JPH1119400A - Drum type clothes dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type clothes dryer which can prevent clothes to be dried from shrinking and being damaged to retain their shapes and can dry them evenly. SOLUTION: This drum type clothes dryer dries clothes retaining much water, when they are at a standstill, with hot wind supplied into the drum 3 by rotating a heat exchange fan 6 while the drum 3 is stopped. And when water in the clothes is reduced and the clothes are almost dried, the drum is rotated to do the finish dry, reversely turning the clothes. In this way, when clothes include much water and may easily get out of shape if agitated, the clothes are dried at a standstill without rotating the drum. And after that, when the clothes include less water and may not get out of shape so easily, the clothes are agitated and dried by rotating the drum. Therefore, clothes can retain their shape and can be evenly dried at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum-type clothes dryer, and more particularly to a structure and operation control for reducing shrinkage of clothes due to drying and shape reduction due to damage.

[0002]

2. Description of the Related Art In a conventional drum-type clothes dryer, a tumbler drying method in which clothes are lifted by a baffle by rotating a drum and being dried while falling is largely distorted due to damage or shrinkage of cloth. A stationary drying method and a clothes dryer in which a drying shelf is installed in a drum in a stationary state for drying clothes and clothes are placed on the drying shelf and dried are proposed. However, since the drum itself rotates, the drying shelf must be sized so as not to come into contact with the baffle that protrudes into the inner surface of the drum and stirs the clothes, and the size of the clothes that can be spread and placed is limited. There were many.

Further, a drying method and a clothes dryer for drying clothes by circulating warm air in the drum while the drum is stopped have been proposed. However, if the clothes are dried while being kept stationary in the drum, there is a problem that drying unevenness occurs and uniform drying cannot be performed.

[0004] A drying method and a clothes dryer have been proposed in which a drum is dried while being repeatedly rotated and stopped, thereby reducing the shape collapse due to shrinkage or damage of clothes. However, when clothes containing a large amount of water fall along with the rotation of the drum, a large force acts on the clothes,
There is a problem that the effect of reducing the shape loss due to shrinkage or damage of the clothes is significantly reduced.

[0005]

The conventional drum-type clothes dryer has a problem in that when drying is performed while the clothes are kept stationary without rotating the drum in order to prevent the clothes from being deformed due to shrinkage or damage, the drying unevenness occurs. In addition, if the clothes are dried while stirring the clothes by rotating the drum periodically, there is a problem that the shape-preventing effect is significantly reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drum-type clothes dryer capable of reducing the shape collapse due to shrinkage or damage caused by stirring clothes and preventing uneven drying.

Another object of the present invention is to provide a drum type clothes dryer suitable for that purpose.

[0008]

According to the present invention, there is provided a drum for accommodating clothes, a heater and a blower fan for supplying warm air to the drum, a rotary driving device for rotating the drum and the blower fan, In a drum-type clothes dryer having a control device that controls a heater and a rotation drive device,
When the clothes contain a large amount of water, the fan is rotated while the drum is stopped, and warm air is supplied into the drum to keep the clothes stored in the drum stationary. The main drying is performed to reduce the shape loss, and the final drying is performed by rotating the drum at the end of drying when most of the moisture in the clothes evaporates and the clothes are inverted while drying. It is intended to prevent uneven drying without drying.

[0009]

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

FIG. 1 is a vertical sectional side view of a clothes dryer according to an embodiment of the present invention, FIG. 2 is a vertical sectional front view thereof, and FIG. 3 is a vertical sectional side view of a hot air generator.

