JP3322000B2 - Clothes dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clothes dryer for drying clothes by circulating warm air in a rotating drum.

[0002]

2. Description of the Related Art In recent years, clothes dryers have a function of drying blankets used in home life such as tuft blankets, Meyer blankets and baby blankets, and are widely used in daily life.

Conventionally, this type of clothes dryer has a configuration in which dried material is dried by heat generated by a plurality of positive characteristic temperature-sensitive resistance heaters (hereinafter, referred to as PTC heaters). In the case of drying a weakly dried product, a smaller number of PTC heaters are usually turned on than in the case of drying clothes in order to prevent cloth damage.

[0004]

However, such a conventional clothes dryer has a problem that the drying time is long when drying a blanket or the like, because the number of ON PTC heaters is usually smaller than when drying clothes. Was.

The present invention has been made to solve the above-mentioned problems, and even when drying clothes such as a blanket which is easily damaged , the degree of dryness of the dried material is independent of the ambient temperature at which the drying operation is performed.
Is correctly detected, and the drying operation is completed in an appropriate drying time.
The primary purpose is to be able to do so.

Further, while achieving the above first object, when using the clothes dryer in poor sealing condition of the drying efficiency, and a to eliminating the state of the undried second object.

Further, while achieving the above first or second object, by displaying the amount of heating of the PTC heater (heating means), and to inform the measure of current consumption to the user and the object of .

[0008]

SUMMARY OF THE INVENTION In order to achieve the first object, the present invention provides a rotating drum for drying clothes, a blowing means for circulating warm air into the rotating drum, and a rotating drum. Heating means provided in the blowing path, a motor for rotating the blowing means or the rotating drum, an operating means for input setting an operation course and the like, an operation control means for controlling the operation of the heating means and the motor, A rotating drum temperature detecting means for detecting a temperature inside the rotating drum ;
Ambient temperature detection means for detecting an ambient temperature , wherein the operation control means, after the start of the drying operation , when the temperature detected by the temperature detection means in the rotating drum exceeds a predetermined temperature Ta , the operation in the subsequent drying operation Turn on and off the heating means
To reduce the amount of heating by Rukoto, then the rotation Dora
The temperature detected by the temperature detection means in the system determines the predetermined temperature Ta
If the number of times is exceeded, from the start of drying
And the ambient temperature detecting means at the start of the drying operation.
The first problem solving means is to determine the drying time based on the detected ambient temperature .

[0009] In order to achieve the second object, the addition to the first problem solving means, the operation control means, the temperature sensed by the rotary drum temperature detecting means Jo Tokoro temperature Tc of Tokoro
Second, the remaining drying time is corrected based on the ambient temperature detected by the ambient temperature detecting means when the predetermined number of times is exceeded.
Means to solve the problem.

In order to achieve the third object, in addition to the first or second means for solving the above problems, there is provided a display means for displaying a heating amount of the heating means. A third problem solving means is to switch the display content of the display means when the temperature detected by the detecting means exceeds a predetermined temperature Ta .

[0011]

According to the first aspect of the present invention, even when a dried material such as a blanket which is severely damaged by a cloth is dried, the heating means is operated at the maximum heating amount immediately after the drying is started, so that the inside of the rotating drum can be dried. After the temperature in the rotary drum has reached a predetermined temperature (for example, 60 ° C.) in the rotating drum, the amount of heating by the heating means is reduced so that the hot air does not directly hit the dried material for a long time. , Can reduce the damage to the cloth ,
Irrespective of the degree of drying of the dried material,
The drying operation can be completed in a short drying time .

According to the second means for solving the problem, it is possible to detect whether or not the device is used in a closed room having poor drying efficiency based on the temperature detected by the ambient temperature detecting means. Dryness can be eliminated.

Further, according to the third problem solving means, since the display is made according to the heating amount of the heating means during the drying operation, it is possible to inform the user how much current is consumed.

[0014]

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

As shown in the figure, the rotating drum 1 stores and dries articles to be dried (clothing), and circulates warm air in the rotating drum 1 by means of a heat exchange type double-wing fan (blowing means) 2. The heat exchange type double-wing fan 2 circulates warm air in the rotating drum 1 and simultaneously takes in air from the outside to cool the fan and dehumidifies the circulating air in the rotating drum 1. P
The TC heater (heating means) 3 is composed of heaters 3a and 3b, and is disposed in a blowing path to the rotating drum 1, that is, in a circulating air intake to heat circulating air. Filter 4
Collect the lint in the rotating drum 1.

