JPH07289794A - Clothes dryer - Google Patents

Abstract

PURPOSE:To enable efficient removal of dust, etc., from clothes at the time when completion of drying process is discriminated, by means of stopping electricity to a dryer's heating section, and of controlling turning drum's driving section to switch cyclically high output and low output alternate with each other. CONSTITUTION:Normally, when a microcomputer 50 directs ordinary drying operation, it electrifies a motor 21 and a heating section 19, in which case, number of rotation of the motor 21 is selected at a normal speed, and a drying process is completed when difference between temperature at the heater's exit and entrance, detected by the temperature sensors, viz. the first one 30H and the second one 30L, each reaches the value previously set. The micro-computer drives only the motor 21, rotates a fan for normal cooling down function. Subsequently, it performs ATPIT control for enhancing collectability of dust, etc. And, this ATPIT control gives time factor for the motor 21 to set both low output and high output, and the ATPIT control cycle based upon the drying time and ROM memorized tables.

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 contained in a rotary drum.

[0002]

2. Description of the Related Art Conventionally, there has been used a clothes dryer for supplying heated air to a rotating drum containing clothes and rotating the rotating drum to dry clothes. Such a clothes dryer is generally provided with a fan, and the air inside the clothes dryer is circulated by the rotation of the fan through a circulation duct connected to a rotating drum. A heating heater is attached near the inlet of the rotating drum. The heating heater heats the air sent into the circulation duct to generate heated air, and the generated heating air is supplied to the rotating drum. It In the rotating drum, heat is exchanged between the supplied heated air and the clothes, whereby the moisture impregnated in the clothes is evaporated. The moisture-containing air is exhausted from the rotary drum to the circulation duct, and the moisture contained therein is condensed by a predetermined cooling means. The dehumidified air is sent to the outlet side of the circulation duct by the rotation of the fan again. Condensed water is drained out of the dryer through a predetermined drainage port.

By the way, clothes and sheets to be dried,
Blankets and carpets often contain dust such as dust, pollen, and mites. It is well known that these dusts can also be substances that cause various allergic diseases such as asthma and atopic dermatitis, that is, allergens. Therefore, in consideration of health, it is desirable to remove such dusts.

As a method of removing mites from the above dusts, for example, after the mites are first killed, the dead bodies are guided to the outlet of the rotary drum by the heated air to be supplied to the rotary drum, and attached to the outlet of the rotary drum. In many cases, the method of adsorbing the carcass with the electrostatic filter is adopted. As a method of killing mites, a method of making the temperature of the heated air particularly high during drying is often used by utilizing the fact that mites are heat-sensitive organisms. The mortality of mites in a clothes dryer is significantly higher than that of other mite killing methods such as sun drying, which is very effective.

[0005]

However, although the above-mentioned clothes dryer can kill mites, it has a problem that it is not enough to remove the dead bodies of mites. Moreover, it was insufficient to remove not only mite carcasses but mite feces and other dusts. Then, the objective of this invention is solving the said technical subject and providing the clothes dryer which can remove the dusts contained in clothes etc. more efficiently.

[0006]

According to a first aspect of the present invention, there is provided a clothes dryer, comprising: a rotating drum for accommodating clothes; and a heating means for generating heated air.
The heated air generated by the heating means is supplied into the rotary drum and blown out from the rotary drum, the drive means for rotating the rotary drum and driving the blower, and the rotary drum. The dust trapping means for catching dusts, which is attached near the outlet of the heated air, and the rotating drum is rotated by the driving means, and the heated air heated by the heating means by the blower is rotated on the rotating drum. To determine whether or not the drying process to be supplied to the heating means has been completed, and when this determining means determines that the drying process has been completed, energizing the heating means is stopped and the output of the driving means is output. It is characterized by including control means for periodically switching between relatively high output and low output over a predetermined period.

According to a second aspect of the present invention, in the clothes dryer, the rotary drum is provided with an air intake port and an air exhaust port, one end of which is connected to the air exhaust port of the rotary drum and the other end of which is connected to the air exhaust port. Circulating air passage means further connected to an air intake of the rotating drum, wherein the air blowing means dehumidifies the heated air exhausted from the rotating drum to circulate in the circulating air passage means. Is characterized by.

