JPH11319396A - Clothes dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to sufficiently reduce the temperature in a rotary drum without requiring too long cooling air blowing time and complete the cooling air blowing operation with in the cooling air blowing time decided by ambient temperature, in a clothes dryer to dry clothes in a rotary drum with warm air. SOLUTION: Warm air heated with a PTC heater 4 installed on the air blowing route is blown by a heat exchanger type two-blade fan into a rotary drum to dry clothes, the rotary drum and the heat exchanger type two-blade fan are driven to rotate by a motor 6, and a memory means 9 memorizes the beforehand decided relationship between the ambient temperature and the cooling air blowing time. The control means 8 controls the motor 6 and the PTC heater 4 to control drying operation, and estimates the ambient temperature from the detected temperature by a temperature detecting means 7 at the start of the drying operation and decides the cooling air blowing time by the data memorized in the memory means 9 in the cooling air blowing operation in the termination of the 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 applying warm air to the clothes in a rotating drum.

[0002]

2. Description of the Related Art In recent years, there has been proposed a clothes dryer for household use which not only automatically detects the degree of drying but stops the operation but also prevents burns due to a rise in the temperature of clothes and equipment. . Heretofore, this type of clothes dryer has been configured as shown in JP-A-5-208097. That is, the air conditioner includes control means for controlling the drying operation and the cooling air blowing operation, and exhaust gas temperature detecting means for detecting the exhaust air temperature of the rotating drum. When I took out my clothes, I had to blow air until it was well below a safe temperature where there was no danger of burns.

[0003]

In such a conventional clothes dryer, a cooling and blowing operation is performed until the exhaust temperature of the rotating drum is sufficiently lower than a safe temperature. If the cooling air blowing time is longer, the cooling air blowing time is not a fixed time, such as when the cooling air blowing time is longer, and the cooling air blowing time is shorter in a low temperature atmosphere in winter or when the amount of cloth is small. Could not accurately inform the user that the operation was nearly finished.

[0004] When a clothes dryer is used in a small room with poor ventilation, the ambient temperature becomes extremely high, and there is a problem that the temperature of the cloth is hardly lowered during a normal cooling and blowing time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to sufficiently reduce the temperature inside a rotary drum without prolonging the cooling air blowing time, and to end the cooling air blowing operation at a cooling air blowing time determined by the ambient temperature. And

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a rotating drum for drying clothes, which is heated by a heating means provided in a blowing path and blown by a blowing means. The blower is rotated by a motor. The storage unit stores a predetermined relationship between the ambient temperature and the cooling air blowing time. The control unit controls the motor and the heating unit to control the drying operation, and in the cooling air blowing operation at the end of the drying operation, estimates the ambient temperature from the temperature detected by the temperature detection unit at the start of the drying operation, and stores the ambient temperature in the storage unit. The cooling air sending time is determined based on the obtained data.

Thus, the temperature inside the rotary drum can be sufficiently reduced without prolonging the cooling air blowing time, and the cooling air blowing operation can be completed within the cooling air blowing time determined by the ambient temperature.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to a first aspect of the present invention is directed to a rotating drum for storing and drying clothes, a blowing means for circulating warm air into the rotating drum, and a blowing path to the rotating drum. Heating means, a temperature detecting means for detecting the temperature of exhaust gas discharged from the rotating drum, a motor for driving the rotating drum and the blowing means, and a relationship between a predetermined atmosphere temperature and a cooling blowing time. Storage means for storing, and control means for controlling the motor and the heating means to control the drying operation, wherein the control means includes a cooling air blowing operation at the end of the drying operation, and a temperature detecting means at the start of the drying operation. The cooling air blowing time is determined based on the ambient temperature estimated from the detected temperature and the data stored in the storage means. The inner temperature with sufficiently reduced, it is possible to terminate the cooling air blowing operation by the cooling air blowing time determined by the ambient temperature.

