JPH067593A - Drum type clothes drier - Google Patents

Abstract

PURPOSE:To provide a drum type clothes drier which enables the drying of delicate clothes without impairing the texture thereof. CONSTITUTION:A heater 11 is divided into two and arranged both at high and low positions (11a and 11b) in a duct 10 to be controlled independently. When the temperature detected with a thermistor 13 exceeds a fixed value, one of the heaters 11a and 11b is turned OFF. In a standard drying course, a drum 1 is rotated forward continuously or the normal and reverse rotations are repeated alternately. At this point, the heater 11 for drying gets a full input. In a delicate drying course, the drum 1 is rotated reversely for 10sec. and then stopped. This operation is repeated. At the same time, the heater 11 for drying gets the full input. When the drum 1 is stopped, the heat 11b at the high position is turned OFF.

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 dehumidification type drum having a rotatable drum for storing clothes and a double-bladed fan for both a blower and a heat exchanger. The present invention relates to a dry clothes dryer, and relates to a structure for reducing damage to clothes when delicately drying.

[0002]

2. Description of the Related Art Generally, when clothes are dried by a drum type clothes dryer, if the clothes are lifted by the rotation of the drum and the clothes are dropped due to their own weight (tumbling) for a long time, the clothes are damaged. It tends to occur. In order to deal with this problem, conventionally, a method of reducing the mechanical force applied to the clothes during tumbling has been considered by stopping the rotation of the drum for a certain period of time during the drying operation.

That is, conventionally, there has been proposed a method in which the drum is dried by alternately rotating and stopping the rotation of the drum at regular intervals regardless of the humidity and temperature in the drum. Thus, as an example of performing intermittent rotation of the drum temporally and controlling the intermittent rotation, there is one disclosed in Japanese Patent Publication No. 63-78. Further, examples of the purpose of reducing the damage to the cloth include those disclosed in JP-A-63-95100. There, a method has been proposed in which the drum rotates when the temperature inside the drum exceeds a predetermined value, and stops when the temperature drops by a certain value.

[0004]

In the clothes dryer disclosed in Japanese Examined Patent Publication No. 63-78, a method of intermittently rotating the drum is proposed. However, this clothes dryer is intended for uniform irradiation of a germicidal lamp provided for drying clothes, and there is a method of reducing the mechanical force by tumbling to prevent damage to the cloth and the temperature inside the drum. Has not been sufficiently examined.

On the other hand, in the clothes dryer disclosed in Japanese Patent Laid-Open No. 63-95100, improvement is added so that the drum rotation is intermittently controlled in order to reduce the damage to the cloth. However, since there is no control such as input switching of the drying heater, the temperature in the drum rises quickly when drying a small amount of clothes. Then, the time difference between the rotation and the stop of the drum becomes small, and the effect of reducing the cloth damage is small.

As described above, although studies have been conducted so far to reduce the cloth damage of clothing due to intermittent tumbling, delicate clothes such as fashionable clothing of synthetic fibers, wool sweaters, silk blouses, etc. It has been difficult to dry clothes (sometimes requiring special care) without impairing their texture.

In particular, these delicate garments are rarely mixed with cotton underwear and dried, and are often dried alone, so that the mechanical impact exerted on the garment by the drop impact during tumbling. Power increases. And
When the drum stop time is short, the effect of intermittent tumbling is difficult to obtain, and problems such as poor contact between warm air and clothes become apparent.

[0008]

According to the present invention, a rotatable drum for storing clothes to be dried, a fan having functions of circulating hot air and cooling and dehumidifying, and a drum and a fan are independent of each other. In a drum-type clothes dryer including a driving device that drives the drum, a reversing device that rotates the drum in both forward and reverse directions, and a duct that serves as a path for circulating warm air, a plurality of drying heaters are provided in the duct. It is installed in both high and low positions, and during the dry tumbling operation, the drum is intermittently rotated for a predetermined time, and the heaters in the low position are input to about half of the total heat capacity of all the heaters. It is a drum type clothes dryer characterized by having an ON-controlled intermittent tumbling course.

That is, according to the drum type clothes dryer of the present invention, a plurality of clothes drying heaters are arranged at both high and low positions, and the drum is rotated in order to stably reduce the mechanical force applied to the clothes by tumbling. Set and control the predetermined rotation time and stop time in order to alternately perform the stop and the stop, and turn on only the heater (lower half) arranged at a low position when the rotation of the drum is stopped. The purpose of this control is to reduce the hot air that does not come into contact with the clothes and to prevent the temperature in the drum from rising rapidly.

When a small amount of delicate clothes are dried by the drum type clothes dryer of the present invention, it is preferable to control the rotation time of the drum so as to be one fifth or less of the stop time.

