JP2013183899A - Clothes dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clothes dryer capable of accurately detecting a drying degree of laundry present in a rotary drum.SOLUTION: The clothes dryer comprises: a main body; a rotary drum rotatably provided in the main body; an inner peripheral plate provided on a front side of the rotary drum; and a first electrode pair and a second electrode pair provided on the inner peripheral plate so as to be brought into contact with the laundry present in the rotary drum. The first electrode pair and the second electrode pair are provided to protrude from a surface of the inner peripheral plate toward a bottom of the rotary drum in different heights.

Description

  The present invention relates to a clothes dryer having an electrode for detecting the degree of dryness of clothes in a rotating drum.

  Conventionally, it has been considered that this type of clothes dryer is provided with a detector that comes into contact with clothes inside the rotary drum, and the operation time is optimally set according to the load amount of clothes and the like from the output of the detector ( For example, see Patent Document 1).

  FIG. 7 is a cross-sectional front view of a rotating drum showing the positional relationship of detectors of a conventional clothes dryer. In FIG. 7, an annular support plate 108 having a cylindrical portion at the center is provided at the front portion of a rotating drum 117 rotatably provided in the outer box. Detectors 127 and 128 are provided at the lower part of the support plate 108 so as to oppose left and right. In the detectors 127 and 128, electrodes 131 and 132 protrude from insulating substrates 129 and 130, respectively.

  The frequency at which the clothes being stirred in the rotating drum 117 simultaneously contact the electrodes 131 and 132 increases as the amount of clothes increases. Using this, the amount of clothing is determined by counting the number of times the electrodes 131 and 132 are simultaneously contacted per predetermined time, and the drying time required to dry the amount of clothing is calculated from the determined amount of clothing. doing.

JP-A-55-66400

  However, the conventional clothes dryer has a problem that it is difficult to obtain an accurate amount of clothes when the capacity is medium in order to detect the number of times of simultaneous contact. In addition, when tangling of clothes in the rotating drum occurs during the drying operation, the resistance value between the electrode pairs changes abruptly, and it is difficult to determine the end of drying detection and the detection of tangling of clothes. Had problems.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a clothes dryer that can accurately detect the state of clothes in a rotating drum.

  In order to solve the above-described conventional problems, a clothes dryer of the present invention is provided on a rotating drum provided rotatably in a main body, a driving means for driving the rotating drum, and a front side of the main body. An inner peripheral plate, a first electrode pair and a second electrode pair provided exposed on the rear surface on the inner peripheral plate, and a first resistance for detecting the magnitude of resistance between the first electrode pair Resistance detecting means, second resistance detecting means for detecting the magnitude of the resistance between the second electrode pair, computing means connected to the first resistance detecting means and the second resistance detecting means The first electrode pair is higher in height than the second electrode pair and protrudes from the surface of the inner peripheral plate to the bottom side of the rotating drum.

By providing a plurality of electrodes and providing resistance detection means for each of the plurality of electrodes, the contact frequency for each electrode can be detected. Further, since the shortest distance between the electrodes is different depending on the electrode pair, the contact frequency can be varied depending on the capacity of the clothes, and the capacity of the clothes can be detected with high accuracy. Furthermore, by comparing the magnitude of resistance between the first electrode pair and the second electrode pair, it can be determined whether the clothes are in a tangled state or in a dry state.

  Since the clothes dryer of the present invention can accurately detect the state of clothes in the rotating drum, it can optimally perform the drying operation by preventing overdrying and non-drying of clothes and the like.

Schematic configuration diagram of a clothes dryer in Embodiment 1 of the present invention AA arrow directional view of clothes dryer in Embodiment 1 of the present invention Schematic of the principal part system of the clothes dryer in Embodiment 1 of the present invention Schematic which shows the time change of the electrode detection data number per unit time of the clothes dryer of the clothes dryer in Embodiment 1 of this invention. Front schematic diagram of a clothes dryer in Embodiment 2 of the present invention Schematic which shows the change by the clothing capacity | capacitance of the electrode detection data number per unit time of the clothes dryer in Embodiment 2 of this invention. Cross-sectional front view of a rotating drum showing the arrangement of detectors in a conventional clothes dryer

  According to a first aspect of the present invention, there is provided a clothes dryer, comprising: a rotating drum that is rotatably provided in a main body; a driving unit that drives the rotating drum; an inner peripheral plate that is provided on a front surface side of the main body; A first electrode pair and a second electrode pair provided exposed on a rear surface of the plate; a first resistance detecting means for detecting a magnitude of resistance between the first electrode pair; 2nd resistance detection means which detects the magnitude | size of resistance between two electrode pairs, The said 1st resistance detection means, and the calculating means connected to the said 2nd resistance detection means, The said 1st The electrode pair is higher in height than the second electrode pair and protrudes from the surface of the inner peripheral plate to the bottom side of the rotating drum.

