JP3513939B2 - Clothes dryer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clothes dryer which circulates warm air in a rotary drum which is rotationally driven by a motor to dry clothes.

[0002]

2. Description of the Related Art Conventionally, a clothes dryer has been constructed as shown in FIG. The configuration will be described below.

As shown in the figure, the outer frame 1 is rotatably provided with a rotary drum 2 for accommodating clothes, stirring and drying them. The double-blade fan 3 exchanges heat between the cooling air 4 and the circulating air 5 and has an air blowing function, and is rotatably housed in the circulating fan case 6. The shaft 7 pivotally supports the rotary drum 2 and the double-blade fan 3. Motor 8
Drives the rotary drum 2 and the double-blade fan 3 to rotate. The back plate 9 covers the rear surface of the outer frame 1 and is provided with an intake / exhaust port 9x for intake / exhaust of the cooling air 4.

The circulation side fan case 6 is provided with a recessed portion for enclosing the two-blade fan 3 having a plurality of rings 3c having a tooth-shaped cross-section on the outer periphery, and as a seal for the circulating air 5, a vortex is swirled outward from the ring 3c of the both-wing fan 3. It forms the chamber 6d. The circulation side fan case 6 is provided with an intake hole 6a at a substantially central portion and a blowout port 6b at a substantially outer peripheral portion.

The cooling side fan case 10 is formed by the flange 6c extending on the circulation side fan case 6 and the back plate 9. The heater 11 is provided close to the air outlet 6b of the circulation side fan case 6. The rotary drum 2 is provided with an intake port 2a at a substantially central portion of a rear surface thereof and a plurality of blower ports 2b at an outer peripheral portion thereof so as to face the heater 11. Then, the wind tunnel 12a communicating with the air blow port 2b and the plurality of air blow holes 12 are provided.
A baffle 12 having b is fixed to the outer peripheral portion of the rotary drum 2. Further, a substantially cylindrical inner seal 13 is provided on the outer periphery of the intake hole 6a of the circulation fan case 6, and the heater 1
1, a substantially cylindrical outer seal 14 is provided on the outer periphery of the intake hole 6
a and the air outlet 6b are airtightly separated from each other.

In the above structure, when the motor 8 rotates, the rotary drum 2 and the both-wing fan 3 rotate. When the double-blade fan 3 rotates, cooling air 4 and circulating air 5 are generated, and the circulating air 5 reaches the circulating fan case 6 and is blown from the outlet 6b of the circulating fan case 6 through the heater 11 to the inner seal 13 and the outer side. It passes between the seal 14 and the blower port 2b of the rotary drum 2, reaches the blower hole 12b from the wind tunnel 12a of the baffle 12, is introduced into the rotary drum 2 to dry the clothes, and the intake port 2a of the rotary drum 2 is introduced. To form a flow of the intake hole 6a of the circulation side fan case 6 and the double-blade fan 3. On the other hand, the circulating wind 5 that has exchanged heat with the clothes and has become hot and humid becomes condensed water, and is drained to the outside of the outer frame 1 through the drain port 15.

[0007]

In such a conventional clothes dryer, since the outer seal 14 is made of only a non-woven fabric such as felt, the sealing performance is poor and the heater 11
Since the wind pressure of the circulating air 5 that has passed therethrough is higher than that in the outer frame 1, there is a problem that the circulating air 5 leaks out and the drying time is extended.

Further, the inner seal 13 and the outer seal 14 are fixed to the circulation side fan case 6 made of resin, and since the temperature becomes high during operation, the sealing performance of both seals deteriorates due to the thermal expansion of the resin, and the drying time becomes longer. There was a problem that it became long and the dehumidification performance deteriorates.

Further, since the fan case 6 is made of resin, there is a problem that the vicinity of the heater 11 is thermally deformed due to the high temperature and the desired performance cannot be secured.

The outlet 6b of the circulation side fan case 6 is also provided.
Has a configuration in which the partition plate 6e forms a curved wind tunnel and the circulating air 5 is introduced into the heater 11, but the partition plate 6e cannot be attached and removed from the rear side, and dust behind the heater 11 can be cleaned by a fan case. 6 and the rotary drum 2 have to be performed separately, and there has been a problem that the working time is very long.

