JP3096398B2 - 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 drier that stores a drying object in a rotating drum that is driven to rotate around a horizontal axis, and that performs drying while blowing air with two flows of air.

[0002]

2. Description of the Related Art In conventional drying of a drying object (dry matter) such as clothes, a method of separating water from the drying object by only one air blow is widely known.

[0003]

However, with only one air flow, the moisture of the cloth to be dried does not evaporate until it is sufficiently saturated in the drum, and the unsaturated air is exhausted and dehumidified in the dehumidifying section. Therefore, the dehumidification efficiency was poor and the amount of dehumidification was small.

[0004] In view of the above, an object of the present invention is to provide a clothes dryer capable of drying efficiently. Further, it is another object of the present invention to provide a clothes dryer capable of drying efficiently according to the cloth quality and the amount of cloth to be dried.

[0005]

SUMMARY OF THE INVENTION A clothes dryer according to the present invention solves the above-mentioned problems, and the invention according to claim 1 comprises a rotatable interior of a main body for drying objects such as clothes. A rotating drum to be housed, a driving device for rotating the rotating drum, a blowing device for blowing drying air into the rotating drum, a ventilation passage for passing drying air, and a heating device for heating the drying air. In a clothes dryer in which a dehumidifying device for dehumidifying the drying air is provided, a ventilation path and a ventilation fan for taking out the air in the rotating drum, re-introducing the baffle into the rotating drum, and circulating the same are provided. While rotating, the object to be dried is dried by two flows of air for drying, which has been dehumidified and heated, and air for drying, which is blown out from an air duct (duct).

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, a means for detecting the amount of cloth to be dried is provided. The present invention according to claim 3 further comprises a means for setting the cloth quality of the object to be dried, in addition to the configuration of the invention according to claim 1, and performs drying with the set cloth quality. This is for variably controlling the amount of circulation air for promotion.

According to a fourth aspect of the present invention, in addition to the configuration of the first aspect, in the drying step of the object to be dried, the amount of circulating air for promoting drying is variably controlled depending on a drying progress time. In addition, the invention according to claim 5 further includes, in addition to the invention according to claim 1, means for detecting humidity in the rotating drum, and variably controls the amount of circulating air for promoting drying based on the detected humidity. It is.

[0008]

According to the present invention, there is provided a clothes dryer having the above-mentioned structure.
According to the invention described above, the object to be dried is dried by two air flows of drying air that has been dehumidified and heated and drying promotion air that is blown out of a duct while rotating a drum. Is quickly transmitted to the object to be dried, drying is accelerated, and the time required for drying can be shortened.

According to the second aspect of the present invention, it is possible to perform efficient drying in accordance with the amount of cloth by variably controlling the amount of circulation air for promoting drying based on the detected amount of cloth to be dried.
According to the third aspect of the present invention, by variably controlling the amount of circulating air for promoting drying in accordance with the set cloth quality of the object to be dried, efficient drying in accordance with the cloth amount can be performed and delicate cloth cloth can be obtained. Drying with little damage is possible.

According to the fourth aspect of the present invention, the object to be dried can be efficiently dried and the drying time can be shortened by variably controlling the amount of circulation air for promoting drying according to the drying progress time. Claim 5
The described invention variably controls the amount of circulating air for promoting drying in accordance with the detected humidity, thereby enabling efficient drying in accordance with the evaporation of water in the rotating drum.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a clothes dryer according to the present invention will be described below with reference to the drawings. The clothes dryer of the present invention is configured as shown in FIG. 1. In FIG. 1, a rotating drum 2 having a plurality of baffles 9 rotatably mounted around a horizontal axis is provided. 2 is rotatably supported by a drum shaft, a filter cover and a filter 21 are provided on this surface, and an exhaust port 22 is formed on a side wall of the rotary drum 2 opposed to the filter cover and the filter 21. A fan case 25 is provided outside of the fan 22. The fan case 25 is combined with the double-blade fan 7 also serving as a dehumidifying heat exchanger to constitute a blower. A ring felt 28 is attached to the fan case 25, and the rotary drum 2 is slid. It has a structure to seal while.

The two-wing fan 7 is rotated by a motor 3 via a fan belt 4, and the rotating drum 2 is rotated by a motor 3 via a drum belt 8. Duct heater 13, rotating drum 2, filter cover, filter 2
1. Circulated in the path of the exhaust port 22 to heat the clothes of the rotating drum 2 and evaporate the moisture.

On the other hand, the two-blade fan 7 is always cooled by the outside air by taking in and discharging the outside air on the surface on the side opposite to the rotating drum 2, and has the humidity including the water vapor coming from the exhaust port 22 of the rotating drum 2. The high air is cooled by touching the heat exchanging section, and water vapor exceeding the saturated water vapor pressure becomes water droplets, and is discharged from the drain port 26 provided at the lower part of the duct 12 to the outside of the device to be dehumidified. A part of the air that has passed through the filter 21 and the filter cover is circulated again in the rotating drum 2 by a blower for promoting drying and is blown out from the baffle 9.
By repeating the above, the clothes in the rotating drum are dried.