In the case of a small amount of drying during intermittent tumbling, the contact between warm air and clothes deteriorates and the drying efficiency decreases. Therefore, rotate the drum in the opposite direction so that the clothes fall in front of the drying heater. It is preferable to control it.

Further, since the drying time becomes long when the amount of delicate clothes to be dried becomes slightly large, it is controlled so that all the drying heaters are input only while the drum is rotating. Is preferred.

According to the drum type clothes dryer of the present invention, in order to prevent the occurrence of wrinkles of clothes at the end of drying, when the temperature inside the drum exceeds a predetermined value at the end of drying, the drum continues in the forward direction. It is preferably controlled to rotate.

[0014]

When the drum is rotated and stopped alternately, the rotation time of the drum during the drying operation is shortened. Therefore, the mechanical force due to tumbling is greatly reduced, and the cloth is less damaged. As a result, the delicate clothes, which have been difficult to dry by the conventional drum type clothes dryer, can be dried well.

By controlling the heater which is turned on among the plurality of drying heaters, the rapid temperature rise in the drum is eliminated, and the damage of the cloth due to the high temperature can be prevented.

In the case of a small amount of drying, by rotating the drum in the reverse direction and controlling the clothes to drop in front of the heater inside the drum when the drum is stopped, good contact between the clothes and warm air can be maintained.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail below with reference to the drawings. The present invention is not limited to this.

FIG. 1 shows a sectional structure of a drum type clothes dryer according to the present invention. The drum 1 for storing clothes to be dried has a drum shaft 4 whose one (rear) side is horizontal.
Is rotatably supported by and the opposite (front) side is rotatably supported by the support plate 3. A yarn waste filter 6 and a filter guard 5 are provided on the rear side wall surface of the drum 1 before the exhaust port 7. 1
A tumbling drum baffle 7 is attached and fixed to the inner surface of the peripheral wall of the drum 1.

Behind the drum 1, a double-blade fan 8 which also functions as a blower for circulating hot air and a heat exchanger for cooling and dehumidifying is rotatably provided on a horizontal drum shaft 4. The drum 1 can be rotated in both forward and reverse directions by a drum driving motor 19 via a drum belt 16. On the other hand, the both-wing fan 8 is rotated independently of the drum 1 by the fan driving motor 18 via the fan belt 15.

Reference numeral 10 is a duct for circulating hot air. 11 is a heater for drying clothes provided in the duct 10.
Generally, a PTC (semiconductor) heater is used. As shown by the broken line in FIG. 2, the heater 11 is divided into two parts (11a and 11b) of a high position and a low position. The heaters 11a and 11b are controlled independently.

Reference numeral 2 is a hot air outlet provided in the support plate 3. Reference numeral 12 is a drain port provided at the lowest position of the duct 10. Both 13 and 14 are thermistors provided in the warm air circulation path. That is, the thermistor 1
3 is behind the exhaust port 7, and the thermistor 14 is 11a.11.
They are provided in front of b. These thermistors 13 and 14 are used for detection of completion of drying, detection of abnormal temperature rise, and the like. Reference numeral 21 denotes a thermistor attached near the suction side on the cooling side of the double-blade fan 8, and detects the outside air temperature such as the room temperature of the room in which the drum type clothes dryer is installed.

The operation of this drum type clothes dryer will be described below. When the double-blade fan 8 rotates, the air is indicated by arrow A.
Flowing in the direction of. That is, the air flows through the duct 10 from the rear side to the front side, is heated by the heater 11 to become warm air, and is blown into the drum 1 through the warm air blowing holes 2. The warm air blown into the drum 1 comes into contact with the clothes inside, and in a state containing a large amount of water, the yarn waste filter 6 and the exhaust port 7
And then return to the both-wing fan 8 again.

On the opposite side (rear side) of the double-blade fan 8, as shown by an arrow B, cold outside air is taken into the machine and discharged to the outside of the machine to flow in the direction A. Dehumidify by cooling hot and humid hot air. The water condensed at this time is drain port 12 at the bottom of duct 10.
Is discharged from the aircraft.

On the other hand, the drum 1 has a low speed (40 to 60 rp).
Rotate in m). Then, the cycle (tumbling) is repeated in which the clothes are lifted upward by the centrifugal force generated by the rotation of the drum 1 and the action of the drum baffle 17 and fall by their own weight. This keeps the clothes in good contact with the warm air. By repeating the above, the clothes in the drum 1 are dried.

Two thermistors 13 for detecting warm air temperature
When the temperature difference of 14 becomes equal to or more than the set value, it is determined that the drying is completed, and the operation is controlled to stop. Further, when the temperature detected by the thermistor 13 exceeds a certain value, it is determined that the temperature inside the drum 1 is too high, and the heater 11a.
It is also controlled so that any one of 1b is cut to lower the temperature inside the drum 1.