Further, the cooling of the motor 8 is performed by forming the cooling hole 6f in the cooling side fan case 10. However, since the motor 8 is located in front of the cooling hole 6f, the cooling efficiency is poor and the motor 8 is cooled. There was a safety problem because the temperature rise of the winding increased.

The outlet 6b of the circulation side fan case 6 is also provided.
Since the number of heaters is one and the number of heaters 11 is also one, there is a limit to the input of the heater 11 and naturally there is a limit to the reduction of the drying time.

The outlet 6b of the circulation side fan case 6 is also provided.
Since the number of heaters is one and the number of heaters 11 is also one, the circulating air 5 is intensively applied to the blowing side of the heater 11 (particularly behind the rotary drum 2), and the temperature of the rear surface of the rotary drum 2 is increased. There was a problem such as a high burn and burns.

Further, the above-mentioned temperature rise is caused by the direct contact of hot air with the rear surface of the rotary drum 2.

Further, since the baffle 12 is attached by simply attaching the rear surface of the baffle 12 to the rear surface of the rotary drum 2, hot air leaks from the gap 2c through the heater 11 and does not hit the clothes. There is a problem that the air is taken in through the air intake port 2a on the rear surface of the No. 2 and the drying time is extended without contributing to the drying of the clothes.

Further, a belt 16 for driving the both-wing fan 6
Has formed a convex portion so that the back plate 9 does not come into contact with the belt 16, but the internal pressure of the cooling side fan case 11 of the cooling air 4 drops sharply at the convex portion, and the ring 3c of the double-bladed fan 3 causes There was a problem that the circulating air 5 leaked out, the drying time was extended, and the dehumidifying ability was lowered.

The present invention is intended to solve the above problems, and a first object thereof is to prevent leakage of circulating air from the outer seal.

Further, thermal deformation of the fan case of the resin plate is prevented, and the sealability between the inner seal and the outer seal is secured,
The second purpose is to ensure the drying performance.

A third object is to make it possible to clean the heater easily and in a short time.

A fourth object is to efficiently cool the motor by a simple method.

A fifth object of the present invention is to increase the input of the heater and the amount of circulating air to shorten the drying time and to realize the drying in which the clothes are prevented from being damaged.

A sixth object of the present invention is to achieve the above-mentioned fifth object, to realize more gentle drying of clothes, and to reduce the temperature of the rear surface of the rotary drum.

In addition to achieving the sixth object, the temperature of the rear surface of the rotary drum can be further reduced.
The purpose is.

An eighth object is to achieve the seventh object and to more efficiently reduce the temperature of the rear surface of the rotary drum.

A ninth object is to improve the drying efficiency by allowing hot air to efficiently hit the clothes from the baffle.

The tenth object is to achieve the dehumidification amount by a simpler method.

[0027]

In order to achieve the above first object, the present invention is rotatably disposed in an outer frame, has an intake port at a substantially central portion of a rear surface thereof, and has a plurality of blower ports. A rotary drum, a double-blade fan that exchanges heat between circulating air and cooling air and has a blowing function, a shaft that pivotally supports the rotary drum at the rear and a shaft that axially supports the double-blade fan, and an intake hole of the double-blade fan. A circulation side fan case having a substantially central portion and a blower outlet provided at a substantially outer peripheral portion, a heater provided near the blower outlet of the circulation side fan case, and a plurality of wind tunnels communicating with the blower port of the rotary drum. A baffle having individual air blow holes fixed to the outer peripheral portion of the rotating drum, a substantially cylindrical inner seal fixed to the outer peripheral surface of the intake hole provided in the substantially central portion of the circulation side fan case, and fixed to the outer peripheral portion of the heater. A substantially cylindrical shape And a side seal, and the air outlet of the circulation side fan case, the heater, the air outlet of the rotating drum, the air outlet of the baffle, the air inlet of the rotating drum, the air intake hole of the circulation side fan case, the air outlet of the circulation side fan case. the air flow in the circulation path with air-tightly formed, the outer side seal is composed of a nonwoven fabric such as felt having an inner flexibility,
The first problem-solving means is that the outer periphery has a two-layer structure of an elastic body such as rubber, the two are contact-separated, and the height of the elastic body is equal to or lower than the height of the nonwoven fabric.