According to a second aspect of the present invention, in the first aspect of the present invention, the storage means stores the relationship between the ambient temperature, the time from the start of the drying operation to the cooling air blowing operation, and the cooling air blowing time, and The means, in the cooling air blowing operation at the end of the drying operation, the atmosphere temperature estimated from the temperature detected by the temperature detection means at the start of the drying operation, the time from the start of the drying operation to the start of the cooling air blowing operation, and data stored in the storage means. The cooling air blowing time is determined.The cooling air blowing time is determined by the cooling air blowing time determined by the ambient temperature and the amount of clothing, while the temperature inside the rotating drum is sufficiently reduced without excessively increasing the cooling air blowing time. Can be terminated.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the control means, when the temperature detected by the temperature detection means is equal to or higher than a predetermined temperature at the end of the cooling air blowing time. It is designed to extend the cooling air blowing time, poor ventilation, when the exhaust temperature of the rotating drum does not drop to the predetermined temperature, such as when using a clothes dryer for a long time in a small room, extend the cooling air blowing time, The temperature of the clothes can be lowered, and when taking out the clothes in the rotating drum, there is no danger of burns and safety can be improved.

[0011] The invention described in claim 4 is the above-mentioned claim 1-
3. The invention according to claim 3, further comprising display means, wherein the control means displays the predetermined time before the end of the operation by the display means a predetermined time before the end of the operation. By setting the time determined by the ambient temperature or the time determined by the ambient temperature and the amount of clothing, the end of the operation can be accurately determined, and the display indicating that the end of the operation is near can be accurately given a predetermined time before the display.

According to a fifth aspect of the present invention, in the fourth aspect of the invention, when the cooling air blowing time is shorter than a time indicating that a predetermined time before the end of the operation, the control means performs the drying operation. After extending, perform cooling air blow operation,
It is displayed before the predetermined time before the end of operation, and even in a low-temperature atmosphere or when the amount of clothing is small and the cooling air blowing time is shorter than the predetermined time, the cooling air blowing time is determined by the ambient temperature or the atmosphere. The time determined by the temperature and the amount of clothing is set, and the drying operation time is extended, so that it is possible to accurately notify that the operation end is near by a display a predetermined time before the operation end.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) As shown in FIG. 2, a rotary drum 1 is for putting clothes and drying it. The rotary drum 1 is connected to a heat exchange type double-wing fan by a heat exchange type double-wing fan (blowing means) 2. The heated hot air is passed through a PTC heater (heating means) 4 provided in a blowing path 3 between
To send to. A filter 5 for removing lint is disposed on the exhaust port side inside the rotary drum 1.

The heat exchange type double-wing fan 2 sends air to the rotating drum 1 and simultaneously cools the humid air with the outside air to dehumidify the water in the rotating drum 1. The PTC heater 4 is formed of a semiconductor heater having a positive temperature-resistance characteristic, and the amount of heat generated varies depending on the amount of air blown or the temperature. The motor 6 drives the heat exchange type double-wing fan 2 and the rotary drum 1 to rotate.
The temperature detecting means 7 detects the exhaust gas temperature in the rotary drum 1 and is disposed between the rotary drum 1 and the heat exchange type double-blade fan 2.

As shown in FIG. 1, the control means 8 includes a control circuit 8 having a microcomputer as a main control means.
0, relays 81 a and 81 b for controlling the heaters 4 a and 4 b constituting the PTC heater 4, and semiconductor switching means 82 for controlling the motor 6. The temperature detecting means 7 is made of a semiconductor such as a thermistor whose resistance changes according to the temperature, and has a built-in A microcomputer.
The temperature is detected by the / D conversion circuit.

The storage means 9 is composed of a semiconductor memory, and stores, as shown in Table 1, data on the relationship between the exhaust gas temperature T detected by the temperature detection means 7 at the start of a predetermined drying operation and the cooling air blowing time. And input to the control means 8. Here, the exhaust gas temperature T detected by the temperature detecting means 7 at the start of the drying operation is substantially the same as the ambient temperature.

[0018]

[Table 1]

An AC voltage is applied from an AC power supply 10 to the PTC heater 4 and the motor 6. The control means 8 detects the degree of drying of the clothes in the rotating drum 1 from the temperature of the temperature detecting means 7 and the temperature change, and controls the PTC heater 4 so that the exhaust temperature detected by the temperature detecting means 7 becomes equal to or lower than a set value. On / off control is performed by a relay 81 to perform temperature adjustment. At the end of the drying operation, the PTC heater 4 is turned off and only the motor 6 is driven to perform the cooling air blowing operation, that is, the air blowing operation. At this time, the control means 8 determines the cooling air blowing time from the temperature data by the temperature detecting means 7 and the data of the temperature and time in the storage means 9.

