JPS6331239B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drum-type clothes dryer, and is particularly aimed at improving drying performance.

A drum-type clothes dryer has a horizontally bearing drum for storing laundry, the drum is housed in an outer frame, and hot air is supplied into the drum to dry the laundry. The drum is rotated (rotation speed is approximately 45 rpm) to agitate the laundry, and at the same time, outside air that has been made hot by a heater is drawn into the drum using a fan to dry the laundry and remove moisture that has evaporated from the laundry. The humid air contained therein is discharged from the drum to the outside of the machine by the fan.

By the way, in conventional drum-type clothes dryers, as will be explained in detail later, hot air is blown into the drum from a ring-shaped hot air outlet formed along the outside of the laundry intake opening. As a result, the blown hot air did not come into uniform contact with the laundry concentrated at the bottom of the drum.

In other words, hot air that enters from the bottom of the hot air outlet often hits the laundry, whereas hot air that enters from the top of the drum passes through the space above the drum and is discharged as is without coming into contact with the laundry. will be done. Furthermore, since the lower part of the drum has greater air resistance due to the laundry than the upper part, the amount of air passing through the upper part of the drum increases.

In this way, in conventional drum-type clothes dryers, a large proportion of the hot air blown into the drum from the hot air outlet passes through the drum without making good contact with the laundry, which reduces the drying time. The drawback was that it was long.

The present invention eliminates the drawbacks of the prior art described above, and provides a clothes dryer that allows hot air to flow into a place where clothes gather in a drum, improves contact between the hot air and clothes, and improves drying performance. This is the purpose.

The present invention is characterized in that a drum, which is a drying container for storing laundry, is horizontally supported, and hot air is guided into the drum from a ring-shaped hot air outlet formed along the outside of the laundry intake opening. A drum-type clothes dryer that dries the laundry and forcibly discharges humid air containing water that has evaporated from the laundry using a fan, uses a ring-shaped hot air blower. At the outlet, there is an arc-shaped opening of an arbitrary length below the center of rotation of the drum.
The drum-type clothes dryer is provided with an air inlet for blowing hot air directly into the drum from the drum, and a shielding plate for shielding the hot air outlet in other parts.

More details are as follows.

In order to efficiently dry laundry, it is necessary to blow hot air into the position in the drum where laundry is always concentrated, that is, at the bottom of the drum.The present invention is based on this idea. The ring-shaped hot air outlet is made up of the front plate of the drum and the laundry intake port, and the upper part of the drum is closed, and the outlet is located below the center of rotation of the drum. An open shielding portion is provided.

The present invention will be explained below with reference to the figures.

First, a conventional example will be explained in more detail with reference to FIGS. 1 and 2.

FIG. 1 is a longitudinal sectional view of a conventional drum-type clothes dryer, and FIG. 2 is a view taken along arrows A ₁ -A ₂ in FIG.

In FIG. 1, reference numeral 1 denotes an outer frame which is an exterior part, and an inlet port 2 for loading laundry 6 is provided at the center of the front surface of the outer frame. Reference numeral 3 denotes a lid provided with a butterfly over the laundry intake opening 2, and as shown in FIG. The inner edge 4 of the lid is in close contact with the outlet 2. Reference numeral 5 denotes a drum that is horizontally supported and housed within the outer frame 1, and serves as a drying container for storing laundry 6. 5a is a front side plate of the drum 5, 5b is a drum shaft part provided at the center of the front side plate 5a, and this drum shaft part 5b is connected to the shaft part of the drum 5 and the laundry 6 to the drum 5. It also serves as an inlet for hot air and an inlet for hot air. 5c
is a rear plate of the drum 5, and 5d is an exhaust port provided at the center of the rear plate 5c for discharging humid air containing evaporated water from the laundry 6. Reference numeral 7 indicates three or four lifters fixedly installed on the inner circumferential surface of the drum 5 at equal intervals, and these lifters 7 agitate the laundry 6 when the drum 1 rotates. 8 is outer frame 1
This duct is fixedly installed on the inner front surface of the drum 5 and guides hot air into the drum 5.
A heater 27 serving as a heat source for drying is housed near an air suction port 10a provided on one duct plate 10. 10b
is a drum bearing part formed integrally with the duct plate 10, and the drum shaft part of the drum 5 is supported by a bearing material 10c (for example, a ring-shaped member made of felt or polyacetal resin) fixed to the inner surface of the drum bearing part 10b. 5b. 11
is a ring-shaped hot air outlet that opens along the outside of the laundry intake port 2. 12 is a bearing plate fastened to the rear side of the outer frame 1; 13 is a fan casing fixed to the bearing plate 12; a bearing cylinder portion 14 is provided in the center of the fan casing 13; A suction port 15 for sucking air from the drum 5 is formed in the outer circumferential portion of the bearing cylinder portion 14 . Reference numeral 16 denotes a drum shaft fitted into a drum flange 17 fixed to the center portion of the rear side plate 5c of the drum 5.
The drum 5 is supported by a bearing 18 contained in the drum 5.
is supported. Reference numeral 19 denotes a protective cover for the laundry 6 that is detachably attached to the drum shaft 16 protruding inside the drum 5, and the entire surface of the protective cover 19 is in the form of a lattice. 20 is a protective cover 19
This is a net-like filter that is attached to the washing machine to catch cloth waste generated from the laundry 6 during the drying operation.
21 is a felt ring for airtightness that is fixed to the fan casing 13 and whose other end is in pressure contact with the rear plate 5c of the drum 5. Reference numeral 22 denotes a fan shaft that is integrally press-fitted into the bearing cylinder portion 14, and a fan 23 is rotatably attached around this fan shaft 22. 24 is a pulley molded integrally with the fan 23, and 25 is a bearing press-fitted into the boss portion of the fan 23. 26 is an exhaust port.
Reference numeral 28 denotes an electric motor for driving the drum 5 and the fan 23, and a pulley 29 for driving the drum 5 and a pulley 30 for driving the fan are fastened to the shaft end of the electric motor 28. 31 is a drum driving belt, and 32 is a fan driving belt. 3
Reference numeral 3 designates a back cover, and 33a designates a number of open air intake ports provided at the bottom of the back cover 33.

