JPH03207398A - Clothing drying machine - Google Patents

Abstract

PURPOSE:To shorten a drying time by arranging a plurality of discharge holes through a drying air casing, thereby providing circulation paths to a drum independently. CONSTITUTION:A first circulating course communicated with a rotary drum 2 is composed of a first exhaust hole 24, a circulating duct 26, and a heater 27, and on the way of the circulating course, a drain hole 28 is set. Besides, a second circulating course communicated with the rotary drum 2 is composed of the second exhaust hole 29 of a drying air casing 25, a circulating duct 30, and a heater 31, and the drying air casing 25 is provided with a plurality of the drying air exhaust holes 24, 29 at asymmetric positions to the center of the rotation of a fan. Then, tongs 32, 33 for leading drying air to the respective exhaust holes 24, 29 are composed to be arranged at point-symmetrical positions. As a result, water flow path resistance is reduced, and an air quantity can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF APPLICATION IN INDUSTRIES The present invention relates to a dehumidifying type clothes dryer for use in general households.

Conventional technology Conventional examples are shown in FIGS. 4 and 5. FIG. 4 is a sectional view, and FIG. 5 shows a view of the drying air casing from the rotating drum side. In the figure, 1 is the main body of the dryer, 2
is a rotating drum rotatably provided in the main body 1 and driven by a motor 3 via a drum belt 4; 5 is a clothes input port provided on the front side of the main body 1; 6 is a drying drum that flows into the rotating drum 2; A heater that heats the air, 7 is a rotating drum 2
This is a heat exchange fan installed at the rear of the fan, which has air blowing and heat exchange functions, and is driven by a motor 3 via a fan belt 8. Reference numeral 9 denotes a drying air casing for the heat exchange fan 7, which is provided on the rear surface of the rotating drum 2 and has a rotating drum-side intake hole 10 in the center. 11 is a filter installed on the rear surface of the rotating drum 2 to remove threads m, etc.; 12 is a cooling air casing, which, like the drying air casing 9, has an intake hole 13 in the center. 14 is a cooling air casing exhaust hole formed in a part of the cooling air casing l2; 16 is a heat exchange fan 7 and a rotating drum 2;
The shaft rotatably supports the drying air casing l2.
is fixed to a retaining plate 17 which is fixed to the main body 1.

Reference numeral 18 denotes a partition plate interposed between the drying air casing 9 and the cooling air casing 12, which airtightly separates the drying side and the cooling side from side to side with the outer periphery of the heat exchange fan 7 via felt. ing. Reference numeral 20 denotes a circulation duct, which functions as a ventilation path for guiding drying air from an exhaust hole 19 provided in the drying air casing 9 to the heater 6. Reference numeral 21 denotes a drainage hole provided in the middle of the circulation duct 20, through which condensed water produced by heat exchange in the heat exchange fan 7 is discharged. 22
is a back plate that covers the rear surface of the main body 1, and has an intake hole 23 in a part thereof for intake of cooling air. Note that arrow A indicates the flow of cooling air, and arrow B indicates the flow of drying air.

In the dryer described above, when the motor 3 rotates, the rotating drum 2 containing clothes and the heat exchange fan 7 rotate, creating an air flow AB. The drying air B is supplied by heater 6.
As a result, the clothes in the rotating drum 2 are heated and dried, resulting in high temperature and humidity, which is circulated to the heat exchange fan 7. On the other hand, the outside air, which is the cooling air A, is taken in through the intake hole 23 provided in the back plate 22, and is passed through the casing exhaust hole 14 of the cooling air casing 12 through the main body side exhaust hole 15 provided in the main body 1.
is exhausted to the outside through. The circulated hot and humid drying air comes into contact with the heat exchange fan 7, is cooled and dehumidified by the cooling air, and is circulated into the rotating drum 2 again. This is how the clothes are dried.

Problems to be Solved by the Invention If the clothes dryer has a 200V specification, the heater input per unit time can be increased, and the drying time can be significantly shortened. However, in the conventional configuration, if the heater is set to 200V, the heater output is 100V.
This is twice as much as the V specification, but if the conventional drying air volume remains unchanged, the air volume will be insufficient, resulting in an abnormally high temperature of the drying air. Generally, the temperature of drying air is set at about 55° C. or lower in order to protect clothes. Therefore, in order to set the heater to 200V specifications, it is necessary to increase the amount of drying air. In order to increase the air volume with the conventional configuration, (1
> Increase the rotation speed of the heat exchange fan (2) Increase the diameter of the heat exchange fan <3> Increase the height of the blades of the heat exchange fan. However, if the rotation speed is increased as a measure (1), a noise problem arises. Next, in the case of measure (2), the current heat exchange fan is almost at its maximum size that can be tolerated by the current housing, and if it is made larger than this, the dryer body will become larger. (3) can be used to some extent, but there is a limit due to the resin moldability of the heat exchange fan.As mentioned above, it is quite difficult to increase the volume of drying air by improving only the heat exchange fan in the conventional configuration. There are some difficulties.