In order to achieve the second object, the circulation side fan case of the first problem solving means is made of synthetic resin, and the shaft is attached to a substantially central portion of the circulation side fan case. It is fixed to a substantially circular shaft support plate having a mouth, and a substantially donut-shaped fan case mounting plate is fixed to the circulation side fan case as a heat shield plate between the inner seal and the outer seal containing the heater, and the shaft is A second problem solving means is that the inner seal is sandwiched between the support plate and the fan case mounting plate, and the outer seal is sandwiched and fixed between the fan case mounting plate and the cylindrical rib provided on the circulation side fan case.

Further, in order to achieve the third object, the air outlet of the circulation side fan case of the first problem solving means has a structure in which a curved wind tunnel is formed by a partition plate to introduce the circulating air to the heater. , A heater is arranged behind the partition plate,
The third problem solving means is that the partition plate is detachable.

In order to achieve the fourth object, in addition to the means for solving the first problem, a motor for rotating and driving a rotary drum and a double-blade fan is arranged at a corner portion in the outer frame, and a circulation side is provided. The fan case includes a vortex chamber composed of a first fan case formed by a partition plate of a double-bladed fan, a circulation wind tunnel, and a second fan case for fixing a heater, a shaft, an inner seal, and an outer seal. As a fourth problem solving means, the fan case and the second fan case form a substantially L-shaped cooling wind tunnel extending from the front-back direction of the outer frame for introducing a part of the cooling air into the motor to the vicinity of the motor. There is.

Further, in order to achieve the fifth object, the circulation side fan case of the first problem solving means is divided into a plurality of outlets, and a plurality of heaters are provided.
Is used as a means for solving the problem.

In order to achieve the sixth object, the air outlet of the circulation side fan case of the first problem solving means is provided in a plurality of divisions, and at least one circulation air outlet not passing through the heater is provided. This is the sixth means for solving the problem.

Further, in order to achieve the seventh object, in addition to the means for solving the first problem, a substantially donut-shaped cooling plate having a ventilation window corresponding to the ventilation port is provided on the rear surface of the rotary drum, and The seventh aspect of the present invention is that the cooling plate has a cylindrical inclined sealing surface of an inner seal and an outer seal, and is fixed by providing a space with the rear surface of the rotary drum.

In order to achieve the eighth object, the eighth problem solving means is to provide a plurality of cooling holes on the outer circumference of the cooling plate of the seventh problem solving means.

In order to achieve the ninth object, the baffle of the first means for solving the problems is formed of synthetic resin, and the introduction port of the baffle is projected rearward from the blower port on the rear surface of the drum. A ninth aspect of the present invention is to fix the blower window of the cooling plate, house the projection window in the projecting portion, and fix the rear surface of the drum and the cooling plate together with the baffle with screws.

Further, in order to achieve the tenth object, a substantially ring is formed on the outer circumference of the blade of the double-blade fan of the first means for solving the problems, and a plurality of cooling rings are provided on the cooling side fan case so as to correspond to the substantially rings. A ring-shaped recess with a comb-shaped cross section is provided to seal the circulating air, and a belt for driving the two-blade fan by a motor has a protrusion on the back plate, and the belt is provided on the cooling ring fan case on a substantially ring-shaped outer periphery. The tenth problem-solving means is to provide a pressure wall that is higher than other portions only in the vicinity.

[0037]

According to the first means for solving the problems of the present invention, the outer seal is pressed against the sealing surface of the rotary drum by an appropriate force by the elastic body, and this force is greater than that in the case of bonding the woven cloth and the elastic body. The force is extremely small, the sealing performance can be secured without increasing the rotating torque of the rotary drum, the leakage of the circulating air from the outer seal can be prevented, and the drying performance and dehumidification performance can be secured. it can.

Further, according to the second means for solving the problems, the thermal deformation of the circulation side fan case made of resin can be prevented by the fan case mounting plate which is a blocking plate, and the inner seal and the outer seal are fixed to each other by a mechanical mechanism. It can be secured by static fixation, and the desired dry and dehumidifying performance can be secured.

