JPH06170095A - Clothes dryer - Google Patents

Abstract

PURPOSE:To discriminate a lump state of clothes being apt to become a lump state such as a bed sheet and a towelket, and a small quantity of clothes, in the clothes dryer for drying clothes by allowing hot air to circulate into a rotary drum. CONSTITUTION:Hot air is allowed to circulate into a rotary drum 1 for drying clothes by a heat exchange type both blade fan, a PTC heater 3 is provided in a ventilation path to the inside of the rotary drum 1, and the rotary drum 1 and the heat exchange type both blade fan are driven to rotate by a motor 5. A revolving speed of the rotary drum 1 is detected by a rotation detecting means 7, a temperature of circulating air is detected by a temperature detecting means 6 for detecting a temperature in the rotary drum 1, and by a control means 9, a revolving speed of the motor 5 and the PTC heater 3 are controlled. The control means 9 controls the revolving speed of the rotary drum 1 in accordance with a drying operation initial process, a clothes state detecting process or a drying operation process, and in the clothes state detecting process for executing variable control of the revolving speed of the rotary drum 1 to a high speed, the kind of clothes or a state of clothes is detected by a variation of a detected temperature of the temperature detecting means 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clothes dryer which circulates warm air in a rotary drum which is driven by a motor to dry clothes.

[0002]

2. Description of the Related Art In recent years, household clothes dryers have become widespread, and it is required that they can be dried without unevenness in drying regardless of the kind of material to be dried.

Conventionally, this kind of clothes dryer is constructed so that the rotary drum is rotationally driven at a substantially constant number of rotations, and the temperature of the warm air circulated in the rotary drum is controlled to be substantially constant. Was common.

[0004]

In such a conventional clothes dryer, when clothes having a large area such as sheets or towels are dried, the clothes are entangled in a dangle and only the surface is dried. There is a problem that the inside of the clothes does not dry and the unevenness of drying becomes large.

The present invention solves the above problems by automatically detecting the dango state of clothes, such as sheets and towels, which are likely to be dango, so that it can be dried without unevenness and the dango state can be improved. The purpose is to be able to distinguish between worn out clothes and small amount of clothes.

[0006]

In order to achieve the above object, the present invention provides a rotating drum for drying clothes, an air blowing means for circulating warm air into the rotating drum, and an air blowing path into the rotating drum. Heating means provided in the rotary fan, a motor for rotationally driving the blower means or the rotary drum, a rotation detecting means for detecting the number of rotations or a rotation cycle of the rotary drum, the motor, etc., the temperature inside the rotary drum or the heating means. Temperature detecting means for detecting the intake air temperature of the motor, and control means for controlling the number of revolutions of the motor or the heating means, the control means depending on the drying operation initial step, the clothes condition detecting step or the drying operation step. By controlling the number of rotations of the rotating drum, it is possible to detect the type of clothes or the state of clothes by the change in the temperature detected by the temperature detecting means in the clothes state detecting step. It was thing to have a first means for solving problems.

Further, the control means of the first problem solving means controls the number of rotations of the rotating drum at a high speed in the clothes condition detecting step, and the temperature detected by the temperature detecting means is controlled from the temperature at the start of the clothes condition detecting step. The second problem solving means is to determine the type of clothing or the state of clothing depending on the degree of decrease.

Further, the temperature detecting means of the first problem solving means comprises a first temperature detecting means for detecting the temperature inside the rotating drum and a second temperature detecting means provided in the air blowing path of the heating means. The control means determines the type of clothing or the state of clothing by the degree of change in the temperature difference between the temperature detected by the first temperature detection means and the temperature detected by the second temperature detection means in the clothing state detection step. This is the third means for solving the problems.

Further, the control means of the first problem solving means sets the rotation speed of the rotary drum to a low value at the start of operation, and in the initial step of the drying operation until the temperature detected by the temperature detection means becomes equal to or higher than the set value. According to the fourth aspect, the type of clothing or the state of clothing is determined based on the driving time until the temperature detected by the temperature detecting means exceeds a set value.
Is used as a means for solving the problem.

