JPH06178896A - Dryer - Google Patents

Abstract

PURPOSE:To keep the good drying performance by removing moisture through the heat exchange between the inside sir and the outside air of a dryer while reducing the effects of the outside temperature. CONSTITUTION:An electronic cooling device 19 is arranged so that its heat absorber side 19a is placed at the upstream and its radiator side 19b at the downstream in a connection duct 16 located between a dehumidifier 5 and a heater 17 in a air circulating path in a drum 2 (drying room). The air passing through the dehumidifier 5 is cooled at the absorber side 19a and further dehumidified to compensate for the deficient dehumidification by the dehumidifier 5 due to the higher outside temperature. In this case, the air dehumidified on the absorber side 19a od then heated by the radiator side 19b, that is, the air is preheated before it is heated by the heater 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidifying type dryer.

[0002]

2. Description of the Related Art Conventionally, in this type of dehumidifying type dryer, the air in the drying chamber is passed through a dehumidifying device for dehumidifying by exchanging heat with the air outside the unit, and then heated by a heater to be dried in the drying chamber. The material to be dried is adapted to be dried by carrying out a circulation to return the material to be dried.

[0003]

However, the dehumidifying device for dehumidifying the air in the drying chamber by exchanging heat with the air outside the machine is greatly affected by the temperature of the air outside the machine.
Especially when the temperature of the outside air is low compared to when the temperature is low, the air in the drying chamber cannot be sufficiently cooled, and therefore dehumidification cannot be performed sufficiently, so that the drying performance is lowered and the drying time is reduced. It had a problem that it took a long time or insufficient drying occurred.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a dryer capable of maintaining the drying performance as excellent as possible by reducing the influence of the temperature of the outside air.

[0005]

In order to achieve the above object, in the dryer of the present invention, an electronic cooling device is provided at a position between the dehumidifying device and the heater in the drying room air circulation path, and the heat absorbing side thereof is provided. It is characterized in that it is arranged upstream and the heat radiation side is arranged downstream.

In this case, it is more preferable that the portion of the circulation path in which the electronic cooling device is arranged is formed in a labyrinth shape in which flowing air circulates from the heat absorbing side to the heat radiating side of the electronic cooling device.

[0007]

According to the above means, the air passing through the dehumidifier is
After that, the heat is cooled on the heat absorption side of the electronic cooling device and further dehumidified, so that it is possible to compensate for the insufficient dehumidification by the dehumidifying device when the outside temperature is high. Further, since the air dehumidified on the heat absorption side of the electronic cooling device is thereafter heated on the heat radiation side, preheating before heating by the heater can be performed.

In this case, however, if the circulating air is formed in a labyrinth in which the flowing air circulates from the heat absorbing side to the heat radiating side of the electronic cooling device, the air flows in the electronic cooling device. The heat absorbing side and the heat radiating side are effectively contacted with each other, and cooling (dehumidification) and heating can be performed more efficiently.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a clothes dryer will be described below with reference to the drawings. First of all, FIG. 1 shows an outer box 1 of the entire clothes dryer, in which a drum 2 constituting a drying chamber is rotatably supported and disposed, and an object to be dried communicating in the drum 2 is provided on a front surface portion. Door 4 that opens and closes doorway 3
Has been installed. Further, a dehumidifying device 5 is arranged in the rear portion of the outer box 1. Specifically, the dehumidifying device 5 includes a casing 6 and front and rear blades rotatably supported and arranged in the casing 6. The heat exchanger 7 also functions as a blower fan, and therefore the dehumidifying device 5 as a whole also serves as a blower device.

With respect to the dehumidifying device 5, the drum 2 is provided with an air outlet 9 communicating with the front air inlet 8 of the casing 6 at the center of the back, and the air outlet 9 is covered. The filter 10 is attached, while the back plate 11 of the outer box 1 is
An air inlet 13 leading to a rear air inlet 12 of the casing 6,
An unillustrated air outlet communicating with the rear air outlet 14 of the casing 6 is formed.

Then, one end of a connecting duct 16 is connected to the front air outlet 15 existing in the lower front portion of the casing 6, and the other end of the connecting duct 16 has a heater duct 18 in which a heater 17 is installed. And is connected to the inside of the drum 2 through the heater duct 18 from its lower front portion.

Here, the connecting duct 16 is the dehumidifier 5
This is a member located between the heater 17 and the heater 17. An electronic cooling device 19 is arranged in the middle of the connecting duct 16. This electronic cooling device 19 has a large Peltier effect,
In addition, a large number of bismuth, antimony, and tellurium-based semiconductors having low thermal conductivity are alternately connected in series in an n-type and a p-type, and by passing a current through the one-side 19a shown in FIG. The other side 19b functions as a heat radiating section, and the other side 19b functions as a heat radiating section. The heat absorbing side 19a is the upstream side of the air passing through the connecting duct 16, and the heat radiating side 19b is the downstream side. It is arranged inside.

In the middle portion of the connecting duct 16 in which the electronic cooling device 19 is arranged, the air flowing in the connecting duct 16 is absorbed by the first guide plate 20 and the second guide plate 21. It is formed in a labyrinth shape that extends from 19a to the heat radiation side 19b.

In addition to this, a motor (not shown) is provided in the outer box 1, and the drum 2 is rotated by this motor via a belt 22 wound around the outer peripheral portion thereof, and at the same time, the heat exchanger 7 (blower fan). ) Is rotated via a belt 24 that is wound around the central pulley portion 23.

