JPH06134192A - Clothes drier - Google Patents

Abstract

PURPOSE:To dry even fibers, such as chemical fibers and blankets of a cloth significantly damaged, without giving damages to the cloth damaged by using the clothes drier which dries clothes by circulating hot air into a rotary drum to be rotationally driven by a motor. CONSTITUTION:The hot air is circulated by a heat exchange type double winged fan into the rotary drum 1 for drying the clothes. The blast route into the rotary drum 1 is provided with a PTC heater 3. The rotary drum 1 and the heat exchange type double winged fan are rotationally driven by the motor 5. The rotating speed of the rotary drum 1 is detected by a rotation detecting means 7. The temp. of the circulating air is detected by a temp. detecting means 6 for detecting the temp. in the rotary drum 1. The rotating speed of the motor 5 and the PTC heater 3 are controlled by a control means 9. An operation control means 20 for operating, setting and displaying plural kinds of operation courses, etc., is connected to the control means 9. This operation display means 20 is capable of setting the operation course of the rotating speed at which the operating speed of the rotary drum 1 is lower than an ordinary rotating speed.

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 come into widespread use, and there is a demand for being able to dry clothes without damaging them regardless of the type 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 a fiber such as a synthetic fiber or a blanket, which is easily worn when a mechanical force is applied at a high temperature, is dried, the cloth is greatly damaged and is more than necessary. Had the problem of having to pay attention to.

The present invention has been made to solve the above problems, and an object of the present invention is to make it possible to dry fibers such as synthetic fibers and blankets which have large damage to the cloth without causing damage to the cloth.

[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. A heating means provided on the motor, a motor for rotating the blower means or the rotating drum, a rotation detecting means for detecting the number of rotations or a rotation cycle of the rotating drum, the motor, etc., and a temperature for detecting the temperature inside the rotating drum. Detecting means, a control means for controlling the number of rotations of the motor or the heating means, and an operation display means connected to the control means for operating setting display of a plurality of types of driving courses and the like, the operation display means, The first problem-solving means is to set an operation course in which the rotation speed of the rotary drum is lower than the normal rotation speed.

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, when the set rotation cycle is controlled and the operation course of the rotation speed lower than the normal rotation speed is set by the operation display means, the upper limit value of the set rotation speed is set lower than the normal operation or the lower limit value of the setting cycle is set to the normal value. The second problem solving means is to set the time longer than the operation.

Further, the control means of the first problem solving means controls the internal temperature of the rotating drum in accordance with the output of the temperature detection means when the operation display means sets a driving course at a rotational speed lower than the normal rotational speed. The third problem solving means is that the control is performed at a lower level than in normal operation.

[0009]

According to the first means for solving the above problems, the present invention provides:
When the operation display means sets an operation course with a rotational speed lower than the normal rotational speed, the rotational speed of the rotating drum can be reduced to reduce the mechanical force applied to the material to be dried, and fibers with large fabric damage such as synthetic fibers and blankets. Even if it is, the cloth can be dried without damage.

Further, according to the second means for solving the problem, the rotation speed of the motor can be controlled in accordance with the current of the heating means to control the amount of air circulated to the rotating drum, and the rotation speed is lower than the normal rotation speed. When the number of operating courses is set, the maximum rotational speed of the rotating drum or the maximum circulating air volume can be made lower than during normal operation, and the cloth can be dried without damage.

Further, according to the third means for solving the problem, when the operating course of the rotational speed of the rotary drum is set lower than the normal rotational speed, the temperature of the warm air circulated to the rotary drum can be set low, and Even with fibers such as blankets that have large damage, they can be dried without damage.

[0012]

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, a 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 detection means 6 detects the exhaust temperature according to the temperature inside the rotary drum 1, and is attached to the exhaust port of the rotary drum 1.

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. Further, the output of the temperature detecting means 6 for detecting the temperature of the circulating air to the rotary drum 1 is input to the temperature control means 16, and the output of this temperature control means 16 causes the PTC heaters 3a, 3a and 3c.
The relay contacts 17a and 17b respectively connected to b are controlled, and the PTC heaters 3a and 3b are turned on / off to control the temperature of the circulating air.

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.
The operation display means 20 is connected to the control means 9 to perform operation setting display of a plurality of types of driving courses and the like, and is input to the rotation speed setting means 10 so that the rotation speed of the rotary drum 1 is lower than the normal rotation speed. The operating course (synthetic fiber course) of (1) can be set, and when the synthetic fiber course is set by inputting it to the temperature control means 16, the temperature in the rotary drum 1 is set to be lower than that in the normal operation according to the output of the temperature detecting means 6. I try to control it low.

The operation of the above structure will be described with reference to FIGS. 3 and 4. FIG. 3 is an operation flowchart of an embodiment of the present invention. The operation is started at step 30, initialized at step 31, and then step 32. Operation display means 2
Accept 0 input key. When the start key is turned on in step 33, the process proceeds to step 34, where it is determined whether or not the synthetic fiber course is set. If the synthetic fiber course is set, the process proceeds to step 35 and the normal rotation speed (45 rp) is set.
m) set to a lower rotation speed (for example, 42 rpm). After that, the process proceeds to step 36, and the temperature control temperature of the PTC heater 3 is set to a temperature (61 ° C) lower than the normal temperature (69 ° C).
Set to C). Then, in step 37, the motor 5 is turned on, and in step 38, the heater 3 is turned on.

