JPH0551317B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is equipped with a heat exchange type double-sided fan, which circulates drying air in a drying chamber, and also introduces and draws out external air as cooling air. The present invention relates to a so-called dehumidifying type clothes dryer that removes moisture by exchanging heat between drying air and cooling air using a fan, and then reheats the drying air using a heater and supplies the heated air to a drying chamber.

(b) Conventional technology An example of this type of clothes dryer is
JP-A No. 1983-1997 discloses a labyrinth connection between the outer peripheral edge of a double-sided fan and a partition plate.
It is disclosed in Publication No. 284300.

A similar structure will be described based on FIG. 2. A clothes dryer frame 1 has a front plate 2 fixed to its front opening and a rear plate 3 fixed to its rear opening. The front plate 2 is provided with a clothing entrance 4, which can be opened and closed by a door 5. The rear plate 3 has an inlet 6 for introducing cooling air, which is external air, in the center, and an outlet 7 in the lower part. A metal annular drum support plate 8 is fixed near the clothing entrance 4 so as to surround this entrance. A support plate 9 is fixedly attached. These drum support plate 8 and support plate 9 are fixed to the machine frame 1.

A support shaft 10 is horizontally suspended from the center of each of the rear plate 3 and the support plate 9, and is fixed to the rear plate 3 with bolts.

A horizontal shaft-type rotating drum 11, which is a drying chamber for accommodating clothes and drying them by stirring, has a front opening facing the clothes entrance 4 and is rotatably supported on a drum support plate 8 via felt or the like. Support plate 9 on the rear end surface
It is rotatably supported via a bearing on a support shaft 10 that has been inserted therethrough. There is a drying air outlet 1 in the center of the rear end surface.
2 is provided, and there is a lint filter 13
It has a removable lid. Dry air inlet 14
is provided on the drum support plate 8.

A vent hole 15 is formed in the support plate 9 facing the outlet 12, and a sealing member that slides on the support plate 9 is provided on the rear end surface of the drum 11 in order to airtightly seal the passage between the outlet 12 and the vent hole 15. 16 is attached.

Dry air outlet 12 provided on the rotating drum 11
The support shaft 1 between the rear plate 3 and the support plate 9
0, a heat exchange type double-sided fan 17 is rotatably fixed via a bearing. This double-sided fan 17
is a ring-shaped outer circumferential portion 19 from the central rotating cylinder portion 18.
The cooling fan surface 20 is formed on the support plate 9 side, and the cooling fan surface 21 is formed on the rear plate 3 side. A rotating groove group 22 consisting of three concentric rotating grooves that also serves as the outer circumferential portion is formed in the outer circumferential direction of the outer circumferential portion 19. The rotation groove group 22 has its opening facing the support plate 9 side. In addition, the double-sided fan 17 has a rotary cylinder part 18, an outer peripheral part 19, each fan surface 20, 21, and a rotary groove group 22 integrally molded from resin.

A motor 23 is disposed at the lower right corner of the machine frame 1, and rotates the rotary drum 11 at low speed using a pulley belt, and rotates the double-sided fan 17 at high speed using a pulley belt 24. The direction of rotation is clockwise (clockwise) when viewed from the front.

A circulating drying air passage 25 located at the lower left corner of the machine frame 1 is fixed to the support plate 9. This wind path 2
5 is an outlet 12, a vent 15, a circulation fan surface 20
A condensed water discharge port 26 is provided along the way, and a heater 27 made of a positive temperature coefficient thermistor is provided near the inlet 14.

A partition plate 28 is disposed to cover and partition the outer periphery of the double-sided fan 17 of the drying air passage 25, and its annular inner circumferential portion 29 faces the rotating groove group 22. A fixing groove group 30 consisting of three concentric fixing grooves, which also serves as the inner circumferential portion, is formed in the inner circumferential portion 29 toward the center. This fixed groove group 3
0 has its opening facing the rear plate 3 side, and is loosely fitted into the rotation groove group 22 without contacting each other.
That is, the rotating groove group 22 and the fixed groove group 30 form a labyrinth connection.

In this way, the drying air passage 25 and the cooling air passage 31 are divided by the double-sided fan 17 and the partition plate 28.

During drying work, the motor 23 and heater 27
is activated to rotate the rotating drum 11 at a low speed and the double-sided fan 17 at a high speed to the right (clockwise). The drying air is supplied by the circulation fan surface 2 of the double-sided fan 17.
0 from the outlet 12 of the rotating drum 11 to the vent 1
5 into the drying air path 25, and the drying air path 25
The liquid is circulated through the interior and supplied to the rotating drum 11 again from the inlet 14. Further, the cooling air flows in and out of the cooling air passage 31. The drying air that heats the clothes and contains moisture is cooled by a double-sided fan 17 to condense the moisture. The condensed water flows down the drying air passage 25 side and exits to the outlet 2.
6 and is discharged to the outside.