The motor 5 drives the rotating drum 1 and the heat exchange type double-blade fan 2 to rotate. By controlling the rotation speed of the motor 5, the rotation speed of the rotary drum 1 and the heat exchange type double-blade fan 2 can be controlled. , The amount of heat generated by the PTC heater 3 can be controlled, and current control can be performed. The temperature detecting means 6 is a PTC
It comprises a first thermistor (a rotating drum temperature detecting means) 6a for detecting the exhaust temperature of the heater 3 and a second thermistor 6b for detecting the suction temperature of the PTC heater 3.

The control means 9 is usually constituted by a microcomputer or the like, and includes an ambient temperature detecting means 10, an operation control means 11, a time measuring means 13, and the like. Operation display means 1
Reference numeral 4 denotes an operation means 15 for inputting and setting an operation course dedicated to the blanket, and a display means 16 for displaying a heating amount of the PTC heater 3 according to a control state of the operation control means 11.

When the temperature detected by the first thermistor 6a on the basis of the input setting of the operation means 15 exceeds a predetermined temperature Ta (for example, 60 ° C.), the operation control means 11 sets the PTC heater 3 in the subsequent drying operation. The setting is changed so that two are turned on from one. At this time, the display contents of the display means 16 are switched.

The output of the first thermistor 6a for detecting the temperature of the circulating air in the rotary drum 1 is input to the operation control means 11, and the output of the operation control means 11 causes the heater 3a,
By controlling relay contacts 17a and 17b connected to 3b respectively, the heaters 3a and 3b are turned on and off to control the temperature of the circulating air.

Further, the ambient temperature detecting means 10 detects the ambient temperature by inputting data from the second thermistor 6b, and the time measuring means 13 causes the first thermistor 6a to operate at a predetermined temperature Ta (60 ° C.) from the start of operation. ). The operation control means 11 receives data from the ambient temperature detecting means 10 and the time measuring means 13 and
The remaining drying time is determined according to the degree of drying of the object to be dried. The operation control means 11 includes a first thermistor 6
When the temperature detected by a exceeds the predetermined temperature a plurality of times,
The remaining drying time is corrected based on the ambient temperature detected by the ambient temperature detecting means 10.

After the operation for the remaining drying time,
All the loads are turned off via a relay contact 17 for turning on and off the PTC heater 3, a bidirectional thyristor 18 for turning on and off the motor 5, and a switching means 19 for shutting off the power supply, thereby terminating the drying operation.

The operation of the above configuration will be described with reference to FIGS. 3 and 4. First, the operation is started in step 20 of FIG. When the blanket is to be dried, the operating means 15 is set to a blanket-only course. In step 22, the drying operation is started. At this time, as shown in FIGS.
The operation is started with the heaters 3a and 3b both turned on. At this time, the display means 16 displays that two PTC heaters 3 are turned on, as shown in FIG. Then, the temperature Tin detected by the second thermistor 6b at this time is set as the ambient temperature.

After the start of the operation, at step 23, it is determined whether or not the temperature of the first thermistor 6a reaches a predetermined temperature Ta (60 ° C.). FIG. 4 shows the temperature of the first thermistor 6a.
As shown in (a), when the temperature exceeds the predetermined temperature Ta, the process proceeds to step 24, where the heater 3b among the PTC heaters 3 is turned off, and the setting is changed so that the heater 3a alone is turned on.

After that, until the drying operation is completed, FIG.
As shown in (c), the temperature detected by the first thermistor 6a is input to the operation control means 11 at a boundary between the predetermined temperatures Ta and Tb (62 ° C.), and the operation control means 11 And on / off control with hysteresis provided alternately. Further, as shown in FIG. 4 (d), thereafter, it changes the display on the number of PTC heater 3 of the display unit 16 to one.

[0025] In Step 2 5, the temperature of the first thermistor 6a to observe the time exceeding the predetermined temperature Ta again. When the temperature of the first thermistor 6a exceeds the predetermined temperature Ta, the operation control is performed based on the elapsed time t1 from the operation start time counted by the timer 13 to this time and the ambient temperature Tin detected by the second thermistor 6b at the start of operation. enter the means 11 estimates the degree of dryness blanket at this point, in step 2 6, of the remaining drying time should extent continues after drying time t2
To determine.

The temperature T of the second thermistor 6b at this point is checked whether it is used in a closed place with poor drying efficiency.
h is input to the operation control means 11 and detected. If the temperature Th is higher than the predetermined temperature Tc (50 ° C.), the environment in which the dryer is used is a closed place, and the remaining drying time t2 is corrected. For example, a uniform time t3 (constant time) is added to the remaining drying time t2.

[0027] determines whether it is remaining drying time has ended in Step 2 7, if the drying time is completed, and outputs the two-way thyristor 18, the relay contact 17 and the switching unit 19, and turn off all loads dried End the operation.