The operation of the above configuration will be described with reference to FIG. 3. The drying operation program is started from step 101, and the temperature detection means 7
The exhaust temperature T is inputted, and in step 103, the control means 8 determines the cooling air blowing time from the cooling air blowing time data corresponding to the exhaust temperature T at the start of the drying operation stored in the storage means 9 in advance.

In order to prevent a burn due to a rise in the temperature of clothes or equipment, a cooling air blowing time is set so that the exhaust gas temperature is about 45 ° C. or less. Further, the exhaust gas temperature T before the start of the drying operation substantially represents the ambient temperature, and the cooling air blowing time at which the exhaust gas temperature becomes about 45 ° C. or less is substantially proportional to the ambient temperature. In other words, at low temperatures, the cooling air blowing time becomes shorter,
Longer at high temperatures. For example, when the exhaust gas temperature T is 20 ° C., the cooling and blowing operation is performed for 10 minutes.

In step 104, a drying operation subroutine is performed. That is, the control means 8 detects the degree of drying of the clothes in the rotating drum 1 from the temperature of the temperature detection means 7 and the temperature change, and sets the PTC heater so that the exhaust temperature detected by the temperature detection means 7 becomes equal to or lower than the set value. 4 is turned on / off by a relay 81 to perform temperature adjustment. When the drying operation is completed, in step 105, the PTC heater 4 is turned off and only the motor 6 is driven to perform the cooling and blowing operation. Step 1
When the cooling and blowing operation ends at 06, the operation ends at step 107.

As described above, according to the present embodiment, in the cooling air blowing operation at the end of the drying operation, the ambient temperature is estimated from the temperature detected by the temperature detecting means 7 at the start of the drying operation, and the data stored in the storage means 9 is used. Since the cooling air blowing time is determined, the temperature inside the rotating drum 1 can be sufficiently reduced without lengthening the cooling air blowing time too much, and the cooling air blowing operation can be terminated at the cooling air blowing time determined by the ambient temperature.

(Embodiment 2) The storage means 9 shown in FIG.
As shown in (Table 2), data on the relationship between the exhaust gas temperature T detected by the temperature detection means 7 at the start of the predetermined drying operation, the time S from the start of the drying operation to the cooling air blowing operation, and the cooling air blowing time is shown. I remember. Here, the exhaust gas temperature T detected by the temperature detecting means 7 at the start of the drying operation is substantially the same as the ambient temperature. In Table 2, the unit is minute.

[0025]

[Table 2]

In the cooling air blowing operation at the end of the drying operation, the control means 8 stores the atmosphere temperature estimated from the temperature detected by the temperature detecting means 7 at the start of the drying operation, the time from the start of the drying operation to the start of the cooling air blowing operation, and a storage means. 9, the cooling air sending time is determined. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. 4. A drying operation program is started at step 201, and a timer is started at step 202. In step 203, the exhaust gas temperature T is detected by the temperature detecting means 7.
, And a drying operation subroutine is performed in step 204. That is, the control means 8 detects the degree of drying of the clothes in the rotating drum 1 from the temperature of the temperature detection means 7 and the temperature change, and sets the PTC heater so that the exhaust temperature detected by the temperature detection means 7 becomes equal to or lower than the set value. 4 is turned on / off by a relay 81 to perform temperature adjustment.

In step 205, the timer is stopped. In step 206, the control means 8 calculates a time S from the start of the drying operation to the cooling and blowing operation (end of drying). In step 207, the control means 8 determines the cooling air blowing time from the exhaust temperature T stored in the storage means 9 in advance and the cooling air blowing time data corresponding to the time S from the start of the drying operation to the cooling air blowing operation.

The exhaust gas temperature T before the start of the drying operation substantially represents the ambient temperature, and the cooling air blowing time at which the exhaust gas temperature becomes about 45 ° C. or less is substantially proportional to the ambient temperature. That is, the cooling air blowing time becomes short at a low temperature, and becomes long at a high temperature. Further, the cooling air blowing time is almost proportional to the amount of clothing, and the cooling air blowing time is short when the amount of clothing is small, and the cooling air blowing time is long when the amount is large. Therefore, the amount of clothing can be approximately estimated from the drying operation time.