In addition to the first means for solving the above problems,
The current detection means for detecting the current of the heating means, and the current comparison setting means for inputting the output of the current detection means are provided, and the control means uses the output of the current comparison setting means to set the rotational speed of the rotating drum, the motor, etc. Alternatively, a fifth problem solving means is that the set rotation cycle is controlled so that the rotation speed of the rotating drum is set to be low at the start of the operation to reduce the current of the heating means.

Further, the control means of the first or fourth problem solving means sets the rotation speed of the rotating drum to a low value at the start of operation, and when the temperature detected by the temperature detecting means exceeds the set value, the rotation of the rotating drum is started. The number of the clothes is variably controlled from low speed to high speed, and the state of the clothes is judged by the operating time until the temperature exceeds the set value and the degree of change in the temperature detected by the temperature detecting means, and the rotation speed of the rotating drum is controlled. This is the sixth means for solving the problems.

[0012]

According to the first means for solving the above problems, the present invention provides:
By operating the rotation speed of the rotating drum at a low speed at the start of operation, the rotation speed of the blower unit that is linked can be operated at a low speed,
The operation can be started when the inrush current of the heating means composed of a PTC heater or the like is below a specified current value, and when the temperature inside the rotary drum rises, the rotational speed of the rotary drum is variably controlled at high speed.
At this time, the time required for the temperature detected by the temperature detecting means to reach the set value is compared with a predetermined reference time. If the predetermined reference time T ₀ or less, the clothes in the rotating drum are sheets such as sheets and towels. It is determined that the clothes are likely to be in a state or a small amount of clothes, and the process enters into a clothes state detecting step of driving the rotating drum at a high speed. In the clothes condition detection process, clothes that tend to be in a dumpling condition such as sheets and towels loosen and the temperature inside the rotating drum drops sharply. The change of can detect the type of clothes or the state of the clothes in the rotating drum.

Further, the second problem solving means determines that the clothes in the rotary drum are garments such as sheets and towels which are likely to be dumped or small quantities in the initial step of the drying operation, or enters the clothes state detecting step. In addition, the rotation speed of the rotating drum can be increased to loosen the dango state.Moreover, the temperature detected by the temperature detection means drops sharply for clothes such as sheets and towel racks that tend to become a dumb state, and decreases for small amounts of clothing. Therefore, the type of clothes or the state of the clothes in the rotating drum can be detected by the change in the temperature detected by the temperature detecting means.

Further, when the type of clothes or the state of the clothes in the rotating drum is detected in the clothes state detecting step in which the rotation number of the rotating drum is variably controlled at high speed by the third means for solving the problem, the influence of the ambient temperature is detected. Can be eliminated
The detection accuracy can be improved.

Further, according to the fourth problem solving means, in the initial step of the drying operation, depending on the operation time until the temperature detected by the temperature detecting means becomes equal to or higher than the set value, the clothes or the small amount such as sheets or towels which are likely to be in a dumpling state. It is possible to easily and surely distinguish between clothing and clothing other than these.

Further, according to the fifth means for solving the problems, the rotation speed of the rotary drum at the start of the operation can be controlled by the current flowing through the PTC heater, and the rotation speed of the air blowing means interlocking with the rotary drum can be lowered, so that the PTC It is possible to prevent an excessive inrush current from flowing through the heater.

