JP2657130B2 - 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, JP-A-60-174195, heating and drying are performed when the measured temperature difference between a plurality of heat-sensitive means exceeds a predetermined value. Control for terminating is known. However, in this conventional example, it is very difficult to obtain a high degree of drying (to completely dry) because the accuracy of the heat-sensitive means varies widely. Therefore, it was considered to extend the heating and drying time for a certain period of time,
In this case, there is a drawback that heating and drying are completed in a state where a small amount of clothing or a dry cloth is too dry, and a large amount of clothing or a thick cloth is not sufficiently dried.

[0003]

SUMMARY OF THE INVENTION According to the present invention, heating and drying are performed for an appropriate operation time according to the amount and type of clothing.
Therefore, it is an object of the present invention to provide an easy-to-use clothes dryer that can completely dry clothes with a high degree of drying regardless of the amount and type of clothes and that can dry without wasteful power consumption. .

[0004]

To achieve the above object of the Invention The present invention is, clothes are dried by feeding drying air heated by the heater into the rotary drum, drying air exiting from the rotating drum
Dehumidified and then heated again and sent into the rotating drum
A performs a heating and drying by rotary drum Atsushi Ideguchi
The first thermal means for detecting the temperature and the temperature near the heater inlet
The second heat sensing means, the first heat sensing means and the second heat sensing means
It reaches the drying degree to be measured by the temperature difference between the dry air detected by the means at a predetermined value Then, before a predetermined extension time
After extending the heating and drying, the drying to end the heating and drying
A clothes dryer provided with a control means.
The means includes a temperature difference after a predetermined time from the start of the heating means, and an operation time until the degree of drying reaches the predetermined value.
The extension time is determined by the following .

[0005]

According to the above construction, the temperature difference that changes according to the amount and the type of the clothes and that is a certain time after the start of the heating and drying ,
Drying degree to be measured by the temperature difference is extended only heat drying operation time and the thus extended time determined to reach a predetermined value, proper only operating time heat drying line in accordance with the amount and type of clothing Will be

[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. The semiconductor heater 25 includes a first heater 25a and a second heater 25.
b.

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.

FIG. 2 is a diagram of a control operation unit 34 disposed below the slot 3 in the front of the machine frame 2 of the clothes dryer 1. The control operation unit 34 includes a switch operation unit 35 and a display unit 36 for displaying an operation status. .
The switch operation unit 35 includes a power switch 37, a start switch 38 for inputting start and stop of operation, and a "standard" for terminating a drying operation course at a standard degree of drying.
Course, “Iron” course, finished in a dry state, “Elaborate”, finished with a further drying than the standard degree of drying
Course changeover switch 39 for changing over to courses such as courses
And the first and second heaters 25a and 25
b. A heater changeover switch 40 for switching between "strong" to use simultaneously and "weak" to use only the first heater 25a, and elevating the temperature in the rotating drum 8 to eliminate bacteria and mites adhering to clothes. A "kinkoro" course setting switch 41 for setting the "kinkoro" course to be performed is provided. The display section 36 includes first, second, and third display elements L1, L2, and L3 indicating the progress of the drying operation, a "strong" display element L4, and a "weak" display element L5 that light up in response to the strength of the heater. "60 minutes" display element L6, "Iron" display element L7, "Elaborate" display element L8, "Slightly dry" display element L9, "Standard" display element L10, and filter-clogging, indicating the course of the drying operation. It has a notification display element L11 and a display unit 42.

FIG. 3 is a schematic circuit block diagram of the control circuit. Referring to FIG. 3, reference numeral 43 denotes a micro computer (microcomputer) serving as drying control means, and 44 denotes the start switch. An input key circuit in which 38 and the like are arranged, 45 is a door switch, 36 is the display unit, 31, 32, and 33 are the first, second, and third temperature detecting elements described above. Reference numeral 46 denotes a power supply frequency synchronization signal detection circuit which detects a zero-cross of an AC voltage of a commercial frequency and sends it to the microcomputer 43. 47 is a power supply circuit. Reference numeral 48 denotes a clock oscillation circuit which advances a program as an operating clock of the microcomputer 43 and is used for time counting. A reset circuit 49 resets a program in the microcomputer 43 to an initial state when the power switch 37 is pressed. Reference numeral 50 denotes a load drive circuit, which is controlled by a motor 43 and a semiconductor heater 25 (first
The on / off control of the heater 25a and the second heater 25b) is performed. Reference numeral 51 denotes a buzzer circuit for notifying the end of the drying operation and the like.

When the start switch 38 is operated, the microcomputer 43 causes the motor 28 and the semiconductor heater 2 to operate.
5 (the first heater 25a and the second heater 25b) are operated, 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, FIGS. 4 and 5 show flowcharts for schematically explaining the operation of the program stored in the microcomputer 43, and FIG. 6 shows a matrix table for obtaining an extended time tx in the flowchart. The operation will be described.