Next, in step 39, the electric current of the PTC heater 3 is detected to control the set rotational speed of the motor 5, and in step 40 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.

At 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 (in this case, the maximum cycle of the low speed rotation speed (42 rpm)), and the cycle T
If s is larger than the maximum period Tsmax, the routine proceeds to step 56, where the maximum period Tsmax is set as the set period. If the cycle Ts is smaller than the maximum cycle Tsmax, the routine proceeds to step 57, where the calculated and set cycle Ts is set to the minimum cycle Tsmin (low speed rotation speed (42
rpm) minimum cycle) and cycle Ts is minimum cycle Ts
If it is smaller than min, the process proceeds to step 58 and the minimum period Ts
The process proceeds to step 59 with min as the set cycle. 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 smaller than the maximum cycle Tsmax and the minimum cycle Tsmin.
It is set larger.

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 to determine whether the detected error is within the set range. If it is within the set range, the next step (step of FIG. 3). Proceed to 41). 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 step 41 of FIG. 3, the temperature control means 1
The PTC heater 3 is controlled by 6 to control the temperature inside the rotary drum 1 detected by the temperature detecting means 6 to be the temperature set in step 36, and the process proceeds to step 42.
When the drying is completed by repeating steps 39 to 42, all the operations are completed.

As described above, according to this embodiment, the motor 5
Control means 9 for controlling the number of revolutions of PTC heater 3 or PTC heater 3
And a temperature detecting means 6 for detecting the temperature inside the rotary drum 1.
And an operation display unit 20 which is connected to the control unit 9 and displays operation settings of a plurality of types of operation courses, and the operation display unit 20 operates at a rotational speed of the rotary drum 1 lower than a normal rotational speed. The course can be set, and when the operation display means 20 sets the operation course of the rotation speed lower than the normal rotation speed, the control means 9 normally operates the internal temperature of the rotary drum 1 according to the output of the temperature detection means 6. Since it is controlled to be lower, the rotary drum 1 according to the material to be dried
It can be dried at the number of revolutions and the temperature of the circulating air, and even fibers with large fabric damage such as synthetic fibers and blankets can be dried without fabric damage.

In the above embodiment, the case where the rotary drum 1 and the heat exchanging type double-blade fan 2 are driven by one motor 5 has been described, but the same effect can be obtained by using two motors each. is there.

[0023]

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. A heating means provided on the motor, a motor for rotating the blower means or the rotating drum, a rotation detecting means for detecting the number of rotations or a rotation cycle of the rotating drum, the motor, etc., and a temperature for detecting the temperature inside the rotating drum. Detecting means, a control means for controlling the number of rotations of the motor or the heating means, and an operation display means connected to the control means for operating setting display of a plurality of types of driving courses and the like, the operation display means, Since the rotation course of the rotating drum can be set to a rotation number lower than the normal rotation number, the rotation number of the rotating drum is lower than the normal rotation number. When setting the over scan, can reduce the mechanical force applied to the material to be dried, chemical fiber, even cloth damage is large fibers such as blankets can be dried without fabric damage.

Further, it comprises 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 receives the output of the current comparison setting means for the rotary drum and the motor. When setting the operation course of the rotation speed lower than the normal rotation speed by controlling the set rotation speed or the set rotation cycle such as, the upper limit value of the set rotation speed is set lower than the normal operation or the set cycle. Since the lower limit value of is set to be longer than that of normal operation, the amount of air circulated to the rotating drum can be controlled according to the current of the heating means, and the operation course of the rotation speed lower than the normal rotation speed can be set. In this case, the maximum number of rotations of the rotary drum or the maximum amount of circulating air can be made lower than in normal operation, and the cloth can be dried without damage.

Further, when the operation display means sets the operation course of the rotation speed lower than the normal rotation speed, the control means controls the temperature in the rotary drum to be lower than the normal operation in accordance with the output of the temperature detection means. Therefore, when setting the operation course of the rotation speed of the rotating drum lower than the normal rotation speed, the temperature of the warm air circulated to the rotating drum can be lowered, and the fibers such as synthetic fibers and blankets have large damage to the cloth. Even if the cloth is not damaged, it can be 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 is an operation flowchart of the clothes dryer.

FIG. 4 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 detection means 7 rotation detection means 9 control means 20 operation display means

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

Claims (3)

[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 rotation drum, the motor, and the like, a temperature detection unit that detects the temperature inside the rotation drum, and a rotation number of the motor or the heating unit is controlled. And a display unit for operating and displaying a plurality of types of driving courses, which are connected to the control unit, and the operation display unit is configured such that the rotation speed of the rotary drum is lower than a normal rotation speed. Clothes dryer that can set the driving course. 2. 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 uses the output of the current comparing and setting means for the rotary drum and the motor. When setting the operating speed of the rotational speed lower than the normal rotational speed by the operation display means by controlling the setting rotational speed or the setting rotational cycle such as
The clothes dryer according to claim 1, wherein the upper limit value of the set rotation speed is set lower than that in normal operation, or the lower limit value of the set cycle is set longer than that in normal operation. 3. The control means controls the internal temperature of the rotary drum to be lower than the normal operation in accordance with the output of the temperature detection means when the operation display means sets the operation course of the rotation speed lower than the normal rotation speed. The clothes dryer according to claim 1.