Further, according to the sixth means for solving problems, clothes which are likely to be dumpling such as sheets and towels and small clothes can be discriminated by the ON time of the PTC heater after the rotational speed of the rotary drum is controlled at high speed. The rotating drum can be rotated at a rotation speed according to the type of clothes or the state of clothes in the rotating drum.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, the rotary drum 1 is for accommodating and drying an object to be dried (clothes), and hot air is circulated in the rotary drum 1 by a heat exchange type double-blade fan (blowing means) 2. The heat exchange type double-blade fan 2 circulates warm air in the rotary drum 1 and at the same time takes in air from the outside to cool the fan and dehumidify the circulating air in the rotary drum 1. P
The TC heater (heating means) 3 is arranged in the air blowing path to the rotary drum 1, that is, in the circulating air intake, and heats the circulating air. The filter 4 is provided in the ventilation path of the heat exchange type double-blade fan 2, that is, in the air outlet of the rotary drum 1. When the filter 4 is clogged with lint, etc., the amount of air blown decreases, the heating power of the PTC heater 3 decreases, and the drying time becomes longer and the drying efficiency also decreases. The motor 5 rotationally drives the rotary drum 1 and the heat exchange type double-blade fan 2. By controlling the rotation speed of the motor 5, the rotation speeds of the rotary drum 1 and the heat exchange-type double-blade fan 2 can be controlled.
The amount of heat generated by the heater 3 can be controlled, and the current can be controlled. The temperature detecting means 6 comprises a first temperature detecting means 6a and a second temperature detecting means 6b, and the first temperature detecting means 6a detects the exhaust gas temperature according to the temperature inside the rotary drum 1, It is attached to the exhaust port of the rotary drum 1, and the second temperature detecting means 6b is provided in the air blowing path of the PTC heater 3.

The rotation detecting means 7 detects the number of rotations of the rotary drum 1, and has magnets 3 to 6 on the rotary drum 1.
Individually attached, a magnetic sensor (not shown) is fixed to the main body to detect the number of rotations of the rotary drum 1. The control means 9 controls the rotation speed of the motor 5 and the PTC heater 3,
Rotation speed setting means 10 for setting the rotation speed of the rotary drum 1.
And a rotation speed comparison means 11 for comparing the output of the rotation detection means 7 with the output of the rotation speed setting means 10, and the rotation speed comparison means 1
A conduction angle control means 13 for controlling the conduction angle of the bidirectional thyristor 12 connected in series to the motor 5 by the output of 1.
Current comparison setting means 1 for inputting the output of the current detection means 14
5 and the temperature control means 1 for inputting the output of the temperature detection means 6.
6, the difference between the rotation speed of the rotary drum 1 detected by the rotation detection means 7 and the set rotation speed from the rotation speed setting means 10 is compared by the rotation speed comparison means 11, and the conduction angle control means 13 is provided. Controls the bidirectional thyristor 12 to control the rotation speed of the motor 5. Phase control can be considered as the simplest conduction time control method. In the case of an inverter, not only the conduction time but also the frequency is controlled. By doing so, stable rotation control of the motor 5 and the rotary drum 1 can be performed.

The control means 9 controls the number of rotations of the rotary drum 1 in accordance with the initial step of the drying operation, the clothes condition detecting step or the drying operation step, and changes the temperature detected by the temperature detecting means 6 in the clothes condition detecting step. The type of clothing or the condition of clothing can be detected. At this time, the temperature detecting means 6 uses the temperature difference between the detected temperature of the first temperature detecting means 6a and the detected temperature of the second temperature detecting means 6b as the detected temperature. The temperature detected by the temperature detecting means 6 may be the temperature detected by the first temperature detecting means 6a alone. Further, the output of the temperature detection means 6 for detecting the temperature of the circulating air to the rotary drum 1 is input to the temperature control means 16, and this temperature control means 16 is supplied.
Control the relay contacts 17a and 17b respectively connected to the PTC heaters 3a and 3b.
The temperature of the circulating air is controlled by controlling ON and OFF of a and 3b.

The current detecting means 14 is the current transformer 1.
8 and the current-voltage conversion circuit 19, detects the input current of the PTC heater 3, and outputs the output from the current comparison setting means 1.
Enter in 5. The current comparison setting means 15 compares the set current value of the PTC heater 3 with the output of the current detection means 14,
The output is input to the rotation speed setting means 10 to control the set rotation speed. Here, the set rotation speed set by the rotation speed setting means 10 is set so that the current of the PTC heater 3 does not exceed or fall below a predetermined current value.