Further, according to the third means for solving the problems, when the heater is clogged with dust or the like, it is possible to easily clean the heater by removing the partition plate.

Further, by the fourth means for solving the problem, the cooling air can be efficiently applied to the motor to cool it, and the safety can be secured.

According to the fifth means for solving the problems, a large amount of heat energy can be supplied to the circulating air by providing a plurality of heaters, and the amount of the circulating air can be increased by providing a plurality of outlets. Therefore, the drying time can be shortened and the clothes can be prevented from being damaged.

Further, according to the sixth problem solving means, the hot air that has passed through the heater 11 and the hot air that does not pass through the heater are mixed and introduced into the baffle, so that the hot air temperature is lowered and the clothes can be dried easily. The temperature of the rear surface of the drum can be reduced.

Further, according to the seventh means for solving problems, the circulating wind does not directly hit the rear surface of the rotary drum but hits the cooling plate, so that the temperature of the rear surface of the drum can be reduced and the safety can be improved.

Further, according to the eighth means for solving problems, the temperature of the rear surface of the rotary drum can be further lowered by the cooling holes on the outer periphery of the cooling plate.

Further, according to the ninth means for solving the problems, the baffle made of resin can be fixed to the rear surface of the rotary drum formed of the iron plate, so that the baffle can be fixed securely and the hot air from the gap between the baffle and the rear surface of the drum can be secured. There is no leakage, and hot air can be efficiently applied to clothes.

Further, according to the tenth means for solving the problems, it is possible to prevent the circulating air from leaking from the double-blade fan and the cooling side fan case by the pressure wall, and it is possible to improve the drying / dehumidifying performance.

[0047]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG.
Description will be given with reference to (b). The same components as those of the conventional example will be described with the same reference numerals.

As shown in the drawing, a substantially cylindrical inner seal 13 is provided on the outer periphery of the intake hole 6a of the circulation side fan case 6,
A substantially cylindrical outer seal 16 is provided on the outer circumference of the heater 11, and the outer seal 16 is, as shown in FIG.
The inside is made of a non-woven fabric 16a such as felt having flexibility, and the outer periphery is made into a two-layer structure of an elastic body 16b such as rubber.
It is set to the same height or lower.

With the above structure, the outer seal 16 is pressed against the seal surface 2k of the rotary drum 2 by the elastic body 16b with an appropriate force f. This force f is applied to the woven cloth 16a and the elastic body 16
Compared with the case where b is bonded, the force is extremely small,
The sealability can be secured without increasing the rotation torque of the rotary drum 2. Further, even if the outer seal 16 spreads outward on the seal surface 2k of the rotating drum 2, the elastic body 16b is set lower than the non-woven fabric 16a, which is a sliding body, so that the elastic body 16b contacts the seal surface 2k. Without increasing the sliding resistance, it is possible to secure a very stable sealing property and prevent circulating air from leaking.

Next, a second embodiment of the present invention will be described with reference to FIGS. 1 and 2. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in the figure, the shaft 7 is fixed to a shaft support plate 17 having an intake hole 6a attached to the circulation side fan case 6 at a substantially central portion thereof. Also, the inner seal 1
An approximately donut-shaped fan case mounting plate 18 is fixed to the circulation side fan case 6 as a heat shield plate between the outer casing 3 and the outer seal 16.

Further, the inner seal 13 is sandwiched and fixed by the shaft support plate 17 and the fan case mounting plate 18. The outer seal 16 is sandwiched and fixed between the cylindrical rib 6s provided on the circulation side fan 6 and the fan case mounting plate 18.

With the above structure, the fan case mounting plate 18 as a blocking plate prevents thermal deformation of the circulation side fan case 6 made of resin, and the inner seal 13
The outer seal 16 is securely fixed by mechanical fixing, and the drying performance can be permanently secured.

Next, a third embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in the figure, the air outlet of the circulation side fan case 6 forms a curved wind tunnel with a partition plate 19 to introduce the circulating air 5 from the heater 11. In addition, the heater 11 is arranged behind the partition plate 19 and
When the two-bladed fan 3 is removed, it can be detached by removing the screw 20.

