JP2943336B2 - 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 clothes dryer used in ordinary households.

[0002]

2. Description of the Related Art A conventional clothes dryer of this type has the structure shown in FIG. In the drawing, reference numeral 1 denotes an outer frame of a dryer, 2 denotes a drum rotatably supported in the outer frame 1, and 3 denotes a fan for blowing drying air. 4 is drum 2 and fan 3
And the hot air a heated by the heat source 5
In this case, the drying air that has exchanged heat with the clothes in the drum 2 and has taken moisture from the clothes is blown out of the drum 2. Also, as shown in FIG. 6, when the drum 2 rotates in the direction of the arrow b, the clothing 6 moves as shown by the arrow c. In order to finish the drying in a short time, the hot air supply unit 7 is provided at a position where the hot air directly hits the rolling clothes, that is, is displaced in the normal rotation direction with respect to the vertical direction of the rotation center of the drum. The drum 2 rotates in one direction.

[0003]

However, in the above configuration, the warm air constantly hits the clothes until the drying is completed.

[0004] In the first half of the drying process, when the garment has a lot of moisture, the surface temperature of the garment does not rise because heat energy is used for evaporation. However, when the moisture contained in the clothes decreases and the thermal energy is supplied, the surface temperature of the clothes tends to increase. Therefore, depending on the material of the garment, there has been a problem that the surface temperature of the garment rises and the garment is damaged, thereby being adversely affected by heat.

The present invention has been made in view of the above problems, and provides a clothes dryer capable of reducing damage caused by a rise in the surface temperature of clothes without lowering drying efficiency or extending drying time.

[0006]

In order to achieve the above object, a clothes dryer according to the present invention comprises: a drying rate detecting section that detects that a drying rate of clothing has reached a predetermined value; The control device reverses the drum from the normal rotation state.

[0007]

According to the above construction, the drum rotates forward in the first half of the drying step in which the garment has a lot of moisture, so that the garment is
Since the front surface of the hot air supply unit is located at the position where the hot air directly hits, the moisture contained in the clothes is efficiently vaporized. Then, in the latter half of the drying step, in which the clothes have little moisture and the surface temperature of the clothes tends to rise, the drum is inverted, so that the clothes are located away from the hot air supply unit and in direct contact with the hot air. In addition, the rise in the surface temperature of the clothing can be suppressed. Therefore, it is possible to reduce the damage caused by the increase in the surface temperature of the clothes without lowering the drying efficiency or increasing the drying time.

[0008]

Embodiments of the present invention will be described below.

In FIG. 1, reference numeral 8 denotes a machine body which rotatably supports a drum 9 for inserting and rotating and stirring clothes, 10 denotes a clothes inlet provided on the front of the machine body 8, and 11 denotes a drum inside. It is a heat source for introducing warm air into the air. The hot air supply unit 12 that supplies the hot air into the drum 9 has a position where the hot air directly hits the rolling clothes when the drum 9 rotates in the normal rotation direction, that is, the d direction shown in FIG. The drum 9 is provided so as to be deviated in the forward direction with respect to the vertical direction of the rotation center of the drum 9. A blower fan 13 is driven to rotate by a fan motor 14, and the drum 9 is driven to rotate by a motor 15 via a belt 16. The heat source 11, the fan motor 14, and the motor 16 are controlled by the control device 17. Further, the control device 17 has a thermistor 18a, 1 for measuring the temperature of the drying air.
8b and the like. As an example of a configuration for inverting the drum, two idler pulleys 19 and 20 are provided so as to apply tension A in both directions of the drum belt 19 as shown in FIG.

Next, the operation of the above configuration will be described. First, the clothes 6 are put into the drum 9 and drying is started. In the first half of the drying step, the drum rotates in the direction of arrow d shown in FIG.
The clothing 6 moves as indicated by an arrow e. The hot air hits the clothing directly, but the thermal energy is used for evaporation, so the surface temperature of the clothing does not rise during this time.