The microcomputer 43 starts counting time from the start of the drying operation. If the user sets the heater "strong", the microcomputer 43 turns on the first and second heaters 25a and 25b and sets the heater "weak". Then, the first heater 25a is turned on, the motor 28 is turned on, and the heating and drying operation is started. The operating time counted from the start of the operation is set as T, and the temperatures of the detected temperature of the first temperature detecting element 31 (drum outlet temperature K1) and the second temperature detecting element 32 (heater inlet temperature K2) during the operating time T are set. Put the difference as S.

After a predetermined time from the start of the operation, that is, when the T is 15 minutes, the value of S is set as A, and when the T is 60 minutes, the value obtained by subtracting A from B is set as B.

According to the combination of the values of A, B, and T, when the heater is "strong", the matrix table shown in FIG. 6A is used. When the heater is "weak", FIG. The extension time tx is determined according to the matrix table.

Referring to FIG. 6, the value of A is 10
The value of B is set to 0 to 2 deg, 2 to 4 deg, 4 deg in three stages of 10 deg or less, 10 to 20 deg and 20 deg or more.
In the above three steps, the value of T is set to 0 to 60 minutes, 60 to 90 minutes,
Each of these three parameters is divided into three stages of 90 minutes or more.
Tx is determined by a matrix of data. Where T
<15 minutes, the value of A is not determined, so A = 20 deg
Since the value of B is not determined at T <60 minutes,
B = 4 degrees or more.

Returning to the description of the flowchart again. After the determination of tx, if the “Iron” course is selected, the “Iron” display element L7 is turned on and off, and if iron detection is performed by another control, the process proceeds to the end step.

In the case of the "standard" course, the "standard" display element L10 is turned on and off, and the process of taking in each information and determining tx is repeated until the detection of the pre-standard of another control is performed. Here, the pre-standard detection means that the degree of drying of the clothes is a predetermined value corresponding to a predetermined degree of drying based on information obtained by each of the temperature detecting elements 31, 32, 33, that is, a predetermined value corresponding to a standard degree of drying, or It is to detect that a predetermined value corresponding to a state where the drying degree is further than the standard drying degree is reached. After reaching this state, in the "standard" course, the heating and drying is extended. When the pre-standard detection is performed, tx obtained up to that time is counted, and the heating and drying is extended only during that time. After extending the heating and drying by the operation time tx, the process proceeds to the end step.

In the case of the "Elaborate" course, the "Elaborate" display element L8 is turned on and off, and the extended control of the heating and drying is performed in the same manner as in the "Standard" course. After that, it proceeds to the end step.

In the end step, the semiconductor heater 25 (first heater 25a, second heater 25b) is stopped and the motor 28
Only the air blow operation for cooling the rotating drum 8 (cooling)
Down).

After a predetermined time, the motor 28 is stopped to end the end step, a buzzer for notifying the end is sounded by the buzzer circuit 51, the display is returned to before the start of the operation, and the drying operation is ended.

As described above, the temperature difference, which varies according to the amount and type of the clothes, after a certain period of time from the start of heating and drying,
By extending the heating and drying for an extended time set in combination with the operation time until the degree of drying measured by the temperature difference between the plurality of heat-sensitive means reaches a predetermined value, the appropriate amount according to the amount and type of clothing Heat drying is performed only for the operation time, so that regardless of the amount or type of clothing,
Clothing can be completely dried with a high degree of drying, and can be dried without wasteful power consumption.

[0029]

According to the present invention constitutes as described above, vary depending on the amount and type of clothing, and the temperature difference after a predetermined time from the start of heat drying, drying as measured by temperature difference operating time and the thus determined to a degree reaches a predetermined value
By extending the heating and drying for a specified extension time,
Heat drying is performed for an appropriate operation time according to the amount and type of clothing, so that regardless of the amount and type of clothing, the clothing can be completely dried with a high degree of drying, and without wasteful power consumption. There are effects such as being able to obtain a clothes dryer which can be dried and which is easy to use.

[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 front view of the control operation unit.

FIG. 3 is a schematic circuit block diagram of the control circuit.

FIG. 4 is a schematic flowchart for explaining the operation.

FIG. 5 is a flowchart schematically illustrating the operation continued from FIG. 4;

FIG. 6 is a matrix chart for obtaining the same extended time tx, wherein (a) is a matrix chart when the heater is “strong”;
(B) is a matrix table when the heater is "weak".

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clothes dryer 8 Rotary drum 31 1st temperature detection element (heat sensing means) 32 2nd temperature detection element (heat sensing means)

Claims (1)

(57) [Claims] [Claim 1] clothes are dried by feeding the drying air heated by the heater in times rolling in the drum, the drying air exiting from the rotating drum
Dehumidified and then heated again and sent into the rotating drum
A performs a heating and drying by rotary drum Atsushi Ideguchi
The first thermal means for detecting the temperature and the temperature near the heater inlet
The second heat sensing means, the first heat sensing means and the second heat sensing means
It reaches the drying degree to be measured by the temperature difference between the dry air detected by the means at a predetermined value Then, before a predetermined extension time
After extending the heating and drying, the drying to end the heating and drying
A clothes dryer provided with a control means.
The means includes a temperature difference after a predetermined time from the start of the heating means, and an operation time until the degree of drying reaches the predetermined value.
Clothes dryer, characterized by determining the extension time by the.