Inside the outer frame 1, a drum 3 for accommodating clothes is rotatably supported by a drum bearing 3-1 fitted on a drum shaft 9-1 and a drum support 17. The drum shaft 9-1 is formed at the center of the drum / fan support plate 9 attached to the rear surface of the outer frame 1 so as to protrude inside the support plate 9 by a shaft fixed so as to penetrate the support plate. I do. The drum support 17 includes an annular protrusion that slides and fits on the inner peripheral side of an annular opening edge 3-4 formed on an end plate of the drum 3 on the clothing inlet side to support the drum 3. ,
The outer frame 1 is attached to the outer frame 1 so as to close a gap between the outer periphery of the clothes input port 20 attached to the outer frame front plate 1-1 constituting the front portion and the opening edge 3-4 of the drum 3.

A motor 4 constituting the rotary drive unit is mounted so as to be suspended inside the outer frame 1 by a motor base 4-1, and a one-way clutch 4 is mounted on one side of the rotary shaft.
-3, the drum drive pulley 4-2 is attached, and the fan drive pulley 4-4 is directly attached to the other side. Then, the drum 3 is rotated by the drum driving pulley 4-2 and the drum belt 15 wrapped around the outer periphery of the drum 3. When the motor 4 rotates in the forward direction, the one-way clutch 4-3 applies its rotational force to the drum driving pulley 4-2.
To rotate the drum 3, and when the drum 3 rotates in the opposite direction, the drum 3 idles to bring the drum 3 into a stationary state. The tension applying pulley 13 presses the drum belt 15 to remove looseness.

A baffle (not shown) is provided inside the drum 3 for efficiently stirring the clothes.

Reference numeral 2 denotes a door attached to the outer frame front plate 1-1, which opens and closes a clothes input port 20 when clothes are taken in and out of the drum 3.

Behind the drum exhaust port 3-2 (rear side of the drum 3) formed in the end plate on the back side of the drum 3, a fan casing 8 and a heat exchange fan 6 housed in the fan casing 8 are provided.
Is installed. The fan casing 8 is provided with the drum
The heat exchange fan 6 is fixed to the fan support plate 9, and the heat exchange fan 6 is rotatably supported by a fan shaft 9-2 fixed to the drum / fan support plate 9 and formed so as to protrude outside the support plate 9. . The heat exchange fan 6 is connected to a fan drive pulley 4-4 attached to a rotation shaft of the motor 4 via a fan belt 10 so as to be rotated by the motor 4.

The heat exchange fan 6 has a fan-shaped labyrinth seal mechanism formed by combining a comb-shaped rib formed on the outer periphery and a comb-shaped rib formed on the partition plate 7 in a non-contact state. By partitioning the inside of the casing 8, a circulation side air passage A and a cooling side air passage B are formed on both sides (front and back sides) of the heat exchange fan 6. The heat exchange fan 6 circulates warm air in the drum 3 in the circulation side air path A, and in the cooling side air path B, a back plate intake port provided on a back plate 14 covering the rear surface of the outer frame 1. This is a so-called heat exchange type blower fan of both front and rear sides that sucks and exhausts outside air through a (not shown) and a back plate exhaust port (not shown). This heat exchange fan 6
The wings on both front and back surfaces are formed in an inclined shape so as to obtain a characteristic of increasing the blowing efficiency and reducing noise in the normal rotation state.

5 is a heater for supplying warm air,
The first heater 5-
1 and the second heater 5-2 in combination, and are installed immediately before a drum intake port 17-1 formed slightly below the center of the side portion of the drum support 17. The drum air intake port 17-1 is configured to supply hot air blown into the drum 3 to the drum 3.
And a wind direction plate directed toward the lower part of the vehicle.

Reference numeral 16 denotes a lint collecting device for collecting dust such as lint generated from clothes in the drum 3.
Collection net 1 installed immediately before the drum exhaust port 3-2
It is detachably attached to the filter support 19 provided with 9-1.

The casing discharge port (not shown) of the fan casing 8 and the drum intake port 17-1 are connected in an airtight manner by a rear circulation duct 11 and a front circulation duct 12 having a drain port 11-1 on the way. Thus, in order to circulate the air in the drum 3, the drum 3 → the lint collecting device 16 → the drum exhaust port 3-2 → the fan casing 8 (circulation side air passage A) → the casing discharge port → the rear circulation duct. 11
→ Front circulation duct 12 → Heater 5 → Drum intake 17-
1 → circulation air path of the drum 3 is formed.