The drying operation of the conventional drum-type clothes dryer configured as described above will be explained.

First, the laundry 6 is placed into the drum 5 from the intake port 2.
is turned on, the lid 3 is closed, and the electric motor 28 and heater 27 are energized. The drum 5 rotates to agitate the laundry 6 within the drum 5, while the fan 23 also rotates. As the fan 23 rotates, outside air is guided into the outer frame 1 from the intake port 33a of the back cover 33, and the intake port 1
The hot air enters the duct 8 from 0a, is turned into hot air by the heater 27, and is blown into the drum 5 through the annular hot air outlet 11. The blown hot air becomes moist air containing moisture evaporated from the laundry 6 within the drum 5, and is discharged to the outside of the outer frame 1 from the exhaust port 26 by the fan 23. In this way, the laundry 6 is dried.

In the conventional drum-type clothes dryer described above, as described above, hot air is blown into the drum 5 through the annular hot air outlet 11 that opens along the outer periphery of the laundry 6 intake port 2. Since the washing is carried out from the beginning, the laundry 6 is not evenly hit. for example,
The hot air that enters from arrow P shown in FIG. There was a drawback that the amount of heat supplied in step 27 was not efficiently spent on drying, resulting in a long drying time.

FIG. 3 is a longitudinal cross-sectional view of a drum-type clothes dryer according to an embodiment of the present invention, and FIG.
B ₁ - B ₂ arrow view.

In FIG. 3, parts with the same numbers as in FIG. 1 are the same parts. 34 is an annular hot air outlet 11A, and is provided with an inlet 35 that opens in an arc shape by an arbitrary length below the center of rotation of the drum 5 and blows hot air directly into the drum 5 from there. However, the other part is a shielding flat plate provided integrally with the duct plate 10, which shields the hot air outlet 11A.

In the drum-type clothes dryer of this embodiment configured as described above, the outside air made into hot air by the heater 27 is concentrated on the laundry 6 of the drum 5 through the air inlet 35 located below the rotation center of the drum 5. Since the hot air is blown to a location where the hot air is concentrated, the blown hot air comes into uniform contact with the laundry 6.

Comparing the drying performance of the drum-type clothes dryer of this embodiment with the conventional machine, the relative humidity of the humid air discharged from the exhaust port 26 during the constant rate drying period in the drying process is lower than that of the conventional one. While the drying time was about 70% in the drying machine, the drying time in this example was as high as 90%, and as a result, the drying time was shortened by about 10%.

In this embodiment, the shielding flat plate 34 that shields the annular hot air outlet 11A is provided integrally with the duct plate 10, but an air outlet separate from the duct plate 10 is provided in this part. An open shielding plate may be installed.

According to the embodiment described above, since the hot air blowing port 35 to the drum 5 is provided in the portion facing the bottom of the drum where the laundry 6 is always concentrated inside the drum 5, efficient drying can be carried out. At the same time, of the annular hot air outlet 11A along the outer periphery of the laundry 6 intake port 2, a portion located above the drum is shielded by a shielding portion 34, and the aforementioned blower opening is provided in the shielding portion 34. Since the structure is simple in that only 35 is provided, there is an advantage that the cost does not increase.

As described above in detail, the present invention has the following effects.

○B Hot air is blown into the drum from the air outlet located below the center of rotation of the drum, so it makes good contact with the laundry and improves drying efficiency.

○B The structure of the drum-type clothes dryer is simple because it is only necessary to attach a shielding plate with an air inlet perforated to the ring-shaped hot air outlet.

○C Since the air inlets opening in an arc shape are drilled in the shielding flat plate, in order to obtain the required opening area, the opening area is smaller than, for example, when the air holes are drilled in a distributed manner. It is possible to reduce the center angle of the drum with respect to the center of the drum, allowing the hot air to come into intensive contact with the laundry, and also reducing the diameter of the drum bearing outside the hot air outlet. In this case, the circumferential length that must be kept airtight is shortened, and the amount of hot air leaking out of the drum is extremely small.

○D Unlike the case where air is blown into the air from the air outlet, the area of the air outlet is large, so the ventilation resistance is small, and therefore the power of the fan is small, and the noise is low.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of a conventional drum-type clothes dryer, Fig. 2 is a view taken along arrow A ₁ - A ₁ in Fig. 1,
FIG. 3 is a longitudinal cross-sectional view of a drum-type clothes dryer according to an embodiment of the present invention, and FIG.
B ₁ - B ₂ arrow view. 2...Intake port, 5...Drum, 6...Laundry, 11
A...hot air outlet, 23...fan, 34...shielding part, 35...inlet.

Claims (1)

[Claims] 1 A drum serving as a drying container for storing laundry is horizontally supported, and hot air is guided into the drum from a ring-shaped hot air outlet formed along the outside of the laundry intake opening to dry the laundry. In a drum-type clothes dryer that dries the laundry by forcibly discharging the moist air containing moisture that has evaporated from the laundry using a fan, a ring-shaped hot air outlet is connected to the drum. An inlet is opened in an arc shape by an arbitrary length below the center of rotation, from which hot air is blown directly into the drum, and a shielding flat plate is installed in other parts to shield the hot air outlet. A drum-type clothes dryer characterized by: