JPH05245294A - Drum type clothing drier - Google Patents

Abstract

PURPOSE:To shorten the drying period of a dried object and prevent fabric damage at no cost with an inexpensive means in a drum type clothing drier. CONSTITUTION:A drum type clothing drier is controlled to reversely rotate a double-vane fan 2 until the temperature in a rotary drum 1 reaches the preset temperature in the early stage of the drying operation and to positively rotate the double-vane fan 2 after the temperature in the rotary drum 1 reaches the preset temperature. An opening angle is reversely provided from a position 17C at about 1/6 or above of the outer periphery length between the opening angle start point 17A and the end point 17B of the outer periphery wall 18 of the double-vane fan 2 in the casing 17 of the double-vane fan 2 toward the opening angle start point 17A at the time of positive rotation, and an opening angle peripheral wall 18A and the wall 18B of the blowout port of the casing 17 are connected with a smooth curved surface R.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a drum type clothes dryer.

[0002]

2. Description of the Related Art Conventionally, the one shown in FIG. 4 is known as this type. This drum type clothes dryer includes a rotary drum 1 for storing a material to be dried, a double-blade fan 2 having both internal circulation and cooling, a drive unit 3 for driving the rotary drum 1 and the double-blade fan 2, and a heat source for drying. A certain semiconductor heater 4
The air heated by the semiconductor heater 4 comes into contact with the material to be dried,
The air that has been heat-exchanged and dehumidified by the double-blade fan 2 is sent to the semiconductor heater 4 through the duct 5 and heated, and is dried by repeating this.

In the above clothes dryer, the rotary drum 1
In the case where the single-motor 3 rotates the two-blade fan 2 and the two-blade fan 2, the two-blade fan 2 is used only within the set time at the beginning of the drying operation.
There is one that rotates in reverse.

However, this is a means for reducing the air volume of the circulating air in the refrigerator by reversing the two-blade fan 2 and relaxing the rush current of the heater input.

Further, in the case of rotating the rotary drum 1 and the both-wing fan 2 by separate motors, in the case of large clothes or clothes which are easily entangled, if the rotary drum 1 rotates only in one direction, the clothes will be entangled. In order to solve the problem that the clothes cannot be dried efficiently, the rotary drum 1 is rotated in the forward or reverse direction to prevent the clothes from being entangled and to efficiently dry the clothes. However, the double-blade fan 2 is rotating normally until the end of drying.

However, there is a type in which the two-blade fan 2 is rotated in the reverse direction at the initial stage of drying, but this aims at the same effect as that using the one motor 3 described above.

The fan casing 6 of the double-bladed fan 2
5 is formed for normal rotation (direction of arrow C) as shown in FIG. 5, so that the angle between the opening angle starting point 6A and the opening angle end point 6B of the casing 6 is open to the two-blade fan 2.

Therefore, the corner wall R with the outlet wall 7 at the opening angle starting point 6A is small.

[0009]

In the conventional drum type clothes dryer having the above-mentioned former one, that is, having only one motor, the heater input is lowered and the temperature rise in the refrigerator is bad. As a result, the drying time was long and it was a cause of fabric damage.

In the latter case, that is, in the case of having two motors, the shape of the fan casing is the most efficient shape at the time of forward rotation as shown in FIG. If it is rotated in the reverse direction, the air volume will be significantly reduced and the required air volume cannot be secured.Therefore, the heater input will be reduced and the temperature rise in the refrigerator will be worse as in the former case, resulting in a longer drying time and damage to the cloth. It was also the cause of

[0011]

As a means for solving the above-mentioned problems, the present invention independently provides a rotary drum for accommodating a material to be dried and a double-blade fan having both hot air circulation and cooling / dehumidifying in the refrigerator. And a reversing means for rotating the rotary drum and the double-blade fan in two directions, forward and reverse, a semiconductor heater as a heat source for drying, and a circulation cooled by the double-blade fan. In a drum type clothes dryer having a duct serving as a hot air path, the two-blade fan is rotated in the reverse direction until the temperature of the circulating hot air in the refrigerator is detected by the temperature detecting means at the initial stage of the drying operation, and the temperature detecting means is used. Is provided with operation control means for rotating the double-blade fan in the forward direction when it detects a predetermined temperature, and the fan casing of the double-blade fan is sucked around one end of the double-blade fan about the axis. An opening is provided in the outer peripheral wall of the double-blade fan, and the opening angle at the time of forward rotation starts from a position about 1/6 or more from the opening angle starting point to the end point of the outer peripheral wall from the opening angle starting point to the end point. The drum type clothes dryer is characterized in that an opening angle is provided in the opposite direction, and the peripheral wall of the opening angle and the peripheral wall of the outlet are connected by a gently curved wall.

[0012]

By the above means, it is possible to suppress the decrease in the temperature of the circulating hot air during the initial operation. Further, the internal temperature can reach the predetermined temperature quickly.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a schematic vertical cross-sectional view of a drum type clothes dryer showing an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line X--X in FIG. 1, and FIG. is there. In addition, the same reference numerals will be given to the same or equivalent portions as in the conventional example.

The rotary drum 1 for accommodating the clothes for drying is rotatably supported by the drum shaft 8 and, on the other hand, rotatably supported by the support plate 3.

On the side surface of the rotary drum 1, a lint filter 10 and a filter guard 11 are provided in front of the exhaust port 9. Reference numeral 12 is a drum baffle fixed to the inner peripheral surface of the rotary drum 1, and its cross section is symmetrical so that the tumbling conditions for forward rotation and reverse rotation are equal.

