JPH0824497A - Clothes dryer - Google Patents

Abstract

(57) [Summary] [Purpose] In a clothes dryer that circulates warm air in a rotating drum to dry clothes, the drying time may be too long even when drying clothes such as blankets that are easily damaged. So that there is no [Structure] Warm air is circulated in a rotary drum for drying clothes by a heat exchange type double-blade fan, a PTC heater 3 is provided in a blowing path to the rotary drum, and the temperature in the rotary drum is detected by a first thermistor 6a. To do. The motor 5 rotationally drives the heat exchanging type double-blade fan or the rotating drum, inputs and sets the operation course and the like by the operating means 15, and the PTC heater 3
And the operation of the motor 5 is controlled by the operation control means 11.
When the temperature detected by the first thermistor 6a exceeds the predetermined temperature based on the input setting of the operation unit 15, the operation control unit 11 reduces the heating amount of the PTC heater 3 in the subsequent drying operation.

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 rotary drum.

[0002]

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

Conventionally, this kind of clothes dryer is configured to dry the dried material by heat generated by a plurality of positive temperature-sensitive resistance heaters (hereinafter referred to as PTC heaters). When drying a weak dried material, in order to prevent damage to the cloth, a smaller number of PTC heaters are usually turned on than when drying clothes.

[0004]

However, such a conventional clothes dryer has a problem in that when a blanket or the like is dried, the number of PTC heaters turned on is smaller than in the case where clothes are usually dried, and thus the drying time is long. Was.

The present invention is intended to solve the above problems, and it is a first object of the present invention to prevent the drying time from becoming too long even when drying clothes such as blankets that are easily damaged.

In addition to achieving the first object, the second method is to inform the user of the standard of current consumption by displaying the heating amount of the PTC heater (heating means).
The purpose is.

In addition to achieving the first object, it is possible to accurately detect the degree of dryness of the dried product regardless of the ambient temperature at which the drying operation is performed, and to finish the drying operation in an appropriate drying time. It has a third purpose.

A fourth object of the present invention is to achieve the above-mentioned first object and to eliminate the undried state when the clothes dryer is used in a closed state where the drying efficiency is not good.

[0009]

In order to achieve the first object of the present invention, a rotary drum for drying clothes, a blowing means for circulating warm air into the rotary drum, and a rotary drum for rotating the rotary drum are provided. Heating means provided in the air blowing path, a motor for rotationally driving the air blowing means or the rotating drum, operation means for inputting and setting an operation course, and operation control means for controlling the operation of the heating means and the motor, A temperature detecting means for detecting the temperature in the rotating drum, wherein the operation control means has a temperature detected by the temperature detecting means in the rotating drum based on an input setting of the operating means exceeds a predetermined temperature. In this case, the first problem solving means is to reduce the heating amount of the heating means in the subsequent drying operation.

In order to achieve the second object, in addition to the means for solving the first problem, a display means for displaying the heating amount of the heating means is provided, and the operation control means is the temperature detecting means in the rotary drum. When the temperature detected by exceeds the specified temperature,
A second problem solving means is that the display contents of the display means are switched.

In order to achieve the third object, in addition to the means for solving the first problem, from the start of the drying operation until the temperature detected by the temperature detecting means in the rotating drum exceeds a predetermined temperature a predetermined number of times. The operation control means is provided with a time measuring means for measuring time and an ambient temperature detecting means for detecting ambient temperature, and the operation control means remains dry depending on the time measured by the time measuring means and the ambient temperature detected by the ambient temperature detecting means at the start of operation. The third problem solving means is to determine the time.

Further, in order to achieve the fourth object, the operation control means of the third problem solving means has an ambient temperature when the temperature detected by the temperature detecting means in the rotating drum exceeds a predetermined temperature a plurality of times. The fourth problem solving means is to correct the remaining drying time based on the ambient temperature detected by the detecting means.

[0013]

According to the present invention, by means of the first means for solving the problems described above, even in the case of drying a dry material such as a blanket which is severely damaged, by operating the heating means at the maximum heating amount immediately after the start of drying, The temperature is rapidly raised, and after the temperature in the rotary drum reaches a predetermined temperature (for example, 60 ° C.), by reducing the heating amount of the heating means, hot air does not directly hit the dried material for a long time. In addition, it is possible to prevent the cloth from being damaged and to shorten the drying time.

Further, according to the second means for solving problems, 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.

Further, according to the third means for solving the problems, the drying degree of the dried product can be accurately detected regardless of the ambient temperature at which the drying operation is carried out, so that the drying operation can be finished in an appropriate drying time.