In the above embodiment, when the temperature detected by the first thermistor 6a exceeds the predetermined temperature Ta, the number of the PTC heaters 3 to be turned on in the subsequent drying operation is changed to reduce the heating amount of the PTC heaters 3. Although it is reduced, the amount of heating of the PTC heater 3 may be reduced by controlling the rotation speed of the heat exchange type double-blade fan 2 to change the amount of warm air circulated in the rotating drum 1. Needless to say.

[0029]

As described above, the present invention provides a rotating drum for drying clothes, a blowing means for circulating warm air into the rotating drum, and a heating means provided on a blowing path to the rotating drum. A motor that rotationally drives the blowing unit or the rotating drum, and an operating unit that inputs and sets an operation course and the like,
Operation control means for controlling the operation of the heating means and the motor; temperature detection means in the rotary drum for detecting the temperature in the rotary drum; and ambient temperature detection means for detecting the ambient temperature
The operation control means is configured to, after the start of the drying operation , change the temperature detected by the temperature detection means in the rotary drum to a predetermined temperature T
a , the heating means in the subsequent drying operation
ON, to reduce the amount of heating by off control, its
After that, the temperature detected by the temperature detecting means in the rotating drum is
When the temperature exceeds a predetermined temperature Ta a predetermined number of times, when the drying operation is started
And the time when the drying operation starts
Drying time depends on the ambient temperature detected by the ambient temperature detector.
It is so arranged to determine, even when drying the intense drying of fabric damage, such as blankets, by increasing the heating amount of the heating means from immediately after the start dried raised quickly the temperature in the rotary drum to reach a predetermined temperature after, by reducing the heating amount of the heating means, since the hot air to the drying object is no longer possible to directly hits long, it is possible to suppress the fabric damage, moreover,
Regardless of the ambient temperature at which the drying operation is performed,
The drying operation can be completed in an appropriate drying time
Can be completed .

Further, the operation control means, when the temperature detected by the rotary drum temperature detecting means exceeds a predetermined number of times Jo Tokoro temperature Tc, so as to correct the remaining drying time the ambient temperature detected by the ambient temperature detecting means Therefore, it is possible to detect whether or not the clothes dryer is used in a closed state with poor drying efficiency based on the temperature detected by the ambient temperature detecting means, so that the drying time can be extended and the undried state can be eliminated. .

Further, display means for displaying the heating amount of the heating means is provided. When the temperature detected by the temperature detection means in the rotating drum exceeds a predetermined temperature Ta , the operation control means displays the contents of the display means. Since it is switched, the heating amount of the heating means can be accurately displayed during the drying operation,
It is possible to inform the user how much current is being consumed.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of a clothes dryer according to one 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 an operation time chart of the clothes dryer.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotating drum 2 heat exchange type double-wing fan (blowing means) 3 PTC heater (heating means) 5 motor 6a first thermistor (rotating drum temperature detecting means) 11 operation control means 15 operating means

Continuation of front page (56) References JP-A-3-109100 (JP, A) JP-A-3-66398 (JP, A) JP-A-58-182077 (JP, A) JP-A-6-182097 (JP) JP-A-4-288199 (JP, A) JP-A-5-115694 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 58/00-58/28

Claims (3)

(57) [Claims] 1. A rotating drum for drying clothes, blowing means for circulating warm air into the rotating drum, heating means provided in a blowing path into the rotating drum, and rotating the blowing means or the rotating drum. A motor to be driven, operation means for inputting and setting an operation course, etc .; operation control means for controlling the operation of the heating means and the motor; temperature detection means for detecting the temperature inside the rotary drum ; Warm
Ambient temperature detecting means for detecting the temperature, when the temperature detected by the temperature detecting means in the rotating drum exceeds a predetermined temperature Ta after the start of the drying operation , the operation control means Control the means on and off
To reduce the amount of heating , and then
The temperature detected by the temperature detecting means reaches a predetermined temperature Ta a predetermined number of times.
From the start of the drying operation to the time
Time and ambient temperature detection means at the start of drying operation
A clothes dryer in which the drying time is determined according to the ambient temperature . Wherein the operation control means, when the temperature detected by the rotary drum temperature detecting means exceeds a predetermined number of times Jo Tokoro temperature Tc, so as to correct the remaining drying time the ambient temperature detected by the ambient temperature detecting means The clothes dryer according to claim 1 . 3. A display means for displaying the amount of heating of the heating means, wherein the operation control means displays the contents of the display means when the temperature detected by the temperature detection means in the rotating drum exceeds a predetermined temperature Ta. 3. The method according to claim 1, wherein the switching is performed.
The clothes dryer as described.