  By providing a plurality of electrodes and providing resistance detection means for each of the plurality of electrodes, the contact frequency for each electrode can be detected. Further, since the shortest distance between the electrodes is different depending on the electrode pair, the contact frequency can be varied depending on the capacity of the clothes, and the capacity of the clothes can be detected with high accuracy. Furthermore, since the height of the protrusion on the bottom side of the rotating drum is different, when the clothes in the rotating drum are entangled, an imbalance of the detected resistance values between the plurality of electrode pairs occurs, that is, the difference between the detected resistance values. Changes. By observing this change, it can be determined with higher accuracy whether the clothes are in a tangled state or in a dry state.

  In a second invention, the first electrode pair of the clothes dryer of the first invention is provided at a position from the lowest point on the inner peripheral plate to 180 degrees in the rotation direction of the rotary drum, The second electrode pair is provided at a position from 180 degrees to 360 degrees in the rotation direction of the rotary drum, with the lowest point on the inner peripheral plate as a base point.

  As a result, the first electrode pair having a high height protruding toward the bottom side of the rotating drum can be provided in a portion that is easily contacted with clothing, and the second electrode having a low height protruding toward the bottom side of the rotating drum. The pair can be provided at a site that is difficult to come into contact with clothing. That is, the ease of contact with each electrode pair varies depending on the capacity of the clothes, and the capacity of the clothes can be detected with high accuracy by detecting the magnitude of the resistance of each electrode pair. Further, since the contact frequencies are different, an imbalance of the detection resistance values between the plurality of electrode pairs occurs depending on the degree of tangling of the clothing in the rotating drum, that is, the difference between the plurality of detection resistance values changes. By observing this change, it can be determined with higher accuracy whether the clothes are in a tangled state or in a dry state.

  In a third invention, the first electrode pair of the clothes dryer of the first invention is provided below a plane passing through the rotation axis on the inner peripheral plate, and the second electrode pair is It is provided above the plane passing through the rotation axis on the inner peripheral plate.

  As a result, the first electrode pair having a high height protruding toward the bottom side of the rotating drum can be provided in a portion that is easily contacted with clothing, and the second electrode having a low height protruding toward the bottom side of the rotating drum. The pair can be provided at a site that is difficult to come into contact with clothing. That is, the ease of contact with each electrode pair varies depending on the capacity of the clothes, and the capacity of the clothes can be detected with high accuracy by detecting the magnitude of the resistance of each electrode pair. Further, since the contact frequencies are different, an imbalance of the detection resistance values between the plurality of electrode pairs occurs depending on the degree of tangling of the clothing in the rotating drum, that is, the difference between the plurality of detection resistance values changes. By observing this change, it can be determined with higher accuracy whether the clothes are in a tangled state or in a dry state.

  According to a fourth aspect of the invention, in particular, the calculation means of the clothes dryer according to any one of the first to third aspects of the invention is connected to a resistance detection means for detecting a resistance between the electrode pairs in accordance with the rotation direction of the rotary drum in the previous period. The plurality of detected resistors are switched.

  Thereby, when there is no tangling of the clothes in the rotating drum, the detection resistance values between the plurality of electrode pairs during the drying operation are in a balanced state, and therefore it is possible to determine the end of drying detection and the detection of tangling of clothes.

  According to a fifth aspect of the invention, in particular, the calculation means of the clothes dryer according to any one of the first to fourth aspects includes a resistance value and an elapsed time detected by the first resistance detection means and the second resistance detection means. By comparing and calculating, the presence or absence of tangled clothing is detected.

