JPH0548719B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a clothes dryer, and more particularly,
The present invention relates to an improvement in a heat exchange fan located at the rear of a rotating drum, which has a function of blowing heated air within the dryer main body and also has a heat exchange function inside and outside the dryer main body.

[Conventional technology]

A clothes dryer generally consists of a dryer main body with a clothes input port, a rotating drum installed inside the dryer main body for storing clothes, and a rotating drum located at the rear of the rotating drum that circulates heated air inside the dryer main body. It is composed of a heat exchange fan that has an air blowing function and a heat exchange function inside and outside the dryer main body.

The prior art related to clothes dryers is described in, for example, Japanese Patent Application Laid-Open No. 59-66637.

[Problems to be Solved by the Invention] Clothes dryers that use heat exchange fans are advantageous in terms of product size reduction and cost reduction, but conventionally proposed clothes dryers do not ,
Attention has been focused only on increasing the air blowing capacity, and no consideration has been made from the viewpoint of simultaneously satisfying the conflicting effects of increasing the air blowing capacity and reducing noise.

The present invention has been made in consideration of the above points, and its purpose is to increase the blowing capacity, that is, to improve the blowing efficiency of heated circulating air, and to improve the heat exchange efficiency and reduce noise. It is called reduction.
The purpose of the present invention is to provide an improved clothes dryer that can simultaneously satisfy contradictory effects.

[Means for solving problems]

The purpose is to provide a dryer main body having a clothes input port, a rotating drum installed in the dryer main body for storing clothes, a heater heating drying air flowing into the rotating drum, and a heater installed at the rear of the rotating drum. In the clothes dryer, the clothes dryer has a blowing function for circulating drying air through a rotating drum, and a heat exchange fan having a heat exchange function between the drying air and cooling air outside the dryer main body. The cooling side blade of the heat exchange fan is bent backward with respect to the rotation direction of the heat exchange fan, and the drying air circulation side blade of the heat exchange fan is bent forward with respect to the rotation direction of the heat exchange fan. This is achieved by bending.

[Effect]

According to the present invention having the above configuration,
The drying air circulation side blade of the heat exchange fan,
By curving the heat exchange fan forward in the direction of rotation, it is possible to increase the blowing capacity, that is, to improve the blowing efficiency of heated circulating air, and in turn to improve the heat exchange efficiency. By bending the cooling side blade of the fan backwards with respect to the rotational direction of the heat exchange fan, it is possible to reduce the noise of the clothes dryer as a whole.

〔Example〕

Hereinafter, the present invention will be explained based on one embodiment of the drawings.
1b is a view taken in the Y direction of FIG. 3, which is also the main part of the present invention, FIG. 2 is a vertical side view showing the overall structure of the clothes dryer, and FIG. is the second
It is a partially enlarged view of the figure.

In Fig. 2 showing the overall configuration of the clothes dryer,
1 is the main body of the dryer; 2 is a rotary drum that is rotatably installed in the main body 1 and driven by a motor 3 and a drum belt 4; 5 is a clothes slot provided on the front of the main body 1; 6 is a rotating drum. A heater 7 heats the drying air flowing into the main body 2; It has a function of blowing heated circulating air, and also has a function of exchanging heat inside and outside the main body 1. Reference numeral 9 denotes a casing, and the casing 9 is located on the rear surface of the rotating drum 2, and has an air intake port 10 in the center thereof. 11 is a lint removal filter installed on the rear surface of the rotating drum 2;
7 is a mounting plate fixed to the rear surface of the main body 1;
7 supports the rotating shaft 14 of the heat exchange fan 7, and connects the casing 9 and partition plate 15 to the main body 1.
Fixed to. 20 is a back plate that covers the rear surface of the main body 1;
Reference numeral 3 designates a cooling side intake port for sucking outside cooling air into the heat exchange fan 7, and 19 represents a cooling side exhaust port for exhausting the cooling outside air after heat exchange to the outside of the main body 1. It is provided on the back plate 20. The back plate 20 described above covers the rear surface of the main body 1 from the outside of the mounting plate 17 and the fan belt 8, and covers the cooling side of the heat exchange fan 7 exposed on the rear surface of the main body 1, so that cooling air can be Configure the casing. Moreover, the casing 9 described above constitutes a casing on the drying air side. Furthermore, the partition plate 15 partitions the outer circumferential portion of the heat exchange fan 7 into front and rear parts, thereby airtightly separating the drying side and the cooling side.
Reference numeral 16 denotes a circulation duct, and the circulation duct 16 constitutes a ventilation path that guides the circulation-side exhaust of the casing 9 to the heater 6. Reference numeral 18 indicates a drain port through which condensed water generated by the heat exchange action of the heat exchange fan 7 is discharged.