Reference numeral 18 denotes a control device for controlling the motor 4 and the heater 5, which is mounted so as to be located inside the outer front plate 1-1 via the board of the operation panel 18-1.

FIG. 4 is a block diagram of a drive system and a control system. The control device 18 includes an operation panel 18-1, a power supply circuit 18-2, a microcomputer 18-3, and a drive circuit 18-4. The power supply circuit 18-2 includes the commercial power supply 2
1 to generate a control power supply and a drive power supply. The microcomputer 18-3 receives an instruction from the operation panel 18-1 and detection signals from the rotation sensor 22 and the humidity sensor 23 to perform arithmetic processing for controlling the motor 4 and the heaters 5-1 and 5-2. Then, the power supply to the motor 4 and the heaters 5-1 and 5-2 is controlled via the drive circuit 18-4.

The motor 4 uses a reversible-rotation type condenser motor, and is configured to generate a large torque in the forward rotation direction in which the drum 3 and the heat exchange fan 6 are driven together. The heater 5 includes first and second heaters 5-1 and 5-1 so that the temperature of the hot air can be stably adjusted.
2. Then, the driving circuit 18-4
Is provided with a semiconductor AC switch for controlling a rotation direction (forward / reverse rotation) by switching a power supply terminal (a common terminal and a main coil terminal or an auxiliary coil terminal) to the motor 4 and controlling phase control and rotation / stop. Also, two relays are provided which can arbitrarily intermittently supply power to the two heaters 5-1 and 5-2.

The rotation sensor 22 is configured to generate a detection signal corresponding to the rotation speed of the drum 3, and a humidity sensor 23
Is configured to generate a detection signal corresponding to the humidity of the circulating warm air exhausted from the drum exhaust port 3-2.

The clothes dryer configured as described above puts clothes into the drum 3 through the clothes inlet 20 and performs a drying operation. The control process of the drying operation is executed by the microcomputer 18-3 in accordance with an instruction from the operation panel 18-1.

When the normal drying (standard drying course) is instructed, the microcomputer 18-3 executes the drying operation control processing of the standard drying course as shown in FIGS. The drying operation using the standard drying course is a drying method in which warm air is circulated while the clothes are stirred to efficiently dry the clothes.

In step 501, the operation panel 18
When it is confirmed that the standard drying course switch of -1 has been pressed and turned on, the driving circuit 18-4 is controlled so that the common terminal and the main coil terminal of the motor 4 are supplied with power and the motor 4 is rotated forward in step 502. Then, in step 503, the driving circuit 18-4 is controlled so that the two heaters 5-1 and 5-2 generate heat. By this control processing, the clothes dryer is brought into an operating state in which the clothes 3 are dried by rotating the drum 3 to circulate warm air while stirring the clothes. The microcomputer 18-3 detects the rotation speed of the drum 3 at this time based on the detection signal from the rotation sensor 22, and executes the speed control of the motor 4 so that the drum rotation speed becomes a predetermined value. This speed control is performed by phase control in which a part of the waveform of the AC voltage supplied to the motor 4 is cut off by a semiconductor AC switch.

Next, in step 504, the detection signal output from the humidity sensor 23 is monitored to determine that the humidity is 20%.
Wait for: During this time, the moisture evaporated from the clothes passes through the lint collecting device 16 together with the circulating wind, and flows into the circulation side air passage A of the fan casing 8 through the drum exhaust port 3-2. In addition, outside air flows into the cooling-side air passage B of the fan casing 8 from the back plate intake port of the back plate 14, and is exhausted from the back plate exhaust port. Since the circulating hot air and the cooling air are separated from each other by the labyrinth seal mechanism with the partition plate 7 at the outer peripheral portion of the heat exchange fan 6, the circulating side wind of the fan casing 8 is formed on the front and back of the heat exchange fan 6. The heat exchange between the air flowing through the path A and the air flowing through the cooling-side air path B is performed. Then, the moisture contained in the circulating hot air is condensed and turned into water, flows into the circulation duct 11 from the casing discharge port 8-1 of the fan casing 8, and is discharged out of the machine through the drain port 11-1. Thus, the clothes drying operation is performed.
In this drying operation, dust such as lint generated from clothes in the drum 3 is collected by the lint collecting device 16 and removed from the circulating wind.