  In the present invention, since the end time of the drying operation is corrected according to the presence or absence of tangling of the clothing during the drying operation, variation in the drying rate of the clothing after the drying operation (finished) due to the tangling of the clothing can be reduced. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of a clothes dryer according to Embodiment 1 of the present invention, FIG. 2 is a view taken along the line AA of the clothes dryer according to Embodiment 1 of the present invention, and FIG. 1 is a block circuit diagram of a clothes dryer according to Embodiment 1. FIG.

  1 to 3, a rotary drum 2 is rotatably provided in a main body 1 of a clothes dryer, and is driven to rotate by a motor 3 (driving means) attached to the rear surface. The motor 3 is composed of a brushless DC motor, and the rotation speed can be freely changed by inverter control. The rotating drum 2 is formed in a substantially bottomed cylindrical shape, and the rotating shaft 2 a is set in the horizontal direction with respect to the main body 1.

  A substantially circular opening 4 is provided on the front side of the rotary drum 2 for taking in and out a drying object such as clothes, and can be opened and closed by an openable / closable door 5. A plurality of baffles 6 for stirring clothes and the like are provided on the inner peripheral side surface of the rotating drum 2, and the clothes and the like are lifted by the baffle 6 by the rotation of the rotating drum 2 and are stirred in the rotating drum 2.

An inner peripheral plate 7 is annularly arranged on the front side, which is the front surface inside the main body 1, so as to face the opening 4, and is formed in a donut shape along the edge of the opening 4. On the rear surface of the inner peripheral plate 7 (the portion between the inner shape 7a of the inner peripheral plate and the outer shape 7b of the inner peripheral plate), that is, on the surface on the bottom side of the rotary drum 2, the first electrode pair 8 and the second electrode The electrode pair 9 is exposed. The 1st electrode pair 8 and the 2nd electrode pair 9 are provided so that the rotating drum 2 may rotate and contact with the clothes stirred.

  The first electrode pair 8 is provided higher in height than the second electrode pair 9 so as to protrude from the surface of the inner peripheral plate 7 to the bottom side of the rotary drum 2. Referring to FIG. 2, the height protruding toward the bottom side of the rotary drum 2 is higher for the first electrode pair 8, and the height of the second electrode pair 9 is lower than the height of the first electrode pair 8. It has been. The first electrode pair 8 and the second electrode pair 9 are provided below the rotary shaft 2a of the inner peripheral plate 7 with a predetermined interval.

  In addition, when the inner peripheral board 7 is not a planar shape but has a configuration with a difference in height, it is necessary to change the position at which the electrode protrudes. Therefore, the first electrode pair 8 and the second electrode pair 9 need to be provided so that the heights protruding toward the bottom of the rotating drum are relatively different. If the heights are different so that the contact frequencies are different, the heights of the electrodes themselves may be the same. That is, by making the inner peripheral plate 7 different in height, the same effect can be obtained even if the same standard electrode is used.

  Further, in the present embodiment, the rotating drum 2 rotates counterclockwise when viewed from the front, and when the clothing lifted by the baffle 6 is lifted up to the top of the rotating drum 2, it falls downward, Again, it is lifted by the baffle 6. For this reason, when the capacity of the clothes is small, the clothes are biased to the right side in the rotary drum 2. In addition, since the clothes are repeatedly dropped, they often exist below the top. Therefore, the garment often exists on the right side of the rotation shaft 2a and below the rotation shaft 2a when the rotation drum 2 is viewed from the front. In the present embodiment, the first electrode pair 8 is provided at a portion A from the lowest point of the inner peripheral plate 7 to 90 degrees in the rotation direction of the rotary drum 2. Therefore, the first electrode pair 8 is easily in contact with clothing, and the contact frequency with the clothing is high.

  On the other hand, the second electrode pair 9 is provided at a position from 180 degrees to 360 degrees in the rotation direction of the rotary drum 2 with the lowest point on the inner peripheral plate 7 as a base point. Thereby, when there is clothing at a part from 180 degrees to 360 degrees with the lowest point of the inner peripheral plate 7 as a base point, the second resistance detection means is brought into contact with the second electrode pair 9 so that the second resistance detection means You will see. In this way, the first electrode pair 8 and the second electrode pair 9 can be arranged so as to have different contact frequencies with clothes, and the capacity of the clothes can be detected with high accuracy.