With the above structure, when the heater 11 is clogged with dust or the like, it can be cleaned by simply removing the partition plate 19.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 1, 3 and 4. In addition, the first
The components having the same configurations as those of the embodiment will be described with the same reference numerals.

As shown in the figure, a motor 8 is arranged in a corner portion of the outer frame 1, a circulation side fan case 6 is provided, and a vortex chamber is formed by a partition plate 19 of the double-bladed fan 3 to form a first fan case 6y. And a second fan case 6x for fixing the circulation wind tunnel, the heater 11, the shaft 7, the inner seal 13, and the outer seal 16. A hole 6yb is provided in the first fan case 6y, a rail 6xr is provided in the second fan case 6x, and the rails 6xr are combined to form a substantially L-shaped cooling wind tunnel 6o. I am going to introduce it to 8.

With the above structure, part of the cooling air 4 passes through the rail 6xr through the hole 6yb of the first fan case 6y and is guided to the core position A of the motor 8 as shown in FIG.

Next, a fifth embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in the figure, a plurality of outlets 6b of the circulation side fan case 6 are provided and a plurality of heaters 11 are provided.

With the above configuration, a plurality of heaters 11 are provided as compared with the case where one heater 11 is provided, so that more heat energy can be supplied to the circulating air 5. Further, by providing a plurality of outlets 6b, it is possible to increase the circulating air volume.

Next, a sixth embodiment will be described with reference to FIG. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in the figure, a plurality of air outlets 6b of the circulation side fan case 6 are provided, and the air outlet 3b2 has a structure in which circulating air 5-2 does not pass through the heater 11.

With the above structure, the hot air 5-1 passing through the heater 11 and the hot air 5-2 not passing through the heater 11 are mixed and introduced into the baffle 12, so that the heater 11
Hot air temperature is lower than that of

Next, a seventh embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in the figure, the rear surface 2 m of the rotary drum 2
A cooling plate 21 made of a substantially donut-shaped thin iron plate is provided through the rear surface 2m and the space l. Further, it has a blower window 21e corresponding to the blower port 2b of the rotary drum 2 and has a cylindrical sealing surface 21f of the inner seal 13 and the outer seal 16,
21g is provided.

With the above structure, the circulating air 5 passing through the heater 11 hits the surface of the cooling plate 21 which rotates together with the rotating drum 2, and is introduced into the baffle 12 from the air blowing window 21e through the air blowing port 2b of the rotating drum 2. In this configuration, the circulating wind 5 does not directly hit the rear surface 2m of the rotary drum 2 but hits the cooling plate 21.

Next, an eighth embodiment of the present invention will be described with reference to FIGS. 1, 7 and 8. In addition, the first
The components having the same configurations as those of the embodiment will be described with the same reference numerals.

As shown in the figure, a plurality of cooling holes 21h are provided on the outer circumference of the cooling plate 21.

With the above structure, when the rotary drum 2 rotates, the air 22 inside the machine is introduced into the cooling holes 21h of the cooling plate 21, and the rear surface 2m of the rotary drum 2 is cooled by the air 22. With this configuration, the cooling performance of the cooling plate 21 of the seventh embodiment is further improved, and the temperature of the rear surface 2m of the rotary drum 2 is lowered, resulting in excellent safety.

Next, a ninth embodiment of the present invention will be described with reference to FIGS. 1 and 9. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in the figure, the inlet 12c of the baffle 12 made of resin is fixed to the rotary drum 2 made of an iron plate so as to protrude from the blower port 2b of the rear surface 2m of the rotary drum 2. And the ventilation window 2 of the cooling plate 21
1e is housed in the protruding portion 12d, and the rear surface 2m of the rotary drum 2 and the cooling plate 21 are fastened to the baffle 12 with the screw 22.