When the humidity of the circulating hot air becomes 20% or less, in step 505, the power supply to the heaters 5-1 and 5-2 is cut off to stop the heating of the circulating air, thereby starting the cooling operation. At 506, the elapse of 10 minutes is monitored, and thereafter, the power supply to the motor 4 is cut off, and the full drying operation is completed.

Drying of clothes that are worried about fabric damage or shrinkage is performed by controlling the drying operation as shown in FIGS. 7 and 8 by instructing a fashionable drying course by the operation panel 18-1. This fashionable drying course performs the main drying (still drying) by circulating warm air while holding the clothes in a stationary state in the drum, and finish-drying while gently stirring so that the clothes are inverted at the end of drying. Is a drying method. The user puts the garment in the lower area on the inner surface of the drum 3 so as not to lose its shape, and operates the operation panel 1.
The fashionable clothes drying switch of 8-1 is pressed to instruct the fashionable clothes drying.

When the microcomputer 18-3 confirms in step 701 that the fashionable drying course switch of the operation panel 18-1 has been pressed and turned on, the microcomputer 18-3 supplies power to the common terminal and the auxiliary coil terminal of the motor 4 in step 702. Then, the drive circuit 18-4 is controlled to rotate the motor 4 in the reverse direction.
The drive circuit 18-4 is controlled so that the two heaters 5-1 and 5-2 generate heat. Due to this control processing, the motor 4 rotates in the reverse direction, the one-way clutch 4-3 idles, the drum 3 is stopped, the heat exchange fan 6 rotates in the reverse direction, and the heaters 5-1 and 5-1, 2 generates heat and circulates warm air to the drum 3. In this control state, the rotation sensor 22
Is stopped, the microcomputer 18-3 controls the drive circuit 18-4 so that the motor 4 rotates in the reverse direction with full power. This allows
The motor 4 rotates in the reverse direction with low output torque characteristics, but enters a high-speed rotation state because there is no load for rotating the drum 3. Generate wind.

Then, in order to prevent the temperature of the circulating hot air from excessively rising, the energization time to the heater (2) 5-2 is monitored in step 704. Then, when the energization time to the heater 5-2 elapses a predetermined time (1 minute), the process proceeds to step 705 to cut off the power supply to the heater 5-2. Then, in step 706, the heater 5-2
It is monitored that the cut-off time of the predetermined time (6.5 minutes) has elapsed, and when the predetermined time has elapsed, the process returns to step 703 and returns to step 703.
Power is supplied to the heaters 5-1 and 5-2. Such intermittent control of the heater (2) 5-2 is monitored in step 707 so as to be repeated a predetermined number of times (eight times). In such static drying, most of the moisture contained in the clothes evaporates, the clothes become lighter, and even if the drum 3 is rotated to turn over the clothes, the clothes do not shrink or be damaged and do not lose their shape. The main drying is performed until such a dry state is obtained, and the number of repetitions is set so that a drying time until such a dry state is obtained. Therefore, the control of the still drying can be performed based on the temperature detection and the humidity detection of the circulating hot air.

In such main drying, drying of the clothing surface to which the hot air is satisfactorily proceeds advances, and the inner surface and the lower surface are hardly hit by the hot air, so that the drying of the portion is delayed and uneven drying occurs. In order to eliminate this uneven drying, the following finish drying is performed.