The present invention aims to solve the above-mentioned problems of the conventional horizontal command, and improves the drying air casing and circulation path to increase the air volume of the drying air and increase the The primary purpose of this invention is to provide a clothes dryer that is compatible with specifications and allows shortening of drying time, as well as a high degree of freedom in designing the entire dryer. A second purpose is to provide a second means for achieving the first purpose.

Means to Solve the Problem The first means to achieve the first objective is the main body of the dryer,
A rotary drum rotatably installed inside this main body, a heat exchange fan with air blowing and heat exchange functions installed at the rear of the rotary drum, a drying air casing on one side of the heat exchange fan, and a drying air casing on the other side. The drying air casing has a plurality of drying air exhaust holes arranged symmetrically with respect to the center of rotation of the heat exchange fan. The tongs that guide air to each of these exhaust holes are arranged approximately point symmetrically, and independent circulation paths are provided from these exhaust holes to the rotating drum, and This is a clothes dryer with a heater installed inside.

The second means to achieve the second purpose is to use the main body of the dryer, a rotary drum rotatably installed inside the main body, and a heat exchanger with air blowing and heat exchange functions installed at the rear of the rotary drum. an exchange fan, a drying air casing on one side of the heat exchange fan, a cooling air casing on the other side, and a motor for driving the rotating drum and the heat exchange fan;
The drying air casing is configured in multiple stages in the axial direction of the heat exchange fan, each of the multiple stages is provided with an independent exhaust hole, and each independent circulation path is provided from the exhaust hole to the rotating drum. The clothes dryer has a configuration in which heaters are provided in each of these paths.

The first means of action is to have a casing structure with a large air volume, reduce the flow path resistance of the drying air circulation path, and easily increase the drying air flow rate. Even if the positions of the exhaust holes in the casing are not symmetrical with respect to the rotation center of the heat exchange fan, it is possible to achieve a uniform air volume. Furthermore, the second means has a structure having a plurality of stages of casing, so that the same effect as that of the first means can be realized with a simpler structure.

EXAMPLE Below, an example of the first means will be described based on FIGS. 1 and 2. In the figure, 24 is the drying air casing 2.
This first exhaust hole 24 , the circulation duct 26 , and the heater 27 constitute a first circulation path leading to the rotating drum 2 . 28 is a drainage hole provided in the middle of this circulation path. 29 is drying air casing 2
The second exhaust hole 29, the circulation duct 30, and the heater 31 constitute a second circulation path leading to the rotating drum 2. The drying air casing 25 has a plurality of, in this embodiment, two drying air exhaust holes 24 and 2.
9 is provided at an asymmetrical position with respect to the rotation center of the fan, as shown in FIG.

Tongs 32 and 33 for guiding the drying air to the respective exhaust holes 24 and 29 are arranged at point-symmetrical positions. Note that in FIGS. 1 and 2, the same members as those in the conventional example shown in FIG. 4 are given the same reference numerals, and explanations thereof are omitted.

The operation of this embodiment will be explained below. When the motor 3 rotates, the rotating drum 2 containing clothes and the heat exchange fan 7 rotate. At this time, the drying air taken in from the center of the heat exchange fan 7 is divided into C1 exhausted from the first exhaust hole 24 and C2 exhausted from the second exhaust hole 29. C1 is the amount of air exhausted from between the tongues 33 and 32, and C2 is the amount of air exhausted from between the tongues 32 and 32. That is, the air volume is determined by the circumferential distance between the tongues, and in this embodiment, the tongues 32 and 33 are arranged at positions symmetrical to the road points as described above. Therefore, the circumferential distance between the tongs is approximately the same, and even if the two exhaust holes are not arranged in point-symmetrical positions, the amount of air exhausted from each exhaust hole is equal. Furthermore, in this embodiment, since a circulation path is provided from each of the exhaust holes 24 and 29, the flow path resistance can be reduced compared to the conventional configuration, and the air volume can be increased.

That is, in the configuration of this embodiment, the drying air casing 25 is provided with two exhaust holes, and a circulation path is provided from each of the exhaust holes 24 and 29, so that a casing with a large air volume can be realized. As a result, circulation duct 26.3
0 can be disposed at any position, allowing flexibility in the design of the entire dryer.

Hereinafter, the function of the drying air is the same as in the conventional example, and the drying air containing moisture coming out of the clothes is dehumidified by the heat exchange fan 7, and the condensed moisture is drained from the drain hole 28. On the other hand, since the cooling air is exactly the same as in the conventional example, a description thereof will be omitted. Note that in this embodiment, the second circulation duct 3o is not provided with a drain port for condensed moisture;
This is because the water is dehumidified, condenses into moisture, and falls downward, so that water can be drained through the drain hole 28 provided in the first circulation duct 26.

As a result of an experiment in this embodiment, the RM of the conventional configuration was about 1.1 dl, whereas the air volume was about 1.6 dl, which was an increase of about 50 airflows.

Therefore, if the temperature of the drying air is maintained as before, the heater output can be increased by about 50%.

