JPS5951317B2 - dehumidifying dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dehumidifying dryer that blows hot air heated by a heating element into a rotating drum, dries objects to be dried with the hot air, and dehumidifies the dried air by passing it through a heat exchanger. Specifically, this invention relates to improving the hot air circulation path to improve airtightness.

This type of dehumidifying dryer has a rotating drum rotatably arranged inside an outer frame, a heating element is installed in front of the drum air intake path, and a fan installed on the rear wall of the drum is operated to exhaust the dry air. This removes moisture from the circulating air by feeding it into a heat exchanger and removing it.

In a conventional dehumidifying dryer, as shown in FIG.
' The hot air heated by ' is circulated in the direction of arrow A, and while passing through the pipe 25' of the heat exchanger 22', heat is exchanged and water droplets are taken out. What is particularly required here is the circulation. This is to reduce air leakage in the route and prevent steam from condensing inside the machine.

The problem with the conventional structure is the airtightness from the heating wind cylinder 20' to the air intake into the drum 3'.

In the conventional example described above, the drum is rotatably supported and sealed on the flange surface of the front input portion of the drum, and is sealed on the outer peripheral surface of the drum front surface, and a large number of intake holes are provided on the outer peripheral surface of the drum front surface to suck in hot air.

A bearing is installed on the front flange of the drum, and it is necessary to seal this area.In addition, it is also necessary to seal the front of the drum and the heating air cylinder, which makes it necessary to increase the torque of the motor. Furthermore, it is extremely difficult to improve airtightness during manufacturing.

The present invention provides a dryer that is extremely suitable for satisfying the above-mentioned needs, and examples thereof will be described below.

In the figure, 1 is the main body of the dryer, which has a cold air intake hole 2a in the center of the lower surface of the main body 1, and a cold air outlet 2a on the left side of the lower surface.
b are formed respectively.

Reference numeral 3 denotes a rotating drum that accommodates the material to be dried, and the front wall of this drum 3 is divided into an inner wall fixing part 5 and an outer wall rotating part 6, and the inner wall fixing part 5 is fixed to the main body 1 via a mounting bracket 7. The outer peripheral surface rotatably supports the outer wall rotating portion 6 by supporting the inner peripheral surface thereof via a seal 8, and a plurality of intake holes 9 are provided in the lower part.

On the other hand, a large number of hot air exhaust ports 10 are provided on the rear wall surface of the drum 3.

Reference numeral 11 denotes a fan case with a built-in fan 12, and an intake port of a fan wind body 14 is closely connected to a tip opening 13 of this case 11.

A shaft 15 fixed to the rear wall surface of the drum 3 is rotatably supported by a bearing 16 fixed to the fan case 11.

In addition, a filter 17 is provided in the recess provided on the rear wall surface of the drum 3.
And a filter cover 18 is removably attached.

Further, a sealing material 19 is bonded to the outer peripheral surface of the rear convex portion corresponding to the concave portion of the drum 3, and this sealing material 19 slides on the surface of the fan case 110 to maintain airtightness.

Reference numeral 20 denotes a heating air cylinder incorporating a heating element 21 such as an electric heater, and its upper end is connected to the inner wall fixing part 5 so as to cover the intake hole 9 of the inner wall fixing part 5 of the drum and maintain airtightness.

Reference numeral 22 denotes a heat exchanger, which is disposed between the lower end opening 23 of the fan wind barrel 14 and the lower end opening 24 of the heating wind barrel 20, and is tightly attached to both wind barrels by a sealing material to connect the outside air and the circulation path. Airtightness is maintained between the two.

25 is a pipe through which hot and humid air passes, and a radiation fin is provided on the surface of this pipe.

Further, the heat exchanger 22 is installed with the heating wind cylinder 20 side lowered so that moisture can easily flow out from the inside of the pipe 25.

20a is a discharge port connected to the lower end of the pipe 25.

In addition, a clothing inlet flange portion 2 formed on the front surface of the main body 1
6 and the opening flange portion 27 of the inner wall fixing portion 5, a packing 28 is disposed in close contact over the entire circumference.

FIG. 2 mainly shows a cooling path for cooling the heat exchanger 22. As shown in FIG.

In FIG. 2, reference numeral 29 denotes an electric motor. A flat pulley 30 is mounted on one shaft of the electric motor 29, and rotation is transmitted to the drum 3 via a flat belt 31.