In the above configuration, when the clothes dryer shown in FIG. 2 is operated, the high temperature and high humidity heated circulating air in the dryer main body 1 is cooled and heat exchanged by the heat exchange fan 7, and the Moisture condenses. On the other hand, the air inside the main body 1 that has been dehumidified as described above is heated by the heater 6 and introduced into the rotating drum 2 again. The clothes stored inside will continue to dry.

In addition, in FIG. 2, arrow A indicates the flow of heated circulating air within the dryer main body 1, and
Arrow B indicates the flow of heat exchange cooling air inside and outside the main body 1.

Here, the details of the heat exchange fan 7, which is the main part of the present invention, will be explained based on FIGS. 1a, 1b, and 3. In FIG. In the fan blade, 22 is a main plate that supports the inner periphery of the central part of the blade 21, 24 is an outer peripheral plate that supports the blade 21 from the outer periphery, and 23 is a boss for inserting the rotating shaft 14 into the center of the main plate 22. 25 is a drying air circulation side blade, and the circulation side blade 25 is a wave-shaped blade 21.
The outer circumferential plate 24 is integrally connected to the outer circumferential portion 27 of the outer circumferential plate 24 . 26 is a cooling side blade, and like the circulation side blade 25, the cooling side blade 26 is integrated with the outer peripheral part 27 of the wave-shaped fan blade 21,
It is connected to the outer peripheral plate 24. Note that the wave-shaped fan blades 21 alternately protrude toward both sides of the outer peripheral plate 24, but the circulation side blades 25 and the cooling side blades 26 are independent of each other with respect to the outer peripheral plate 24. It is provided.

In FIG. 3, the air that has flowed into both sides of the heat exchange fan 7 flows adjacently through the grooves on both sides of the fan blade 21 without mixing, and after exchanging heat through the wall surfaces, the air is circulated. The air flows in the direction of the side blades 25 and the cooling side blades 26, and in FIG. 3, arrow C indicates the flow of air on the circulation side of the heat exchange fan 7, and arrow F
indicates the flow of air on the cooling side.

In FIG. 1a showing the configuration of the cooling side blade 26, an arrow E indicates the rotation direction of the heat exchange fan 7. As shown in FIG. The fan blade 21 is formed linearly radially from its rotation center axis, and the cooling side blade 26 that connects the outer peripheral part 27 of the fan blade 21 and the outer periphery of the outer peripheral plate 24 is formed in the rotation direction of the heat exchange fan 7 (arrow E). The fan blade 21 is connected to the fan blade 21 in a curved state backward with respect to the fan blade 21. Further, in FIG. 1b showing the configuration of the circulation side blade 25, the circulation side blade 25 is bent forward with respect to the rotation direction of the heat exchange fan 7 (direction of arrow E), and is attached to the fan blade 21. They are installed consecutively. That is, the circulation side blades 25 and the cooling side blades 26 are curved in directions opposite to each other with respect to the rotational direction of the heat exchange fan 7.

Here, the overall operating system of the clothes dryer will be described below, although it partially overlaps with the above description.

When the power is turned on and the motor 3 is driven, the rotary drum 2 containing clothes rotates, and at the same time, the heat exchange fan 7 rotates. And rotating drum 2
The hot and humid air inside is drawn into the heat exchange fan 7 through the intake port 10 of the casing 9, as shown by arrow A in FIG. 2, and is heat exchanged on the surface of the fan blade 21. The water produced by the concentration is discharged to the outside of the dryer main body 1 through the drain port 18. On the other hand, the air dehumidified by the condensation is
It is sent to the heater 6 through the circulation duct 16,
Here, it is reheated and circulated within the rotating drum 2. In addition, as the heat exchange fan 7 rotates, air flows also within the back plate 20, and this air flow flows through the main body 1 as shown by arrow B in FIG.
The heated circulating air flow (second
After removing heat from arrow A) in the figure, it is exhausted to the outside of the main body 1.