Further, according to the fourth problem solving means, it can be detected from the temperature detected by the ambient temperature detecting means whether or not it is used in a closed room in which the drying efficiency is not good, so that the drying time is not increased. The dry state can be eliminated.

[0017]

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 storing and drying an article to be dried (clothes), and a hot air inside the rotary drum 1 is circulated 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 composed of heaters 3a and 3b, and is arranged in the air blowing path to the rotary drum 1, that is, in the circulating air intake port to heat the circulating air. Filter 4 is
The yarn waste in the rotating drum 1 is collected.

The motor 5 rotationally drives the rotary drum 1 and the heat exchange type double-blade fan 2. By controlling the rotation number of the motor 5, the rotation numbers of the rotary drum 1 and the heat exchange double-blade fan 2 can be controlled. , The amount of heat generated by the PTC heater 3 can be controlled, and the current can be controlled. The temperature detecting means 6 is a PTC
It is composed of a first thermistor (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 composed of a microcomputer and the like, and is provided with an ambient temperature detection means 10, an operation control means 11, a clocking means 13 and the like. Operation display means 1
Reference numeral 4 is composed of an operating means 15 capable of inputting and setting an operation course exclusively for the blanket, and a display means 16 displaying the heating amount of the PTC heater 3 according to the control state of the operation control means 11.

When the temperature detected by the first thermistor 6a exceeds the predetermined temperature Ta (for example, 60 ° C.) on the basis of the input setting of the operating means 15, the operation control means 11 causes the PTC heater 3 in the subsequent drying operation. The setting is changed so that one is turned on from the state where two are turned on. At this time, the display content of the display means 16 is 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,
The relay contacts 17a and 17b respectively connected to 3b are controlled, the heaters 3a and 3b are turned on / off, and the temperature of the circulating air is controlled.

Further, the ambient temperature detecting means 10 inputs the data from the second thermistor 6b to detect the ambient temperature, and the clocking means 13 keeps the first thermistor 6a at a predetermined temperature Ta (60 ° C.) from the start of operation. ) Until the time is reached. The operation control means 11 inputs the data from the ambient temperature detection means 10 and the time measurement means 13, and the rotary drum 1
The remaining drying time is determined according to the drying degree of the material to be dried. In addition, the operation control means 11 uses the first thermistor 6
When the temperature detected by a exceeds the predetermined temperature multiple times,
The remaining drying time is corrected by the ambient temperature detected by the ambient temperature detecting means 10.

After operating for the remaining drying time,
All the loads are turned off through the relay contact 17 that turns on and off the PTC heater 3, the bidirectional thyristor 18 that turns on and off the motor 5, and the switching means 19 that shuts off the power source, and the drying operation is terminated.

The operation of the above structure will be described with reference to FIGS. 3 and 4. First, the operation is started in step 20 of FIG. 3, and the operation course is selected by the operation means 15 in step 21. When the blanket is dried, the operation means 15 sets the blanket course. In step 22, the drying operation is started. At this time, as shown in FIGS. 4 (b) and (c),
The operation is started with the heaters 3a and 3b both turned on. Further, the display means 16 at this time displays that two PTC heaters 3 are turned on, as shown in FIG. 4 (d). Then, the temperature Tin detected by the second thermistor 6b at this time is set to the ambient temperature.

After the start of operation, it is determined in step 23 whether or not the temperature of the first thermistor 6a reaches a predetermined temperature Ta (60 ° C.). The temperature of the first thermistor 6a is shown in FIG.
As shown in (a), when the temperature exceeds the predetermined temperature Ta, the routine proceeds to step 24, where the heater 3b of the PTC heaters 3 is turned off and the heater 3a is turned on by one heater 3a.

Thereafter, until the drying operation is completed, as shown in FIG.
As shown in (c), the temperature detected by the first thermistor 6a is input to the operation control means 11 at a predetermined temperature Ta and Tb (62 ° C.), and the operation control means 11 causes the heater 3a and the heater 3b. ON and OFF control is performed with a hysthesis provided alternately. Further, as shown in FIG. 4D, thereafter, the display of the ON number of the PTC heaters 3 of the display means 16 is changed to one.

In step 35, the time when the temperature of the first thermistor 6a exceeds the predetermined temperature Ta is observed again. When the first thermistor 6a exceeds the predetermined temperature Ta, the operation control of the elapsed time t1 from the operation start time measured by the time measuring means 13 to this time and the ambient temperature Tin detected by the second thermistor 6b at the time of operation start It is input to the means 11 and the degree of drying of the blanket at this time is estimated, and in step 36, the remaining drying time t2 of how much the drying time should be continued thereafter.
To decide.