According to a third aspect of the present invention, in the clothes dryer, the temperature detecting means for detecting the temperature of the heated air exhausted from the rotating drum and the determining means determine that the drying process is completed, and When the detected temperature of the temperature detecting means becomes equal to or lower than a predetermined threshold temperature, a drive stopping means for stopping the driving means is further included, and the control means switches the output of the driving means. Before the end, if the temperature detected by the temperature detecting means becomes equal to or lower than a predetermined threshold temperature, the drive stopping means is prohibited from stopping the driving means.

Further, the clothes dryer according to claim 4 further includes a measuring means capable of measuring a time from the start of the drying process to the end thereof, and the control means measures by the measuring means. The predetermined period for switching the output of the driving means is changed according to the time from the start to the end of the drying process.

The determining means determines whether or not the drying process is completed based on whether or not the temperature of the heated air detected by the temperature detecting means is equal to or higher than a predetermined reference temperature. May be

[0011]

In the structure according to the above-mentioned claim 1, when the determining means determines that the drying process is completed, the energization to the heating means is stopped, the rotary drum is rotated, and the blowing means is driven. The output of the means is periodically switched between relatively high power and low power over a predetermined period. That is, the cool down is performed for a predetermined period.

When the driving means has a low output, a so-called loosening / tapping effect is added to the clothes accommodated in the rotary drum. Therefore, dust such as mite feces and carcasses, pollen, and dust that are likely to be contained in the clothes can be taken out from the clothes. The extracted dusts are
Since the amount of air supplied to the rotary drum is not so large, the air will float in the rotary drum.

On the other hand, when the driving means has a high output, the air supplied to the rotary drum has a large air volume. for that reason,
Most of the dusts taken out of the clothes and floating in the rotating drum at the time of the low output are guided to the large amount of air and discharged to the outside of the rotating drum through the dust capturing means. At this time, the dusts are captured by the dust capturing means.

As described above, according to the above construction, the output of the driving means is periodically switched between the high output and the low output, so that the dusts can be efficiently taken out from the clothes. Further, according to the second aspect of the present invention, the blower means dehumidifies the heated air exhausted from the rotary drum to circulate the air in the circulation air passage means. Even if the species cannot be captured, the air containing the dust that cannot be captured circulates in the dryer. Therefore, dust is not discharged outside the dryer. Since the air containing the circulated dusts is exhausted to the outside of the rotary drum again via the dust trapping means, the dusts hardly adhere to the clothes.

Further, according to the third aspect of the present invention, the drive means is not stopped based on the temperature of the heated air exhausted from the rotary drum until the switching of the output of the drive means is completed. The output switching is surely performed over a predetermined period. Therefore, the dusts can be more efficiently taken out from the clothes. Further, in the configuration according to the fourth aspect, the predetermined period in which the output of the driving unit should be switched is changed according to the time from the start to the end of the drying process. The time from the start to the end of the drying process depends on the amount of clothes stored in the rotating drum. Therefore, the output of the driving means can be switched only during the period according to the amount of clothes. for that reason,
It is possible to more efficiently take out dusts from clothes and save power consumption.

[0016]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a sectional view showing a schematic configuration of a clothes dryer according to an embodiment of the present invention. Dryer body 1
A drying chamber 2 is formed inside, and a rotating drum 3 for accommodating clothes is installed in the drying chamber 2. A door 4 is attached to the center of the front surface of the dryer main body 1 so as to be openable and closable, and clothes are thrown into the rotary drum 3 through the door 4.