With the above structure, the baffle 12 made of resin is fixed to the rear surface 2m of the rotary drum 2 made of an iron plate, so that the baffle 12 can be stably fixed. Further, by providing the protrusion 12d, the leakage of the circulating air 5 from the gap B between the baffle 12 and the rear surface 2m of the rotary drum 2 and the cooling plate 21 can be minimized, and the hot air can be efficiently applied to the clothes. You can

Next, a tenth embodiment of the present invention is shown in FIG.
This will be described with reference to FIGS. 10 and 11. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in the figure, a substantially ring 3c is provided on the outer periphery of the double-blade fan 3, and the cooling side fan case 10 has a plurality of substantially ring-shaped recesses 11d corresponding to the substantially ring 3c. Is provided. Further, the back plate 9 is formed with a convex portion 9a for accommodating the belt 16 for driving the double-blade fan 3. A pressure wall 11e is formed on the outer periphery of the substantially ring-shaped recess 11d of the cooling side fan case 11 only in the vicinity of the belt 16 and higher than the other portions. This pressure wall 11e
May be formed in a rib shape with resin, or may be formed by attaching felt or the like.

When the double-blade fan 3 rotates in the above structure, the circulating air 5 and the cooling air 4 are generated, but the internal pressure P on the circulating side is generated.
When 1 is higher than the internal pressure P2 on the cooling side (P1> P2), the circulating air 5 leaks from the seal portion G. In the above configuration, P1> P2 because of the convex portion 9a of the back plate 9,
A pressure wall 11e is provided. With this pressure wall 11e,
Since P1 ≠ P2, mutual air leakage can be prevented, and the dry and dehumidifying performance can be improved.

[0078]

As described above, according to the present invention, the substantially cylindrical inner seal fixed to the outer periphery of the intake hole provided in the substantially central portion of the circulation side fan case and the substantially cylindrical outer seal fixed to the outer periphery of the heater. Equipped with a seal, the air outlet of the circulation fan case, the heater, the air outlet of the rotating drum, the air hole of the baffle, the air inlet of the rotating drum, the air intake hole of the circulation fan case, the air passage of the air outlet of the circulation fan case. to form the air flow hermetically, outer side seal is composed of a nonwoven fabric such as felt having an inner flexibility, the outer periphery and a two-layer structure of an elastic body such as rubber, and contacts separate them and the elastic member Since the height of is equal to or lower than the height of the non-woven fabric, leakage of circulating air from the outer seal can be prevented and the drying performance and dehumidification performance can be secured without increasing the rotation torque of the rotary drum.

The circulation side fan case is made of synthetic resin, and the shaft is fixed to a substantially circular shaft support plate having an intake port attached to a substantially central portion of the circulation side fan case. A substantially donut-shaped fan case mounting plate is fixed to the circulation side fan case as a heat shield between the seal and the outer seal, and the inner seal is sandwiched between the shaft support plate and the fan case mounting plate and the fan case is mounted. Since the outer seal is sandwiched and fixed between the plate and the cylindrical rib provided on the circulation side fan case, it is possible to prevent thermal deformation of the circulation side fan case made of resin, and mechanically fix each seal. The stability can be achieved, and the dry and dehumidifying performance can be permanently secured.

Further, the outlet of the circulation side fan case is constructed such that a partition plate forms a curved wind tunnel to introduce the circulating air to the heater. A heater is arranged behind the partition plate, and the partition plate is attached and detached. Since it is flexible, the serviceability of the heater can be improved.

Further, a rotary drum and a motor for rotating and driving a double-blade fan are arranged in a corner portion in the outer frame, and the circulation side fan case is a first fan case in which the vortex chamber is formed by a partition plate of the double-blade fan. And a circulation wind tunnel and a second fan case for fixing the heater, the shaft, the inner seal, and the outer seal, and an outer part for introducing a part of the cooling air into the motor by the first fan case and the second fan case. Since a substantially L-shaped cooling wind tunnel extending from the front-rear direction of the frame to the vicinity of the motor is formed, the motor can be efficiently cooled and safety can be improved.

Further, since the air outlet of the circulation side fan case is divided into a plurality of parts and a plurality of heaters are provided, a large amount of thermal energy can be supplied to the circulating air.
The amount of circulating air can be increased, the drying time can be shortened,
In addition, clothes can be dried gently.

