JP2755861B2 - 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 rotary drum type clothes dryer using a steam type heater.

[0002]

2. Description of the Related Art Conventionally, in this type of clothes dryer, a heater to which heated steam is supplied, a rotating drum for containing clothes, and a blower fan are provided in a dryer body having an inlet and an outlet. It is arranged so that the air flowing from the air inlet through the operation of the fan is heated by a heater and supplied as hot air into the rotating drum to dry the clothes.

In the drying step, as shown in Japanese Utility Model Application Laid-Open No. 62-175800 (D06F 58/28), steam is supplied to the steam inlet side of the heater.
An electromagnetic valve for controlling the stop is provided, and is opened and closed in conjunction with a temperature controller for adjusting the outlet temperature of the rotating drum, thereby controlling the temperature of hot air in the rotating drum.

[0004] After the drying step by the hot air is completed, a cooling down step of the clothes by the cold air is executed. In this method, the heater is stopped by closing the solenoid valve, and the air passing through the heater is blown into the rotating drum without heating, thereby cooling the clothes.

[0005]

In a conventional clothes dryer, when clothes are dried, the temperature of hot air is adjusted by repeatedly supplying and stopping steam to a heater by an electromagnetic valve. In such a configuration, there is a danger that solid matter such as scale and rust generated in the steam pipes may be clogged in the solenoid valve during operation of the solenoid valve, thereby causing an operation trouble.

In addition, the temperature of the air passing through the heater does not change until a short time after the supply of steam to the heater by the solenoid valve and the stop, and the temperature of the air blown to the rotating drum after the stop of the steam is particularly high. There is a drawback that the temperature control of the rotary drum does not decrease and the temperature control of the rotary drum becomes slow, and that there is a large error with respect to the set temperature, so that fine temperature control is difficult.

Further, in the cool-down step after drying, the clothes are cooled by passing the outside air through the heater to which the steam supply has been stopped. Has the disadvantage of being longer.

The present invention has been made in consideration of such problems of the prior art, and an object of the present invention is to provide a heater in which heating steam is constantly supplied to a heater.
The purpose of the present invention is to provide a clothes dryer capable of controlling the temperature in the rotating drum without using a solenoid valve for supplying and stopping steam and using a heater to control the temperature more accurately. An object of the present invention is to provide a clothes dryer having an improved cooling capacity.

[0009]

In order to achieve the above object, a clothes dryer according to the present invention collects clothes to be dried.
Rotating drum for supplying dry air to the rotating drum
Air duct and blower fan and heating to heat dry air
A clothes dryer comprising: a heater;
Using a steam heater to which hot steam is constantly supplied,
The drying air is passed through a steam heater,
Switching between heating and not passing through a steam heater
And drying temperature in the rotating drum
And a temperature measuring device for measuring the temperature of the temperature measuring device.
A switching mechanism for switching the damper based on the
Configuration.

[0010]

According to the clothes dryer of the present invention, the heating steam is constantly used.
When using steam heater supplied, during drying, to drive the rotating drum and the blower fan, when the outlet temperature of the rotating drum is lower than the set temperature intake damper closes the inlet damper opening. Therefore, the outside air sucked in from the air inlet by the blower fan exchanges heat through the heater, is supplied as hot air into the rotating drum, and heats and dries the clothes stored in the rotating drum.

When the outlet temperature of the rotary drum becomes higher than the set temperature, the intake damper opens the intake damper port and closes the outlet of the heater, so that the outside air sucked from the intake damper port by the blower fan directly flows into the rotary drum. And mixed with the hot air to adjust the temperature in the rotating drum.

Thereafter, the intake damper closes either the intake damper port or the outlet of the heater in accordance with the outlet temperature of the rotary drum, and the temperature in the rotary drum is controlled.

On the other hand, in the cool-down step after the drying step, the outlet of the heater is forcibly closed by the suction damper, so that the outside air flowing in from the suction damper port directly cools the clothes in the rotary drum, and the short-circuit is performed. Cool down of clothing is realized in time.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. In these drawings, 1 is a dryer body,
A heater 2, to which heating steam is supplied in order from the top, a rotating drum 3 for containing clothes, and a blower fan 5 rotated by a fan motor 4 are provided.
An air passage is formed through the rotating drum 3 and the fan 5 to the exhaust port 7.

As shown in FIG. 4, the heater 2 is connected only to a steam supply pipe via a strainer 8 at its steam inlet, and is not provided with a conventional inlet solenoid valve. A steam trap for drain discharge is connected to the steam outlet of the heater 2. Outlet of heater 2 and rotating drum 3
An intake damper port 9 is opened in a communication passage between the heater 2 and an intake damper 10 provided immediately after the heater 2 is rotated by a torque motor 11 shown in FIG. Any one of the above can be selectively closed.

The rotary drum 3 is rotatably supported by a shaft 12 provided on a rear surface thereof, and a front door 13 is opened to allow clothes to be taken in and out. A drum motor 14 is provided on the rear upper portion of the main body 1. A motor pulley 15 mounted on the output shaft is connected to an intermediate large pulley 17 of a relay shaft 16 via a belt. The small pulley 18 is connected to the drive pulley 19 of the shaft 12 via a belt, and the rotating drum 3 is rotated (reversed) at a low speed by the motor 14. Further, the ventilation passage between the rotating drum 3 and the fan 5 includes a rotating drum 3
Temperature detector 20 and lint filter 2 for detecting outlet temperature
1 is provided.