Further, it is determined whether the temperature of the second thermistor 6b at this time is the temperature T of the second thermistor 6b or not whether it is used in a closed place where the drying efficiency is poor.
The h is input to the operation control means 11 and detected. When 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.

In step 37, it is judged whether or not the remaining drying time is over, and when the drying time is over, it is output to the bidirectional thyristor 18, the relay contact 17, and the switching means 19, and all the loads are turned off to carry out the drying operation. To finish.

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

[0032]

As described above, according to the present invention, a rotating drum for drying clothes, an air blowing unit for circulating warm air into the rotating drum, and a heating unit provided in an air blowing path into the rotating drum, A motor for rotationally driving the blower means or the rotary drum, and an operation means for inputting and setting a driving course,
An operating control means for controlling the operation of the heating means and the motor, and a rotating drum internal temperature detecting means for detecting the temperature in the rotating drum are provided, and the operating control means is based on an input setting of the operating means. When the temperature detected by the temperature detecting means in the rotating drum exceeds a predetermined temperature, the heating amount of the heating means is reduced in the subsequent drying operation, so that a dried product such as a blanket that is severely damaged by cloth is dried. Even if the heating amount of the heating means is increased immediately after the start of drying to quickly raise the temperature in the rotating drum, and after reaching a predetermined temperature, the heating amount of the heating means is decreased to keep hot air in the dried product. Since it does not hit the time directly, the damage to the cloth can be suppressed and the drying time can be shortened.

The operation control means switches the display content of the display means when the temperature detected by the temperature detecting means in the rotating drum exceeds a predetermined temperature. Therefore, the heating amount of the heating means can be accurately displayed during the drying operation, and the user can be informed of how much current is being consumed.

Further, there are provided a time measuring means for measuring a time from the start of the drying operation until the temperature detected by the temperature detecting means in the rotating drum exceeds a predetermined temperature for a predetermined number of times, and an ambient temperature detecting means for detecting an ambient temperature. The operation control means determines the remaining drying time based on the time measured by the time measuring means and the ambient temperature detected by the ambient temperature detecting means at the start of the operation. Since the degree of dryness can be accurately detected, the drying operation can be completed within an appropriate drying time.

Further, the operation control means corrects the remaining drying time by the ambient temperature detected by the ambient temperature detection means when the temperature detected by the temperature detection means in the rotating drum exceeds the predetermined temperature a plurality of times. Since the temperature detected by the ambient temperature detection means can detect whether the clothes dryer is used in a sealed state with poor drying efficiency,
The drying time can be extended to eliminate the undried state.

[Brief description of drawings]

FIG. 1 is a block circuit 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] Operation time chart of the clothes dryer

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotary drum 2 heat exchange type | mold double-blade fan (blowing means) 3 PTC heater (heating means) 5 motor 6a 1st thermistor (rotating drum temperature detection means) 11 operation control means 15 operation means

Claims (4)

[Claims] 1. A rotating drum for drying clothes, a blowing unit for circulating warm air into the rotating drum, a heating unit provided in a blowing path into the rotating drum, and a rotating unit for rotating the blowing unit or the rotating drum. A driving motor, an operating means for inputting and setting a driving course, etc., a driving control means for controlling the operations of the heating means and the motor, and a rotating drum internal temperature detecting means for detecting a temperature inside the rotating drum. ,
When the temperature detected by the temperature detecting means in the rotating drum exceeds a predetermined temperature based on the input setting of the operating means, the operation control means reduces the heating amount of the heating means in the subsequent drying operation. Clothes dryer. 2. The display means for displaying the heating amount of the heating means is provided, and the operation control means switches the display contents of the display means when the temperature detected by the temperature detecting means in the rotating drum exceeds a predetermined temperature. The clothes dryer according to claim 1, wherein 3. A time measuring means for measuring the time from the start of the drying operation until the temperature detected by the temperature detecting means in the rotating drum exceeds a predetermined temperature for a predetermined number of times, and an ambient temperature detecting means for detecting the ambient temperature, The clothes dryer according to claim 1, wherein the operation control means determines the remaining drying time based on the time measured by the time measuring means and the ambient temperature detected by the ambient temperature detecting means at the start of the operation. 4. The operation control means is adapted to correct the remaining drying time by the ambient temperature detected by the ambient temperature detection means when the temperature detected by the rotary drum internal temperature detection means exceeds a predetermined temperature a plurality of times. Item 3. A clothes dryer.