JP2958666B2 - Air circulation 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 drier of the type in which heated clean air is circulated and an object to be dried is dried by the air (hereinafter referred to as an air circulation type drier). It is.

[0002]

2. Description of the Related Art As this type of dryer, for example, FIG.
There is something like that shown in As shown in the figure, a drying chamber 1 for accommodating an object to be dried in a casing 9 formed in a rectangular parallelepiped shape, and a communication passage 2 for communicating a lower part and an upper part of the drying chamber 1 with each other. And a fan 5 provided at the upper part of the communication passage 2 to create a downward air flow. A dust collecting filter 3 is provided downstream of the fan 5 and a sheathed heater 90 is provided upstream. (The terms upstream and downstream refer to the direction of air flow). In this drier, the position where the air inlet 91 is disposed is set as the outer component wall of the communication path 2.

When this dryer is used, first, an object to be dried is stored in the drying chamber 1, and then the fan 5 and the heater 90 are turned on. Then, by the heater 90,
The temperature of the surrounding air (atmosphere temperature) is increased by heating, and the air heated and increased by the fan 5 is circulated through the path of the dust collecting filter 3 → the drying chamber 1 → the communication path 2. .

[0004] Therefore, the object to be dried accommodated in the drying chamber 1 is dried by the purified heated air. However, the above dryer has a problem that much time is required to sufficiently dry the object to be dried. (Refer to the line b in FIG. 3) This is because heating of the object to be dried by the dryer is performed only by air-mediated conduction, and therefore, so-called rising requires a lot of time.

On the other hand, as shown in FIG. 5, although the basic configuration is the same as that described above, there is a configuration in which the heater 90 is disposed in the upper part of the drying chamber 1. In this one, drying room 1
Since the radiant heat of the heater 90 directly acts on the object to be dried accommodated therein, the object to be dried is dried in a short time. (Refer to the line C in FIG. 3) However, in this air circulating dryer, dust that could not be collected by the dust collecting filter 3 or was attracted to the drying chamber 1 from the outside accumulates on the upper surface of the heater 90. As a result, there is a problem that the accumulated dust is scattered by the turbulence in the drying chamber 1 generated by the presence of the heater 90. That is, in this case, the predetermined cleanliness in the drying chamber 1 cannot be secured.

[0006]

Therefore, according to the invention of this application, the time required for rising can be shortened, the object to be dried can be dried sufficiently in a short time, and the drying chamber can be kept in a clean atmosphere. It is an object to provide an air circulation dryer.

[0007]

According to the first aspect of the present invention,
In the drying chamber 1 in which the material to be dried is stored,
And a communication path 2 for communicating with the drying chamber 1.
Air is discharged between the passage 2 and the drying chamber 1
A fan 5 for air circulation is arranged and the fan 5
The dust collection filter 3 is arranged on the air discharge side,
Is a fan 5, a dust filter 3, a drying chamber 1, a communication passage 2,
It is made to circulate in the arrangement order of the fans 5,...
Electromagnetic waves are radiated from the outside of the drying chamber 1 to the inside of the drying chamber 1
The far infrared heater 4 is arranged .

According to the first aspect of the present invention, the dust collecting filter 3 is located at the upper part of the drying chamber 1, and the far infrared heater 4 is provided above the dust collecting filter 3. The radiation direction of the electromagnetic wave in the far infrared heater 4 may be set downward.

[0009]

The invention of this application has the following functions. Fan 5
When the far-infrared heater 4 is turned on, the air in the air-circulating dryer is disposed in the far-infrared heater 4 → the dust collecting filter 3 → the drying chamber 1 → the communication path 2 → the far-infrared heater 4. Therefore, the ambient temperature in the drying chamber 1 rises as in the conventional case. That is, the object to be dried in the drying chamber 1 is heated by conduction mediated by air.

Further, according to the invention of this application, since the electromagnetic wave from the far-infrared heater 4 is radiated to the drying chamber 1 through the dust collecting filter 3, in addition to the above-described operation, the drying chamber 1 The object to be dried accommodated therein is given radiant heat, and the object to be dried is heated. On the other hand, in this case, the far infrared heater 4
Since the dust collecting filter 3 is interposed between the drying chamber 1 and the drying chamber 1, even if dust accumulates on the upper surface of the far-infrared heater 4, a large amount of the accumulated dust is scattered in the drying chamber 1. It will not be.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention; This embodiment is an air circulation type dryer used in a clean room, in which the clean air in the clean room is sucked in from an air inlet, and the air to be dried which requires clean drying using the air is used. A jig or the like as a material is dried.

In this apparatus, as shown in FIG. 1, a partition wall 8 for dividing the inside of a rectangular parallelepiped casing 9 having a heat insulating material on the inner surface is provided. The passage 2 is configured. Partition wall 8 described above
1 comprises a vertical wall 80, an upper horizontal frame 81 and a horizontal frame 82. The upper horizontal frame 81 is attached to the upper wall of the casing 9 at a predetermined interval, and the vertical wall 80 The communication path 2 described in the column of “Means” is attached to the space between the rear wall of the casing 9 and the vertical wall 80 and between the upper wall and the lower horizontal frame 82 of the casing 9. Of space.

In this embodiment, as shown in FIG. 1, the air circulating fan 5 is mounted on the upper horizontal frame 81 and the dust collecting filter 3 having a corrugated cross section is airtightly sealed to the lower horizontal frame. On the other hand, a plurality of far-infrared heaters 4 are arranged between the fan 5 and the dust collecting filter 3 in such a manner that the radiation direction of the electromagnetic waves is on the drying chamber 1 side.

In this embodiment, an air inlet 91 is formed on the rear wall of the casing 9 constituting the communication passage 2, and the front wall constituting the drying chamber 1 is opened and closed as shown in FIG. The door 92 is provided. Since the air circulating dryer of this embodiment is configured as described above, the object to be dried accommodated in the drying chamber 1 is heated by conduction and radiation as described in the column of operation. As a result, the rise time can be shortened, and the object to be dried can be sufficiently dried in a short time. Further, since the dust collecting filter 3 is interposed between the far-infrared heater 4 and the drying chamber 1, even if dust accumulates on the upper surface of the far-infrared heater 4, the accumulated large amount of dust is dried. It is not scattered in the chamber 1, and as a result, the cleanliness in the drying chamber 1 can be ensured.

Here, the rise time of the dryer of this embodiment is shown as a line in FIG. The specifications of the dryer used in this experiment and the conventional dryer are as follows. Casing 9 (common part with it dryers and conventional in this example): High 1800 × width 800 × inner 1000 drying chamber 1: High 1450 × width 800 × inner 750 circulating air volume: about 60 m ³ / min MAX Drying Temperature: 40 ° C. ( difference between the dryer of this embodiment and the conventional one) Heater of conventional dryer: Seed type heater, 2.0 k
w Heater of dryer of this embodiment: far infrared heater, 1.2 k
w From FIG. 3 described above, the time required for the rise is about 2 minutes in the dryer of this embodiment, while it is about 2 minutes in the dryer of the conventional type, which can be reduced to about 1/10. I understand.

[0016]

Since the invention of this application has the above-described configuration, it has the following effects. The object to be dried accommodated in the drying chamber 1 is heated by conduction and radiation, so that the rise time can be shortened, and even if dust accumulates on the upper surface of the far-infrared heater 4, the dust accumulates. A large amount of dust will not be scattered in the drying chamber 1.

Accordingly, it is possible to provide an air circulation type dryer capable of sufficiently drying the object to be dried in a short time and maintaining a clean atmosphere in the drying chamber.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an air circulation type dryer according to the invention of this application.

FIG. 2 is a front view of the air circulation dryer.

FIG. 3 is a diagram showing the rise time of the air circulating dryer and that of a conventional type.

FIG. 4 is a cross-sectional view of a conventional air circulation dryer.

FIG. 5 is a cross-sectional view of another conventional type of an air circulation type dryer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying room 2 Continuous passage 3 Dust collection filter 4 Far infrared heater 5 Fan

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Watanabe 2-1844-2 Kozoji-cho, Kasugai-shi, Aichi Prefecture Inside Fujitsu VSI Co., Ltd. (72) Inventor Nobuyuki Higashino 172 Ikezawacho, Yamatokoriyama-shi, Nara Prefecture Inside the Nara Factory (56) References JP-A-62-183894 (JP, A) JP-A-63-130776 (JP, A) JP-A-2-312233 (JP, A) U) Shokai Sho 59-70593 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F26B 21/04 F26B 3/04 F26B 3/30

Claims (2)

(57) [Claims] 1. A drying chamber 1 in which a material to be dried is stored.
A communication path 2 for connecting and connecting the lower part and the upper part of the
Air is supplied between the drying chamber 1 and the communication passage 2 toward the drying chamber 1.
In addition to arranging the fan 5 for air circulation to discharge
A dust filter 3 is disposed on the air discharge side of the fan 5.
And the air is supplied by fan 5, dust filter 3, drying room
Circulate in the arrangement order of 1, communication passage 2, fan 5,...
The drying chamber 1 from outside to inside.
An air-circulating dryer in which a far-infrared heater 4 for emitting a magnetic wave is arranged . 2. A drying chamber 1 in which a dust collecting filter 3 is disposed.
And the far-infrared heater 4 is connected to the filter 3 for dust collection.
The air circulation type dryer according to claim 1, wherein the radiation direction of the electromagnetic wave in the far-infrared heater (4) is set to a lower side.