First, in step 708, the power supply to the heater (1) 5-1 and the motor 4 is cut off (at this time, the power supply to the heater 5-2 is already cut off). Then, in step 709, a pause time of a predetermined time (20 seconds) is secured. This pause time is for stopping the inertial rotation of the motor 4. Then, step 71
0, the drive circuit 18-4 is controlled so as to rotate the motor 4 in the forward rotation direction.
Drive circuit 1 to supply power to the two heaters 5-1 and 5-2.
8-4 is controlled. In this control state, the one-way clutch 4-3 transmits the rotation torque of the motor 4 to the drum 3 to rotate the drum 3 and agitate the clothes in the drum 3 because the motor 4 rotates in the forward rotation direction. become.

At step 712, it is monitored that a predetermined time (one minute) has elapsed since the energization time of the heater 5-2 has elapsed.
The power supply to 2 is cut off. Then, in step 714, the shutoff time of the heater 5-2 is a predetermined time (6.5 minutes).
Is monitored, and after the elapse of the predetermined time, in step 715, the power supply to the motor 4 and the heater 5-1 is cut off (the power supply to the heater 5-2 is already in a cut-off state). , A pause time of a predetermined time (20 seconds) is secured.

In the finish drying between steps 710 and 716, a drying method is performed in which the clothes are dried by rotating the drum 3 and circulating warm air while stirring the clothes, but the clothes have little moisture. In the state of the end of drying,
In addition, since the time is short, there is no occurrence of shape collapse due to shrinkage or damage to the cloth.

Next, in step 717, the cooling circuit for generating circulating air with the drum 3 stopped is started by controlling the drive circuit 18-4 so as to rotate the motor 4 in the reverse rotation direction. The cooling operation time of a predetermined time (10 minutes) is secured by 718, and the power supply to the motor 4 is cut off in step 719, and the drying control process of the fashionable drying course is completed.

In this fashionable drying method, the main drying is performed in a state where the clothes are stationary without rotating the drum 3, so that the drum 3 is intermittently rotated to dry the clothes while stirring. Although the drying time is longer than that of the method, the fabric damage and shrinkage can be greatly reduced, and the final drying is performed by rotating the drum 3 and drying while stirring the clothes at the end of drying. Thereby, drying unevenness can be eliminated.

It is convenient to prepare a plurality of types of fashionable clothes drying methods in this fashionable clothes drying course so that the operating panel can be selected. One such drying method is a drying method in which the agitating effect of the clothes is further weakened to further enhance the function of preventing the clothes from being out of shape. Still another drying method is a drying method in which the drying time is shortened even if the effect of preventing shape collapse is slightly sacrificed.

FIG. 9 is a time chart of a fashionable drying method for further enhancing the effect of preventing shape collapse. In this fashionable drying method, the time required for rotating the drum 3 to agitate the clothes at the end of drying (drum rotation time = forward rotation time of the motor 4) is reduced, thereby weakening the agitation of the clothes and causing shrinkage or damage. This is a drying method that minimizes generation.
In this embodiment, the drum rotation (the forward rotation of the motor 4) in a very short time is set to be performed twice at intervals.
In addition, the heater 5-2 is energized only at the end of drying to generate heat, so that main drying is performed with relatively low temperature circulating hot air, and the temperature of the circulating hot air is raised at the end of drying. .

FIG. 10 is a time chart of a fashionable drying method for shortening the drying time while slightly sacrificing the shape-preventing effect. This fashionable drying method is a drying method in which the drum 3 is periodically rotated from the beginning of the fashionable drying to enhance the stirring of the clothes, thereby increasing the drying efficiency. Further, the energizing time to the heater 5-2 is increased, and the heater 5-2 is dried by a relatively high temperature circulating hot air.

These modified dressing / drying methods can be set in place of the dressing / drying course shown in FIGS. 7 and 8.