Further, since the air outlet of the circulation side fan case is divided into a plurality of portions and at least one circulation air outlet is provided without passing through the heater, the temperature of the hot air is lowered and the clothes can be dried more easily.

Further, a substantially donut-shaped cooling plate having a ventilation window corresponding to a ventilation port is provided on the rear surface of the rotary drum, and the cooling plate has a cylindrical inclined sealing surface of an inner seal and an outer seal. Since the rear surface of the rotary drum is fixed by providing a space, it is possible to prevent an increase in the temperature of the rear surface of the rotary drum and improve safety.

Further, since a plurality of cooling holes are provided on the outer circumference of the cooling plate, the effect of the cooling plate is further exerted, and the safety can be further improved.

The baffle is made of synthetic resin, and the inlet of the baffle is projected and fixed rearward from the blower port on the rear surface of the rotary drum, and the blower window of the cooling plate is housed in the projecting portion and screwed. Since the rear surface of the rotary drum and the cooling plate are fastened together and fixed to the baffle, the leakage of circulating air is eliminated and the dry and dehumidifying performance can be secured.

Further, a substantially ring is formed on the outer periphery of the blade of the double-blade fan, and a plurality of substantially ring-shaped recesses having a comb-teeth cross section are provided in the cooling-side fan case so as to seal the circulating air. Since the belt for driving the two-blade fan by the motor has a convex portion on the back plate and the pressure wall which is higher than other portions only near the belt is provided on the outer periphery of the cooling fan case in a substantially ring shape, the leakage of circulating air is prevented. Is eliminated, and the dry dehumidification performance can be improved.

[Brief description of drawings]

FIG. 1A is a vertical sectional view of a clothes dryer according to a first embodiment of the present invention, and FIG. 1B is an enlarged sectional view of an outer seal of the clothes dryer.

FIG. 2 is an exploded perspective view of essential parts of a clothes dryer according to a second embodiment of the present invention.

FIG. 3 is a rear view of the clothes dryer according to the third embodiment of the present invention with the back plate removed.

FIG. 4 is a perspective view showing a cooling wind tunnel of a clothes dryer according to a fourth embodiment of the present invention.

FIG. 5 is a perspective view of a circulation side fan case of a clothes dryer according to a fifth embodiment of the present invention.

FIG. 6 is a perspective view of a circulation side fan case of a clothes dryer according to a sixth embodiment of the present invention.

FIG. 7 is a perspective view of a rotating drum and a cooling plate of a clothes dryer according to a seventh embodiment of the present invention.

FIG. 8 is an exploded perspective view in which a rotary drum and a cooling plate of a clothes dryer according to an eighth embodiment of the present invention are partially cut away.

FIG. 9 is an enlarged cross-sectional view showing attachment of a cooling plate of a clothes dryer according to a ninth embodiment of the present invention.

FIG. 10 is an exploded rear perspective view of the cooling fan case of the clothes dryer according to the tenth embodiment of the present invention.

FIG. 11 is an enlarged sectional view showing a pressure wall of a cooling side fan case of the clothes dryer.

FIG. 12 is a vertical sectional view of a conventional clothes dryer.

[Explanation of symbols]

1 outer frame 2 rotating drums 2a intake port 2b Blower Three-sided fan 6 Circulation side fan case 6a Intake hole 6b outlet 7 shaft 11 heater 12 baffles 12a wind tunnel 12b ventilation hole 13 Inner seal 16 outer seal 16a non-woven fabric 16b elastic

Front page continuation (72) Inventor Noboru Sakamoto 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor, Yasuhiko Ota 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56 ) References JP-A-6-134189 (JP, A) JP-A-5-15696 (JP, A) JP-A-1-175897 (JP, A) JP-A-3-178698 (JP, A) JP-A 6-218191 (JP, A) Actually open 62-1009094 (JP, U) Actually open 2-86492 (JP, U) Actually open 3-114196 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 58/02

Claims (10)