The detection signal from the temperature measuring element 20 is input to a control box 22 arranged on the upper front side of the main body 1. As shown in FIG. 2, an operation panel 23 provided on the front of the control box 22 has a temperature controller 24 for adjusting the outlet temperature of the rotary drum 3 to a set temperature in accordance with a detection signal from the temperature sensor 20.
A drying time timer 25, a cool air time timer 26, an operation start switch 27, and the like are provided.

FIG. 6 is a flowchart showing the control operation of the control box 22. Next, the operation of the above-described embodiment will be described with reference to FIG. Prior to the operation, the drying temperature, that is, the rotating drum 3 is controlled by the temperature controller 24.
Is set to a desired value (set temperature T ₀ ), and heated steam is supplied to the heater 2.

The drying time t is stored in the drying time timer 25.
_After setting the cool-down time t ₂ in the cool air time timer 26 and opening the door 13 to store the clothes in the rotating drum 3, the operation start switch 27 is turned on.

This starts the control shown in FIG.
First, the drum motor 14 is turned on to rotate (reverse) the rotating drum 3 at low speed, and the fan motor 4 is turned on to start blowing air into the rotating drum 3.
The drying time timer 25 operates and the drying process starts.

In the initial stage of the operation, the outlet temperature of the rotary drum 3 is low, and the detected temperature T of the temperature measuring body 20 is equal to the set temperature T.
_Since it is lower than ₀ , the intake damper 10 is operated to be closed, that is, the intake damper port 9 is closed. Therefore, as shown by a solid arrow in FIG. 1, outside air sucked from the intake port 6 passes through the heater 2. It is heated and turned into hot air and sent into the rotating drum 3 to heat and dry the clothes. The air from the rotating drum 3 passes through the filter 21 and is discharged outside through the fan 5 and the exhaust port 7.

The temperature T detected by the temperature measuring element 20 is equal to the set temperature T.
_When it reaches ₀ , the intake damper 10 is opened, the intake damper port 9 is opened, and the outlet of the heater 2 is closed.
For this reason, as indicated by a two-dot chain line arrow in FIG.
And is mixed with the hot air contained in the rotating drum 3 to lower its temperature.

Further, when the temperature T detected by the temperature measuring element 20 becomes lower than the set temperature T ₀ , the intake damper is closed, the intake damper port 9 is closed, and the outlet of the heater 2 is opened. heated air is supplied into the rotary drum 3, since the drying time timer 25 until the time is up, operation is repeated as described above, the clothes are heated and dried at a set temperature T _0.

[0024] After that, when the elapsed time t from when the operation start a dry time t _1, drying time timer 25 is timed up, continued cold air time timer 26 is activated, and the process proceeds to the cool-down process. In this step, as shown in FIG. 5, the intake damper 10 is opened unconditionally, cool air from the intake damper port 9 is sent into the rotary drum 3, and the cool air time timer 26 times out, that is, the elapsed time. t is the total time t _{1 of the} drying time t ₁ and the cooling time t ₂
Cooling of clothing is performed until + t ₂ is reached.

Then, when the time of the cool air time timer 26 is up, the cool down process is completed and the intake damper 10
Is returned to the initial closed state, the drum motor 14 and the fan motor 4 are both turned off, and a series of operations is completed.

[0026]

Since the present invention is configured as described above, it has the following effects. The steam heater is configured so that heating steam is always supplied.
Configuration to repeat supply and stop of steam to vessel, concrete
In the like becomes unnecessary electromagnetic valve, there is no behavior problems, such as by clogging of the solenoid valve, stable operation can be expected. Ma
In addition, when adjusting the temperature, cool air that does not pass through the heater can be introduced directly into the rotating drum to suppress the rise in temperature, so that fine temperature control can be achieved and the drying finish can be improved. Can be

Further, in the cool-down step after the drying step, the outlet of the heater is forcibly closed by the suction damper, so that the cool air from the suction damper port can be directly supplied to the inside of the rotary drum. The cooling capacity is greatly increased, and the cooling time can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a front view of the embodiment.

FIG. 3 is a rear view of the embodiment.

FIG. 4 is a cut-away side view of the embodiment.

FIG. 5 is a cut side view in a cool down step of the embodiment.

FIG. 6 is a flowchart for explaining the operation of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dryer main body 2 Heater 3 Rotary drum 5 Blow fan 6 Intake port 7 Exhaust port 9 Intake damper port 10 Intake damper 27 Temperature controller

Claims (1)

(57) [Claims] A rotating drum for storing clothes to be dried;
Ventilation path and blower fan for supplying dry air to the transfer drum
And clothes drying device comprising a heater for heating the drying air
In the apparatus, the heater is provided with a steam heating in which heating steam is constantly supplied.
A steam heater provided in connection with the ventilation path,
Through the heater or not through the steam heater
And a temperature measuring device for measuring a drying temperature in the rotating drum.
When the switching of the damper based on the measured temperature of the temperature measuring device
Clothing having a switching mechanism for performing
Dryer.