The rotating drum 3 is rotatably supported by the dryer main body 1 via a felt or the like by a drum supporting plate 5 made of an annular metal plate, the front side of which is attached so as to surround the door 4, and the rear side thereof. It is rotatably supported on the dryer main body 1 by a shaft 6. Further, baffles 3a for lifting clothes in the rotary drum 3 are integrally formed on the inner wall thereof at predetermined intervals. Further, an air intake 7 for taking in heated air, which will be described later, is formed in the lower portion of the front surface. Furthermore, an air exhaust port 8 is formed near the center of the rear surface thereof, and this air exhaust port 8 is covered with a lint filter 9 and a dust filter 10 which is a dust trapping means. In addition, 11 is an air exhaust port 8
It is a sealing member that seals between the drying chamber 2 and a fan chamber described later so that the air exhausted from the inside does not enter the drying chamber 2.

The dust filter 10 is for mainly capturing dusts such as carcasses of mites and feces of mites due to an electrostatic effect. For example, the electric stone non-woven fabric filter "Tremicron ES040" manufactured by Toray is applicable. . Rotating drum 3
The heat exchange type double-sided fan 1 fixed to the shaft 6 is located behind
A fan chamber 13 accommodating 2 is partitioned by a fan casing 14. The double-sided fan 12, which will be described in detail later, serves to circulate the air inside the dryer main body 1 and to function as a blowing unit for removing moisture from the circulated air. The partition plate 1 made of synthetic resin is provided in the fan casing 14 so as to surround the double-sided fan 12.
5 are provided. The double-sided fan 12 is housed in the circular opening in the center of the partition plate 15, whereby the internal space of the fan chamber 13 is divided into the drying air passage 13a and the cooling air passage 13b.

At the periphery of the double-sided fan 12, a dry air passage 13 is provided.
The concentric circular groove group 16 that opens toward a and the cooling air passage 13b is integrally formed. The rotary groove group 16 is loosely fitted to the fixed groove group 17 formed integrally with the partition plate 15 in a non-contact state. That is, the rotary groove group 16 and the fixed groove group 17 form a labyrinth connection. Therefore, air cannot come and go between the dry air passage 13a and the cooling air passage 13b.

Below the dryer main body 1, a circulation duct 18 is provided.
Is provided. This circulation duct 18 is used for the dry air duct 1.
3a is connected to the air intake 7, and a heater 19 that functions as a heating unit is disposed near the air intake 7. In addition, at the lowest part of this circulation duct 18,
A drain port 20 for draining condensed water, which will be described later, to the outside of the dryer main body 1 is formed. In this embodiment, the circulation duct 18 and the drying air passage 13a constitute a circulation air passage means.

At the bottom of the dryer main body 1, a motor 21 functioning as a driving means is provided. The motor 21 is
The belt 22 wound around the outer peripheral surface of the rotary drum 3 is applied with a rotational force via a pulley 23, while the pulley 24 and a belt 25 are applied to the shaft 6 to which the double-sided fan 12 is fixed. As a result, the rotary drum 3 and the double-sided fan 12 are rotated. A rotation sensor 26 for detecting the rotation speed of the motor 21 is attached to the pulley 24. The idler pulley 27 applies tension to the belt 22 when the rotary drum 3 rotates,
The purpose is to prevent the belt 22 from slipping.

When the double-sided fan 12 rotates, air is sent from the drying air passage 13a to the circulation duct 18. The air sent to the circulation duct 18 is heated by the heater 19 to become heated air, which is introduced into the rotary drum 3 from the air intake 7. In the rotating drum 3, heat exchange is performed between the heated air taken in and the clothes. As a result, the moisture contained in the clothes is evaporated. The air containing moisture is sent to the drying air passage 13a again by the rotation of the double-sided fan 12. That is, the rotation of the double-sided fan 12 causes the air to circulate through the drying air passage 13a, the circulation duct 18, and the rotating drum 3.

When the double-sided fan 12 rotates, the outside air is taken into the cooling air passage 12b through the outside air inlet 28 formed at the center of the rear surface of the dryer body 1. At this time, the double-sided fan 12 is cooled by this outside air. The outside air taken in is exhausted from an outside air exhaust port 29 formed below the dryer main body 1. The air in the drying air passage 13a is a double-sided fan 1
When it contacts 2, it is cooled. That is, since the double-sided fan 12 is cooled by the outside air, the air in the drying air passage 13a is cooled by coming into contact with the double-sided fan 12. Therefore, the moisture in the air exhausted from the rotary drum 3 is condensed. Dehumidified air is a double-sided fan 12
Is sent to the circulation duct 18 again. The condensed water flows down through the dry air passage 13a and is drained from the drain port 20.