In the above configuration, FIGS. 3 (a) to 3 (c) and FIG.
The operation will be described with reference to (a) to (c).
(c) shows the case where the clothes in the rotating drum 1 are dried such as sheets, towels and the like, which tend to be in a dumpling state, and FIGS. 4 (a) to (c) show a small amount of clothes in the rotating drum 1. Shows the case of drying. When the operation of the initial step of the drying operation is started, the operation of the rotary drum 1 is started at a low speed (36 rpm). Therefore, the rotation speed of the heat exchange type double-blade fan 2 can be lowered, and the operation can be started when the inrush current of the PTC heater 3 is equal to or less than the specified current value. The output of the current detection means 14 is input to the current comparison setting means 15, and the output of the current comparison setting means 15 controls the set rotation speed of the rotation speed setting means 10 to raise the temperature in the rotary drum 1. The number of rotations of the rotary drum 1 is gradually increased in accordance with. At the same time, since the PTC heater 3 is energized as shown in FIG. 3 (c) or FIG. 4 (c), the temperature inside the rotary drum 1 becomes as shown in FIG. 3 (b) or FIG. 4 (b). It gradually rises as shown. At this time, when the clothes in the rotating drum 1 are in a dumpling state or when the clothes are in a small amount, almost no warm air is applied to the clothes, so that the temperature inside the rotating drum 1 rises rapidly.

[0024] the temperature detected by the temperature detecting means 6 reaches the set value T _s at time t _1, the time t ₁ and a predetermined reference time t ₀ until the temperature detected by the temperature detecting means 6 reaches the set value T _s If the predetermined reference time t ₀ or less, the clothes in the rotary drum 1 are determined to be clothes such as sheets or towels that are likely to be dumped, or a small amount of clothes, and P
Turn off the TC heater 3 and rotate the rotary drum 1 at high speed (45r
pm) Enter the clothing state detection process for driving. By setting the rotation speed of the rotating drum 1 at a high speed, the rotating drum 1
Dangling clothes such as sheets and towels inside are loosened. Therefore, the warm air blows on the clothes, and the temperature in the rotary drum 1 rapidly decreases. When the temperature inside the rotary drum 1 drops, the PTC heater 3 is turned on.
Dangerous clothes such as sheets and towels can be detected depending on the on-time of the TC heater 3 or the degree of temperature decrease. That is, the on-time of the PTC heater 3 due to the change in the temperature detected by the temperature detecting means 6 in the clothes state detecting step becomes long as shown in FIG. Therefore, P
When the time for energizing the TC heater 3 is longer than the reference time t _s , it is determined that the clothes are sheets or towels that are likely to be dumped. The rotating drum 1 is rotated at high speed (45 rpm) even in the drying operation process. Further, in the case of a small amount of clothing, the temperature detected by the temperature detecting means 6 is as shown in FIG.
As shown in FIG. 4 (b), since it decreases in a short time, the time for energizing the PTC heater 3 is the reference time t _s as shown in FIG. 4 (c).
It becomes shorter and it is determined as a small amount of clothes. At this time, the rotating drum 1 is lowered (40 rpm) in the drying operation process to continue the drying operation.

Next, the above operation will be described in detail with reference to FIGS. FIG. 5 is an operation flowchart of one embodiment of the present invention, which starts in step 30 and determines in step 31 whether it is the initial step of the drying operation. If it is the initial process of the drying operation, the process proceeds to step 32 and the PTC heater 3
Is detected to control the set rotational speed of the motor 5, and the rotational speed of the motor 5 is controlled by this set rotational speed. Details of the operation at this time will be described in detail with reference to FIG.

In step 51, a 1 second timer is set,
In step 52, the current detection means 14 detects the current,
In step 53, the current comparison setting means 15 calculates an error from the current setting value. This calculation result is used as the rotation speed setting means 1
0 is input, and in step 54, the rotation cycle of the rotary drum 1 is calculated and set based on the calculation result. Then, the cycle Ts calculated and set in step 55 is compared with the maximum cycle Tsmax, and if the cycle Ts is larger than the maximum cycle Tsmax, the routine proceeds to step 56, where the maximum cycle Tsmax is set. If the cycle Ts is smaller than the maximum cycle Tsmax, the routine proceeds to step 57, where the calculated cycle Ts is compared with the minimum cycle Tsmin to determine the cycle Ts.
Is smaller than the minimum period Tsmin, the process proceeds to step 58, and the minimum period Tsmin is set as the set period, and the process proceeds to step 59. If the period Ts is larger than the minimum period Tsmin, the process proceeds to step 59. Therefore, the set cycle Ts set by the rotation speed setting means 12 is set smaller than the maximum cycle Tsmax and larger than the minimum cycle Tsmin.