Thus, it can be seen that the configuration of this example is very effective as a measure to increase the air volume for the 200 V specification. In addition, in order to double the air volume in order to take out the heater output (heat amount) to the limit with the 200V specification, based on this example, increase the rotation speed, diameter, and blade height of the heat exchange fan 7 described above. This can be easily realized by combining the following.

Furthermore, with this configuration, drying air is distributed through each circulation duct 2.
Since it is possible to send an equal amount of air to the circulation ducts 26 and 30, it is possible to use standard parts with the same ventilation cross-sectional size or heater capacity of each of the circulation ducts 26 and 30.

Next, an embodiment of the second means will be described based on FIG. 3. In FIG. 3, 34 is a first casing for dry air, and 35 is an exhaust hole provided in this first casing 34, which is connected to the first circulation duct 26. Similarly, 36 is a second casing for dry air, and 37 is an exhaust hole provided in this second casing 36, which is connected to the second circulation duct 30. As can be seen from this figure, in this embodiment, the drying air casing is constructed in a plurality of stages (two stages in this embodiment) in the axial direction of the heat exchange fan 7, and each stage is independent.

The configuration of this embodiment is as described above. In FIG. 3, the same members as those in the conventional example shown in FIG. 4 and the embodiment of the first means shown in FIGS.

The operation will be explained below. First, as the heat exchange fan 7 rotates, drying air taken in from the center of the heat exchange fan 7 is discharged from the outer periphery of the heat exchange fan 7 to the casing. At this time, in this embodiment, first and second casings 34 for dry air are arranged in two stages in the axial direction of the heat exchange fan 7.
36, the drying air taken in by the heat exchange fan 7 is directed to the first casing 34 (the flow is directed by arrow D).
The flow is divided into the second casing 36 (the flow is shown by arrow D2) and enters the drum 2 through the circulation ducts 26 and 3o and the heaters 27 and 31 from the exhaust holes 35 and 37 of each casing. . The volume of drying air divided here is naturally determined by the thickness of the first and second casings. Therefore, it is easy to divide the flow evenly. The following is the same as the first means and the conventional example, so the description thereof will be omitted.

As described above, in this embodiment as well, the same effects as those of the first means described above can be obtained, and the explanation thereof will be omitted. In this embodiment, there is no need to provide tongs in the drying air casing, and the same effect can be obtained with a simpler structure than the first method.

Effects of the Invention According to the first means, a plurality of drying air casing exhaust holes are provided, each having an independent circulation path to the drum, thereby easily increasing the amount of drying air. In addition, it is possible to evenly distribute the drying air without having to arrange the exhaust holes of the drying air casing in a point symmetrical position with respect to the center of rotation of the heat exchange fan, which improves circulation. It is possible to freely set the position of the duct, increasing the degree of freedom in designing the dryer, and it can be said to be practical, effective, and valuable.

The second method is to configure the drying air casing into multiple stages in the axial direction of the heat exchange fan, provide independent exhaust holes in the casings of each of the multiple stages, and connect each rotating drum independently from the exhaust holes. By providing a clothes dryer with such circulation paths and a heater provided in each of these paths, the same effect can be achieved with a simpler structure than the first method.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a clothes dryer which is an embodiment of the first means, Fig. 2 is a plan view showing the drying air casing, and Fig. 3 is a clothes dryer which is an embodiment of the second means. FIG. 4 is a cross-sectional view of a conventional clothes dryer, and FIG. 5 is a plan view of the drying air casing. 24...first exhaust hole of drying air casing, 25
... Drying air casing, 26... First circulation duct, 27... First heater, 29... Second exhaust hole of drying air casing, 30... Second circulation Duct, 31...Second heater, 32, 33...Tongs, 34...First casing for dry air, 35...
Exhaust hole of first casing, 36... Second casing for dry air, 37... Exhaust hole of second casing.

Claims (2)

[Claims] (1) The main body of the dryer, a rotating drum rotatably installed inside the main body, a heat exchange fan with air blowing and heat exchange functions installed at the rear of the rotating drum, and one side of the heat exchange fan. It has a drying air casing, a cooling air casing on the other side, and a motor that drives the rotating drum and the heat exchange fan, and the drying air casing has a plurality of drying air exhaust holes connected to the heat exchanger. The tongues are provided at positions that are not symmetrical with respect to the center of rotation of the replacement fan, and the positions of the tongues that guide air to each of these exhaust holes are approximately symmetrical, and independent circulation paths are provided from the exhaust holes to the rotating drum. A clothes dryer having a configuration in which a heater is provided in each of these paths. (2) The main body of the dryer, a rotary drum rotatably installed inside the main body, a heat exchange fan with air blowing and heat exchange functions installed at the rear of the rotary drum, and one side of the heat exchange fan. It has a drying air casing, a cooling air casing on the other side, and a motor for driving the rotating drum and the heat exchange fan, and the drying air casing is arranged in multiple stages in the axial direction of the heat exchange fan. A clothes dryer having a configuration in which exhaust holes are provided independently in the casings of each of the plurality of stages, independent circulation paths are provided from the exhaust holes to the rotating drum, and a heater is provided in each of these paths. .