  The magnitude of the resistance between the first electrode pair 8 is detected by the first resistance detecting means 10. The magnitude of the resistance between the second electrode pair 9 is detected by the second resistance detecting means 11. The first resistance detection means 10 is connected to the plurality of first detection resistors 18, the plurality of first transistors 19 respectively connected to the plurality of first detection resistors 18, and the plurality of first transistors 19. The first comparator 20 is provided. The second resistance detection unit 11 is connected to the plurality of second detection resistors 21, the plurality of second transistors 22 respectively connected to the plurality of second detection resistors 21, and the plurality of second transistors 22. The second comparator 23 is provided.

  The first electrode pair 8 and the second electrode pair 9 are provided so as to come into contact with clothes in the rotary drum 2. When the wet clothes in the rotating drum 2 come into contact with the first electrode pair 8 and the second electrode pair 9, they are electrically connected, and the first resistance detection means 10 uses the resistance value between each electrode as a detection signal. And the second resistance detection means 11 respectively. When the dried clothes are in contact with the first electrode pair 8 and the second electrode pair 9, they are not electrically connected. Therefore, the detection signal is sent to the first resistance detection means 10 and the second resistance detection means 11, respectively. Not entered.

  The first electrode pair 8 and the second electrode pair 9 are different in height at which the electrode pair protrudes, and therefore the number of energizations that are considered to be in contact with the laundry are different. Thus, the frequency per unit time which contacts with clothing mutually differs is comprised.

  The calculation means 12 is input with detection signals from the first resistance detection means 10 and the second resistance detection means 11, and the calculated signals are used for the hot air temperature control means 13, the circulating air volume control means 14, and the drum rotation speed. Input to the control means 15.

  The hot air temperature control means 13 controls the temperature of the drying air heated by heating means (not shown) such as a heater. The circulating air volume control means 14 controls the air volume of the drying air blown into the rotary drum 2 by air blowing means (not shown) such as an air blowing fan. Further, the drum rotation speed control means 15 controls the rotation speed of the rotary drum 2 driven by the motor 3.

  The control means 16 is arranged in the upper front part in the main body 1 and includes a first resistance detection means 10, a second resistance detection means 11, a calculation means 12, a hot air temperature control means 13, and a circulating air volume control means. 14, drum rotation speed control means 15, and detection resistance switching means 17 are included. The detection resistance switching means 17 turns on / off the first transistor 19 and the second transistor 22 to detect a plurality of resistance values for detecting the resistance value between the first electrode pair 8 and the second electrode pair 9. The detection resistor, that is, the first detection resistor 18 and the second detection resistor 21 are switched.

  About the clothes dryer comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the drying operation is started, the rotating drum 2 is rotated at a predetermined number of rotations by the motor 3, and drying air having a predetermined temperature is blown into the rotating drum 2. The clothes thrown into the rotating drum 2 are lifted and stirred by the baffle 6 by the rotating operation of the rotating drum 2, the moisture is removed by contact with the drying air, and the drying proceeds.

  When clothing in the rotating drum 2 contacts the first electrode pair 8 and the second electrode pair 9, the resistance value between the respective electrode pairs is detected by the first comparator 20 and the second comparator 23. Compared to the value.

  When the resistance values between the first electrode pair 8 and the second electrode pair 9 are smaller than the resistance values of the first detection resistor 18 and the second detection resistor 21, respectively, that is, the clothing in the rotary drum 2 is In the “wet state”, a high potential signal is input to the calculation means 12.

  When the resistance values between the first electrode pair 8 and the second electrode pair 9 are larger than the resistance values of the first detection resistor 18 and the second detection resistor 21, respectively, that is, the clothing in the rotary drum 2 is In the “dry state”, a low potential signal is input to the calculation means 12.

  The calculation means 12 calculates the number of data of low potential signals (clothes in the rotating drum 2 are “dry”) per unit time input from the first resistance detection means 10 and the second resistance detection means 11. By processing, the capacity and drying rate of the clothes in the rotary drum 2 are detected.

  FIG. 4 is a schematic diagram showing temporal changes in the number of electrode detection data per unit time of the clothes dryer according to Embodiment 1 of the present invention.

  When the clothes in the rotary drum 2 are wet and there is no tangling of the clothes, it is detected as follows.