In step 59, it is determined whether or not the rotation detection signal is input from the rotation detection means 7. If the rotation detection signal is input, in step 60 the rotation cycle T
Is detected and the process proceeds to step 61. In step 61, the rotation speed comparison means 13 detects an error from the set cycle Ts and proceeds to step 62. It is determined whether the detected error is within the set range, and if it is within the set range, the next step (step of FIG. 5). Go to 33). If the detected error is not within the set range, the process proceeds to step 63, the conduction angle control means 13 calculates and sets the control phase, and the rotation speed of the rotary drum 1 is controlled to the rotation speed set by the rotation speed setting means 10. Then proceed to the next step. In step 59, if the rotation detecting signal is not input from the rotation detecting means 7, the process proceeds to the next step.

In this way, the rotation speed of the rotary drum 1 gradually increases from the low speed (36 rpm) at the start of the operation. In step 33 of FIG. 5, it is determined whether the temperature detected by the temperature detecting means 6 has reached the set value T _s, and the set value T is reached at time t _{1.
When s} is reached, the routine proceeds to step 34, where the time t ₁ required for the temperature detected by the temperature detecting means 6 to reach the set value is compared with a predetermined reference time t ₀ . The clothes in the rotating drum 1 are sheets,
In the case of clothes such as towelettes that tend to be in a dumpling state or a small amount of clothes, the time taken for the temperature detected by the temperature detecting means 6 to reach the set value is short, so if the predetermined reference time t ₀ or less, proceed to step 35. It is determined that the clothes in the rotating drum 1 are clothes such as sheets and towels that are likely to be dumped or small quantities of clothes. Then, when the clothing state detecting step is entered in step 36, step 37
Then, the rotation speed setting means 10 sets the rotation speed of the rotary drum 1 to a high speed (45 rpm), and in step 38, the rotation speed of the rotary drum 1 is controlled to be high.

In step 39, it is judged whether or not the temperature detected by the temperature detecting means 6 has reached the set value, and when it reaches the set value at time t ₃ , the process proceeds to step 40 and the PTC heater 3 is turned off. Then, compared with the PTC heater 3 on time and the reference time t _s in step 41, is longer than the reference time t _s proceeds to step 42, the clothes in the rotary drum 1 sheets, prone to dumplings conditions such as towel When it is determined that the clothes are clothes, the process proceeds to the next step (drying operation step), and the drying operation is continued with the rotational speed of the rotary drum 1 kept at a high speed (45 rpm). When the time is shorter than the reference time t _s , the routine proceeds to step 44, where it is determined that the clothes in the rotary drum 1 are a small amount of clothes and the routine proceeds to the next step (drying operation step) where the rotation speed of the rotary drum 1 is reduced to 40 rpm for drying. Continue driving. When the detected temperature of the temperature detecting means 6 does not reach the set value in step 39, the process proceeds to step 45, the PTC heater 3 is turned on, the process proceeds to step 46, the heater-on timer is counted, and the process returns to step 37.

As described above, according to this embodiment, the control means 9 controls the number of rotations of the rotary drum 1 in accordance with the drying operation initial step, the clothes condition detecting step or the drying operation step. Since the type of clothes or the state of the clothes can be detected by the change in the temperature detected by the temperature detecting means 6, the temperature detected by the temperature detecting means 6 in the clothes state detecting step becomes a dumpling state such as sheets and towels. For easy clothes, the temperature decreases rapidly, and for small amounts of clothes, the decrease is small.
Clothes such as sheets and towels that tend to be dumped can be discriminated from small clothes, and dry operation can be performed according to the type of clothes or the condition of clothes in the rotating drum.