This clothes dryer is provided with a drying function (shoe drying course) for drying footwear such as shoes and slippers and a cloth bag in a stationary state so as not to lose their shape. This shoe drying course is a drying method in which a shoe is placed in a lower area in a drum in the same manner as fashionable drying, and the whole drying step is performed without rotating the drum.

When the shoe is to be dried in the shoe drying course, the user places the shoe 24 in the lower area of the drum 3 as shown in FIG. 13 and presses the shoe drying course switch on the operation panel 18-1. Instruct shoe drying.

When the shoe drying course is instructed, the microcomputer 18-3 executes a drying operation control as shown in FIGS. First, step 1101
In step 110, when it is confirmed that the shoe drying course switch on the operation panel 18-1 is pressed and turned on,
In step 2, the drive circuit 18-4 is controlled to rotate the motor 4 in the reverse direction, and in step 1103, the drive circuit 18-4 is controlled to supply power to the heater 5-1.
Due to this control process, the motor 4 rotates in the reverse direction, so that the one-way clutch 4-3 idles and the drum 3 is stopped, the heat exchange fan 6 rotates in the reverse direction, and the heater 5-1 generates heat. This is a drying step in which warm air is circulated through the drum 3.

In this warm air drying step, a predetermined time (80 minutes) of warm air drying time is secured in step 1104, and then, in step 1105, the power supply to the heater 5-1 is shut off to stop the circulation air heating. Then, the cooling operation is started, and after a cooling operation time of a predetermined time (10 minutes) is secured, in step 1107, the motor 4 is stopped to end the entire drying process.

It is convenient to prepare a plurality of drying methods for the shoe drying course that are selected according to the type of shoes to be dried. FIG. 14 is a time chart of a shoe drying method in which the temperature of the circulating hot air is increased to shorten the drying time. In this method, power is supplied to the heater 5-2 periodically from the beginning of drying.

FIG. 19 is a time chart of a shoe drying method in which the temperature of the circulating hot air is lowered so as to be able to cope with a material which is weak to a high temperature. This is a method of supplying power and drying with power consumption of 500 W or less.

In fashionable drying, it is difficult to spread heavy clothes containing a large amount of water so as not to lose their shape on the lower curved surface in the drum 3. A force in the direction of sliding down the curved surface of the drum 3 by its own weight and moving to a low area acts on each portion of the wet and heavy clothing, and the clothing as a whole is in a compressed state. If the clothes are dried in this compressed state, they cause shrinkage. Therefore, it is desirable that the inner surface of the drum 3 can hold each portion of the garment that has been dried without slipping.

The inner wall surface of the drum 3 can be prevented from slipping by processing the inner wall surface of the drum 3 into a non-slip structure. This non-slip operation is performed by using a buffer sheet provided on the inner wall surface of the drum in order to absorb an impact sound generated when a button or the like of clothing falling due to rotation of the drum 3 collides with the inner wall surface of the drum. This is convenient.

FIGS. 15 and 16 show an embodiment in which a buffer sheet provided on the entire inner wall of the drum 3 has a slip preventing function.

The embodiment shown in FIG. 15 shows a cushioning sheet 25 whose surface is roughened to increase the coefficient of friction with clothing 30.
It is a structure provided with.

The embodiment shown in FIG. 16 is a cushioning sheet 2 having a wavy surface to increase the coefficient of friction with clothing 30.
6 is provided.

In these embodiments, the buffer sheets 25, 2
6, the anti-slip processing can be performed on the sheets 24 and 25, which is extremely easy to implement. In addition, since the entire circumference of the inner wall of the drum 3 is non-slip, even if the drum 3 is stopped at any rotational position, it is possible to perform stylish drying at that rotational position.

FIGS. 17 and 18 show an embodiment in which a part of the inner wall surface of the drum 3 is non-slip. Clothing 3
It is sufficient that the non-slip against 0 is applied to the area where the clothes 30 are dried while the drum 3 is stopped, and the area of 1/4 to 1/2 circumference of the inner peripheral wall of the drum is practical. In these embodiments, the non-slip members 27 and 28 are provided in a region between the two baffles 3-3. Such an embodiment,
Since the non-slip members 27 and 28 attached to the inner wall of the drum become smaller, the decrease in the inner volume of the drum can be reduced.