That is, if the amount of clothing is small, the drying time is short, and if the amount is large, the drying time is long. For example, when the exhaust temperature T = 20 ° C. and the time S = 90 minutes from the start of the drying operation to the cooling air blowing operation (drying end), the cooling air blowing is performed for 10 minutes. As described above, by adding the amount of clothing to the ambient temperature as a parameter for determining the cooling air blowing time, the cooling air blowing time at which the exhaust temperature becomes approximately 45 ° C. or less can be finely determined.

In step 208, the PTC heater 4 is turned off, and only the motor 6 is driven to perform the cooling air blowing operation. When the cooling and blowing operation is completed in Step 209, Step 210
To end the operation.

As described above, according to the present embodiment, in the cooling air blowing operation at the end of the drying operation, the ambient temperature estimated from the temperature detected by the temperature detecting means 7 at the start of the drying operation and the temperature from the start of the drying operation to the cooling air blowing operation. Since the cooling air blowing time is controlled based on the time and the data stored in the storage means 9, the temperature inside the rotating drum is sufficiently reduced without excessively increasing the cooling air blowing time, and the cooling air blowing time determined by the ambient temperature and the amount of clothing. With this, the cooling and blowing operation can be terminated.

(Embodiment 3) At the end of the cooling air blowing time, if the temperature detected by the temperature detecting means 7 is equal to or higher than a predetermined temperature (for example, 47 ° C.), the control means 8 shown in FIG. I try to extend it. Here, the predetermined temperature (47 ° C.) is a value obtained by an experiment in advance, and is a temperature at which the temperature of the device or cloth is sufficiently low and there is no danger of burns or the like. Other configurations are the same as those in the first or second embodiment.

The operation of the above configuration will be described with reference to FIG. Step 201 to step 209
The operations up to this point are the same as those in the second embodiment, and the description is omitted.

At step 301, the exhaust gas temperature T1 is detected by the temperature detecting means 7 and inputted to the control means 8. Normally, clothes dryers have ventilation facilities or are used in large spaces, so the ambient temperature rises slightly due to the heat generated by the devices themselves.For example, if the devices are installed in a narrow space and ventilation is not performed, However, the ambient temperature rises sharply.

In such a case, since the cooling efficiency due to the cooling air blowing deteriorates, unless the cooling air blowing time is longer than usual, the exhaust temperature will not fall below the predetermined temperature (47 ° C.). Therefore, only in such an unusual case, after giving the cooling air blowing time a predetermined time while giving priority to safety, the cooling air blowing time is extended until the exhaust gas temperature becomes about 47 ° C. or less. If the exhaust temperature is equal to or lower than the predetermined temperature in step 302, the operation is terminated in step 303.

As described above, according to the present embodiment, at the end of the cooling air blowing time, if the temperature detected by the temperature detecting means 7 is equal to or higher than the predetermined temperature, the cooling air blowing time is extended, so that ventilation is poor and narrow. When a clothes dryer is used for a long time in a room, the cooling air blowing time can be extended, the temperature of the cloth can be reduced, and when removing the clothes in the rotating drum, there is no danger of burns and safety is improved. Can be.

(Embodiment 4) As shown in FIG. 6, the display means 11 is composed of a display lamp, and the display lamp is turned on or off by a signal from the control means 8. The control means 8 displays the fact that it is a predetermined time before the end of the operation by the display means 11 a predetermined time (for example, 10 minutes) before the end of the operation. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. Step 201 to step 208
The operations up to this point are the same as those in the second embodiment, and the description is omitted.

In step 401, the remaining one is left until the end of cooling air blowing.
If it is less than 0 minutes, the display means 11 displays at step 402 that the remaining time is 10 minutes. In the drying by the clothes dryer, the drying time varies from about 30 minutes to about 240 minutes depending on the amount of the clothes, and the user does not know when to end. Therefore, by notifying the user by a display 10 minutes before the end of the operation, the user can take out the clothing immediately after the end of the cooling air blow, and without wrinkling the clothing in the rotating drum 1, it is optimal. Clothing can be taken out in a dry condition.