In the above embodiment, the case where the rotating drum 1 and the heat exchanging type double-blade fan 2 are driven by one motor 5 is shown, but the effect is the same even if two motors are provided. is there.

[0032]

As is apparent from the above embodiments, according to the present invention, a rotating drum for drying clothes, an air blowing means for circulating warm air into the rotating drum, and an air blowing path into the rotating drum. Heating means provided in the rotary fan, a motor for rotationally driving the blower means or the rotary drum, a rotation detecting means for detecting the number of rotations or a rotation cycle of the rotary drum, the motor, etc., the temperature inside the rotary drum or the heating means. Temperature detecting means for detecting the intake air temperature of the motor, and control means for controlling the number of revolutions of the motor or the heating means, the control means depending on the drying operation initial step, the clothes condition detecting step or the drying operation step. By controlling the number of rotations of the rotating drum, it is possible to detect the type of clothes or the state of clothes by the change in the temperature detected by the temperature detecting means in the clothes state detecting step. Therefore, the change in the temperature detected by the temperature detection means in the clothes condition detection process, in which the rotation speed of the rotating drum is variably controlled at high speed, causes the clothes to be unraveled rapidly in clothes such as sheets and towel racks that tend to be in a dumpling state. Since the temperature decreases and the amount of small clothes decreases less, the type of clothes or the state of the clothes in the rotating drum can be detected by the change in the temperature detected by the temperature detecting means.

Further, the control means controls the number of rotations of the rotary drum at a high speed in the clothes condition detecting step, and determines the kind of clothes depending on the degree of decrease in the temperature detected by the temperature detecting means from the temperature at the start of the clothes condition detecting step. Alternatively, since the state of the clothes is determined, when the clothes in the rotary drum are likely to be dumpling such as sheets and towels in the initial step of the dry operation, or when it is determined that the clothes are a small amount of clothes and the state of the clothes is detected, In addition, the rotation speed of the rotating drum can be increased to loosen the dango state, and the temperature detected by the temperature detection means drops sharply for clothes, such as sheets and towel racks, which tend to become a dango state, and for small amounts of clothing, the temperature drops. Since the number is small, the type of clothes or the state of the clothes in the rotating drum can be detected by the change in the temperature detected by the temperature detecting means.

The temperature detecting means is composed of first temperature detecting means for detecting the temperature inside the rotary drum and second temperature detecting means provided in the air blowing path of the heating means, and the control means is the clothes condition detecting step. Since the type of clothing or the state of clothing is determined based on the degree of change in the temperature difference between the temperature detected by the first temperature detection means and the temperature detected by the second temperature detection means in (1), When the type of clothes or the state of clothes in the rotating drum is detected in the clothes state detecting step in which the temperature is variably controlled to a high speed, the influence of the ambient temperature can be eliminated and the detection accuracy can be improved.

Further, the control means sets the rotational speed of the rotary drum to a low value at the start of the operation, and in the initial step of the drying operation until the temperature detected by the temperature detecting means becomes a set value or more, the temperature detected by the temperature detecting means is detected. Since the type of clothing or the state of clothing is judged by the operating time until the temperature exceeds the set value, the operating time until the temperature detected by the temperature detecting means becomes the set value or more in the initial step of the drying operation. It is possible to easily and surely discriminate between clothes or a small amount of clothes such as sheets, towels and towels that are likely to be dumped and clothes other than these.

The control means includes a current detection means for detecting the current of the heating means and a current comparison setting means for inputting the output of the current detection means, and the control means uses the output of the current comparison setting means for the rotary drum and the motor. The rotational speed of the rotary drum at the start of operation is controlled by controlling the set rotational speed or the set rotational cycle, and setting the rotational speed of the rotary drum to be low at the start of the operation to lower the current of the heating means. The number can be controlled by the current flowing through the PTC heater, the rotation speed of the blower unit interlocking with the rotating drum can be reduced, and an excessive inrush current can be prevented from flowing through the PTC heater.