  In FIG. 4, at the elapsed time t1, the resistance value between the first electrode pair 8 and the resistance value between the second electrode pair 9 are smaller than the resistance values of the first detection resistor 18 and the second detection resistor 21. . Therefore, the low potential signal is input to the computing means 12 by the first comparator 20 and the second comparator 23. That is, the number of data of the low potential signal (the clothing in the rotating drum is “dry”) per unit time (for example, 10 seconds) input from the first resistance detection unit 10 and the second resistance detection unit 11 is Both values are smaller than the threshold value Rd. Here, the threshold value Rd is a value determined to be in a dry state.

  When the clothes in the rotating drum are wet and the clothes are tangled, they are detected as follows.

  In FIG. 4, the resistance value between the first electrode pair 8 is smaller than the resistance value of the first detection resistor 18 at the elapsed time t2. Therefore, a low potential signal is input to the calculation means 12 by the first comparator 20. Further, the resistance value between the second electrode pair 9 is larger than the resistance value of the second detection resistor. Therefore, the low potential signal is input to the calculation means 12 by the second comparator 23. That is, the number of data of the low potential signal (the clothing in the rotating drum is “dry”) per unit time (for example, 10 seconds) input from the first resistance detection unit 10 and the second resistance detection unit 11 is One of the values is larger than a threshold value Rd that is determined to be a dry state.

  When the clothes in the rotating drum are in a dry state, they are detected as follows.

  In FIG. 4, at the elapsed time t2, the resistance value between the first electrode pair 8 and the resistance value between the second electrode pair 9 are larger than the resistance values of the first detection resistor 18 and the second detection resistor. . Therefore, the low potential signal is input to the computing means 12 by the first comparator 20 and the second comparator 23. That is, the number of data of the low potential signal (the clothing in the rotating drum is “dry”) per unit time (for example, 10 seconds) input from the first resistance detection unit 10 and the second resistance detection unit 11 is Both values are larger than the threshold value Rd.

  As described above, in the clothes dryer of the present invention, by comparing and calculating a plurality of electrode detection signals during the drying operation, the presence or absence of the degree of tangling of the clothes in the rotating drum 2 is detected, and the dry state of the clothes is determined. It can be detected accurately. Further, by detecting the number of low potential signal data per unit time, that is, the contact frequency, it is possible to virtually detect the resistance value of the clothing that is constantly moving in the rotary drum 2.

  Note that in this embodiment, the presence or absence of entanglement is determined based on the number of data of the low potential signal, that is, the virtual resistance value, but is not limited thereto. It is also possible to determine that there is entanglement if the difference in the number of data of the low potential signal, that is, the difference in virtual resistance value exceeds a predetermined value.

  Although the rotation direction of the rotary drum 2 is counterclockwise, it may be clockwise. In that case, the first electrode pair 8 is provided on the left side of the rotating shaft 2a in front view. More preferably, it is provided below the rotating shaft 2a. The second electrode pair 9 is provided on the right side of the rotation shaft 2a when viewed from the front. Furthermore, in order to make a difference in contact frequency, it is provided above the rotating shaft 2a. Even if it is such a structure, there exists the same effect. Further, the rotation direction of the rotary drum 2 does not need to be one direction, and the time for rotating clockwise may be longer than the time for rotating counterclockwise.

(Embodiment 2)
FIG. 5 is a schematic front view of a clothes dryer according to Embodiment 2 of the present invention. FIG. 6 is a schematic diagram showing a change in the number of electrode detection data per unit time of the clothes dryer according to the second embodiment of the present invention depending on the clothing capacity. In the present embodiment, the first electrode pair 8 is provided below the plane passing through the rotation shaft 2 a on the inner peripheral plate 7, and the second electrode pair 9 is provided with the rotation shaft 2 a on the inner peripheral plate 7. It is provided above the passing plane. Moreover, the control means 16 detects the capacity | capacitance of clothing. The other embodiments use the first embodiment. Hereinafter, a configuration and control different from those of the first embodiment will be described.

