JP2664559B2 - 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.

[0002]

2. Description of the Related Art Conventionally, in this kind of clothes dryer, as shown in, for example, Japanese Patent Application Laid-Open No. 62-97600, an air blowing operation for cooling a rotating drum after the completion of heating and drying, a so-called cool down, is used to cool clothes. It was constant regardless of the amount. Therefore, according to this conventional example, when the amount of clothing is small, the blowing operation is continued even after the clothing is sufficiently cooled by the blowing operation, and wasteful power consumption is performed. On the other hand, when the amount of clothing is large, There is a drawback that the blowing operation ends without being sufficiently cooled, and the user must take out hot clothing.

[0003]

SUMMARY OF THE INVENTION According to the present invention, the air-blowing operation after the end of heating and drying is completed in a proper operation time according to the amount of clothing. It is an object of the present invention to provide an easy-to-use clothes dryer that consumes no electric power and does not end the air blowing operation while cooling the clothes.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a rotating drum into which clothes are put,
A blowing means for feeding dry air into the transfer drum;
Heating means for heating the drying air sent into the ram.
For example, performs a heat drying for drying the clothes by feeding drying air heated to the rotation within the drum, after the heat-drying is complete, the only blowing operation by stopping the heating means lines
Line cooldown to cool the clothes of the rotating the drum have
In the clothes dryer , the clothes in the rotating drum are dried.
Detecting means for detecting the degree of dryness
Count the time to reach a steady state and count this
Determine the ventilation operation time according to the time, and cool down
Sometimes, the blowing means is driven for the determined blowing operation time.
Control means.

[0005]

According to the above construction, it changes according to the amount of clothing.
Counts the time until the degree of drying reaches the specified state
Since the blowing operation time is determined according to the count time , after the heating operation is completed, the blowing operation is performed for an appropriate time according to the amount of clothing.

[0006]

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

The machine frame 2 of the clothes dryer 1 is provided with a clothes inlet 3 at the center of the front part thereof, and a rear face plate 6 provided with an outside air inlet 4 and an outlet 5 at the rear thereof. . The inlet 3 is opened and closed by rotating a resin door 7 in the left-right direction.

In the machine frame 2, a resin-made, horizontal-axis type rotary drum 8 is rotatably supported at its front inner peripheral edge on an outer peripheral edge of an annular drum support plate 9 through felt or the like.
The center of the rear surface is rotatably supported by the support shaft 10.

The drum support plate 9 is fixed to the rim of the charging port 3, and the support shaft 10 is connected to the rear plate 6 at the rear of the machine frame 2 and the support plate 11 laid laterally inside the rear plate 6. Fixed.

A fan chamber 13 covered by a fan casing 12 is formed between the support plate 11 and the rear panel 6, and the fan chamber 13 is partitioned by a partition member 14.

In the central opening 15 of the partition member 14,
A synthetic resin double-sided fan 16 having vanes on the front and rear surfaces is rotatably supported on the support shaft 10 and housed therein. The outer peripheral portion 17 of the double-sided fan 16 is covered with an annular cover 18 formed on the inner peripheral edge of the central opening 15.
8 is loosely fitted in a non-contact state by labyrinth connection. The partition member 14 and the double-sided fan 16 divide the fan chamber 13 into a drying air path 19 on the front side of the double-sided fan 16 and a cooling air path 20 on the rear side.

A circulation duct 22 is provided in the drying air passage 19 so as to communicate with an inlet 21 to the rotary drum 8 provided at one lower side of the drum support plate 9. Rotating drum 8
The drying air passage 1 of the fan chamber 13 is
9 is provided, and this outlet 23 is sealed.
Material 24 is enclosed. The cooling air passage 20 is connected to the inlet 4
And the outlet 5 communicates with the outside of the machine casing 2. The two-sided fan 16 and the partition member 14 constitute a dehumidifying device that dehumidifies by exchanging dry air with outside air.

In the circulation duct 22 near the inlet 21, a semiconductor heater 25 having a positive temperature resistance characteristic made of a ceramic material in a honeycomb shape is provided, and at the bottom of the circulation duct 22, a drain port communicating with the outside of the machine frame 2 is provided. 26, a lint filter 27 for covering the outlet 23 is provided in the rotary drum 8 in a detachable manner, and the rotary drum 8 and the double-sided fan 16 rotate the drum belt 29 and the fan belt 30 by the rotational force of a motor 28. Is transmitted via the Internet.

On the support plate 11 downstream of the lint filter 27 and the outlet 23, a first temperature detecting element 31 for detecting the temperature of the dry air before dehumidification is disposed. On the upstream side, a second temperature detecting element 32 for detecting the temperature of the dry air after dehumidification by heat exchange with the outside air
And a semiconductor heater 25 located downstream of the semiconductor heater 25 in the circulation duct 22 and an inlet 21.
A third temperature detecting element 33 for detecting the temperature of the reheated drying air is disposed between the third temperature detecting elements 33. The first temperature detecting element 31 measures the drum outlet temperature K1, the second temperature detecting element 32 measures the heater inlet temperature K2, and the third temperature detecting element 33 measures the heater outlet temperature K3. Then, the first temperature detecting element 31
Corresponds to the heat-sensitive means of the present invention.