Further, the control means sets the rotation speed of the rotating drum to a low value at the start of operation, and variably controls the rotation speed of the rotating drum from a low speed to a high speed when the temperature detected by the temperature detecting means exceeds a set value. The rotation speed of the rotating drum is increased because the state of the clothes is judged by controlling the operating time until the temperature exceeds the set value and the degree of change in the temperature detected by the temperature detecting means, and the rotating speed of the rotating drum is controlled. Depending on the type of clothes or the state of the clothes in the rotating drum, the rotating drum can be discriminated by the PTC heater on-time after controlling to Can be rotated and dried.

[Brief description of drawings]

FIG. 1 is a block diagram of a clothes dryer according to an embodiment of the present invention.

FIG. 2 is a sectional view of the clothes dryer.

[Fig. 3] (a) to (c) Operation time chart for drying sheets and the like of the clothes dryer.

[Fig. 4] (a) to (c) Operation time chart of the clothes dryer for drying a small amount of clothes

FIG. 5 is an operation flowchart of the clothes dryer.

FIG. 6 is a subroutine flowchart of the rotation speed control of the clothes dryer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotating drum 2 heat exchange type double-blade fan (blowing means) 3 PTC heater (heating means) 5 motor 6 temperature detecting means 7 rotation detecting means 9 control means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoji Akira 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Koyu Matsui, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd

Claims (6)

[Claims] 1. A rotary drum for drying clothes, a blower for circulating warm air into the rotary drum, a heating means provided in a blower path into the rotary drum, and the blower or the rotary drum. A motor that is rotationally driven, a rotation detection unit that detects the number of rotations or a rotation cycle of the rotary drum, the motor, etc., a temperature detection unit that detects the temperature inside the rotary drum or the intake air temperature of the heating unit, and the rotation of the motor. A control means for controlling the number or the heating means, wherein the control means controls the number of rotations of the rotary drum in accordance with a drying operation initial step, a clothes condition detecting step or a drying operation step, and in the clothes condition detecting step. A clothes dryer capable of detecting the type of clothes or the state of clothes by a change in the temperature detected by the temperature detecting means. 2. The control means controls the number of rotations of the rotary drum at high speed in the clothes condition detecting step, and determines the type of clothes depending on the degree of decrease in the temperature detected by the temperature detecting means from the temperature at the start of the clothes condition detecting step. The clothes dryer according to claim 1, wherein the condition of the clothes is determined. 3. The temperature detecting means comprises a first temperature detecting means for detecting the temperature inside the rotary drum and a second temperature detecting means provided in the air blowing path of the heating means, and the control means comprises a clothes condition detecting step. 2. The clothes drying method according to claim 1, wherein the type of clothes or the state of clothes is determined based on the degree of change in the temperature difference between the temperature detected by the first temperature detecting means and the temperature detected by the second temperature detecting means. Machine. 4. The control means sets the rotation speed of the rotary drum to a low value at the start of the operation, and in the initial step of the drying operation until the temperature detected by the temperature detection means becomes equal to or higher than a set value,
The clothes dryer according to claim 1, wherein the type of clothes or the state of the clothes is determined based on an operating time until the temperature detected by the temperature detecting means reaches or exceeds a set value. 5. A current detecting means for detecting the current of the heating means and a current comparing and setting means for inputting the output of the current detecting means, wherein the control means receives the output of the current comparing and setting means for the rotary drum and the motor. 2. The clothes dryer according to claim 1, wherein the rotation speed of the rotary drum is set to be low at the start of operation so that the current of the heating means is set to be low by controlling the set rotation speed or the set rotation cycle. 6. The control means sets a low rotational speed of the rotary drum at the start of operation, and variably controls the rotational speed of the rotary drum from a low speed to a high speed when the temperature detected by the temperature detection means exceeds a set value. The clothes drying according to claim 1 or 4, wherein the state of the clothes is judged based on the operating time until the temperature exceeds a set value and the degree of change in the temperature detected by the temperature detecting means, and the rotation speed of the rotating drum is controlled. Machine.