When the cooling / blowing operation is completed in step 403, the display lamp of the display means 11 is turned off in step 404, and the operation is terminated in step 405.

As described above, according to the present embodiment, the display means 11 indicates that the predetermined time has passed before the end of the operation by the display means 11 a predetermined time before the end of the operation. By setting the time, or the time determined by the ambient temperature and the amount of clothing, the end of the operation can be accurately known, and the display that the operation is almost finished can be accurately notified by a display before a predetermined time.

(Embodiment 5) When the cooling air blowing time is shorter than a time indicating that a predetermined time (10 minutes) before the end of the operation is completed, the control means 8 shown in FIG. The operation is performed, and the display is made a predetermined time before the end of the operation.

The operation of the above configuration will be described with reference to FIG. Steps 201 to 207
The operations up to this point are the same as those in the fourth embodiment, and the description is omitted.

In step 501, the control means 8 executes step 2
It is determined whether the cooling air blowing time determined in 07 is equal to or longer than a predetermined time (10 minutes). If the cooling air blowing time is 10 minutes or more, the remaining 10 minutes until the end of cooling air blowing in step 503, the display means 11 turns on the display lamp in step 504 for the remaining 10 minutes.

If the cooling air blowing time is less than 10 minutes in step 501, that is, as shown in Table 2, when the ambient temperature is low or the amount of clothes is small, the cooling air blowing time is shorter than 10 minutes. Even if the remaining 10 minutes are displayed before the end of the operation, the operation will end earlier than 10 minutes.

If the cooling air blowing time is less than 10 minutes, the display means 11 immediately turns on the display lamp for the remaining 10 minutes in step 505,
At 6, the drying operation is extended. This extended time is a time obtained by subtracting the cooling air blowing time determined from the table of the storage means 9 from 10 minutes. When the extension time of the drying operation is completed, in step 507, the PTC heater 4 is turned off, and only the motor 6 is driven to perform the cooling and blowing operation. When the cooling and blowing operation is completed in step 508, the display on the display means 11 is turned off in step 509, and the operation is terminated in step 510.

As described above, according to the present embodiment, when the cooling air blowing time is shorter than the time indicating that it is a predetermined time before the end of the operation, the cooling air is blown after the drying operation is extended, and the cooling air is blown. Since it is displayed before, even in a low-temperature atmosphere or when the amount of cloth is small and the cooling air blowing time is shorter than the predetermined time, the cooling air blowing time is set to the time determined by the atmospheric temperature, or the time determined by the atmospheric temperature and the amount of clothing, and By extending the drying operation time, it is possible to accurately notify that the operation end is near by a display a predetermined time before the operation end.

[0049]

As described above, according to the first aspect of the present invention, a rotating drum for storing and drying clothes,
A blowing unit for circulating warm air into the rotating drum, a heating unit provided in a blowing path to the rotating drum, a temperature detecting unit for detecting an exhaust temperature discharged from the rotating drum, the rotating drum and the rotating drum; A motor for driving the air blowing means, a storage means for storing a relationship between a predetermined ambient temperature and a cooling air blowing time, and a control means for controlling the motor and the heating means to control a drying operation; In the cooling air blowing operation at the end of the drying operation, the cooling air blowing time is determined based on the ambient temperature estimated from the temperature detected by the temperature detecting means at the start of the drying operation and the data stored in the storage means. Reduce the temperature inside the rotating drum sufficiently without prolonging the air blowing time, and terminate the cooling air blowing operation at the cooling air blowing time determined by the ambient temperature. Door can be.

According to the second aspect of the present invention, the storage means stores the relationship between the ambient temperature, the time from the start of the drying operation to the cooling air blowing operation, and the cooling air blowing time, and the control means stores the drying operation end time. In the cooling air blowing operation, the cooling air blowing time is determined by the ambient temperature estimated from the temperature detected by the temperature detecting means at the start of the drying operation, the time from the start of the drying operation to the start of the cooling air blowing operation, and the data stored in the storage means. Therefore, the temperature inside the rotating drum can be sufficiently reduced without prolonging the cooling air blowing time, and the cooling air blowing operation can be ended in the cooling air blowing time determined by the ambient temperature and the amount of clothing.