In the vicinity of the air exhaust port 8 of the rotary drum 3,
A first temperature sensor 30H that functions as a temperature detecting unit that detects the temperature of exhaust gas from the rotating drum 3 is arranged.
Further, a second temperature sensor 30L is arranged in the circulation duct 18 on the upstream side of the heater 19 in the air flow direction. The second temperature sensor 30L is for detecting the temperature of the air that has passed through the circulation duct 18 from the drying air passage 13a and before being reheated by the heater 19. The first temperature sensor 30H and the second temperature sensor 30L are composed of a heat sensitive element such as a thermistor.
These first temperature sensor 30H and second temperature sensor 3
The dry state of the clothes in the rotary drum 3 is determined based on each output of 0L.

FIG. 2 is a diagram showing a schematic configuration of an operation panel provided in the clothes dryer. This operation panel is provided under the door 4 on the front of the clothes dryer, and has a power switch (SW) for turning on the power.
40, a start / pause switch (SW) 41 for starting or temporarily stopping the drying operation, an atpit button 42 for instructing atpit control described later, and a drying course such as "standard" or "slightly dry" A course selection switch 43 for selecting is provided. Further, the operation panel is provided with a heater changeover switch 44 for selecting the degree of heating of the air in the heater 19, an LED display 45 for notifying the user of the progress of drying, and the lint filter 9 and dust filter 10 eyes. A sign indicator 46 is provided to inform the user of the jam.

FIG. 3 is a block diagram showing the electrical construction of the clothes dryer. The clothes dryer is provided with a microcomputer 50 for controlling the operation of each part of the clothes dryer. This microcomputer 5
Reference numeral 0 includes a CPU, a ROM, a RAM, and a timer, which are not shown, and performs a predetermined control according to a program stored in the ROM. In this embodiment, the microcomputer 50 functions as a discriminating means, a control means, a drive stopping means, and the like.

The microcomputer 50 has a rotation speed detection circuit 51 to which the rotation sensor 26 is connected, an input key circuit 52 to which the power switch 40 and the atpit button 42 are connected, and a door switch for detecting the opening / closing of the door 4. 5
3, an LED lighting circuit 54 to which the LED indicator 45 and the sign indicator 46 are connected, a reset circuit 55 to which the start / pause switch 41 is connected, and a clock oscillation circuit 56 for generating a clock are connected.

Further, the microcomputer 50 is connected with a power supply circuit 57 connected to a commercial power supply, a power supply voltage determination circuit 58 for determining the voltage of the power supply circuit 57, and a buzzer for notifying the completion of the drying operation and the like. Buzzer circuit 59,
And a commercial power source zero-cross signal detection circuit 60 for detecting the zero-cross of the commercial power source is connected. Further, the microcomputer 50 includes a first temperature sensor 30H and
A heater 1 including a second temperature sensor 30L, a motor 21, a first heater 19a, and a second heater 19b.
9, and auto power off (A to automatically cut off the power supply to the clothes dryer after the drying operation is completed.
A load driving circuit 62 for driving the PO) 61 is connected.

Only one of the first heater 19a and the second heater 19b is energized when "weak" is selected by the heater changeover switch 44.
When "strong" is selected, both are energized. Figure 4
It is a flow chart for explaining the operation of the dry operation of the clothes dryer.

When the user turns on the clothes and turns on the power switch 40 (step S1), first, the timer in the microcomputer 50 starts counting, and whether the atpit button 42 is turned on or not. It is determined (step S2). As a result, if it is determined that the atpit button 42 is not turned on and that the start / pause switch 41 is turned on (step S3), normal drying operation is performed (step S).
4).