Therefore, in the case of the above-mentioned structure, when the operation is started, the heater 17 is heated and the motor is started, so that the drum 2 and the heat exchanger 7 are rotated, whereby the drum 2 is rotated. To be dried (in this case,
(Clothes) is agitated, and the air in the drum 2 is sucked from the filter 10 through the air outlet 9 to the front part in the casing 6 of the dehumidifying device 5 and discharged to the connecting duct 16. At the same time, the air outside the machine is discharged. The air is sucked into the rear part of the casing 6 from the air inlet 13 of the box back plate 11, and is discharged out of the machine from an air outlet (not shown) of the outer box back plate 11. Therefore, in the casing 6, the air inside the drum 2 and the air outside the machine contact the heat exchanger 7 as a boundary to exchange heat, that is, the air inside the drum 2 is cooled by the air outside the machine to dehumidify. To be done. The dehumidified air then contacts the heat absorption side 19a of the electronic cooling device 19 and then the heat dissipation side 19b in the process of passing through the inside of the connection duct 16. As a result, the air dehumidified by the dehumidifier 5 is further cooled and dehumidified by the heat absorption side 19a of the electronic cooling device 19, and the further dehumidified air is heated and raised by the heat radiation side 19b of the electronic cooling device 19. Be warmed.

In this case, the air flowing in the connecting duct 16 is absorbed by the first guide plate 20 and the second guide plate 21 at the intermediate portion in the connecting duct 16 in which the electronic cooling device 19 is arranged. Since it is formed in a labyrinth shape from 19a to the heat radiation side 19b, the flowing air effectively contacts the heat absorption side 19a and the heat radiation side 19b of the electronic cooling device 19, respectively,
Therefore, the above-mentioned cooling (dehumidification) and heating can be performed more efficiently.

The air passing through the connecting duct 16 then reaches the inside of the heater duct 18 and is heated by the heater 17 to become the necessary warm air, so that the duct 2
The material to be dried is dried by repeating the above air circulation.

As described above, in this structure, the air inside the drum 2 is passed through the dehumidifier 5 for dehumidifying by exchanging heat with the air outside the machine, and then cooled by the heat absorption side 19a of the electronic cooling device 19. By this, since dehumidification is further performed, it is possible to compensate for the lack of dehumidification by the dehumidification device 5 when the temperature of the outside air is high, and thus the influence of the temperature of the outside air is minimized and the drying performance is maintained good. can do.

Further, in this case, since the air dehumidified on the heat absorption side 19a of the electronic cooling device 19 is thereafter heated on the heat radiation side 19b, the heating by the heater 17 can be preheated, and it can be performed as one unit. Since it can be achieved by the electronic cooling device 19, the efficiency is high and the structure is compact.

Further, in this case, since the flow path is formed in a labyrinth so that the flowing air circulates from the heat absorbing side 19a of the electronic cooling device 19 to the heat radiating side 19b, the air is absorbed into the heat absorbing side 19a of the electronic cooling device 19. And the heat radiation side 19b are effectively contacted with each other, and cooling (dehumidification) and heating can be performed more efficiently.

Although the present invention is applied to the clothes dryer in the above embodiments, the present invention is not limited to this, and is similarly applied to, for example, a tableware dryer or a tableware washing machine having a tableware drying function. It can be carried out.

When applied to a clothes dryer for implementation,
The drying chamber may be a cabinet type stationary type instead of a drum.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and may be appropriately modified and implemented without departing from the scope of the invention.

[0024]

The dryer of the present invention is as described above and has the following effects. In the dryer of claim 1, the air in the drying chamber is passed through a dehumidifying device that dehumidifies by exchanging heat with the air outside the device, and is heated by a heater,
In an apparatus for drying an object to be dried by performing circulation for returning to the drying chamber, an electronic cooling device is provided at a position between the dehumidifying device and the heater in the circulation path.
By arranging the heat absorbing side on the upstream side and the heat radiating side on the downstream side, it is possible to further dehumidify the air having passed through the dehumidifier by cooling it on the heat absorbing side of the electronic cooling device. As a result, the drying performance can be maintained satisfactorily without being affected by the temperature of the air outside the machine as much as possible, and the air dehumidified on the heat absorption side of the electronic cooling device can be subsequently heated on the heat radiation side. The preheating of the heating can be performed, the operation can be efficiently performed, and the structure can be compact.

In the dryer according to the second aspect, in addition to the above structure, a portion of the circulation path where an electronic cooling device is further disposed,
Since the flowing air circulates from the heat absorption side to the heat dissipation side of the electronic cooling device in a labyrinth shape, the air can be effectively contacted with the heat absorption side and the heat dissipation side of the electronic cooling device, and cooling (dehumidification) and heating can be performed. Can be performed more efficiently.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of FIG. 1A.

[Explanation of symbols]

2 is a drum (drying chamber), 5 is a dehumidifying device, 16 is a connecting duct (a position between the dehumidifying device and the heater in the circulation path), 17 is a heater, 19 is an electronic cooling device, and 19a is a heat absorbing side of the electronic cooling device. , 19b is a heat dissipation side, 20 is a first guide plate, and 21 is a second guide plate.

Claims (2)

[Claims] 1. An object to be dried is dried by passing through a dehumidifier for dehumidifying the air in the drying chamber by exchanging heat with the air outside the machine, heating the heater and returning it to the drying chamber. In the drying method, the electronic cooling device is arranged at a position between the dehumidifying device and the heater in the circulation path, and the heat absorption side is upstream and the heat radiation side is downstream. Machine. 2. The dryer according to claim 1, wherein the portion of the circulation path where the electronic cooling device is disposed is formed in a labyrinth shape in which flowing air circulates from the heat absorbing side to the heat radiating side of the electronic cooling device.