The embodiment shown in FIG. 17 has a structure in which a non-slip member 27 of a molded product having a roughened surface of the PP material is attached to the inner wall of the drum 3 to prevent the clothes 30 from slipping.

In the embodiment shown in FIG. 18, a large number of ridges 28-1 are formed in the axial direction of the drum 3 to make the clothes 30 placed thereon less slippery, and a ventilation space is provided below the clothes 30. This is a structure in which a non-slip member 28 of a molded product of PP material is formed on the inner wall of the drum 3. The ridge 28-1 is 5 mm below the clothing 30 placed thereon.
It is preferable to form them at such a height and an interval that a space having the above height is formed.

In each of these embodiments, the coefficient of friction of the inner wall surface of the drum 3 is set so as to prevent the wet garment 30 that has been dried out from sliding down and becoming compressed.
It is desirable to set it to 1 or more for the dry cloth of the IS test cloth. And these non-slip can also be processed directly on the inner wall of the drum 3.

[0058]

According to the present invention, the clothes are dried while the clothes are kept stationary without rotating the drum during the dry period when the water content is large and the shape is likely to lose shape when agitated. Since the ram is rotated during the drying time when drying is less likely to occur due to agitation and shape loss due to agitation, drying is performed while agitation of the clothing is performed, so that both out of shape and uneven drying of the clothing can be eliminated.

A driving mechanism for rotating / stopping the drum and rotating the blower fan by one motor using a drum torque transmission system having a one-way clutch,
The combination of the blowing characteristics of the counter-rotating blower and the reversible rotating condenser motor, the rotation control of the motor, and the prevention of slipping of the drum inner wall realize the drum-type clothes dryer that performs the clothes drying described above. The preferred configuration means can be provided.

[Brief description of the drawings]

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

FIG. 2 is a vertical sectional front view of the drum-type clothes dryer shown in FIG.

FIG. 3 is a vertical sectional side view of a hot air generator in the drum-type clothes dryer shown in FIG. 1;

FIG. 4 is a block diagram of a drive system and a control system of the drum-type clothes dryer shown in FIG.

FIG. 5 is a flowchart of a drying operation control process of a standard drying course executed by the control device in the drum-type clothes dryer shown in FIG. 1;

FIG. 6 is a time chart of a drying operation control process shown in FIG. 5;

FIG. 7 is a flowchart of a drying operation control process of a stylish dressing course executed by the control device in the drum-type clothes dryer shown in FIG. 1;

FIG. 8 is a time chart of a drying operation control process shown in FIG. 7;

FIG. 9 is a time chart of a drying operation control process shown in FIG. 7;

FIG. 10 is a time chart of a drying operation control process shown in FIG. 7;

11 is a flowchart of a drying operation control process of a shoe drying course executed by the control device in the drum-type clothes dryer shown in FIG. 1;

FIG. 12 is a time chart of a drying operation control process shown in FIG. 11;

FIG. 13 is a vertical sectional front view of the drum-type clothes dryer shown in FIG.
It is sectional drawing.

14 is a time chart of the drying operation control process shown in FIG.

FIG. 15 is a vertical sectional front view showing an embodiment of a drum in which a drum inner wall is provided with a non-slip surface in the drum-type clothes dryer of the present invention, and an AA cross-sectional view thereof.

FIG. 16 is a longitudinal sectional front view and an AA cross-sectional view showing another embodiment of the drum in which the inner wall of the drum in the drum-type clothes dryer of the present invention is non-slip.

FIG. 17 is a longitudinal sectional front view and an AA sectional view showing still another embodiment of the drum in which the inner wall of the drum in the drum type clothes dryer of the present invention is provided with a non-slip surface.