According to the present invention, the drying air circulation side blades 25 of the heat exchange fan 7 are bent forward with respect to the rotational direction of the heat exchange fan 7, thereby increasing the air blowing capacity, that is, heating It is possible to improve the blowing efficiency of circulating air and, by extension, the heat exchange efficiency, and the cooling side blades 26 of the heat exchange fan 7 are curved backward with respect to the rotation direction of the heat exchange fan 7. By doing so, it is possible to reduce the noise of the clothes dryer as a whole. To explain this in more detail, heat exchange fan 7
Although it is desirable for the heat exchange fan 7 to have a large air blowing capacity, in general, when the air blowing capacity of the heat exchange fan 7 is increased, the noise thereof also increases in proportion to the air blowing capacity. The noise is largely influenced by the flow of air on the cooling side. The reason for this is that the back plate 20 that covers the rear surface of the main body 1 has a cooling side intake port 13 that draws outside air into the heat exchange fan 7, and a cooling side exhaust port 19 that exhausts the cooling outside air after heat exchange to the outside of the main body 1. is formed, and when the flow of cooling side air increases, the cooling side intake port 13 and the cooling side exhaust port 1
The amount of air passing through the windshield 9 increases, and the noise also increases due to the wind noise. On the other hand, since the circulating air flows in a circular manner as shown by arrow A in FIG. 2, it has less influence on noise than the cooling air flow. However, in the present invention, compared to conventional dryers of this type, the circulation side blade 25 can be moved forward with respect to the rotational direction of the heat exchange fan 7 without adding any special parts or members. The air blowing capacity of the heat exchange fan 7 can be increased by simply bending the cooling side blade 26, and by simply bending the cooling side blade 26 backward with respect to the rotation direction of the heat exchange fan 7. With this simple configuration, the air blowing capacity of the heat exchange fan 7 can be suppressed, and the noise of the clothes dryer as a whole can be reduced.

In order to make the effects of the present invention even more remarkable, it is preferable to set the diameter D of the circulation side blade 25 and the diameter d of the cooling side blade 26 so that D>d as shown in FIG. That is,
Since the air blowing capacity of the heat exchange fan 7 increases in proportion to the blade diameter, the diameter D of the circulation side blades 25 is increased as described above, and the diameter d of the cooling side blades 26 is increased as described above. By making the diameter smaller than the diameter D, the air blowing capacity of the heat exchange fan 7 can be further increased, and the wind noise on the cooling side can be reduced, making the noise reduction even more effective. can.

In addition, according to the present invention, as shown in FIG. 3, by slanting the tip of the cooling side blade 26 to form a blade slope 28, the wind noise on the cooling side can also be reduced. I can do it.

By the way, in FIG. 1a, FIG. 1b, and FIG. 3, the fan blade 21, the circulation side blade 2
5. In order to make it easier to understand the configuration of each blade, only one cooling side blade 26 is shown as an example, but a plurality of blades may be formed in the circumferential direction of the heat exchange fan 7. Of course there are.

〔Effect of the invention〕

The present invention is as described above, and as is clear from the explanation of the illustrated embodiments, according to the present invention, it is possible to increase the blowing capacity, that is, to improve the blowing efficiency of heated circulating air, and furthermore to improve the heat exchange efficiency. It is possible to provide an improved clothes dryer that can simultaneously satisfy the contradictory effects of noise reduction.

[Brief explanation of the drawing]

The drawings show an embodiment of the clothes dryer according to the present invention, FIG. 1a is a view taken in the X direction of FIG. 3, which shows the main part of the present invention, and FIG. 3 is a view taken in the Y direction, FIG. 2 is a longitudinal side view showing the overall structure of the clothes dryer, and FIG. 3 is a partially enlarged view of FIG. 2. 1...Dryer main body, 2...Rotating drum, 5...
Clothes input port, 6... Heater, 7... Heat exchange fan, 21... Fan blade, 25... Circulation side blade, 26... Cooling side blade.

Claims (1)

[Scope of Claims] 1. A dryer main body having a clothes input port, a rotating drum attached to the dryer main body and accommodating clothes, a heater heating drying air flowing into the rotating drum, and a rotating drum. A clothes dryer that is located at the rear of the dryer and has a blower function for circulating drying air through a rotating drum, and a heat exchange fan that has a heat exchange function between the drying air and cooling air outside the dryer main body. The cooling side blade of the heat exchange fan is bent backward with respect to the rotation direction of the heat exchange fan, and the drying air circulation side blade of the heat exchange fan is bent with respect to the rotation direction of the heat exchange fan. A clothes dryer characterized by being curved forward. 2. A clothes dryer according to claim 1, wherein the diameter D of the circulation side blade and the diameter d of the cooling side blade are such that D>d. 3. A clothes dryer according to claim 2, wherein the tip of the cooling side blade is inclined to form a blade inclined portion.