Next, a normal drying operation will be described with reference to FIG. In a normal drying operation, first, the motor 21 and the heater 19 are energized to perform a predetermined drying process (step S5). At this time, the rotation speed of the motor 21 is selected to be a normal rotation speed (for example, 1200 (rpm)).
The drying process is performed by, for example, the first temperature sensor 30H and the second temperature sensor 30H.
Temperature difference T (= | T1-T2) between the outlet temperature T1 and the heater inlet temperature T2 detected by the temperature sensor 30L.
| Is a predetermined temperature difference T _th1 (for example, T
_{When th1} = 10 deg) is reached, or when a separately designated time has elapsed from when the above-mentioned drying process was started, the process is ended.

When it is judged that the drying process is completed (step S6), the heater 19 is turned off, and
The motor 21 is kept ON (step S7). As a result, the air sent to the circulation duct 18 by the rotation of the double-sided fan 12 is introduced into the rotary drum 3 without being heated by the heater 19, and the normal cooldown process is performed (step S8). The cool-down process is performed for the purpose of cooling the clothes that have become hot due to the above drying process so that the user can take them out easily. The normal cooldown process is performed by the outlet temperature T1 detected by the first temperature sensor 30H.
Is below a predetermined temperature T _{th 2} (for example, T _th2 = 40 ° C.) or when a predetermined cooldown processing time has elapsed.

When the cool down process is completed, the normal drying operation in the clothes dryer when the atpit button 42 is not turned on is completed. Returning to FIG. 4, on the other hand, when it is determined that the attopit button 42 is turned on as a result of the determination in step S2, first, control for enhancing the effect of collecting dusts such as mite feces and carcasses Atpit flag A indicating whether or not to perform atpit control
It is determined whether or not F is set (step S
9). Here, since the at-pit flag AF is normally reset, the at-pit flag AF is set (step S10). Then, it is determined whether or not the start / pause switch 41 is turned on (step S
12). Normally, when the atpit button 42 is turned on, the start / temporary stop switch 41 is also turned on, so that the above-described drying process is performed as it is (step S13).

After the atpit flag AF is set in step S10, the start / pause switch 4
If 1 is not turned on, the process returns to step S2. At this time, in step S8, since it is determined that the atopit flag AF is set, the atopit flag AF is set.
Are reset again (step S11). When the drying process is completed (step S14), the heater 19 is turned off (step S15). As a result, the cooldown process by the apitit control is started. When the cool-down processing by the attopit control is started, it is first determined whether or not the attopit flag AF is set (step S16). Normally, since the at-pit flag AF is set, at-pit control is performed (step S17).

Next, the atpit control will be described with reference to FIG. In the atpit control, first, the time t ₁ from the start to the end of the drying process is fetched from the timer to the microcomputer 50 (step S18). The microcomputer 50 refers to the table stored in the ROM on the basis of the taken-in drying processing time t _{1 so} that the time t at which the output of the motor 21 should be relatively low and high. ₂ , t
₃ , and the cycle C in which the atpit control is performed when the low output and the high output are one cycle is acquired (step S19). Table 1 below shows an example of the above table.

[0036]

[Table 1]

When the low output time t ₂ , the high output time t ₃ and the cycle C are acquired, the load drive circuit 61 (see FIG. 6) is set so that the output of the motor 21 becomes relatively low output (for example, 1000 (rpm)). 3) is controlled (step S20).
As a result, the double-sided fan 12 and the rotary drum 3 are rotated at a low rotational speed, so that a relatively small amount of air is supplied to the rotary drum 3.

The rotary drum 3 is rotated at a low speed.
Then, the clothes in the rotating drum 3 are baffle 3a (see FIG. 1).
Is slowly lifted up and dropped down.
The operation of being repeated is repeated. That is, put on clothing
Adds a relaxing and loosening effect. As a result, included in clothing
Dust such as dust and mites, mite feces and carcasses, and pollen
Birds are taken out into the air. Low output state of this motor 21
The low output time t ₂Will be held until.

