JPH0321756Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a dryer configured to cause air discharged from a drying chamber to flow into a heat exchanger to exchange heat with outside air.

[Technical background of the invention] This type of dryer has a fan as a heat exchanger, for example, by protruding blades on both sides of a rotating main plate, and the fan is activated by the air blowing action accompanying the rotation of the fan. Some use a blower type heat exchanger configured to circulate exhaust air from the drying chamber and outside air on both sides of the drying chamber to exchange heat between the two.

In this blower type heat exchanger, the casing is placed at the rear of the outer box so that the back side is closed by the back plate of the outer box, and the main plate of the fan introduces the exhaust air from the drying room into the casing. It is rotatably arranged so as to be divided into a chamber and an outside air introduction chamber. In order to seal between the exhaust gas introduction chamber and the outside air introduction chamber, a casing and an annular portion protruding inward are provided, while a bifurcated annular sealing member is attached to the main plate at the outer peripheral end of the fan. The seal members were attached so as to protrude outward in the radial direction, and these seal members were configured to slide into contact with both sides of the annular portion.

[Problems with the Background Art] However, in the conventional structure described above, two sheets of annular sealing material are pasted together to form a bifurcated sealing member, which results in poor workability.
Further, after assembly, it is necessary to check whether the bifurcated seal members are present on both sides of the annular portion and sandwich the annular portion, which is troublesome.

[Purpose of the invention] The purpose of the invention is to simplify the formation of the sealing member.
To provide a dryer that does not particularly require confirmation after assembly.

[Summary of the invention] In the present invention, a sealing member is formed from a soft material into a cylindrical shape with both axial ends facing in the axial direction of the fan, one end of the sealing member is attached to the outer peripheral end of the fan, and the other end is attached to the outer peripheral end of the fan. The side is deformed by the centrifugal force accompanying the rotation of the fan and is configured to slide into contact with the annular portion.

[Embodiment of the invention] An embodiment of the invention will be described below based on the drawings.

In FIG. 2, reference numeral 1 denotes an outer box, which has an entrance 3 for drying materials opened and closed by a door 2 on its front surface. 4 is a support plate fixed to the front back side of outer box 1;
A communication port 5 communicating with the entrance/exit 3 is formed in the center. Reference numeral 6 denotes a drum serving as a drying chamber, and its front side is rotatably fitted and supported on the outer periphery of the support plate 4, and a shaft 7 attached to the rear side is attached to a horizontal frame 8 fixed to the rear of the outer box 1, with a bearing 9 attached thereto. It is rotatably supported through. Reference numeral 10 denotes a blower type heat exchanger, which is disposed at the rear of the outer box 1 so as to face the rear surface of the drum 6.
This heat exchanger 10 includes a casing 11, and an exhaust introduction chamber 12 and an outside air introduction chamber 1 inside the casing 11.
A circular main plate 1 made of, for example, aluminum and rotatably supported on the shaft 7 so as to be divided into three parts.
4 and a fan 16 made of aluminum blades 15a and 15b protruding from both the front and rear sides of the main plate 14. The casing 11 is formed in the shape of a dish-shaped container with an open back, and is arranged so that its back is closed by the back plate 17 of the outer box 1. Then, the exhaust gas from the drum 6 is sucked into the exhaust introduction chamber 12 and the exhaust gas from the drum 6 is sucked into the exhaust introduction chamber 12.
A vent hole 19 is formed in the center of the casing 11 to communicate with the air outlet 18 of the drum 6, and an outlet (not shown) of the exhaust introduction chamber 12 is connected to the support plate 4 through a duct 20. It communicates with the air inlet 21 of the drum 6 formed in the lower part. Furthermore, an inlet 22 and an outlet 23 are formed in the back plate 17 of the outer box 1 to suck in and discharge outside air into the outside air introduction chamber 13. 24 is drum 6
and a motor that rotationally drives the main plate 14; 25 is a heater disposed within the duct 20;

Here, in the blower type heat exchanger 10, a seal structure between the exhaust gas introduction chamber 12 and the outside air introduction chamber 13 will be explained with reference to FIG. That is, 26
is an annular partition plate as an annular part, and the casing 11
A ring 27 made of, for example, stainless steel and having a small coefficient of friction is fitted onto the inner periphery of the ring 27, which is made of, for example, stainless steel. On the other hand, 2
Reference numeral 8 denotes a flange-shaped rim part integrally formed on the outer periphery of the main plate 14, which is the outer periphery of the fan 16. The front half of this rim part is inserted into the ring 27, and the rear end side has a substantially U-shaped attachment part. A portion 29 is integrally formed. 30
is a sealing member made of a soft material, such as felt, and is formed into a short cylindrical shape with both axial ends facing in the front-rear direction, which is the axial direction of the fan 16. This seal member 30 is fitted onto the outer periphery of the rim portion 28 of the fan 16, and the rear side, which is one end of both axial ends thereof, is inserted into the attachment portion 29 of the rim portion 28 and fixed by adhesive or the like. In this attached state, the other end of the seal member 30, ie, the front end, faces the inner circumferential surface of the ring 27 with a predetermined small gap therebetween.