Next, the control of the drum 1 and the drying heater 11 will be described. In the standard drying (non-delicate drying) course, the drum 1 is either continuously rotated in the forward direction (clockwise direction in FIG. 2) or alternately rotated in the forward and reverse directions. Controlled. At this time, the drying heater 11 is basically controlled so as to receive all inputs. However, with the heater changeover switch, "weak"
When is selected, either of the heaters 11a and 11b is controlled to be turned on.

On the other hand, when the delicate drying course is selected, as shown in FIG. 3, the drum 1 and the drying heater 11 are used.
It is controlled according to the timing chart of. That is, the drum 1 rotates in the opposite direction for 10 seconds, then stops for 300 seconds,
Then, it is controlled to repeat the operation of rotating for 10 seconds in the same direction. At the same time, all inputs are input to the drying heater 11. When the drum 1 stops, the heater 11 in the low position
Only the heater a in the high position holds the ON state.
Turns off. When the drum 1 rotates again, the heater 11b in the high position is controlled to be turned on. During this time, the both-wing fan 8 is continuously rotating.

When the diameter of the drum 1 is about 600 mm and the rotation number of the drum 1 is set to 45 to 68 rpm, the clothes are tumbled so as to fall near the heater 11a as shown in FIG. In the stopped condition, warm air will hit the clothes well. Therefore, it is possible to prevent a decrease in the drying efficiency that occurs when the warm air is discharged without coming into contact with the clothes and a sensing failure due to a sharp rise in the temperature of the warm air discharged from the drum 1. Also,
When the temperature detected by the thermistor 13 exceeds the set value at the end of drying, the rotation of the drum 1 may be continuously rotated in the forward direction to prevent the occurrence of wrinkles in the clothes at the end of drying.

In the delicate drying course, the rotation time of the drum 1 during the drying operation is shorter than that in the standard drying course, so that the mechanical force applied to the clothes is greatly reduced and the damage to the cloth is significantly reduced. In the evaluation test using 100% wool sweater, the shrinkage ratio of the sweater in the delicate drying course is 15% or less, compared to 35% or more in the standard drying course, when compared in shrinkage ratio. This is hand wash
It is the same value as in the case of shade drying. From this evaluation test, it can be seen that this drum type clothes dryer can dry delicate clothes such as fashionable clothes of synthetic fibers, wool sweaters, silk blouses, etc. without impairing the texture. .

Further, by controlling the input of the drying heater 11, an abnormal temperature rise of the clothes can be suppressed, and the clothes can be prevented from being damaged by high temperature hot air. Further, the contact between the warm air and the clothes is good and waste is eliminated, so that good drying can be performed without lowering the drying efficiency.
In addition, since the drum 1 is controlled to rotate continuously at the end of drying, it is possible to prevent wrinkles from occurring at the end of drying.

[0031]

According to the drum type clothes dryer of the present invention,
It is possible to dry delicate clothing such as fashionable synthetic clothes, wool sweaters, silk blouses, etc. without impairing the texture.

[Brief description of drawings]

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

FIG. 2 is an internal configuration explanatory diagram of the drum as seen from the front of the drum type clothes dryer.

FIG. 3 is a timing chart showing an example of a method of controlling a drum and a heater for drying in the drum type clothes dryer.

[Explanation of symbols]

 1 Drum 4 Drum Shaft 8 Double-Wing Fan 10 Duct 11 (11a ・ 11b) Drying Heater 17 Drum Baffle 18 Fan Drive Motor 19 Drum Drive Motor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Noriaki Miyoshi, 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Prefecture (72) Inventor Yuji Onishi, 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Prefecture

Claims (5)

[Claims] 1. A rotatable drum for storing clothes to be dried, a fan having functions of circulating hot air and cooling and dehumidifying, and a drive device for independently driving the drum and the fan. In a drum-type clothes dryer equipped with a reversing device that rotates the drum in both forward and reverse directions and a duct that serves as a path for circulating warm air, a plurality of drying heaters are installed in both high and low positions in the duct. During the dry tumbling operation, the drum is intermittently rotated for a predetermined time, and the heater in the low position is ON-controlled so that the input of the heater is about half of the total heat capacity of all the heaters. A drum-type clothes dryer having: 2. The drum type clothes dryer according to claim 1, wherein the rotation time of the drum in the intermittent tumbling course is controlled to be one fifth or less of the stop time. 3. The drum type clothes dryer according to claim 1, wherein the drum is controlled so as to rotate in a reverse direction in the intermittent tumbling course. 4. A plurality of heaters for drying are provided in a two-divided shape, and all the heaters are controlled to be turned on during rotation of the drum in the intermittent tumbling course.
The described drum type clothes dryer. 5. The drum type clothes dryer according to claim 1, wherein when the temperature inside the drum exceeds a predetermined value, the drum is controlled so as to continuously rotate in the forward direction.