  In the present embodiment, the rotating drum 2 rotates counterclockwise when viewed from the front, and when the clothing lifted by the baffle 6 is lifted up to the upper part of the rotating drum 2, it falls downward, Lifted by baffle 6. For this reason, when the capacity of the clothes is small, the clothes are biased to the left side in the rotary drum 2. In addition, since the clothes are repeatedly dropped, they often exist below the top. Therefore, the garment often exists on the right side of the rotation shaft 2a and below the rotation shaft 2a when the rotation drum 2 is viewed from the front. In the present embodiment, the first electrode pair 8 is provided at a portion A from the lowest point of the inner peripheral plate 7 to 90 degrees in the rotation direction of the rotary drum 2. Therefore, the first electrode pair 8 is easily in contact with clothing, and the contact frequency with the clothing is high.

  On the other hand, the second electrode pair 9 is provided at a portion C from 90 degrees to 180 degrees in the rotation direction of the rotary drum 2 with the lowest point on the inner peripheral plate 7 as a base point. Thereby, when there is clothing at a part from 180 degrees to 360 degrees with the lowest point of the inner peripheral plate 7 as a base point, the second resistance detection means is brought into contact with the second electrode pair 9 so that the second resistance detection means You will see. In this way, the first electrode pair 8 and the second electrode pair 9 can be arranged so as to have different contact frequencies with clothes, and the capacity of the clothes can be detected with high accuracy.

  Note that the second electrode pair 9 only needs to be provided above the rotation shaft 2a, so that the rotation point of the rotary drum 2 is 180 to 270 degrees from the lowest point of the inner peripheral plate 7 as a base point. It is good also as a structure provided in the site | part.

  Hereinafter, the cloth amount detection will be described with reference to FIG.

  During drying, for example, the number of electrode detection data Wd of the low potential signal detected by the first resistance detection unit 10 per unit time is small, and the low potential detected by the second resistance detection unit 11 per unit time is low. When the number of electrode detection data We of the signal is small, it can be determined that the clothing capacity X1 is a small capacity.

  If the first resistance detection means 10 detects a large number of electrode detection data Wd per unit time and the second resistance detection means 11 detects a small number of electrode detection data We per unit time, It can be determined that the capacity X2 is a medium capacity.

  In addition, when the number of electrode detection data Wd detected by the first resistance detection unit 10 per unit time is large and the number of electrode detection data We detected by the second resistance detection unit 11 per unit time is large, It can be determined that the capacity X3 is a large capacity.

  That is, since the number of times per unit time that the clothes in the rotating drum 2 contact the plurality of electrode pairs differs depending on the clothes capacity with respect to the first electrode pair 8 and the second electrode pair 9, Can be detected in several stages.

  The control means 16 also has a plurality of detection resistors for detecting resistance values between the electrodes of the first electrode pair 8 and the second electrode pair 9 according to the capacity and drying rate of the clothes in the rotary drum 2. By switching the above, the drying rate in the rotary drum 2 can be detected in a plurality of stages (drying rate).

  FIG. 4 is a schematic diagram showing temporal changes in the number of electrode detection data per unit time of the clothes dryer according to Embodiment 1 of the present invention. When the electrode detection data number Wn reaches the upper limit value Wmax, it can be detected that the clothes in the rotary drum 2 are in a “dry state”.

  The control means 16 includes a plurality of first detection resistors 18 and second electrodes for detecting a resistance value between the electrodes of the first electrode pair 8 according to the capacity and drying rate of the clothes in the rotary drum 2. The plurality of second detection resistors 21 for detecting the resistance value between the pair of electrodes 9 are switched. For example, at time t1, the electrode detection data number Wa for detecting a clothing drying rate of about 85% is the upper limit value Wmax, and at time t2, the electrode detection data number Wb for detecting a clothing drying rate of about 90% is the upper limit value. At time t3, the electrode detection data number Wc for detecting the clothes drying rate of about 95% becomes the upper limit value Wmax. Thereby, the drying rate of the clothes in the rotating drum 2 can be detected as a plurality of stages (drying rates).

  The calculation means 12 is based on the number of electrode detection data of the low potential signal per unit time input from the first resistance detection means 10 and the second resistance detection means 11, and the capacity and drying rate of the clothes in the rotary drum 2 In response to this, a control signal is input to the hot air temperature control means 13, the circulating air volume control means 14 and the drum rotation speed control means 15.