(57) [Claims] 1. A rotary drum, which is rotatably arranged in an outer frame, has an intake port provided at a substantially central portion of a rear surface thereof, and has a plurality of air blowing ports, and heat exchanges between circulating air and cooling air and has a blowing function. A double-blade fan having, and a shaft that pivotally supports the rotary drum at the rear and also axially supports the double-blade fan,
A circulation side fan case in which an air intake hole of the double-blade fan is provided in a substantially central portion and an air outlet is provided in a substantially outer peripheral portion, a heater provided in the vicinity of the air outlet of the circulation side fan case, and a blower for the rotating drum A baffle having a wind tunnel communicating with the mouth and a plurality of blowing holes and fixed to the outer peripheral portion of the rotating drum; and a substantially cylindrical inner seal fixed to the outer periphery of the intake hole provided in the substantially central portion of the circulation side fan case. A substantially cylindrical outer seal fixed to the outer circumference of the heater, and the air outlet of the circulation side fan case, the heater, the air outlet of the rotating drum, the air outlet of the baffle, the air inlet of the rotating drum, the circulation side fan case. intake holes, the air flow circulation path of the air outlet of the circulation side fan case with hermetically formed, said outer side seal is composed of a nonwoven fabric such as felt having an inner flexible, the outer periphery of the rubber Elastic body A two-layer structure, both the contact separation and clothes dryer the height of the elastic member was equal to or lower the height of the nonwoven fabric. 2. A circulation side fan case is formed of synthetic resin, and a shaft is fixed to a substantially circular shaft support plate having an intake port attached to a substantially central portion of the circulation side fan case, and an inner side including a heater. A substantially donut-shaped fan case mounting plate is fixed to the circulation side fan case as a heat shield between the seal and the outer seal, and the inner seal is sandwiched between the shaft support plate and the fan case mounting plate and the fan case is mounted. The clothes dryer according to claim 1, wherein the outer seal is sandwiched and fixed between a plate and a cylindrical rib provided on the circulation side fan case. 3. The blower outlet of the circulation side fan case is constructed so that a curved wind tunnel is formed by a partition plate to introduce the circulating air to the heater, a heater is arranged behind the partition plate, and the partition plate is attached and detached. The clothes dryer according to claim 1, which is free. 4. A first fan case in which a rotary drum and a motor for rotationally driving a two-blade fan are arranged in a corner portion in the outer frame, and the circulation side fan case has a vortex chamber formed by a partition plate of the two-blade fan. And a circulation wind tunnel, and a second fan case for fixing the heater, the shaft, the inner seal, and the outer seal, and an outside for introducing a part of the cooling air into the motor from the first fan case and the second fan case. The clothes dryer according to claim 1, wherein a substantially L-shaped cooling wind tunnel extending from the front-rear direction of the frame to the vicinity of the motor is formed. 5. The clothes dryer according to claim 1, wherein the air outlet of the circulation side fan case is divided into a plurality of openings, and a plurality of heaters are provided. 6. The clothes dryer according to claim 1, wherein the circulation side fan case is provided with a plurality of air outlets divided therein, and at least one circulation air outlet not passing through the heater is provided. 7. A substantially donut-shaped cooling plate having a blower window corresponding to a blower opening is provided on the rear surface of the rotary drum, and the cooling plate has a cylindrical inclined sealing surface of an inner seal and an outer seal, The clothes dryer according to claim 1, wherein a space is provided between the rear surface of the rotating drum and the rotating drum, and the space is fixed. 8. The clothes dryer according to claim 7, wherein a plurality of cooling holes are provided on the outer periphery of the cooling plate. 9. The baffle is made of synthetic resin, and the introduction port of the baffle is projected and fixed rearward from a blower port on the rear surface of the drum, and a blower window of a cooling plate is housed in the projecting portion and is fixed by a screw. The clothes dryer according to claim 1, wherein the rear surface of the drum and the cooling plate are fastened together and fixed to the baffle. 10. A substantially ring is formed on the outer circumference of the blade of a double-blade fan, and a plurality of substantially ring-shaped recesses having a comb-teeth cross section are provided in the cooling-side fan case so as to seal circulating air. 2. A belt for driving a two-blade fan by a motor has a convex portion formed on a back plate, and a pressure wall which is higher than other portions only in the vicinity of the belt is provided on a substantially ring-shaped outer periphery of a cooling side fan case. Clothes dryer.