FIG. 18 is a vertical sectional front view and an AA sectional view showing still another embodiment of the drum in which the inner wall of the drum in the drum-type clothes dryer of the present invention is non-slip.

FIG. 19 is a time chart showing a modification of the drying operation control process shown in FIG. 11;

[Explanation of symbols]

3 ... drum, 4 ... motor, 4-3 ... one-way clutch, 5-1 and 5-2 ... heater, 6 ... heat exchange fan, 1
8: control device, 18-1: operation panel, 18-3: microcomputer, 18-4: drive circuit.

Continuing from the front page (72) Inventor Kenichi Ogoshi 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside the Electrification Equipment Division of Hitachi, Ltd. No.Electrical Equipment Division, Hitachi, Ltd.

Claims (14)

[Claims] 1. A drum for accommodating clothes, a heater and a blower fan for supplying warm air into the drum, a rotation drive device for rotating the drum and the blower fan, and controlling the heater and the rotation drive device. In the drum-type clothes dryer provided with a control device, the control device stores the drum in the drum by rotating the fan and supplying warm air into the drum while the drum is stopped. A drum-type clothes dryer characterized in that a main drying control for drying dried clothes in a stationary state and a finish drying control for drying the clothes while rotating the drum at the end of drying thereafter to dry the clothes are performed. 2. The rotary driving device according to claim 1,
A drum rotational force transmission system that transmits the rotational force of the motor to the drum by a drum drive pulley attached to the motor shaft via a one-way clutch, and a blower fan drive pulley directly attached to the motor shaft to the blower fan The control device includes a fan rotational force transmission system that transmits the rotational force of the motor, the control device rotates the motor in a direction in which the one-way clutch idles in main drying control, and the rotational force of the motor in finish drying control. A drum-type clothes dryer characterized by performing control to rotate the motor in a direction transmitted to the drum via a one-way clutch. 3. The one-way clutch according to claim 2, wherein the one-way clutch is configured to transmit a rotational force when the motor rotates in a forward rotation direction to a drum, and the blower fan is driven by the forward rotation of the motor. A drum-type clothes dryer characterized by having a high air-blowing efficiency when being operated. 4. The motor according to claim 1, wherein the motor is a reversible rotation type condenser motor configured such that a generated torque in a forward rotation direction is larger than that in a reverse rotation direction. Drum type clothes dryer. 5. The motor control device according to claim 4, wherein in controlling the speed of the motor, the control device performs a constant speed rotation control when rotating the motor in the forward rotation direction, and performs no rotation speed control when rotating the motor in the reverse rotation direction. A drum type clothes dryer characterized in that it is made to do. 6. A drum-type clothes dryer according to claim 1, wherein the finish drying control is performed by rotating the drum for a short time a plurality of times. 7. A drum-type clothes dryer according to claim 1, wherein clothes are prevented from slipping on an inner wall of said drum. 8. A clothes dryer according to claim 7, wherein said non-slip is formed on a buffer sheet provided on an inner wall of the drum. 9. A drum-type clothes dryer according to claim 7, wherein said non-slip is formed on the entire circumference of the inner wall of the drum. 10. A drum type clothes dryer according to claim 7, wherein said non-slip is formed in a region of １ ／ to １ ／ of the entire circumference of the inner wall of the drum. 11. A drum-type garment according to claim 7, wherein said non-slip is formed to have a coefficient of friction of at least 1 with a JIS test cloth for drying performance in a dry state. Dryer. 12. A drum-type clothes dryer according to claim 1, wherein a blowing operation for lowering the temperature after the finish drying is performed while the drum is stopped. 13. A drum-type clothes dryer wherein a drying operation is performed in which power supply control to the heater with an average power consumption of 500 W or less is performed in a state where the drum is stopped in the entire drying step. 14. A clothes dryer according to claim 13, wherein power supply to said heater is intermittently controlled.