When the low output state ends (step S2)
1) Then, the load drive circuit 61 is controlled so that the output of the motor 21 becomes relatively high (for example, 1400 (rpm)) (step S22). As a result, the double-sided fan 12 and the rotating drum 3 are rotated at a high rotation speed,
A relatively large amount of air is supplied to the rotary drum 3. The dusts extracted from the clothes when the output is low are floating in the air. In this state, a large amount of air is generated in the rotating drum 3.
Most of the suspended dusts are supplied to the outlet of the rotary drum 3 by the large amount of air. As a result, the dust is removed from the lint filter 9
And captured by the dust filter 10. Therefore, the air exhausted from the rotary drum 3 contains almost no dusts. This high output state is maintained until the high output time t ₃ has elapsed (step S23).

Returning to FIG. 4, when the high output state ends, it is determined whether the low output and the high output have been repeated for the period C acquired in step S19 (step S24). As a result, when the cycle C has not been repeated, counting of the cooldown processing time t ₄ is started (step S27). The cool-down processing time t ₄ is set to be sufficiently longer than the time corresponding to the longest cycle C in the cycle C in which the above-described atpit control should be performed. For example, the longest cycle C
If the time corresponding to is 10 minutes, the cool down processing time t ₄ is 15 minutes.

Then, it is determined whether or not this cooldown processing time t ₄ has passed a predetermined time t ₀ (for example, t ₀ = 15 minutes) (step S28). As a result, if it is determined that the predetermined time t ₀ has not elapsed, the process returns to step S16. At step S16, since it is determined that the attopit flag AF is set, the atpit control is performed again.

When it is determined in step S24 that the atpit control has been performed for the period C by repeating the above processing, the atpit flag AF is reset (step S25). After that, cool down processing time t
After it is determined whether ₄ has passed the predetermined time t ₀ ,
It returns to step S16. In step S16, since it is determined that the attopit flag AF has been reset,
Subsequently, it is determined whether or not the outlet temperature T1 of the rotary drum 3 detected by the first temperature sensor 30H is equal to or lower than the predetermined temperature T _th2 (step S26). That is, it is determined whether or not the outlet temperature T1 is equal to or lower than the predetermined temperature T _th2 only after the atpit control is completed.

The motor 21 is turned off when the outlet temperature T1 becomes equal to or lower than the predetermined temperature T _th2 or when the cooldown processing time t ₄ elapses for the predetermined time t _0.
Then, (step S29), the cooldown process by the attopit control ends. When this cool down process is completed, the drying operation of the clothes dryer when the atpit button 42 is turned on is completed.

As described above, according to the clothes dryer of this embodiment, the output of the motor 21 is periodically switched between relatively low output and high output in the cooldown process after the completion of the drying process. When the output is low, the clothes are loosened and tapped to remove the dust in the clothes, and when the output is high, the extracted dust is guided to a large amount of air and captured by the dust filter 10. . Therefore, it is possible to efficiently remove dusts from the clothing while cooling the clothing. Therefore, it is possible to realize a cleaner and sanitary dry finish as compared with the conventional case.

Further, even if the temperature of the clothes in the rotating drum 3 becomes equal to or lower than the predetermined temperature T _th2 , the atpit control is surely performed, so that the dusts can be surely removed from the clothes. Furthermore, since the time at which the atopit control should be performed is changed depending on the drying processing time t ₁ , the atopit control can be performed only for the time corresponding to the amount of clothes.
Therefore, the dusts can be more efficiently taken out from the clothes.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in the above-described embodiment, after the moisture in the air that has been contained in the clothes and has a high humidity is condensed, the dehumidified air is reheated by the heater 19 and returned to the rotary drum 3. Although the dehumidifying type clothes dryer described above has been described, the present invention can be applied to a dryer other than this type.

Although clothes have been described as an example of the article to be dried in the above embodiment, the present invention is also applicable to articles other than clothing such as blankets, sheets, and other articles to be dried. Other various design changes can be made within the scope described in the claims.

[0048]

As described above, according to the clothes dryer of the present invention, the output of the driving means is periodically switched between the relatively low output and the high output for a predetermined period after the completion of the drying process. It can efficiently remove items from clothing. Therefore, it is possible to realize a cleaner and hygienic dry finished state as compared with the conventional case. In particular, the effect of drying a blanket or sheets containing a large amount of dust is very large.