When the drying proceeds and the moisture contained in the clothes decreases and reaches a predetermined drying rate, the drying rate is detected by the drying rate detecting means 18, and the control unit 17 controls the motor 15, whereby the drum is controlled. Is inverted. The drum rotates in the direction of arrow f shown in FIG. 3, and the garment 6 moves as indicated by arrow g. Clothes are located away from the hot air supply section, and rolled and dried in places where hot air does not directly hit,
The rise in the surface temperature of clothing can be suppressed. After that, the drying end detecting unit 18 detects the end of the drying,
Finish the drying.

The drying efficiency and the drying time at this time are the same as those of the prior art. The drying efficiency and the drying time are substantially determined in the first half of the drying step, which is called a constant rate drying step and has a high drying rate. In the present invention, as shown in FIG. 2, in the first half of the drying step, the drum rotates in the normal direction so that the warm air is directly blown on the clothes, so that the moisture contained in the clothes can be efficiently vaporized. Will be

The latter half of the drying step is called a decreasing rate drying step.
Since the drying speed is very low, this step has little effect on the drying efficiency or the drying time.

Therefore, the overall drying efficiency and drying time have the same performance as the conventional one. As described above, according to the present invention, it is possible to provide a clothes dryer capable of reducing damage due to a rise in the surface temperature of clothes without reducing drying efficiency or extending drying time.

In the present embodiment, the drying rate is detected by two thermistors. However, it is also possible to detect the enlargement value of clothing by an electrode, in other words, it is sufficient that the drying rate can be detected.

[0016]

As is apparent from the above embodiment, according to the present invention, the drum rotates forward in the first half of the drying step in which the garment has a large amount of moisture, so that the garment is connected to the hot air supply section. Since the warm air on the front side is directly hit, the moisture contained in the clothes is vaporized efficiently. Then, in the latter half of the drying step, in which the clothes have little moisture and the surface temperature of the clothes tends to rise, the drum is inverted, so that the clothes are located away from the hot air supply unit and in direct contact with the hot air. In addition, the rise in the surface temperature of the clothing can be suppressed. Therefore,
Without decreasing the drying efficiency or increasing the drying time,
Damage due to an increase in the surface temperature of clothing can be reduced.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a clothes dryer showing one embodiment of the present invention.

FIG. 2 is a diagram illustrating a position of a hot air supply unit of the dryer and a rolling state of clothes during normal rotation of a drum.

FIG. 3 is a diagram showing a position of a hot air supply unit of the dryer and a state of rolling of clothes when the drum is inverted.

FIG. 4 is a diagram showing a configuration in which a drum of the dryer is inverted.

FIG. 5 is a longitudinal sectional view of a conventional clothes dryer.

FIG. 6 is a diagram showing a position of a hot air supply unit of a conventional clothes dryer and a rolling state of clothes when the drum rotates.

[Explanation of symbols]

 9 Drum 11 Heat source 12 Hot air supply unit 13 Fan 15 Motor 17 Controller 18 Drying rate detecting means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-222009 (JP, A) JP-A-53-166168 (JP, U) JP-A-56-122495 (JP, U) (58) Investigation Field (Int.Cl. ⁶ , DB name) D06F 58/02-58/28

Claims (1)

(57) [Claims] 1. A rotatable drum for rolling clothes, a heat source and a fan for supplying warm air into the drum, a motor for driving the drum, and a control device for controlling a rotation direction of the drum. a drying rate detecting means for detecting the drying rate of the clothing, subjected to hot air of the heat source and the fan in the drum
A hot-air supply unit for supplying the hot-air supply unit, wherein the hot-air supply unit is provided so as to be deviated in a forward rotation direction with respect to a vertical direction of a rotation center of the drum, A clothes dryer configured to reverse the drum from a normal rotation state after a point in time when it is detected that the drum has reached a predetermined value.