The drying air passage 25 and the cooling air passage 31 are sealed by a labyrinth connection, and the dehumidification effect due to heat exchange of the drying air is sufficiently and reliably performed because there is little leakage of the drying air, and the efficiency is improved. rises.

(c) Problems to be solved by the invention In such a conventional example, the double-sided fan 17 and the rotating groove group 2
2 are integrally molded from resin. Therefore, the shrinkage after molding gradually progresses from the time of molding shown in Figure 3 A, and the mold tilts by Δt as shown in Figure 3 B, and when rotating, it comes into contact with the fixed groove group due to a slight rotational vibration. There is. It is also affected by heating during operation.

Note that this slope (Δt) is, as shown in Figure 4,
This problem can be solved by integrally molding the ribs 22' that protrude outward. However, this has the drawbacks of increasing the depth and impairing the flow of cooling air (external air).

The present invention deals with tilting and warping due to shrinkage after molding with a simple structure, maintains a sealing effect against changes over time, and prevents contact resistance from occurring during rotation.

(d) Means for Solving the Problems The solution according to the present invention is to shorten the protruding length of the ribs of the rotating groove group and/or the ribs of the stationary groove group away from the rotation center of the double-sided fan. .

(e) Effect When the rotating groove group gradually tilts after molding and is almost solidified, the further away from the center of rotation it is, the deeper it will fit (loosely fit) into the fixed groove group. Also, make sure that the fit is not too deep.

(F) Embodiment Since the overall configuration is the same as the conventional example, the explanation will be omitted, and the main parts will be explained based on FIG. 1. Note that the reference numerals used in the conventional example are used.

A double-sided fan 17 is disposed in the drying air passage 25 stopped by the support plate 9, and a partition plate 28 partitions the outer circumference of the double-sided fan 17 to form a cooling air passage 31 between it and the rear plate 3.

The three inward ribs (walls) 32, 33, and 34 forming the rotation groove group 22 have a protruding length that decreases as the distance from the rotation center increases. That is, 32<
33<34.

On the other hand, the three outward ribs (walls) 35, 36, and 37 forming the fixed groove group 30 also have their protruding lengths reduced as they move away from the center of rotation. That is, 35
<36<37.

The expected inclination Δt, the distance t between the rib 32 and the bottom of the fixed groove, and the distance t ₀ between the rib 37 and the bottom of the rotating groove are set to be t=t ₀ +Δt.

In this way, even if the rotary groove group 22 tilts inward due to contraction after molding, the ribs 32, 33, and 34 will almost never come into contact with the bottom surface of the fixed groove group 30.

If the ribs constituting the groove groups 22 and 30 were shortened across the entire groove group, the sealing effect would be insufficient, but by making the ribs shorter as they move away from the center of rotation, the sealing effect can be ensured.

Incidentally, although the fixing groove group 30 of the partition plate 28 is originally inclined due to contraction, the partition plate 28 is different from the fan 17 in that almost the entire area is fixed to the passage 25 and the outlet 12 of the rotating drum 11 is fixed. The tilt is suppressed because the hot dry air from the outside does not hit the building directly.

(G) Effects of the Invention According to the present invention, even if a double-sided resin fan is tilted due to shrinkage after molding, there is almost no contact at the labyrinth joint or a decrease in the sealing effect, and the drying efficiency is improved. It is possible to provide a clothes dryer that maintains a high level of energy and makes less noise.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of the main part of the clothes dryer according to the present invention, Fig. 2 is a side sectional view, and Fig. 3 A and B are side views of the main part of the conventional example during molding and shrinkage after molding. FIG. 4 is a side sectional view of the main part of the conventional example. 17...Double-sided fan, 22...Rotating groove group, 28
... Partition plate, 30 ... Fixed groove group, 32 to 37 ...
rib.

Claims (1)

[Claims] 1. A drying room for storing and drying clothes, a circulation fan surface that is placed opposite the outlet provided in this drying room and that circulates drying air to the drying room, and a cooling device that introduces and directs cooling air. A heat exchange type double-sided fan that has fan surfaces integrated on the front and back sides and exchanges heat between the circulating drying air and the introduced cooling air, and a double-sided fan that has an inner periphery facing the outer periphery of this double-sided fan. and a partition plate that partitions the drying air passage and the cooling air passage, and the outer periphery of the double-sided fan is provided with a rotating groove group constituted by a plurality of concentric ribs, and the inner periphery of the partition plate is provided. A fixed groove group constituted by a plurality of concentric ribs is provided in the part, and each rib of the rotating groove group and the fixed groove group is loosely fitted into the opening of the other groove group, A clothes dryer characterized in that the protruding length of the ribs of the rotating groove group and/or the ribs of the stationary groove group is shortened at a distance from the rotation center of the double-sided fan.