Next, the operation of the above configuration will be explained. When the drying operation is started, the motor 24 and the heater 25 are energized. When the motor 24 is started by this energization,
The drum 6 rotates, and the main plate 14 and the blades 15a, 1
The air inside the drum 6 is sucked into the exhaust introduction chamber 12 by the centrifugal blowing action caused by the rotation of the fan 16, and is returned to the drum 6 through the duct 20. is sucked into the outside air introduction chamber 13 through the suction port 22 and discharged outward from the discharge port 23. The air hot-aired by the heater 25 and supplied into the drum 6 removes moisture from the material to be dried, and then is sucked into the exhaust introduction chamber 12 again, where the main plate 14 and the blades 15a, 15b The air is cooled and dehumidified by exchanging heat with the outside air by heat conduction through the air, and is then hot-aired again and supplied into the drum 6, thus circulating.

By the way, during the drying operation as described above, ring 2
The gap between the exhaust gas introduction chamber 12 and the outside air introduction chamber 13 must be sealed to prevent communication between the exhaust gas introduction chamber 12 and the outside air introduction chamber 13. This sealing is achieved as follows. That is, when the fan 16 rotates, the seal member 30 receives centrifugal force accompanying the rotation, and the non-fixed front end side deforms outward so that the diameter expands as shown by the two-dot chain line in FIG. sliding into contact with. As a result, the gap between the ring 27 and the rim portion 28 is sealed, the exhaust introduction chamber 12 and the outside air introduction chamber 13 are brought into a non-communicating state, and air circulation between the two 12 and 13 is prevented. It is.

According to the above configuration, unlike the conventional bifurcated seal member 30, it is only necessary to form the seal member 30 into a short cylindrical shape, so that its formation is extremely easy. Furthermore, when the fan 16 rotates, the front end of the seal member 30 deforms to expand in diameter due to the centrifugal force and automatically slides into contact with the ring 27. Therefore, after assembly, the seal member slides into both the front and rear sides of the annular portion. Unlike conventional seal members, in which it was necessary to confirm whether or not the seal is present, there is no need to perform such confirmation work after assembly, and the workability is excellent.

Incidentally, after the sealing member 30 is attached to the rim portion 28, the fan 16 is inserted into the casing 11 disposed within the outer box 1. At this time,
Assuming that the front end side of the seal member 30 is expanded in advance to a diameter that is large enough to slide into contact with the ring 27, the work of inserting the seal member 30 into the ring 27 is performed while being careful not to get caught on the ring 27. This would be extremely troublesome. However, according to this embodiment, there is no need to expand the diameter of the front end of the seal member 30 in advance, and the diameter is smaller than that of the ring 27, so the work of inserting the seal member 30 into the ring 27 is relatively easy. .

The present invention is not limited to the embodiments described above and shown in the drawings; for example, the specific structure of the fan constituting the blower type heat exchanger can be modified in various ways without departing from the spirit of the invention. It is.

[Effects of the invention] As explained above, in the present invention, the sealing member is formed from a soft material into a cylindrical shape with both axial ends facing in the axial direction of the fan, and one end of this sealing member is fixed to the outer peripheral end of the fan. However, since the other end is deformed by centrifugal force as the fan rotates and slides into contact with the annular part of the casing, the structure of the seal member is simple and easy to form, and the fan with the seal member attached can be attached to the casing. This provides excellent effects such as easy assembly work and no need to particularly check the form of the seal member after assembly.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a vertical cross-sectional view of the main parts, and FIG. 2 is a vertical cross-sectional side view of the entire dryer. In the figure, 1 is the outer box, 6 is the drum (drying room), and 10
1 is a blower type heat exchanger, 11 is a casing, 12 is an exhaust introduction chamber, 13 is an outside air introduction chamber, 14 is a main plate, 15
a, 15b are wing pieces, 16 is a fan, 24 is a motor, 25 is a heater, 26 is an annular partition plate (annular part),
27 is a ring, 28 is a rim portion, and 30 is a seal member.

Claims (1)

[Scope of utility model registration request] In a device in which air discharged from a drying chamber is caused to flow into a heat exchanger to exchange heat with outside air, the heat exchanger includes a casing, an annular portion provided inwardly protruding from the casing, a fan rotatably disposed in the casing so as to divide the interior into an exhaust introduction chamber and an outside air introduction chamber, and for exchanging heat between the two introduction chambers; The flexible seal member is formed into a cylindrical shape facing toward each other, and one end of the two axial ends is attached to the outer peripheral end of the fan, and the other end is deformed by centrifugal force accompanying rotation of the fan and slides into contact with the annular portion. A dryer characterized by: