Control part (weight detection part, drying operation control means, comparison means, drying capacity adjustment means, dryness calculation means, dehydration operation control means, weight calculation means)
8 Operation part 30 Weight detection sensor (weight detection part, weight calculation means)

Claims (5)

A drum that is rotatably arranged in the water tank and has a plurality of holes in the peripheral wall;
Circulating the air sucked out of the drum through the hole so as to dehumidify and heat and blow out the drum, and drying the laundry in the drum;
A weight detector for detecting the weight of the laundry housed in the drum;
In a washing and drying machine comprising: a drying operation control means for rotating the drum and performing a drying operation for operating the drying unit and ending the drying operation based on a detection result of the weight detection unit;
Comparison means for comparing the difference between the weight of the laundry in the drum at the start of washing and the weight of the laundry in the drum detected by the weight detection unit during the drying operation with a set value;
A washing / drying machine comprising: a drying ability adjusting means for reducing the drying ability of the drying section when the difference is smaller than a set value as a result of comparison by the comparison means. An operation unit for inputting information on the target dryness;
A dryness calculating means for determining the dryness of the laundry based on the weight of the laundry in the drum at the start of washing and the weight of the laundry in the drum detected by the weight detection unit during the drying operation;
The drying operation control means is characterized in that the drying operation is terminated when the dryness obtained by the dryness calculating means reaches the target dryness or a reference value corresponding to the target dryness. The washing / drying machine according to claim 1.   The washing / drying machine according to claim 2, wherein the drying capacity adjusting means sets the amount of decrease in the drying capacity of the drying section to small / large corresponding to high / low of the target dryness.   The washing / drying machine according to claim 2 or 3, wherein the drying capacity adjusting means sets the set value to small / large corresponding to high / low of the target dryness. A dehydration operation control means for performing a dehydration operation for rotating the drum and dewatering the laundry in the drum based on the set dehydration operation condition;
Weight calculating means is provided for calculating the weight of the laundry in the drum at the start of the washing based on the weight of the laundry in the drum detected by the weight detection unit after the dehydration operation and the dehydration operation condition. The washing / drying machine according to any one of claims 1 to 4, wherein:

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