  As described above, in the clothes dryer of the present invention, the first electrode pair 8 and the second electrode pair 9 are provided so that the number of times per unit time contacting the clothes in the rotary drum 2 is different, and the calculation means 12 can detect the capacity of the garment in stages from a large capacity to a small capacity by comparing and calculating signals from the first resistance detecting means 10 and the second resistance detecting means 11 at the start of the drying operation. it can. Since the plurality of electrode pairs provided so that the number of times of contact with clothing per unit time is different have resistance detection means corresponding to each, the contact frequency for each contacted electrode pair can be seen. For this reason, the clothing capacity can be accurately detected.

  Further, by switching between the plurality of first detection resistors 18 and the plurality of second detection resistors 21 in accordance with the clothing capacity and the drying rate of the clothing at the start of operation, the drying rate of the clothing during the drying operation is moistened. It can be detected step by step from the state to the dry state. Thereby, the drying rate of clothes etc. in the rotating drum 2 can be detected in steps, and overdrying and non-drying of clothes etc. can be prevented and drying operation can be performed optimally.

  The rotating direction of the rotating drum 2 does not have to be one direction, and the time for rotating clockwise may be longer than the time for rotating counterclockwise.

  Furthermore, the rotation direction of the rotating drum 2 only needs to rotate clockwise when detecting contact with clothing. Furthermore, the rotation direction of the rotating drum 2 is not limited to the clockwise direction, and may be counterclockwise. In this case, the first electrode pair 8 is configured to be provided below the rotating shaft 2a and on the right side of the rotating shaft 2a when viewed from the front. Even if it does in this way, there exists the same effect.

  As described above, in the clothes dryer according to the present invention, the clothes dryer according to the present invention is connected to a plurality of electrode pairs provided so as to come into contact with the clothes in the rotating drum, and the respective electrode pairs. By having a configuration with a plurality of detection resistors, it is possible to accurately detect the degree of dryness of the clothes in the rotating drum during the drying operation, thereby reducing the variation in the drying rate of the clothes after the drying operation (finished) Can do. That is, in the clothes dryer according to the present invention, it is possible to provide a clothes dryer that automatically stops operation at an arbitrary drying rate without manually stopping the drying operation by the user.

DESCRIPTION OF SYMBOLS 1 Main body 2 Rotating drum 7a Inner shape of inner peripheral board 7b Outer shape of inner peripheral board 8 1st electrode pair 9 2nd electrode pair 10 1st resistance detection means 11 2nd resistance detection means 12 Calculation means 15 Drum rotation Number control means 16 Control means 17 Detection resistance switching means 18 First detection resistance 19 First transistor 20 First comparator 21 Second detection resistance 22 Second transistor 23 Second comparator

Claims (5)

A rotating drum rotatably provided in the body,
A rotating shaft for supporting the rotating drum;
Driving means for driving the rotating drum;
An inner peripheral plate provided on the front side of the main body,
A first electrode pair and a second electrode pair exposed on the rear surface on the inner peripheral plate;
First resistance detection means for detecting the magnitude of resistance between the first electrode pair;
Second resistance detection means for detecting the magnitude of resistance between the second electrode pair;
Computing means connected to the first resistance detection means and the second resistance detection means, wherein the first electrode pair rotates from the surface of the inner peripheral plate more than the second electrode pair. A clothes dryer with a high height protruding toward the bottom of the drum. The first electrode pair is provided at a site from the lowest point on the inner peripheral plate to 180 degrees in the rotation direction of the rotary drum,
2. The clothes dryer according to claim 1, wherein the second electrode pair is provided at a position from 180 degrees to 360 degrees in the rotation direction of the rotary drum, with the lowest point on the inner peripheral plate as a base point. The first electrode pair is provided below a plane passing through the rotation axis on the inner peripheral plate,
The clothes dryer according to claim 1, wherein the second electrode pair is provided above a plane passing through the rotation shaft on the inner peripheral plate. The first resistance detection means has a plurality of first detection resistors,
The second resistance detection means has a plurality of second detection resistors,
The arithmetic means switches a plurality of the first detection resistors and a plurality of the second detection resistors in accordance with the rotation direction of the rotary drum, and sets the first electrode pair and the second electrode pair. The clothes dryer according to any one of claims 1 to 3, wherein the magnitude of the resistance is detected. The said calculating means detects the presence or absence of clothing tangles by comparing and calculating the resistance value and the elapsed time detected by the first resistance detecting means and the second resistance detecting means. A clothes dryer according to claim 1.