Reference numeral 2 denotes a double-blade fan, which is rotated independently of the rotary drum 1 by a drive motor 14 via a fan belt 13. Reference numeral 15 is a drive motor for rotating the rotary drum 1, and the rotary drum 1 is provided via a drum belt 16.
To rotate.

Reference numeral 17 denotes a fan casing, which has both a circulation side in the refrigerator and a cooling side. The shape of the circulation side is shown in FIG. Opening angle start point 17A for the outer circumference 18 length from the point 17A) to the end point (point 17B)
From about 1/6 or more in the counterclockwise direction (point 17C) to the opening angle starting point 17A during the previous forward rotation, the circulation path 24 is formed with an opening angle in the opposite direction, and the opening angle starting point 17
The outer circumference 18A of A and the outlet wall 18B are connected to each other with a gentle curved surface R.

The double-blade fan 2 is controlled so as to rotate in the reverse direction until the temperature inside the refrigerator at the initial stage of the drying operation reaches a predetermined temperature. Then, when the internal temperature reaches a predetermined temperature, the double-blade fan 2 is inverted and is controlled to drive in the normal rotation.

Reference numeral 19 is a semiconductor heater, and 19 is a discharge port provided in the support plate 20. Reference numerals 21 and 22 are thermistors provided in the hot air circulation path 21 and are used as a dry end detecting means or the like. Reference numeral 23 is a drain port for draining dehumidified water.

Next, the operation of the above-described drum type clothes dryer of the present invention will be described.

When the material to be dried is put into the rotary drum 1 and the operation is started, the semiconductor heater 4, the double-blade fan drive motor 14 and the rotary drum drive motor 15 are energized. At this time, the rotary drum 1 carries out repeated operation control of forward rotation → stop → reverse rotation → stop → forward rotation in order to prevent kinking and entanglement of the material to be dried.

Further, since the double-blade fan 2 is rotated in the reverse direction at the initial stage of drying until the temperature inside the storage reaches a predetermined temperature (direction D in the arrow in FIG. 2), the air volume on the cooling side is reduced and the storage is reduced. It is possible to warm the inside of the refrigerator and the material to be dried by blowing hot air into it, and since the air volume on the cooling side is smaller than the circulating air volume, it is possible to minimize the cooling of hot air. be able to.

When the temperature inside the chamber rises and reaches a predetermined temperature, the double-blade fan 2 reverses and rotates forward (direction C in FIG. 2), and the air volume on the cooling side balances with the air volume on the circulation side in the chamber. And the material to be dried is dried.

When the circulating temperature and humidity in the refrigerator reach predetermined values, the thermistors 21 and 22 detect that the drying is completed, and the operation is stopped.

When the drying time of the present invention and the conventional drum type clothes dryer are compared, the results are shown in the table below, and the time can be shortened by 15 minutes.

[0026]

[Table 1]

In the above table, the amount of material to be dried is 5 kg.

In the above embodiment, the rotary drum 1 is rotated in the forward and reverse directions, but the present invention is possible even in the case of unidirectional operation in the forward rotation. Further, although the drive motor is provided independently of the rotary drum 1 and the double-blade fan 2, a drive motor that switches the drive of the rotary drum 1 and the double-blade fan 2 by means such as a gear or a clutch can be used. Fan casing 1
The object of the present invention can be achieved by making the circulation side of 7 a structure capable of ensuring a constant air volume during normal rotation and reverse rotation.

Further, the heater used is not limited to the semiconductor heater 4, and the same effect can be obtained with any heater. Regarding the shape of the circulation side of the fan casing 17, the opening angle is symmetrical with respect to the left and right. Yes, it is possible.

[0030]

Since the present invention is constructed as described above, it has the following effects. By rotating the double-blade fan in the reverse direction at the initial stage of drying, the temperature inside the circulating hot air during the initial operation can be suppressed and the internal temperature of the chamber can quickly reach the specified temperature. It can also prevent damage.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a diagram similarly showing a temperature rise during a drying operation.

FIG. 4 is a schematic vertical sectional view of a conventional drum type clothes dryer.

5 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 Rotating Drum 2 Double-Wing Fan 11 Semiconductor Heater 14 Double-Wing Fan Drive Motor 15 Rotating Drum Drive Motor 17 Fan Casing 17A Opening Angle Starting Point 17B Opening Angle Ending Point 24 Circulation Path

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Koji Yamane 22-22 Nagaike-cho, Abeno-ku, Osaka, Osaka Incorporated (72) Inventor Kazutoshi Hyakki 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Prefecture

Claims (1)

[Claims] 1. A rotary drum for accommodating a material to be dried, and a drive device capable of independently driving a double-blade fan having both circulation of hot air in the chamber and cooling / dehumidification, and the rotary drum and the double-blade fan are both forward and reverse. Drum type clothes dryer having a reversing mechanism capable of rotating in two directions, a semiconductor heater having a positive characteristic as a heat source for drying, and a duct serving as a path for circulating hot air cooled by the double-blade fan. In the above, a temperature detecting means for detecting the temperature in the rotary drum is provided, and during the initial drying operation, the double-blade fan is rotated in a direction opposite to the normal rotation until the temperature detecting means detects a predetermined temperature, When the temperature detecting means detects a predetermined temperature, a control means for rotating the double-blade fan in a regular rotation direction is provided, and the fan casing circulation shape for normal rotation of the double-blade fan is changed to a fan casing. With respect to the outer peripheral length from the opening angle start point to the end point of the sing, the peripheral wall is formed from the opening angle start point to the opening angle start point at the time of forward rotation from the predetermined position, and conversely forms the peripheral wall with the opening angle, and the peripheral wall and the peripheral wall of the outlet. A drum-type clothes dryer characterized by a series of gently curved surfaces.