Particularly, according to the clothes dryer of the second aspect, since the heated air exhausted from the rotary drum is dehumidified and circulated in the circulation air passage means, even if all the dust is captured by the dust trapping means. Even if the species cannot be captured, the air containing the dust that cannot be captured circulates in the dryer. Therefore, dust is not discharged outside the dryer. Therefore, the environment outside the dryer is not deteriorated.

Further, according to the clothes dryer of the third aspect, the output of the drive means is reliably switched over a predetermined period, so that the dusts can be taken out from the clothes more efficiently. Further, according to the clothes dryer of the fourth aspect, the output of the driving means can be switched only during a period according to the amount of clothes. Therefore, it is possible to more efficiently take out dusts from clothes and save power consumption.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration of a clothes dryer according to an embodiment of the present invention.

FIG. 2 is a diagram showing a schematic configuration of an operation panel provided in the clothes dryer.

FIG. 3 is a block diagram showing an electrical configuration of the clothes dryer.

FIG. 4 is a flow chart for explaining a drying operation of the clothes dryer.

FIG. 5 is a flowchart for explaining a normal drying process in the drying operation.

FIG. 6 is a flowchart for explaining atpit control during the drying operation.

[Explanation of symbols]

 1 Dryer Main Body 3 Rotating Drum 10 Dust Filter 12 Double-sided Fan 13a Drying Air Path 18 Circulating Dust 19 Heating Heater 21 Motor 42 Attopit Button 50 Microcomputer

Front page continuation (72) Inventor Kazushi Kawamura 2-5-5 Keihan Hondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor ▲ Hiro ▼ Tatsuya Ta, 2-chome, Keihan-hondori, Moriguchi-shi, Osaka 5-5 Sanyo Electric Co., Ltd. (72) Inventor Tamotsu Kawamura 2-5-5 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor Takashi Fukuda Keihan Hondori, Moriguchi City, Osaka Prefecture 2-5-5 Sanyo Electric Co., Ltd. (72) Inventor Minoru Kishi 2-5-5 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor ▲ Hiro ▼ Se Hisanori Osaka 2-5-5 Keihan Hondori, Moriguchi City Sanyo Electric Co., Ltd.

Claims (4)

[Claims] 1. A rotary drum for accommodating clothes, a heating means for generating heated air, and the heated air generated by the heating means is supplied into the rotary drum and flows out from the rotary drum. An air blowing means for rotating the rotary drum and a driving means for driving the air blowing means; and a heating means installed on the rotary drum near an outlet of the heated air.
Whether or not the dust trapping means for trapping dust and the drying process for rotating the rotary drum by the driving means and supplying the heated air heated by the heating means by the blowing means to the rotary drum have been completed. When it is determined that the drying process is completed, the energization to the heating means is stopped and the output of the drive means is relatively high and low over a predetermined period. And a control means for periodically switching between and. 2. The rotary drum is provided with an air intake port and an air exhaust port, one end of which is connected to the air exhaust port of the rotary drum and the other end of which is connected to the air intake port of the rotary drum. 2. The garment according to claim 1, further comprising: a circulating air passage means, wherein the air blowing means dehumidifies the heated air exhausted from the rotary drum to circulate in the circulating air passage means. Dryer. 3. A temperature detecting means for detecting the temperature of the heated air exhausted from the rotary drum, and a temperature detected by the temperature detecting means is predetermined after it is judged by the judging means that the drying process is completed. When the temperature becomes equal to or lower than the threshold temperature, the drive means is further included to stop the drive means, and the control means controls the temperature detection means before the output of the drive means is switched. The clothes dryer according to claim 1 or 2, wherein when the detected temperature becomes equal to or lower than a predetermined threshold temperature, the stopping of the driving means by the driving stopping means is prohibited. 4. A measuring unit capable of measuring the time from the start to the end of the drying process, wherein the control unit is provided after the drying process measured by the measuring unit is started. Depending on the time to finish
4. The clothes dryer according to claim 1, wherein a predetermined period for switching the output of the driving means is changed.