FIG. 2 is a schematic circuit block diagram of a control circuit. Referring to FIG. 2, reference numeral 34 denotes a microcomputer (microcomputer) serving as drying control means, and 35 denotes a start button and the like. The input key circuits are arranged, 36 is a door switch, 37 is a display unit for displaying an operation status, 31, 32, and 33 are the first, second, and third temperature detecting elements described above. Reference numeral 38 denotes a power frequency synchronization signal detection circuit which detects a zero cross of an AC voltage of a commercial frequency and sends it to the microcomputer 34. 39 is a power supply circuit. Reference numeral 40 denotes a clock oscillating circuit which uses a clock as an operating clock for the microcomputer 34 to advance a program and count time. A reset circuit 41 resets a program in the microcomputer 34 to an initial state when a power switch is pressed. Reference numeral 42 denotes a load drive circuit which controls on / off of the motor 28 and the semiconductor heater 28 by a control output from the microcomputer 34. Reference numeral 43 denotes a buzzer circuit for notifying the end of the drying operation and the like.

Thus, when the start key is operated,
The microcomputer 34 operates the motor 28 and the semiconductor heater 25, and the operation of the motor 28 rotates the rotating drum 8 and the double-sided fan 16 to heat the semiconductor heater 25. The drying air in the rotating drum 8 is passed through the lint filter 27 and the outlet 2
3. Circulating side of double-sided fan 16, circulation duct 22, semiconductor heater 25, inlet 21, rotating drum 8 circulate in this order, and external air (outside air) is introduced into inlet 4, cooling side of double-sided fan 16, and outlet 5 Flow in order. Most of the lint generated in the drying operation in the rotating drum 8 is removed by the lint filter 27. The high-temperature and high-humidity drying air exchanges heat with the outside air by the double-sided fan 16, is cooled to condense the water, and is then reheated by the semiconductor heater 25 and continuously supplied to the rotating drum 8. The condensed water is discharged from the drain port 26.

Next, the drying operation will be described with reference to FIG. 3 which shows a flowchart for explaining the operation of the program stored in the microcomputer 34.

From the start of the drying operation, the microcomputer 34 starts time counting, operates as a time measuring means, and detects the temperature detected by the first temperature detecting element 31 (drum outlet temperature K1) 15 minutes after the start of the drying operation. Second temperature detecting element 32
A is set as the temperature difference from (heater inlet temperature K2), and B is set as the temperature difference during the subsequent drying operation.

After that, the drying operation is continued. When the drying degree reaches a state where B ≧ A + 2 (deg) continues for 1 minute (predetermined state), the operating time up to that time is set as T. The predetermined state is a state in which the drying of the clothes is substantially completed (the drying rate is about 90%), and the predetermined state can be arbitrarily set, for example, a state in which the drying rate is about 95%.

Further, the drying operation is continued, and the above B is always replaced with the latest one of the temperature difference during the subsequent drying operation. Generally, at the end of the heating and drying of the clothes, that is, at the end of the constant drying period, the value of B rapidly increases.
It is determined whether or not the value of B has reached a certain value corresponding to the end of drying, and if reached, it is determined that heating and drying have been completed, and heating and drying are ended.

When the heating and drying are completed, the semiconductor heater 25
Is stopped, and only the motor 28 is operated to perform an air blowing operation (cool down) for cooling the rotary drum 8.

X is the detected temperature (drum outlet temperature K1) of the first temperature detecting element 31 after a predetermined time after the start of the blowing operation, that is, after a lapse of 2 minutes.

The flow of FIG. 3 is determined by the combination of the time (T) until the degree of drying reaches a predetermined state and the detected temperature (X) of the first temperature detecting element 31 after a certain time from the start of the air blowing operation. The blowing operation time is determined according to the combination table disclosed in the chart. In this combination table, T is 0
Ｘ40 minutes, 40 minutes to 80 minutes, 80 minutes or more.
The airflow is divided into stages and the corresponding air blowing time is determined by each combination. For example, if T is 40 to 80 minutes and X is 4
When the temperature is 0 ° C to 60 ° C, tx is 7 minutes. And tx
After the determination, the operation is performed for the time tx, and the blowing operation is completed.

Here, the air blowing operation time is tx + 2 minutes. Thus, the air blowing operation time is the time (T) until the degree of drying reaches a predetermined state, and the first temperature detection element after a certain time after the start of the air blowing operation. The temperature changes depending on the combination of the detected temperatures (X) of 31, and thus the air blowing operation is performed for an appropriate time according to the amount of clothing. When the amount of clothing is small, the air blowing operation ends when the clothing is cooled and is wasteful. Power consumption is not performed, and when the amount of clothing is large, it is sufficiently cooled, and the user does not take out hot clothing.

[0025]

The present invention is configured as described above, and counts the time until the degree of drying reaches a predetermined state .
Since the blowing operation time is changed according to the count time , regardless of the amount of clothing, there is no wasteful power consumption, and the blowing operation is not terminated while leaving the cooling of the clothing. It is effective in that a clothes dryer that is easy to use can be obtained.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an embodiment of a clothes dryer according to the present invention.

FIG. 2 is a schematic circuit block diagram of the control circuit.

FIG. 3 is a schematic flowchart for explaining the operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clothes dryer 8 Rotary drum 31 1st temperature detection element (heat sensing means)

Claims (1)

(57) [Claims] A rotating drum into which clothes are put;
A blowing means for feeding dry air into the transfer drum;
Heating means for heating the drying air sent into the ram.
For example, performs a heat drying for drying the clothes by feeding drying air heated to the rotation within the drum, after the heat-drying is complete, the only blowing operation by stopping the heating means lines
Line cooldown to cool the clothes of the rotating the drum have
In the clothes dryer , the clothes in the rotating drum are dried.
Detecting means for detecting the degree of dryness
Count the time to reach a steady state and count this
Determine the ventilation operation time according to the time, and cool down
Sometimes, the blowing means is driven for the determined blowing operation time.
Clothes dryer, characterized in that it comprises a control unit that.