Further, a driving boo 1J32 is provided on the other shaft, and a two-stage pulley 34 is interlocked with the drive boob 1J32 via a round belt 33, and rotation is transmitted to the fan 12 and a cold air fan belt 35.
The cold air fan pulley 36 is also interlocked via the cold air fan 3.
The rotation will be transmitted to 7.

To explain the operation in the above configuration, first, when the material to be dried is put into the drum 3 and a switch (not shown) is turned on, the electric motor 29 rotates and the drum 3, fan 12, and cold air fan start rotating at the same time. At the same time, the heating body 21 generates heat.

The air sucked into the drum 3 by the rotation of the fan 12 passes through the fan case 11, the fan wind body 14, the pipe of the heat exchanger 25, and is further heated by the heating element 24 to produce heated air. Heated air is fed into the drum 3 through the cylinder 20 and from the intake hole 9 of the inner wall fixing part 5.

This heated air circulates as indicated by arrow A in FIG.

As this circulation is promoted, the water content of the material to be dried evaporates, and the air within the circulation path becomes hot and humid.

When this hot and humid air passes through the pipe 25, which is cooled by normal temperature air sucked in from the cold air intake hole 2a provided on the bottom surface of the main body 1 by the cold air fan 37, it condenses as moisture on the inner wall of the pipe 25. do.

This dew water flows down inside the pipe 25 and drips into the drain port 20a.

In the above configuration, it should be noted that when air is drawn into the drum 3 by the fan 12, the air passes through the heating air cylinder 20 and enters the drum 3 from a place other than the intake hole 9 provided at the lower part of the front wall fixing part 5. This is to prevent it from being inhaled.

That is, if unheated air inside the dryer main body 1 is sucked into the drum 3 from other than the intake hole 9, the circulation temperature will drop, and the temperature of the material to be dried will drop, making it impossible to dry efficiently. At the same time, hot and humid air leaks outside the main unit, increasing the humidity inside the room.

However, according to the dehumidifying dryer of the present invention, the circulating air path that circulates inside and outside of the drum via the heated air cylinder that houses the heat exchanger and the heating element is airtightly fixed to the inner wall fixing part of the drum. Therefore, there are no sliding parts between the heating wind cylinder and the drum, and the number of sealing parts is reduced, making it possible to improve airtightness.

Therefore, it is possible to prevent the air inside the main body from being sucked into the Olam, and as a result, the temperature of the circulating air is not lowered, thus achieving efficient drying and ensuring that hot and humid air does not leak into the room. In addition, by providing an intake hole that sucks hot air only in a part of the circumference of the inner wall fixing part, the wind speed passing through this hole increases, and the cotton clumps generated during drying flow back and generate heat. It becomes difficult to accumulate in the body.

In addition, when hot air is blown onto the items to be dried that fall as the drum rotates, the air is blown to the areas most likely to be hit by the air, resulting in extremely high drying efficiency.

[Brief Description of the Drawings] Fig. 1 is a side sectional view of a clothes dryer showing an embodiment of the present invention, and Figs. 2 and 3 are sectional views from the back side of the dryer mainly showing the cold air path. , FIG. 4 is a side sectional view of a conventional clothes dryer. 1... Body, 3... Drum, 5...
...Inner wall fixed part, 6...Outer wall rotation part, 12.
...Fan, 20...Heating wind cylinder, 21.
... Heating element, 22 ... Heat exchanger.

Claims (1)

[Claims] 1 A drum rotatably disposed within the main body, a circulation path communicating between the inside and outside of this drum via a heat exchanger and a heating air cylinder with a heating element inside, and a circulation path provided to intersect with the heat exchanger. a cooling path, the front wall part of the drum is divided into an inner wall fixed part and an outer wall rotating part, and the space between the front opening flange part of the inner wall fixed part and the clothes input flange part on the front surface of the main body is airtight. At the same time, the inner circumferential portion of the outer wall rotating portion is rotatably supported in an airtight state by the outer circumferential portion of the inner wall fixing portion, and an intake hole is provided at the lower part of the inner wall fixing portion, and the intake hole is heated as described above. A dehumidifying dryer characterized in that the heating wind cylinder is connected to a circulation path via a wind cylinder and is airtightly fixed to the front wall fixing part.