In the above configuration, the generated circulating wind for promoting drying is blown out from the baffle 9 and directly hits the object 24 to be dried. A commercially available dehumidification-type clothes dryer was improved by using an exhaust type to enable circulation ventilation for drying promotion. Room temperature 22 ° C, room relative humidity 32.
%, The amount of cloth is 2 kg, the amount of dry air passing through the heater through the two-wing fan is 2 m3 / min, and the amount of circulating air blown from the baffle 9 is 2 m3 / min.
A comparison experiment was conducted with and without drying circulation blast for drying to 7%, and when compared with the time for a drying place, when drying circulation blast was performed, drying promotion circulation blast was not performed. 8% time reduction was confirmed as compared with the case.

[0015] In addition, by varying the amount of circulating air for promoting drying in accordance with the cloth set by the user, the cloth for drying can be changed by using means that can be set by the user. Cloth damage can be reduced by reducing the amount of circulation air and making the amount of air air weaker.

The weight of the dried material is detected, and when the amount of the cloth is small, the circulating air for promoting drying can be increased to promote the evaporation. Since the evaporation of moisture is not actively performed in the inside, the amount of the circulation wind for promoting drying can be increased, and the evaporation can be promoted.

Further, when moisture evaporates in the rotary drum, the evaporation heat is taken away and the temperature in the rotary drum decreases. Therefore, when the temperature difference between the air temperature from the heating device and the rotary drum exhaust air temperature is large, the rotary drum It is determined that the evaporation of water in the inside is actively performed, and the amount of the circulation wind for promoting drying can be reduced.

One embodiment of the clothes dryer of the present invention will be described in more detail. As shown in FIG. 1, the clothes dryer of the present invention has a plurality of hot air outlets 16 in the dryer main body 1 as shown in FIG. Felt 18 attached around support plate 17 provided
A rotary drum 2 rotatably supported via a rotatable member for storing and rotating the dried material, the rotary drum 2 having a drying object input port 14 for taking in and out the dried material on a front surface thereof; A sealing lid 15 for opening and closing the input port 14 in the main body 1
Is attached to open and close freely.

The back surface of the rotary drum 2 is rotatably supported by a rotary drum projection and a ring felt 28,
A filter 21 is provided on this surface, and an exhaust port 22 is formed on a side wall of the rotating drum 2 opposed thereto.
A humidity sensor 5 and a temperature sensor 6 are provided between the exhaust port 22 and the filter 21, and a fan case 25 and a two-blade fan 7 serving also as a dehumidifying heat exchanger are combined outside the exhaust port 22 to provide a blower. A ring felt 28 is attached to the fan case 25 to seal the rotary drum 2 while sliding it.

The two-wing fan 7 is rotated by a motor 3 via a fan belt 4, and the rotary drum 2 is rotated by a motor 3 via a drum belt 8. Circulated through the duct heater 13, the rotating drum 2, the filter 21, and the exhaust port 22, the clothing of the rotating drum 2 is heated and moisture is evaporated.

On the other hand, the two-blade fan 7 is always cooled by the outside air by taking in and discharging the outside air on the surface on the side opposite to the rotary drum 2, and has a high humidity containing water vapor coming from the exhaust port 22 of the drum 2. The air is cooled by touching the two-wing fan 7, and water vapor exceeding the saturated water vapor pressure becomes water droplets, and is discharged from the clothes dryer main body 1 through a drain port 26 provided at a lower portion of the duct 12 to be dehumidified. You.

Next, the dehumidified air is guided by the duct 12 through the duct heater 13 into the rotary drum 2,
The duct heater 13 is composed of a sheathed heater and functions to reheat the air cooled by the dehumidifier. Further, a ventilation fan for promoting drying and circulation is provided above the exhaust port 22 outside the rotary drum 2 to facilitate drying and circulation. A drying promotion circulation outside drum 23 is provided at an exhaust port of the blower fan, and a drying promotion circulation circulation inside duct 20 slidably rotates through an oil ring 11 at an end thereof. The internal drying promotion circulation duct 20 has a baffle 9
It is connected to the.

A part of the air exhausted from the exhaust port 22 of the rotary drum 2 is sucked by the drying promotion circulation fan 10 and the drying promotion circulation duct 23 outside the drum.
The baffle 9 is passed through the drying promotion circulation duct 20 in the drum.
Is circulated again to the inside of the drum 2 for promoting drying, thereby promoting drying. By repeating the above operation, the clothes in the rotating drum 2 are dried.

The driving of the motor 3 is controlled by a control device 27 comprising a microcomputer. The control device 27 is arranged at the front of the dryer main body 1, and receives inputs from operation keys of an operation panel 26 provided on the outer surface of the dryer main body 1 and output signals of various sensors such as the temperature sensor 6 and the humidity sensor 5. The drying process is controlled according to an internal timer.

As shown in the block diagram of FIG. 2, the control device 27 is supplied with power from a power supply circuit 33 to a control circuit 32, and receives a temperature sensor 6, a humidity sensor 5, and an operation key 31 for setting cloth quality and the like. In response to the signal, the motor 3, the drying promotion circulation fan 10, and the duct heater 13 are controlled, and the controller 27 includes a cloth amount determining function for determining the weight of the object to be dried. It has an operation setting function and the like for setting each drying operation condition based on the determination result.

In the above configuration, when the object to be dried is put in and the drying is started, the initial weight of the object to be dried is detected by the cloth amount discriminating function, and the rotating drum 2, the two-wing fan 7, the drying fan 10 Then, the duct heater 13 is operated to start drying.

Here, as a method of determining the weight of the object to be dried, when the laundry is put into the rotating drum 2 and the motor 3 is driven to rotate the rotating drum 2 and then stopped, the inertia of the rotating drum 2 causes Since the rotating drum 2 does not stop instantaneously and continues to rotate for a short time, the motor 3 also rotates, and an electromotive force is generated at the electrode terminal of the motor 3.

The electromotive force is generated by the rotating drum 2 and the two-wing fan 7.
And the weight of the object to be dried (laundry)
The weight of the laundry is measured by measuring the electromotive force. Further, the amount of the circulation air for drying promotion is determined based on the initial weight of the drying target measured first and the cloth selected by the user, and the rotation speed of the ventilation fan for drying circulation 10 is determined.

In this embodiment, the amount of cloth and the amount of circulation air for promoting drying are set as shown in Table 1 below, and the amount of cloth and the amount of circulation air for promoting drying are set as shown in Table 2 below.
The number of rotations of the drying promotion circulation fan 10 is controlled so as to be an average value of the drying promotion circulation air flow determined by the cloth amount and the drying promotion circulation air flow determined by the user selected cloth.

[0030]

[Table 1]

[0031]

[Table 2]

Further, as the drying process proceeds, the amount of circulating air for promoting drying is increased or decreased according to the progress of the drying process. In this embodiment, the drying step and the amount of circulating air for promoting drying are set as shown in Table 3 below.

[0033]

[Table 3]

Thereafter, the amount of circulating air for promoting drying is increased or decreased according to the exhaust humidity of the rotating drum during drying. In this embodiment, as shown in Table 4 below, the humidity in the rotating drum and the amount of circulating air for promoting drying are set.

[0035]

[Table 4]

[0036]

Since the clothes dryer of the present invention has the above-described structure, the invention according to the first aspect of the present invention quickly transfers the heat of the heated air to the object to be dried to accelerate the drying and shorten the time required for the drying. At the same time, the humidity in the rotating drum approaches saturation and efficient drying can be performed.

Further, according to the second aspect of the present invention, by changing the amount of circulating air for promoting drying in accordance with the amount of cloth, efficient drying can be performed in accordance with the amount of cloth. According to the third aspect of the present invention, the delicate cloth can be dried with less damage to the cloth by changing the amount of circulating air for promoting drying depending on the cloth, and efficient drying suitable for the cloth can be performed.

According to the fourth aspect of the present invention, the object to be dried can be efficiently dried and the drying time can be shortened by variably controlling the amount of circulating air for promoting drying according to the drying progress time. Claim 5
According to the described invention, by changing the amount of circulating air for promoting drying in accordance with the humidity in the rotating drum, efficient drying can be performed in accordance with the evaporation of water in the rotating drum.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of an embodiment of a clothes dryer of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a control device of an embodiment of the clothes dryer of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clothes dryer main body 2 Rotary drum 3 Motor 5 Humidity sensor 6 Temperature sensor 7 Two-wing fan 9 Baffle 10 Drying promotion circulation fan 12 Duct 13 Duct heater 16 Hot air outlet 19 Baffle hole 20 Drying promotion circulation duct 21 Filter 23 Drying promotion circulation duct outside drum 24 Object to be dried 26 Operation panel 27 Control device

Claims (5)

(57) [Claims] 1. A rotating drum which is rotatably mounted in a main body and accommodates an object to be dried such as clothing, a driving device for rotating the rotating drum, and a blowing device for blowing drying air into the rotating drum. And a ventilation path through which drying air passes, a heating device that heats the drying air, and a dehumidifier that dehumidifies the drying air are disposed in a clothes dryer, and the air in the rotating drum is taken out from the baffle. A ventilation path and a ventilation fan are provided in the rotating drum and circulated again, and while rotating the rotating drum, two air flows of drying air that has been dehumidified and heated and drying promotion air that is blown out of the ventilation path are used. A clothes dryer for drying an object to be dried. 2. The clothes dryer according to claim 1, further comprising means for detecting a cloth amount of the object to be dried, and variably controlling a circulating air flow for drying promotion based on the detected cloth amount. 3. The clothes dryer according to claim 1, further comprising means for setting the cloth quality of the object to be dried, and variably controlling the amount of circulating air for drying promotion according to the set cloth. 4. The clothes dryer according to claim 1, wherein in the drying step of the object to be dried, the amount of circulating air for promoting drying is variably controlled depending on a drying progress time. 5. The clothes dryer according to claim 1, further comprising means for detecting humidity in the rotary drum, and variably controlling the amount of circulating air for promoting drying based on the detected humidity.