According to the third aspect of the present invention, the control means extends the cooling air blowing time at the end of the cooling air blowing time if the temperature detected by the temperature detecting means is equal to or higher than a predetermined temperature. If the exhaust temperature of the rotating drum does not drop to a predetermined temperature, such as when the clothes dryer is used for a long time in a small room due to poor ventilation, the cooling air blowing time can be extended, the temperature of the clothes can be lowered, When taking out the clothes in the drum, there is no danger of burns, and safety can be improved.

According to the fourth aspect of the present invention, there is provided a display means, and the control means displays on the display means that the predetermined time before the end of the operation is displayed by the display means a predetermined time before the end of the operation. Therefore, the end of operation can be accurately determined by setting the cooling air blowing time to a time determined by the ambient temperature or a time determined by the ambient temperature and the amount of clothing, and a display is provided before the predetermined time to accurately notify that the end of operation is near. be able to.

According to the fifth aspect of the present invention, when the cooling air blowing time is shorter than the time indicating that the cooling air blowing time is a predetermined time before the end of the operation, the control means extends the drying operation and then performs the cooling air blowing operation. Is performed, and is displayed before the predetermined time before the end of operation, so even in a low-temperature atmosphere or when the amount of clothing is small and the cooling air blowing time is shorter than the predetermined time, the cooling air blowing time is determined by the ambient temperature, or The time determined by the ambient temperature and the amount of clothing can be set, and the drying operation time can be extended to accurately notify that the operation end is near by a display a predetermined time before the operation end.

[Brief description of the drawings]

FIG. 1 is a circuit diagram in which a clothes dryer according to a first embodiment of the present invention is partially blocked.

FIG. 2 is a sectional view of the clothes dryer.

FIG. 3 is an operation flowchart of a main part of the clothes dryer.

FIG. 4 is an operation flowchart of a main part of a clothes dryer according to a second embodiment of the present invention.

FIG. 5 is an operation flowchart of a main part of a clothes dryer according to a third embodiment of the present invention.

FIG. 6 is a partially block diagram of a clothes dryer according to a fourth embodiment of the present invention.

FIG. 7 is an operation flowchart of a main part of the clothes dryer.

FIG. 8 is an operation flowchart of a main part of a clothes dryer according to a fifth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary drum 2 Heat exchange type both-wings fan (blowing means) 3 Blowing path 4 PTC heater (heating means) 6 Motor 7 Temperature detecting means 8 Control means 9 Storage means

Claims (5)

[Claims] A rotating drum for storing and drying clothes;
A blowing unit for circulating warm air into the rotating drum, a heating unit provided in a blowing path to the rotating drum, a temperature detecting unit for detecting an exhaust temperature discharged from the rotating drum, the rotating drum and the rotating drum; A motor for driving the air blowing means, a storage means for storing a relationship between a predetermined ambient temperature and a cooling air blowing time, and a control means for controlling the motor and the heating means to control a drying operation; Is a clothes dryer in which a cooling air blowing time is determined based on an ambient temperature estimated from a temperature detected by a temperature detecting means at the start of a drying operation and data stored in the storage means in a cooling air blowing operation at the end of the drying operation. . 2. The storage means stores the relationship between the ambient temperature, the time from the start of the drying operation to the cooling air blowing operation, and the cooling air blowing time, and the control means stores the cooling air blowing operation at the end of the drying operation at the start of the drying operation. The clothing drying according to claim 1, wherein the cooling air blowing time is determined based on the atmosphere temperature estimated from the temperature detected by the temperature detecting means, the time from the start of the drying operation to the start of the cooling air blowing operation, and the data stored in the storage means. Machine. 3. The control means, at the end of the cooling air blowing time, if the temperature detected by the temperature detection means is equal to or higher than a predetermined temperature.
3. The clothes dryer according to claim 1, wherein the cooling air blowing time is extended. 4. The display device according to claim 1, further comprising a display unit, wherein the control unit displays the predetermined time before the end of the operation by the display unit a predetermined time before the end of the operation. A clothes dryer according to claim 1. 5. When the cooling air blow time is shorter than a time indicating that the predetermined time before the end of the operation is displayed, the control means performs the cooling air blow after extending the drying operation and displays the display before the predetermined time before the end of the operation. The clothes dryer according to claim 4, wherein